*/
#include "database-private.h"
+#include "parse-time-vrp.h"
+#include "string-util.h"
#include <iostream>
-#include <xapian.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+#include <signal.h>
+#include <ftw.h>
#include <glib.h> /* g_free, GPtrArray, GHashTable */
+#include <glib-object.h> /* g_type_init */
+
+#include <gmime/gmime.h> /* g_mime_init */
using namespace std;
const char *prefix;
} prefix_t;
-/* Here's the current schema for our database:
+#define NOTMUCH_DATABASE_VERSION 3
+
+#define STRINGIFY(s) _SUB_STRINGIFY(s)
+#define _SUB_STRINGIFY(s) #s
+
+/* Here's the current schema for our database (for NOTMUCH_DATABASE_VERSION):
*
- * We currently have two different types of documents: mail and timestamps.
+ * We currently have three different types of documents (mail, ghost,
+ * and directory) and also some metadata.
*
* Mail document
* -------------
- * A mail document is associated with a particular email message file
- * on disk. It is indexed with the following prefixed terms:
+ * A mail document is associated with a particular email message. It
+ * is stored in one or more files on disk (though only one has its
+ * content indexed) and is uniquely identified by its "id" field
+ * (which is generally the message ID). It is indexed with the
+ * following prefixed terms which the database uses to construct
+ * threads, etc.:
*
* Single terms of given prefix:
*
* type: mail
*
- * id: Unique ID of mail, (from Message-ID header or generated
- * as "notmuch-sha1-<sha1_sum_of_entire_file>.
+ * id: Unique ID of mail. This is from the Message-ID header
+ * if present and not too long (see NOTMUCH_MESSAGE_ID_MAX).
+ * If it's present and too long, then we use
+ * "notmuch-sha1-<sha1_sum_of_message_id>".
+ * If this header is not present, we use
+ * "notmuch-sha1-<sha1_sum_of_entire_file>".
*
* thread: The ID of the thread to which the mail belongs
*
+ * replyto: The ID from the In-Reply-To header of the mail (if any).
+ *
* Multiple terms of given prefix:
*
- * ref: All unresolved message IDs from In-Reply-To and
- * References headers in the message. (Once a referenced
- * message is added to the database and the thread IDs
- * are linked the corresponding "ref" term is dropped
- * from the message document.)
+ * reference: All message IDs from In-Reply-To and References
+ * headers in the message.
*
- * tag: Any tags associated with this message by the user.
+ * tag: Any tags associated with this message by the user.
*
- * A mail document also has two values:
+ * file-direntry: A colon-separated pair of values
+ * (INTEGER:STRING), where INTEGER is the
+ * document ID of a directory document, and
+ * STRING is the name of a file within that
+ * directory for this mail message.
+ *
+ * A mail document also has four values:
*
* TIMESTAMP: The time_t value corresponding to the message's
* Date header.
*
* MESSAGE_ID: The unique ID of the mail mess (see "id" above)
*
- * Timestamp document
+ * FROM: The value of the "From" header
+ *
+ * SUBJECT: The value of the "Subject" header
+ *
+ * LAST_MOD: The revision number as of the last tag or
+ * filename change.
+ *
+ * In addition, terms from the content of the message are added with
+ * "from", "to", "attachment", and "subject" prefixes for use by the
+ * user in searching. Similarly, terms from the path of the mail
+ * message are added with "folder" and "path" prefixes. But the
+ * database doesn't really care itself about any of these.
+ *
+ * The data portion of a mail document is empty.
+ *
+ * Ghost mail document [if NOTMUCH_FEATURE_GHOSTS]
+ * -----------------------------------------------
+ * A ghost mail document is like a mail document, but where we don't
+ * have the message content. These are used to track thread reference
+ * information for messages we haven't received.
+ *
+ * A ghost mail document has type: ghost; id and thread fields that
+ * are identical to the mail document fields; and a MESSAGE_ID value.
+ *
+ * Directory document
* ------------------
- * A timestamp document is used by a client of the notmuch library to
+ * A directory document is used by a client of the notmuch library to
* maintain data necessary to allow for efficient polling of mail
- * directories. The notmuch library does no interpretation of
- * timestamps, but merely allows the user to store and retrieve
- * timestamps as name/value pairs.
+ * directories.
+ *
+ * All directory documents contain one term:
+ *
+ * directory: The directory path (relative to the database path)
+ * Or the SHA1 sum of the directory path (if the
+ * path itself is too long to fit in a Xapian
+ * term).
+ *
+ * And all directory documents for directories other than top-level
+ * directories also contain the following term:
+ *
+ * directory-direntry: A colon-separated pair of values
+ * (INTEGER:STRING), where INTEGER is the
+ * document ID of the parent directory
+ * document, and STRING is the name of this
+ * directory within that parent.
*
- * The timestamp document is indexed with a single prefixed term:
+ * All directory documents have a single value:
*
- * timestamp: The user's key value (likely a directory name)
+ * TIMESTAMP: The mtime of the directory (at last scan)
*
- * and has a single value:
+ * The data portion of a directory document contains the path of the
+ * directory (relative to the database path).
*
- * TIMESTAMP: The time_t value from the user.
+ * Database metadata
+ * -----------------
+ * Xapian allows us to store arbitrary name-value pairs as
+ * "metadata". We currently use the following metadata names with the
+ * given meanings:
+ *
+ * version The database schema version, (which is distinct
+ * from both the notmuch package version (see
+ * notmuch --version) and the libnotmuch library
+ * version. The version is stored as an base-10
+ * ASCII integer. The initial database version
+ * was 1, (though a schema existed before that
+ * were no "version" database value existed at
+ * all). Successive versions are allocated as
+ * changes are made to the database (such as by
+ * indexing new fields).
+ *
+ * features The set of features supported by this
+ * database. This consists of a set of
+ * '\n'-separated lines, where each is a feature
+ * name, a '\t', and compatibility flags. If the
+ * compatibility flags contain 'w', then the
+ * opener must support this feature to safely
+ * write this database. If the compatibility
+ * flags contain 'r', then the opener must
+ * support this feature to read this database.
+ * Introduced in database version 3.
+ *
+ * last_thread_id The last thread ID generated. This is stored
+ * as a 16-byte hexadecimal ASCII representation
+ * of a 64-bit unsigned integer. The first ID
+ * generated is 1 and the value will be
+ * incremented for each thread ID.
+ *
+ * Obsolete metadata
+ * -----------------
+ *
+ * If ! NOTMUCH_FEATURE_GHOSTS, there are no ghost mail documents.
+ * Instead, the database has the following additional database
+ * metadata:
+ *
+ * thread_id_* A pre-allocated thread ID for a particular
+ * message. This is actually an arbitrarily large
+ * family of metadata name. Any particular name is
+ * formed by concatenating "thread_id_" with a message
+ * ID (or the SHA1 sum of a message ID if it is very
+ * long---see description of 'id' in the mail
+ * document). The value stored is a thread ID.
+ *
+ * These thread ID metadata values are stored
+ * whenever a message references a parent message
+ * that does not yet exist in the database. A
+ * thread ID will be allocated and stored, and if
+ * the message is later added, the stored thread
+ * ID will be used (and the metadata value will
+ * be cleared).
+ *
+ * Even before a message is added, it's
+ * pre-allocated thread ID is useful so that all
+ * descendant messages that reference this common
+ * parent can be recognized as belonging to the
+ * same thread.
*/
/* With these prefix values we follow the conventions published here:
* nearly universal to all mail messages).
*/
-prefix_t BOOLEAN_PREFIX_INTERNAL[] = {
- { "type", "T" },
- { "ref", "XREFERENCE" },
- { "replyto", "XREPLYTO" },
- { "timestamp", "XTIMESTAMP" },
+static prefix_t BOOLEAN_PREFIX_INTERNAL[] = {
+ { "type", "T" },
+ { "reference", "XREFERENCE" },
+ { "replyto", "XREPLYTO" },
+ { "directory", "XDIRECTORY" },
+ { "file-direntry", "XFDIRENTRY" },
+ { "directory-direntry", "XDDIRENTRY" },
};
-prefix_t BOOLEAN_PREFIX_EXTERNAL[] = {
- { "thread", "G" },
- { "tag", "K" },
- { "id", "Q" }
+static prefix_t BOOLEAN_PREFIX_EXTERNAL[] = {
+ { "thread", "G" },
+ { "tag", "K" },
+ { "is", "K" },
+ { "id", "Q" },
+ { "path", "P" },
+ /*
+ * Without the ":", since this is a multi-letter prefix, Xapian
+ * will add a colon itself if the first letter of the path is
+ * upper-case ASCII. Including the ":" forces there to always be a
+ * colon, which keeps our own logic simpler.
+ */
+ { "folder", "XFOLDER:" },
};
-prefix_t PROBABILISTIC_PREFIX[]= {
- { "from", "XFROM" },
- { "to", "XTO" },
- { "attachment", "XATTACHMENT" },
- { "subject", "XSUBJECT"}
+static prefix_t PROBABILISTIC_PREFIX[]= {
+ { "from", "XFROM" },
+ { "to", "XTO" },
+ { "attachment", "XATTACHMENT" },
+ { "mimetype", "XMIMETYPE"},
+ { "subject", "XSUBJECT"},
};
-int
-_internal_error (const char *format, ...)
-{
- va_list va_args;
-
- va_start (va_args, format);
-
- fprintf (stderr, "Internal error: ");
- vfprintf (stderr, format, va_args);
-
- exit (1);
-
- return 1;
-}
-
const char *
_find_prefix (const char *name)
{
unsigned int i;
- for (i = 0; i < ARRAY_SIZE (BOOLEAN_PREFIX_INTERNAL); i++)
+ for (i = 0; i < ARRAY_SIZE (BOOLEAN_PREFIX_INTERNAL); i++) {
if (strcmp (name, BOOLEAN_PREFIX_INTERNAL[i].name) == 0)
return BOOLEAN_PREFIX_INTERNAL[i].prefix;
+ }
- for (i = 0; i < ARRAY_SIZE (BOOLEAN_PREFIX_EXTERNAL); i++)
+ for (i = 0; i < ARRAY_SIZE (BOOLEAN_PREFIX_EXTERNAL); i++) {
if (strcmp (name, BOOLEAN_PREFIX_EXTERNAL[i].name) == 0)
return BOOLEAN_PREFIX_EXTERNAL[i].prefix;
+ }
- for (i = 0; i < ARRAY_SIZE (PROBABILISTIC_PREFIX); i++)
+ for (i = 0; i < ARRAY_SIZE (PROBABILISTIC_PREFIX); i++) {
if (strcmp (name, PROBABILISTIC_PREFIX[i].name) == 0)
return PROBABILISTIC_PREFIX[i].prefix;
+ }
INTERNAL_ERROR ("No prefix exists for '%s'\n", name);
return "";
}
+static const struct {
+ /* NOTMUCH_FEATURE_* value. */
+ _notmuch_features value;
+ /* Feature name as it appears in the database. This name should
+ * be appropriate for displaying to the user if an older version
+ * of notmuch doesn't support this feature. */
+ const char *name;
+ /* Compatibility flags when this feature is declared. */
+ const char *flags;
+} feature_names[] = {
+ { NOTMUCH_FEATURE_FILE_TERMS,
+ "multiple paths per message", "rw" },
+ { NOTMUCH_FEATURE_DIRECTORY_DOCS,
+ "relative directory paths", "rw" },
+ /* Header values are not required for reading a database because a
+ * reader can just refer to the message file. */
+ { NOTMUCH_FEATURE_FROM_SUBJECT_ID_VALUES,
+ "from/subject/message-ID in database", "w" },
+ { NOTMUCH_FEATURE_BOOL_FOLDER,
+ "exact folder:/path: search", "rw" },
+ { NOTMUCH_FEATURE_GHOSTS,
+ "mail documents for missing messages", "w"},
+ /* Knowledge of the index mime-types are not required for reading
+ * a database because a reader will just be unable to query
+ * them. */
+ { NOTMUCH_FEATURE_INDEXED_MIMETYPES,
+ "indexed MIME types", "w"},
+ { NOTMUCH_FEATURE_LAST_MOD,
+ "modification tracking", "w"},
+};
+
const char *
notmuch_status_to_string (notmuch_status_t status)
{
return "No error occurred";
case NOTMUCH_STATUS_OUT_OF_MEMORY:
return "Out of memory";
+ case NOTMUCH_STATUS_READ_ONLY_DATABASE:
+ return "Attempt to write to a read-only database";
case NOTMUCH_STATUS_XAPIAN_EXCEPTION:
return "A Xapian exception occurred";
case NOTMUCH_STATUS_FILE_ERROR:
case NOTMUCH_STATUS_TAG_TOO_LONG:
return "Tag value is too long (exceeds NOTMUCH_TAG_MAX)";
case NOTMUCH_STATUS_UNBALANCED_FREEZE_THAW:
- return "Unblanced number of calls to notmuch_message_freeze/thaw";
+ return "Unbalanced number of calls to notmuch_message_freeze/thaw";
+ case NOTMUCH_STATUS_UNBALANCED_ATOMIC:
+ return "Unbalanced number of calls to notmuch_database_begin_atomic/end_atomic";
+ case NOTMUCH_STATUS_UNSUPPORTED_OPERATION:
+ return "Unsupported operation";
+ case NOTMUCH_STATUS_UPGRADE_REQUIRED:
+ return "Operation requires a database upgrade";
+ case NOTMUCH_STATUS_PATH_ERROR:
+ return "Path supplied is illegal for this function";
default:
case NOTMUCH_STATUS_LAST_STATUS:
return "Unknown error status value";
}
}
+void
+_notmuch_database_log (notmuch_database_t *notmuch,
+ const char *format,
+ ...)
+{
+ va_list va_args;
+
+ va_start (va_args, format);
+
+ if (notmuch->status_string)
+ talloc_free (notmuch->status_string);
+
+ notmuch->status_string = talloc_vasprintf (notmuch, format, va_args);
+
+ va_end (va_args);
+}
+
+static void
+find_doc_ids_for_term (notmuch_database_t *notmuch,
+ const char *term,
+ Xapian::PostingIterator *begin,
+ Xapian::PostingIterator *end)
+{
+ *begin = notmuch->xapian_db->postlist_begin (term);
+
+ *end = notmuch->xapian_db->postlist_end (term);
+}
+
static void
find_doc_ids (notmuch_database_t *notmuch,
const char *prefix_name,
Xapian::PostingIterator *begin,
Xapian::PostingIterator *end)
{
- Xapian::PostingIterator i;
char *term;
term = talloc_asprintf (notmuch, "%s%s",
_find_prefix (prefix_name), value);
- *begin = notmuch->xapian_db->postlist_begin (term);
-
- *end = notmuch->xapian_db->postlist_end (term);
+ find_doc_ids_for_term (notmuch, term, begin, end);
talloc_free (term);
}
-static notmuch_private_status_t
-find_unique_doc_id (notmuch_database_t *notmuch,
- const char *prefix_name,
- const char *value,
- unsigned int *doc_id)
+notmuch_private_status_t
+_notmuch_database_find_unique_doc_id (notmuch_database_t *notmuch,
+ const char *prefix_name,
+ const char *value,
+ unsigned int *doc_id)
{
Xapian::PostingIterator i, end;
if (i == end) {
*doc_id = 0;
return NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND;
- } else {
- *doc_id = *i;
- return NOTMUCH_PRIVATE_STATUS_SUCCESS;
}
+
+ *doc_id = *i;
+
+#if DEBUG_DATABASE_SANITY
+ i++;
+
+ if (i != end)
+ INTERNAL_ERROR ("Term %s:%s is not unique as expected.\n",
+ prefix_name, value);
+#endif
+
+ return NOTMUCH_PRIVATE_STATUS_SUCCESS;
}
static Xapian::Document
return notmuch->xapian_db->get_document (doc_id);
}
-static notmuch_private_status_t
-find_unique_document (notmuch_database_t *notmuch,
- const char *prefix_name,
- const char *value,
- Xapian::Document *document,
- unsigned int *doc_id)
+/* Generate a compressed version of 'message_id' of the form:
+ *
+ * notmuch-sha1-<sha1_sum_of_message_id>
+ */
+char *
+_notmuch_message_id_compressed (void *ctx, const char *message_id)
{
- notmuch_private_status_t status;
+ char *sha1, *compressed;
- status = find_unique_doc_id (notmuch, prefix_name, value, doc_id);
+ sha1 = _notmuch_sha1_of_string (message_id);
- if (status) {
- *document = Xapian::Document ();
- return status;
- }
+ compressed = talloc_asprintf (ctx, "notmuch-sha1-%s", sha1);
+ free (sha1);
- *document = find_document_for_doc_id (notmuch, *doc_id);
- return NOTMUCH_PRIVATE_STATUS_SUCCESS;
+ return compressed;
}
-notmuch_message_t *
+notmuch_status_t
notmuch_database_find_message (notmuch_database_t *notmuch,
- const char *message_id)
+ const char *message_id,
+ notmuch_message_t **message_ret)
{
notmuch_private_status_t status;
unsigned int doc_id;
- status = find_unique_doc_id (notmuch, "id", message_id, &doc_id);
+ if (message_ret == NULL)
+ return NOTMUCH_STATUS_NULL_POINTER;
- if (status == NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND)
- return NULL;
+ if (strlen (message_id) > NOTMUCH_MESSAGE_ID_MAX)
+ message_id = _notmuch_message_id_compressed (notmuch, message_id);
+
+ try {
+ status = _notmuch_database_find_unique_doc_id (notmuch, "id",
+ message_id, &doc_id);
+
+ if (status == NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND)
+ *message_ret = NULL;
+ else {
+ *message_ret = _notmuch_message_create (notmuch, notmuch, doc_id,
+ NULL);
+ if (*message_ret == NULL)
+ return NOTMUCH_STATUS_OUT_OF_MEMORY;
+ }
- return _notmuch_message_create (notmuch, notmuch, doc_id, NULL);
+ return NOTMUCH_STATUS_SUCCESS;
+ } catch (const Xapian::Error &error) {
+ _notmuch_database_log (notmuch, "A Xapian exception occurred finding message: %s.\n",
+ error.get_msg().c_str());
+ notmuch->exception_reported = TRUE;
+ *message_ret = NULL;
+ return NOTMUCH_STATUS_XAPIAN_EXCEPTION;
+ }
}
/* Advance 'str' past any whitespace or RFC 822 comments. A comment is
int nesting = 1;
s++;
while (*s && nesting) {
- if (*s == '(')
+ if (*s == '(') {
nesting++;
- else if (*s == ')')
+ } else if (*s == ')') {
nesting--;
- else if (*s == '\\')
+ } else if (*s == '\\') {
if (*(s+1))
s++;
+ }
s++;
}
}
}
/* Parse an RFC 822 message-id, discarding whitespace, any RFC 822
- * comments, and the '<' and '>' delimeters.
+ * comments, and the '<' and '>' delimiters.
*
* If not NULL, then *next will be made to point to the first character
* not parsed, (possibly pointing to the final '\0' terminator.
* Returns a newly talloc'ed string belonging to 'ctx'.
*
* Returns NULL if there is any error parsing the message-id. */
-char *
+static char *
_parse_message_id (void *ctx, const char *message_id, const char **next)
{
const char *s, *end;
char *result;
- if (message_id == NULL)
+ if (message_id == NULL || *message_id == '\0')
return NULL;
s = message_id;
}
/* Parse a References header value, putting a (talloc'ed under 'ctx')
- * copy of each referenced message-id into 'hash'. */
-static void
+ * copy of each referenced message-id into 'hash'.
+ *
+ * We explicitly avoid including any reference identical to
+ * 'message_id' in the result (to avoid mass confusion when a single
+ * message references itself cyclically---and yes, mail messages are
+ * not infrequent in the wild that do this---don't ask me why).
+ *
+ * Return the last reference parsed, if it is not equal to message_id.
+ */
+static char *
parse_references (void *ctx,
+ const char *message_id,
GHashTable *hash,
const char *refs)
{
- char *ref;
+ char *ref, *last_ref = NULL;
- if (refs == NULL)
- return;
+ if (refs == NULL || *refs == '\0')
+ return NULL;
while (*refs) {
ref = _parse_message_id (ctx, refs, &refs);
- if (ref)
+ if (ref && strcmp (ref, message_id)) {
g_hash_table_insert (hash, ref, NULL);
+ last_ref = ref;
+ }
+ }
+
+ /* The return value of this function is used to add a parent
+ * reference to the database. We should avoid making a message
+ * its own parent, thus the above check.
+ */
+ return last_ref;
+}
+
+notmuch_status_t
+notmuch_database_create (const char *path, notmuch_database_t **database)
+{
+ char *status_string = NULL;
+ notmuch_status_t status;
+
+ status = notmuch_database_create_verbose (path, database,
+ &status_string);
+
+ if (status_string) {
+ fputs (status_string, stderr);
+ free (status_string);
}
+
+ return status;
}
-notmuch_database_t *
-notmuch_database_create (const char *path)
+notmuch_status_t
+notmuch_database_create_verbose (const char *path,
+ notmuch_database_t **database,
+ char **status_string)
{
+ notmuch_status_t status = NOTMUCH_STATUS_SUCCESS;
notmuch_database_t *notmuch = NULL;
char *notmuch_path = NULL;
+ char *message = NULL;
struct stat st;
int err;
if (path == NULL) {
- fprintf (stderr, "Error: Cannot create a database for a NULL path.\n");
+ message = strdup ("Error: Cannot create a database for a NULL path.\n");
+ status = NOTMUCH_STATUS_NULL_POINTER;
+ goto DONE;
+ }
+
+ if (path[0] != '/') {
+ message = strdup ("Error: Database path must be absolute.\n");
+ status = NOTMUCH_STATUS_PATH_ERROR;
goto DONE;
}
err = stat (path, &st);
if (err) {
- fprintf (stderr, "Error: Cannot create database at %s: %s.\n",
- path, strerror (errno));
+ IGNORE_RESULT (asprintf (&message, "Error: Cannot create database at %s: %s.\n",
+ path, strerror (errno)));
+ status = NOTMUCH_STATUS_FILE_ERROR;
goto DONE;
}
if (! S_ISDIR (st.st_mode)) {
- fprintf (stderr, "Error: Cannot create database at %s: Not a directory.\n",
- path);
+ IGNORE_RESULT (asprintf (&message, "Error: Cannot create database at %s: "
+ "Not a directory.\n",
+ path));
+ status = NOTMUCH_STATUS_FILE_ERROR;
goto DONE;
}
err = mkdir (notmuch_path, 0755);
if (err) {
- fprintf (stderr, "Error: Cannot create directory %s: %s.\n",
- notmuch_path, strerror (errno));
+ IGNORE_RESULT (asprintf (&message, "Error: Cannot create directory %s: %s.\n",
+ notmuch_path, strerror (errno)));
+ status = NOTMUCH_STATUS_FILE_ERROR;
goto DONE;
}
- notmuch = notmuch_database_open (path);
+ status = notmuch_database_open_verbose (path,
+ NOTMUCH_DATABASE_MODE_READ_WRITE,
+ ¬much, &message);
+ if (status)
+ goto DONE;
+
+ /* Upgrade doesn't add these feature to existing databases, but
+ * new databases have them. */
+ notmuch->features |= NOTMUCH_FEATURE_FROM_SUBJECT_ID_VALUES;
+ notmuch->features |= NOTMUCH_FEATURE_INDEXED_MIMETYPES;
+
+ status = notmuch_database_upgrade (notmuch, NULL, NULL);
+ if (status) {
+ notmuch_database_close(notmuch);
+ notmuch = NULL;
+ }
DONE:
if (notmuch_path)
talloc_free (notmuch_path);
- return notmuch;
+ if (message) {
+ if (status_string)
+ *status_string = message;
+ else
+ free (message);
+ }
+ if (database)
+ *database = notmuch;
+ else
+ talloc_free (notmuch);
+ return status;
+}
+
+notmuch_status_t
+_notmuch_database_ensure_writable (notmuch_database_t *notmuch)
+{
+ if (notmuch->mode == NOTMUCH_DATABASE_MODE_READ_ONLY) {
+ _notmuch_database_log (notmuch, "Cannot write to a read-only database.\n");
+ return NOTMUCH_STATUS_READ_ONLY_DATABASE;
+ }
+
+ return NOTMUCH_STATUS_SUCCESS;
+}
+
+/* Allocate a revision number for the next change. */
+unsigned long
+_notmuch_database_new_revision (notmuch_database_t *notmuch)
+{
+ unsigned long new_revision = notmuch->revision + 1;
+
+ /* If we're in an atomic section, hold off on updating the
+ * committed revision number until we commit the atomic section.
+ */
+ if (notmuch->atomic_nesting)
+ notmuch->atomic_dirty = TRUE;
+ else
+ notmuch->revision = new_revision;
+
+ return new_revision;
+}
+
+/* Parse a database features string from the given database version.
+ * Returns the feature bit set.
+ *
+ * For version < 3, this ignores the features string and returns a
+ * hard-coded set of features.
+ *
+ * If there are unrecognized features that are required to open the
+ * database in mode (which should be 'r' or 'w'), return a
+ * comma-separated list of unrecognized but required features in
+ * *incompat_out suitable for presenting to the user. *incompat_out
+ * will be allocated from ctx.
+ */
+static _notmuch_features
+_parse_features (const void *ctx, const char *features, unsigned int version,
+ char mode, char **incompat_out)
+{
+ _notmuch_features res = static_cast<_notmuch_features>(0);
+ unsigned int namelen, i;
+ size_t llen = 0;
+ const char *flags;
+
+ /* Prior to database version 3, features were implied by the
+ * version number. */
+ if (version == 0)
+ return NOTMUCH_FEATURES_V0;
+ else if (version == 1)
+ return NOTMUCH_FEATURES_V1;
+ else if (version == 2)
+ return NOTMUCH_FEATURES_V2;
+
+ /* Parse the features string */
+ while ((features = strtok_len_c (features + llen, "\n", &llen)) != NULL) {
+ flags = strchr (features, '\t');
+ if (! flags || flags > features + llen)
+ continue;
+ namelen = flags - features;
+
+ for (i = 0; i < ARRAY_SIZE (feature_names); ++i) {
+ if (strlen (feature_names[i].name) == namelen &&
+ strncmp (feature_names[i].name, features, namelen) == 0) {
+ res |= feature_names[i].value;
+ break;
+ }
+ }
+
+ if (i == ARRAY_SIZE (feature_names) && incompat_out) {
+ /* Unrecognized feature */
+ const char *have = strchr (flags, mode);
+ if (have && have < features + llen) {
+ /* This feature is required to access this database in
+ * 'mode', but we don't understand it. */
+ if (! *incompat_out)
+ *incompat_out = talloc_strdup (ctx, "");
+ *incompat_out = talloc_asprintf_append_buffer (
+ *incompat_out, "%s%.*s", **incompat_out ? ", " : "",
+ namelen, features);
+ }
+ }
+ }
+
+ return res;
+}
+
+static char *
+_print_features (const void *ctx, unsigned int features)
+{
+ unsigned int i;
+ char *res = talloc_strdup (ctx, "");
+
+ for (i = 0; i < ARRAY_SIZE (feature_names); ++i)
+ if (features & feature_names[i].value)
+ res = talloc_asprintf_append_buffer (
+ res, "%s\t%s\n", feature_names[i].name, feature_names[i].flags);
+
+ return res;
+}
+
+notmuch_status_t
+notmuch_database_open (const char *path,
+ notmuch_database_mode_t mode,
+ notmuch_database_t **database)
+{
+ char *status_string = NULL;
+ notmuch_status_t status;
+
+ status = notmuch_database_open_verbose (path, mode, database,
+ &status_string);
+
+ if (status_string) {
+ fputs (status_string, stderr);
+ free (status_string);
+ }
+
+ return status;
}
-notmuch_database_t *
-notmuch_database_open (const char *path)
+notmuch_status_t
+notmuch_database_open_verbose (const char *path,
+ notmuch_database_mode_t mode,
+ notmuch_database_t **database,
+ char **status_string)
{
+ notmuch_status_t status = NOTMUCH_STATUS_SUCCESS;
+ void *local = talloc_new (NULL);
notmuch_database_t *notmuch = NULL;
- char *notmuch_path = NULL, *xapian_path = NULL;
+ char *notmuch_path, *xapian_path, *incompat_features;
+ char *message = NULL;
struct stat st;
int err;
- unsigned int i;
+ unsigned int i, version;
+ static int initialized = 0;
+
+ if (path == NULL) {
+ message = strdup ("Error: Cannot open a database for a NULL path.\n");
+ status = NOTMUCH_STATUS_NULL_POINTER;
+ goto DONE;
+ }
+
+ if (path[0] != '/') {
+ message = strdup ("Error: Database path must be absolute.\n");
+ status = NOTMUCH_STATUS_PATH_ERROR;
+ goto DONE;
+ }
- if (asprintf (¬much_path, "%s/%s", path, ".notmuch") == -1) {
- notmuch_path = NULL;
- fprintf (stderr, "Out of memory\n");
+ if (! (notmuch_path = talloc_asprintf (local, "%s/%s", path, ".notmuch"))) {
+ message = strdup ("Out of memory\n");
+ status = NOTMUCH_STATUS_OUT_OF_MEMORY;
goto DONE;
}
err = stat (notmuch_path, &st);
if (err) {
- fprintf (stderr, "Error opening database at %s: %s\n",
- notmuch_path, strerror (errno));
+ IGNORE_RESULT (asprintf (&message, "Error opening database at %s: %s\n",
+ notmuch_path, strerror (errno)));
+ status = NOTMUCH_STATUS_FILE_ERROR;
goto DONE;
}
- if (asprintf (&xapian_path, "%s/%s", notmuch_path, "xapian") == -1) {
- xapian_path = NULL;
- fprintf (stderr, "Out of memory\n");
+ if (! (xapian_path = talloc_asprintf (local, "%s/%s", notmuch_path, "xapian"))) {
+ message = strdup ("Out of memory\n");
+ status = NOTMUCH_STATUS_OUT_OF_MEMORY;
goto DONE;
}
- notmuch = talloc (NULL, notmuch_database_t);
+ /* Initialize the GLib type system and threads */
+#if !GLIB_CHECK_VERSION(2, 35, 1)
+ g_type_init ();
+#endif
+
+ /* Initialize gmime */
+ if (! initialized) {
+ g_mime_init (GMIME_ENABLE_RFC2047_WORKAROUNDS);
+ initialized = 1;
+ }
+
+ notmuch = talloc_zero (NULL, notmuch_database_t);
+ notmuch->exception_reported = FALSE;
+ notmuch->status_string = NULL;
notmuch->path = talloc_strdup (notmuch, path);
if (notmuch->path[strlen (notmuch->path) - 1] == '/')
notmuch->path[strlen (notmuch->path) - 1] = '\0';
+ notmuch->mode = mode;
+ notmuch->atomic_nesting = 0;
try {
- notmuch->xapian_db = new Xapian::WritableDatabase (xapian_path,
- Xapian::DB_CREATE_OR_OPEN);
+ string last_thread_id;
+ string last_mod;
+
+ if (mode == NOTMUCH_DATABASE_MODE_READ_WRITE) {
+ notmuch->xapian_db = new Xapian::WritableDatabase (xapian_path,
+ Xapian::DB_CREATE_OR_OPEN);
+ } else {
+ notmuch->xapian_db = new Xapian::Database (xapian_path);
+ }
+
+ /* Check version. As of database version 3, we represent
+ * changes in terms of features, so assume a version bump
+ * means a dramatically incompatible change. */
+ version = notmuch_database_get_version (notmuch);
+ if (version > NOTMUCH_DATABASE_VERSION) {
+ IGNORE_RESULT (asprintf (&message,
+ "Error: Notmuch database at %s\n"
+ " has a newer database format version (%u) than supported by this\n"
+ " version of notmuch (%u).\n",
+ notmuch_path, version, NOTMUCH_DATABASE_VERSION));
+ notmuch->mode = NOTMUCH_DATABASE_MODE_READ_ONLY;
+ notmuch_database_destroy (notmuch);
+ notmuch = NULL;
+ status = NOTMUCH_STATUS_FILE_ERROR;
+ goto DONE;
+ }
+
+ /* Check features. */
+ incompat_features = NULL;
+ notmuch->features = _parse_features (
+ local, notmuch->xapian_db->get_metadata ("features").c_str (),
+ version, mode == NOTMUCH_DATABASE_MODE_READ_WRITE ? 'w' : 'r',
+ &incompat_features);
+ if (incompat_features) {
+ IGNORE_RESULT (asprintf (&message,
+ "Error: Notmuch database at %s\n"
+ " requires features (%s)\n"
+ " not supported by this version of notmuch.\n",
+ notmuch_path, incompat_features));
+ notmuch->mode = NOTMUCH_DATABASE_MODE_READ_ONLY;
+ notmuch_database_destroy (notmuch);
+ notmuch = NULL;
+ status = NOTMUCH_STATUS_FILE_ERROR;
+ goto DONE;
+ }
+
+ notmuch->last_doc_id = notmuch->xapian_db->get_lastdocid ();
+ last_thread_id = notmuch->xapian_db->get_metadata ("last_thread_id");
+ if (last_thread_id.empty ()) {
+ notmuch->last_thread_id = 0;
+ } else {
+ const char *str;
+ char *end;
+
+ str = last_thread_id.c_str ();
+ notmuch->last_thread_id = strtoull (str, &end, 16);
+ if (*end != '\0')
+ INTERNAL_ERROR ("Malformed database last_thread_id: %s", str);
+ }
+
+ /* Get current highest revision number. */
+ last_mod = notmuch->xapian_db->get_value_upper_bound (
+ NOTMUCH_VALUE_LAST_MOD);
+ if (last_mod.empty ())
+ notmuch->revision = 0;
+ else
+ notmuch->revision = Xapian::sortable_unserialise (last_mod);
+ notmuch->uuid = talloc_strdup (
+ notmuch, notmuch->xapian_db->get_uuid ().c_str ());
+
notmuch->query_parser = new Xapian::QueryParser;
notmuch->term_gen = new Xapian::TermGenerator;
notmuch->term_gen->set_stemmer (Xapian::Stem ("english"));
+ notmuch->value_range_processor = new Xapian::NumberValueRangeProcessor (NOTMUCH_VALUE_TIMESTAMP);
+ notmuch->date_range_processor = new ParseTimeValueRangeProcessor (NOTMUCH_VALUE_TIMESTAMP);
+ notmuch->last_mod_range_processor = new Xapian::NumberValueRangeProcessor (NOTMUCH_VALUE_LAST_MOD, "lastmod:");
notmuch->query_parser->set_default_op (Xapian::Query::OP_AND);
notmuch->query_parser->set_database (*notmuch->xapian_db);
notmuch->query_parser->set_stemmer (Xapian::Stem ("english"));
notmuch->query_parser->set_stemming_strategy (Xapian::QueryParser::STEM_SOME);
+ notmuch->query_parser->add_valuerangeprocessor (notmuch->value_range_processor);
+ notmuch->query_parser->add_valuerangeprocessor (notmuch->date_range_processor);
+ notmuch->query_parser->add_valuerangeprocessor (notmuch->last_mod_range_processor);
for (i = 0; i < ARRAY_SIZE (BOOLEAN_PREFIX_EXTERNAL); i++) {
prefix_t *prefix = &BOOLEAN_PREFIX_EXTERNAL[i];
notmuch->query_parser->add_prefix (prefix->name, prefix->prefix);
}
} catch (const Xapian::Error &error) {
- fprintf (stderr, "A Xapian exception occurred: %s\n",
- error.get_msg().c_str());
+ IGNORE_RESULT (asprintf (&message, "A Xapian exception occurred opening database: %s\n",
+ error.get_msg().c_str()));
+ notmuch_database_destroy (notmuch);
notmuch = NULL;
+ status = NOTMUCH_STATUS_XAPIAN_EXCEPTION;
}
-
+
DONE:
- if (notmuch_path)
- free (notmuch_path);
- if (xapian_path)
- free (xapian_path);
+ talloc_free (local);
+
+ if (message) {
+ if (status_string)
+ *status_string = message;
+ else
+ free (message);
+ }
- return notmuch;
+ if (database)
+ *database = notmuch;
+ else
+ talloc_free (notmuch);
+ return status;
}
-void
+notmuch_status_t
notmuch_database_close (notmuch_database_t *notmuch)
{
- notmuch->xapian_db->flush ();
+ notmuch_status_t status = NOTMUCH_STATUS_SUCCESS;
+
+ /* Many Xapian objects (and thus notmuch objects) hold references to
+ * the database, so merely deleting the database may not suffice to
+ * close it. Thus, we explicitly close it here. */
+ if (notmuch->xapian_db != NULL) {
+ try {
+ /* If there's an outstanding transaction, it's unclear if
+ * closing the Xapian database commits everything up to
+ * that transaction, or may discard committed (but
+ * unflushed) transactions. To be certain, explicitly
+ * cancel any outstanding transaction before closing. */
+ if (notmuch->mode == NOTMUCH_DATABASE_MODE_READ_WRITE &&
+ notmuch->atomic_nesting)
+ (static_cast <Xapian::WritableDatabase *> (notmuch->xapian_db))
+ ->cancel_transaction ();
+
+ /* Close the database. This implicitly flushes
+ * outstanding changes. */
+ notmuch->xapian_db->close();
+ } catch (const Xapian::Error &error) {
+ status = NOTMUCH_STATUS_XAPIAN_EXCEPTION;
+ if (! notmuch->exception_reported) {
+ _notmuch_database_log (notmuch, "Error: A Xapian exception occurred closing database: %s\n",
+ error.get_msg().c_str());
+ }
+ }
+ }
delete notmuch->term_gen;
+ notmuch->term_gen = NULL;
delete notmuch->query_parser;
+ notmuch->query_parser = NULL;
delete notmuch->xapian_db;
- talloc_free (notmuch);
-}
-
-const char *
-notmuch_database_get_path (notmuch_database_t *notmuch)
-{
- return notmuch->path;
+ notmuch->xapian_db = NULL;
+ delete notmuch->value_range_processor;
+ notmuch->value_range_processor = NULL;
+ delete notmuch->date_range_processor;
+ notmuch->date_range_processor = NULL;
+ delete notmuch->last_mod_range_processor;
+ notmuch->last_mod_range_processor = NULL;
+
+ return status;
}
-static notmuch_private_status_t
-find_timestamp_document (notmuch_database_t *notmuch, const char *db_key,
- Xapian::Document *doc, unsigned int *doc_id)
+#if HAVE_XAPIAN_COMPACT
+static int
+unlink_cb (const char *path,
+ unused (const struct stat *sb),
+ unused (int type),
+ unused (struct FTW *ftw))
{
- return find_unique_document (notmuch, "timestamp", db_key, doc, doc_id);
+ return remove (path);
}
-/* We allow the user to use arbitrarily long keys for timestamps,
- * (they're for filesystem paths after all, which have no limit we
- * know about). But we have a term-length limit. So if we exceed that,
- * we'll use the SHA-1 of the user's key as the actual key for
- * constructing a database term.
- *
- * Caution: This function returns a newly allocated string which the
- * caller should free() when finished.
- */
-static char *
-timestamp_db_key (const char *key)
+static int
+rmtree (const char *path)
{
- int term_len = strlen (_find_prefix ("timestamp")) + strlen (key);
-
- if (term_len > NOTMUCH_TERM_MAX)
- return notmuch_sha1_of_string (key);
- else
- return strdup (key);
+ return nftw (path, unlink_cb, 64, FTW_DEPTH | FTW_PHYS);
}
-notmuch_status_t
-notmuch_database_set_timestamp (notmuch_database_t *notmuch,
- const char *key, time_t timestamp)
+class NotmuchCompactor : public Xapian::Compactor
{
- Xapian::Document doc;
- unsigned int doc_id;
- notmuch_private_status_t status;
- notmuch_status_t ret = NOTMUCH_STATUS_SUCCESS;
- char *db_key = NULL;
+ notmuch_compact_status_cb_t status_cb;
+ void *status_closure;
- db_key = timestamp_db_key (key);
+public:
+ NotmuchCompactor(notmuch_compact_status_cb_t cb, void *closure) :
+ status_cb (cb), status_closure (closure) { }
- try {
- status = find_timestamp_document (notmuch, db_key, &doc, &doc_id);
+ virtual void
+ set_status (const std::string &table, const std::string &status)
+ {
+ char *msg;
- doc.add_value (NOTMUCH_VALUE_TIMESTAMP,
- Xapian::sortable_serialise (timestamp));
+ if (status_cb == NULL)
+ return;
- if (status == NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND) {
- char *term = talloc_asprintf (NULL, "%s%s",
- _find_prefix ("timestamp"), db_key);
- doc.add_term (term);
- talloc_free (term);
+ if (status.length () == 0)
+ msg = talloc_asprintf (NULL, "compacting table %s", table.c_str());
+ else
+ msg = talloc_asprintf (NULL, " %s", status.c_str());
- notmuch->xapian_db->add_document (doc);
- } else {
- notmuch->xapian_db->replace_document (doc_id, doc);
+ if (msg == NULL) {
+ return;
}
- } catch (Xapian::Error &error) {
- fprintf (stderr, "A Xapian exception occurred: %s.\n",
- error.get_msg().c_str());
- ret = NOTMUCH_STATUS_XAPIAN_EXCEPTION;
+ status_cb (msg, status_closure);
+ talloc_free (msg);
}
+};
- if (db_key)
- free (db_key);
-
- return ret;
-}
-
-time_t
-notmuch_database_get_timestamp (notmuch_database_t *notmuch, const char *key)
+/* Compacts the given database, optionally saving the original database
+ * in backup_path. Additionally, a callback function can be provided to
+ * give the user feedback on the progress of the (likely long-lived)
+ * compaction process.
+ *
+ * The backup path must point to a directory on the same volume as the
+ * original database. Passing a NULL backup_path will result in the
+ * uncompacted database being deleted after compaction has finished.
+ * Note that the database write lock will be held during the
+ * compaction process to protect data integrity.
+ */
+notmuch_status_t
+notmuch_database_compact (const char *path,
+ const char *backup_path,
+ notmuch_compact_status_cb_t status_cb,
+ void *closure)
{
- Xapian::Document doc;
- unsigned int doc_id;
- notmuch_private_status_t status;
- char *db_key = NULL;
- time_t ret = 0;
+ void *local;
+ char *notmuch_path, *xapian_path, *compact_xapian_path;
+ notmuch_status_t ret = NOTMUCH_STATUS_SUCCESS;
+ notmuch_database_t *notmuch = NULL;
+ struct stat statbuf;
+ notmuch_bool_t keep_backup;
+ char *message = NULL;
+
+ local = talloc_new (NULL);
+ if (! local)
+ return NOTMUCH_STATUS_OUT_OF_MEMORY;
+
+ ret = notmuch_database_open_verbose (path,
+ NOTMUCH_DATABASE_MODE_READ_WRITE,
+ ¬much,
+ &message);
+ if (ret) {
+ if (status_cb) status_cb (message, closure);
+ goto DONE;
+ }
+
+ if (! (notmuch_path = talloc_asprintf (local, "%s/%s", path, ".notmuch"))) {
+ ret = NOTMUCH_STATUS_OUT_OF_MEMORY;
+ goto DONE;
+ }
- db_key = timestamp_db_key (key);
+ if (! (xapian_path = talloc_asprintf (local, "%s/%s", notmuch_path, "xapian"))) {
+ ret = NOTMUCH_STATUS_OUT_OF_MEMORY;
+ goto DONE;
+ }
- try {
- status = find_timestamp_document (notmuch, db_key, &doc, &doc_id);
+ if (! (compact_xapian_path = talloc_asprintf (local, "%s.compact", xapian_path))) {
+ ret = NOTMUCH_STATUS_OUT_OF_MEMORY;
+ goto DONE;
+ }
- if (status == NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND)
+ if (backup_path == NULL) {
+ if (! (backup_path = talloc_asprintf (local, "%s.old", xapian_path))) {
+ ret = NOTMUCH_STATUS_OUT_OF_MEMORY;
goto DONE;
+ }
+ keep_backup = FALSE;
+ }
+ else {
+ keep_backup = TRUE;
+ }
- ret = Xapian::sortable_unserialise (doc.get_value (NOTMUCH_VALUE_TIMESTAMP));
- } catch (Xapian::Error &error) {
+ if (stat (backup_path, &statbuf) != -1) {
+ _notmuch_database_log (notmuch, "Path already exists: %s\n", backup_path);
+ ret = NOTMUCH_STATUS_FILE_ERROR;
+ goto DONE;
+ }
+ if (errno != ENOENT) {
+ _notmuch_database_log (notmuch, "Unknown error while stat()ing path: %s\n",
+ strerror (errno));
+ ret = NOTMUCH_STATUS_FILE_ERROR;
goto DONE;
}
- DONE:
- if (db_key)
- free (db_key);
+ /* Unconditionally attempt to remove old work-in-progress database (if
+ * any). This is "protected" by database lock. If this fails due to write
+ * errors (etc), the following code will fail and provide error message.
+ */
+ (void) rmtree (compact_xapian_path);
- return ret;
+ try {
+ NotmuchCompactor compactor (status_cb, closure);
+
+ compactor.set_renumber (false);
+ compactor.add_source (xapian_path);
+ compactor.set_destdir (compact_xapian_path);
+ compactor.compact ();
+ } catch (const Xapian::Error &error) {
+ _notmuch_database_log (notmuch, "Error while compacting: %s\n", error.get_msg().c_str());
+ ret = NOTMUCH_STATUS_XAPIAN_EXCEPTION;
+ goto DONE;
+ }
+
+ if (rename (xapian_path, backup_path)) {
+ _notmuch_database_log (notmuch, "Error moving %s to %s: %s\n",
+ xapian_path, backup_path, strerror (errno));
+ ret = NOTMUCH_STATUS_FILE_ERROR;
+ goto DONE;
+ }
+
+ if (rename (compact_xapian_path, xapian_path)) {
+ _notmuch_database_log (notmuch, "Error moving %s to %s: %s\n",
+ compact_xapian_path, xapian_path, strerror (errno));
+ ret = NOTMUCH_STATUS_FILE_ERROR;
+ goto DONE;
+ }
+
+ if (! keep_backup) {
+ if (rmtree (backup_path)) {
+ _notmuch_database_log (notmuch, "Error removing old database %s: %s\n",
+ backup_path, strerror (errno));
+ ret = NOTMUCH_STATUS_FILE_ERROR;
+ goto DONE;
+ }
+ }
+
+ DONE:
+ if (notmuch) {
+ notmuch_status_t ret2;
+
+ const char *str = notmuch_database_status_string (notmuch);
+ if (status_cb && str)
+ status_cb (str, closure);
+
+ ret2 = notmuch_database_destroy (notmuch);
+
+ /* don't clobber previous error status */
+ if (ret == NOTMUCH_STATUS_SUCCESS && ret2 != NOTMUCH_STATUS_SUCCESS)
+ ret = ret2;
+ }
+
+ talloc_free (local);
+
+ return ret;
+}
+#else
+notmuch_status_t
+notmuch_database_compact (unused (const char *path),
+ unused (const char *backup_path),
+ unused (notmuch_compact_status_cb_t status_cb),
+ unused (void *closure))
+{
+ _notmuch_database_log (notmuch, "notmuch was compiled against a xapian version lacking compaction support.\n");
+ return NOTMUCH_STATUS_UNSUPPORTED_OPERATION;
}
+#endif
-/* Find the thread ID to which the message with 'message_id' belongs.
+notmuch_status_t
+notmuch_database_destroy (notmuch_database_t *notmuch)
+{
+ notmuch_status_t status;
+
+ status = notmuch_database_close (notmuch);
+ talloc_free (notmuch);
+
+ return status;
+}
+
+const char *
+notmuch_database_get_path (notmuch_database_t *notmuch)
+{
+ return notmuch->path;
+}
+
+unsigned int
+notmuch_database_get_version (notmuch_database_t *notmuch)
+{
+ unsigned int version;
+ string version_string;
+ const char *str;
+ char *end;
+
+ version_string = notmuch->xapian_db->get_metadata ("version");
+ if (version_string.empty ())
+ return 0;
+
+ str = version_string.c_str ();
+ if (str == NULL || *str == '\0')
+ return 0;
+
+ version = strtoul (str, &end, 10);
+ if (*end != '\0')
+ INTERNAL_ERROR ("Malformed database version: %s", str);
+
+ return version;
+}
+
+notmuch_bool_t
+notmuch_database_needs_upgrade (notmuch_database_t *notmuch)
+{
+ return notmuch->mode == NOTMUCH_DATABASE_MODE_READ_WRITE &&
+ ((NOTMUCH_FEATURES_CURRENT & ~notmuch->features) ||
+ (notmuch_database_get_version (notmuch) < NOTMUCH_DATABASE_VERSION));
+}
+
+static volatile sig_atomic_t do_progress_notify = 0;
+
+static void
+handle_sigalrm (unused (int signal))
+{
+ do_progress_notify = 1;
+}
+
+/* Upgrade the current database.
+ *
+ * After opening a database in read-write mode, the client should
+ * check if an upgrade is needed (notmuch_database_needs_upgrade) and
+ * if so, upgrade with this function before making any modifications.
+ *
+ * The optional progress_notify callback can be used by the caller to
+ * provide progress indication to the user. If non-NULL it will be
+ * called periodically with 'count' as the number of messages upgraded
+ * so far and 'total' the overall number of messages that will be
+ * converted.
+ */
+notmuch_status_t
+notmuch_database_upgrade (notmuch_database_t *notmuch,
+ void (*progress_notify) (void *closure,
+ double progress),
+ void *closure)
+{
+ void *local = talloc_new (NULL);
+ Xapian::TermIterator t, t_end;
+ Xapian::WritableDatabase *db;
+ struct sigaction action;
+ struct itimerval timerval;
+ notmuch_bool_t timer_is_active = FALSE;
+ enum _notmuch_features target_features, new_features;
+ notmuch_status_t status;
+ notmuch_private_status_t private_status;
+ notmuch_query_t *query = NULL;
+ unsigned int count = 0, total = 0;
+
+ status = _notmuch_database_ensure_writable (notmuch);
+ if (status)
+ return status;
+
+ db = static_cast <Xapian::WritableDatabase *> (notmuch->xapian_db);
+
+ target_features = notmuch->features | NOTMUCH_FEATURES_CURRENT;
+ new_features = NOTMUCH_FEATURES_CURRENT & ~notmuch->features;
+
+ if (! notmuch_database_needs_upgrade (notmuch))
+ return NOTMUCH_STATUS_SUCCESS;
+
+ if (progress_notify) {
+ /* Set up our handler for SIGALRM */
+ memset (&action, 0, sizeof (struct sigaction));
+ action.sa_handler = handle_sigalrm;
+ sigemptyset (&action.sa_mask);
+ action.sa_flags = SA_RESTART;
+ sigaction (SIGALRM, &action, NULL);
+
+ /* Then start a timer to send SIGALRM once per second. */
+ timerval.it_interval.tv_sec = 1;
+ timerval.it_interval.tv_usec = 0;
+ timerval.it_value.tv_sec = 1;
+ timerval.it_value.tv_usec = 0;
+ setitimer (ITIMER_REAL, &timerval, NULL);
+
+ timer_is_active = TRUE;
+ }
+
+ /* Figure out how much total work we need to do. */
+ if (new_features &
+ (NOTMUCH_FEATURE_FILE_TERMS | NOTMUCH_FEATURE_BOOL_FOLDER |
+ NOTMUCH_FEATURE_LAST_MOD)) {
+ query = notmuch_query_create (notmuch, "");
+ unsigned msg_count;
+
+ status = notmuch_query_count_messages_st (query, &msg_count);
+ if (status)
+ goto DONE;
+
+ total += msg_count;
+ notmuch_query_destroy (query);
+ query = NULL;
+ }
+ if (new_features & NOTMUCH_FEATURE_DIRECTORY_DOCS) {
+ t_end = db->allterms_end ("XTIMESTAMP");
+ for (t = db->allterms_begin ("XTIMESTAMP"); t != t_end; t++)
+ ++total;
+ }
+ if (new_features & NOTMUCH_FEATURE_GHOSTS) {
+ /* The ghost message upgrade converts all thread_id_*
+ * metadata values into ghost message documents. */
+ t_end = db->metadata_keys_end ("thread_id_");
+ for (t = db->metadata_keys_begin ("thread_id_"); t != t_end; ++t)
+ ++total;
+ }
+
+ /* Perform the upgrade in a transaction. */
+ db->begin_transaction (true);
+
+ /* Set the target features so we write out changes in the desired
+ * format. */
+ notmuch->features = target_features;
+
+ /* Perform per-message upgrades. */
+ if (new_features &
+ (NOTMUCH_FEATURE_FILE_TERMS | NOTMUCH_FEATURE_BOOL_FOLDER |
+ NOTMUCH_FEATURE_LAST_MOD)) {
+ notmuch_messages_t *messages;
+ notmuch_message_t *message;
+ char *filename;
+
+ query = notmuch_query_create (notmuch, "");
+
+ status = notmuch_query_search_messages_st (query, &messages);
+ if (status)
+ goto DONE;
+ for (;
+ notmuch_messages_valid (messages);
+ notmuch_messages_move_to_next (messages))
+ {
+ if (do_progress_notify) {
+ progress_notify (closure, (double) count / total);
+ do_progress_notify = 0;
+ }
+
+ message = notmuch_messages_get (messages);
+
+ /* Before version 1, each message document had its
+ * filename in the data field. Copy that into the new
+ * format by calling notmuch_message_add_filename.
+ */
+ if (new_features & NOTMUCH_FEATURE_FILE_TERMS) {
+ filename = _notmuch_message_talloc_copy_data (message);
+ if (filename && *filename != '\0') {
+ _notmuch_message_add_filename (message, filename);
+ _notmuch_message_clear_data (message);
+ }
+ talloc_free (filename);
+ }
+
+ /* Prior to version 2, the "folder:" prefix was
+ * probabilistic and stemmed. Change it to the current
+ * boolean prefix. Add "path:" prefixes while at it.
+ */
+ if (new_features & NOTMUCH_FEATURE_BOOL_FOLDER)
+ _notmuch_message_upgrade_folder (message);
+
+ /* Prior to NOTMUCH_FEATURE_LAST_MOD, messages did not
+ * track modification revisions. Give all messages the
+ * next available revision; since we just started tracking
+ * revisions for this database, that will be 1.
+ */
+ if (new_features & NOTMUCH_FEATURE_LAST_MOD)
+ _notmuch_message_upgrade_last_mod (message);
+
+ _notmuch_message_sync (message);
+
+ notmuch_message_destroy (message);
+
+ count++;
+ }
+
+ notmuch_query_destroy (query);
+ query = NULL;
+ }
+
+ /* Perform per-directory upgrades. */
+
+ /* Before version 1 we stored directory timestamps in
+ * XTIMESTAMP documents instead of the current XDIRECTORY
+ * documents. So copy those as well. */
+ if (new_features & NOTMUCH_FEATURE_DIRECTORY_DOCS) {
+ t_end = notmuch->xapian_db->allterms_end ("XTIMESTAMP");
+
+ for (t = notmuch->xapian_db->allterms_begin ("XTIMESTAMP");
+ t != t_end;
+ t++)
+ {
+ Xapian::PostingIterator p, p_end;
+ std::string term = *t;
+
+ p_end = notmuch->xapian_db->postlist_end (term);
+
+ for (p = notmuch->xapian_db->postlist_begin (term);
+ p != p_end;
+ p++)
+ {
+ Xapian::Document document;
+ time_t mtime;
+ notmuch_directory_t *directory;
+
+ if (do_progress_notify) {
+ progress_notify (closure, (double) count / total);
+ do_progress_notify = 0;
+ }
+
+ document = find_document_for_doc_id (notmuch, *p);
+ mtime = Xapian::sortable_unserialise (
+ document.get_value (NOTMUCH_VALUE_TIMESTAMP));
+
+ directory = _notmuch_directory_create (notmuch, term.c_str() + 10,
+ NOTMUCH_FIND_CREATE, &status);
+ notmuch_directory_set_mtime (directory, mtime);
+ notmuch_directory_destroy (directory);
+
+ db->delete_document (*p);
+ }
+
+ ++count;
+ }
+ }
+
+ /* Perform metadata upgrades. */
+
+ /* Prior to NOTMUCH_FEATURE_GHOSTS, thread IDs for missing
+ * messages were stored as database metadata. Change these to
+ * ghost messages.
+ */
+ if (new_features & NOTMUCH_FEATURE_GHOSTS) {
+ notmuch_message_t *message;
+ std::string message_id, thread_id;
+
+ t_end = db->metadata_keys_end (NOTMUCH_METADATA_THREAD_ID_PREFIX);
+ for (t = db->metadata_keys_begin (NOTMUCH_METADATA_THREAD_ID_PREFIX);
+ t != t_end; ++t) {
+ if (do_progress_notify) {
+ progress_notify (closure, (double) count / total);
+ do_progress_notify = 0;
+ }
+
+ message_id = (*t).substr (
+ strlen (NOTMUCH_METADATA_THREAD_ID_PREFIX));
+ thread_id = db->get_metadata (*t);
+
+ /* Create ghost message */
+ message = _notmuch_message_create_for_message_id (
+ notmuch, message_id.c_str (), &private_status);
+ if (private_status == NOTMUCH_PRIVATE_STATUS_SUCCESS) {
+ /* Document already exists; ignore the stored thread ID */
+ } else if (private_status ==
+ NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND) {
+ private_status = _notmuch_message_initialize_ghost (
+ message, thread_id.c_str ());
+ if (! private_status)
+ _notmuch_message_sync (message);
+ }
+
+ if (private_status) {
+ _notmuch_database_log (notmuch,
+ "Upgrade failed while creating ghost messages.\n");
+ status = COERCE_STATUS (private_status, "Unexpected status from _notmuch_message_initialize_ghost");
+ goto DONE;
+ }
+
+ /* Clear saved metadata thread ID */
+ db->set_metadata (*t, "");
+
+ ++count;
+ }
+ }
+
+ status = NOTMUCH_STATUS_SUCCESS;
+ db->set_metadata ("features", _print_features (local, notmuch->features));
+ db->set_metadata ("version", STRINGIFY (NOTMUCH_DATABASE_VERSION));
+
+ DONE:
+ if (status == NOTMUCH_STATUS_SUCCESS)
+ db->commit_transaction ();
+ else
+ db->cancel_transaction ();
+
+ if (timer_is_active) {
+ /* Now stop the timer. */
+ timerval.it_interval.tv_sec = 0;
+ timerval.it_interval.tv_usec = 0;
+ timerval.it_value.tv_sec = 0;
+ timerval.it_value.tv_usec = 0;
+ setitimer (ITIMER_REAL, &timerval, NULL);
+
+ /* And disable the signal handler. */
+ action.sa_handler = SIG_IGN;
+ sigaction (SIGALRM, &action, NULL);
+ }
+
+ if (query)
+ notmuch_query_destroy (query);
+
+ talloc_free (local);
+ return status;
+}
+
+notmuch_status_t
+notmuch_database_begin_atomic (notmuch_database_t *notmuch)
+{
+ if (notmuch->mode == NOTMUCH_DATABASE_MODE_READ_ONLY ||
+ notmuch->atomic_nesting > 0)
+ goto DONE;
+
+ if (notmuch_database_needs_upgrade(notmuch))
+ return NOTMUCH_STATUS_UPGRADE_REQUIRED;
+
+ try {
+ (static_cast <Xapian::WritableDatabase *> (notmuch->xapian_db))->begin_transaction (false);
+ } catch (const Xapian::Error &error) {
+ _notmuch_database_log (notmuch, "A Xapian exception occurred beginning transaction: %s.\n",
+ error.get_msg().c_str());
+ notmuch->exception_reported = TRUE;
+ return NOTMUCH_STATUS_XAPIAN_EXCEPTION;
+ }
+
+DONE:
+ notmuch->atomic_nesting++;
+ return NOTMUCH_STATUS_SUCCESS;
+}
+
+notmuch_status_t
+notmuch_database_end_atomic (notmuch_database_t *notmuch)
+{
+ Xapian::WritableDatabase *db;
+
+ if (notmuch->atomic_nesting == 0)
+ return NOTMUCH_STATUS_UNBALANCED_ATOMIC;
+
+ if (notmuch->mode == NOTMUCH_DATABASE_MODE_READ_ONLY ||
+ notmuch->atomic_nesting > 1)
+ goto DONE;
+
+ db = static_cast <Xapian::WritableDatabase *> (notmuch->xapian_db);
+ try {
+ db->commit_transaction ();
+
+ /* This is a hack for testing. Xapian never flushes on a
+ * non-flushed commit, even if the flush threshold is 1.
+ * However, we rely on flushing to test atomicity. */
+ const char *thresh = getenv ("XAPIAN_FLUSH_THRESHOLD");
+ if (thresh && atoi (thresh) == 1)
+ db->flush ();
+ } catch (const Xapian::Error &error) {
+ _notmuch_database_log (notmuch, "A Xapian exception occurred committing transaction: %s.\n",
+ error.get_msg().c_str());
+ notmuch->exception_reported = TRUE;
+ return NOTMUCH_STATUS_XAPIAN_EXCEPTION;
+ }
+
+ if (notmuch->atomic_dirty) {
+ ++notmuch->revision;
+ notmuch->atomic_dirty = FALSE;
+ }
+
+DONE:
+ notmuch->atomic_nesting--;
+ return NOTMUCH_STATUS_SUCCESS;
+}
+
+unsigned long
+notmuch_database_get_revision (notmuch_database_t *notmuch,
+ const char **uuid)
+{
+ if (uuid)
+ *uuid = notmuch->uuid;
+ return notmuch->revision;
+}
+
+/* We allow the user to use arbitrarily long paths for directories. But
+ * we have a term-length limit. So if we exceed that, we'll use the
+ * SHA-1 of the path for the database term.
+ *
+ * Note: This function may return the original value of 'path'. If it
+ * does not, then the caller is responsible to free() the returned
+ * value.
+ */
+const char *
+_notmuch_database_get_directory_db_path (const char *path)
+{
+ int term_len = strlen (_find_prefix ("directory")) + strlen (path);
+
+ if (term_len > NOTMUCH_TERM_MAX)
+ return _notmuch_sha1_of_string (path);
+ else
+ return path;
+}
+
+/* Given a path, split it into two parts: the directory part is all
+ * components except for the last, and the basename is that last
+ * component. Getting the return-value for either part is optional
+ * (the caller can pass NULL).
+ *
+ * The original 'path' can represent either a regular file or a
+ * directory---the splitting will be carried out in the same way in
+ * either case. Trailing slashes on 'path' will be ignored, and any
+ * cases of multiple '/' characters appearing in series will be
+ * treated as a single '/'.
+ *
+ * Allocation (if any) will have 'ctx' as the talloc owner. But
+ * pointers will be returned within the original path string whenever
+ * possible.
+ *
+ * Note: If 'path' is non-empty and contains no non-trailing slash,
+ * (that is, consists of a filename with no parent directory), then
+ * the directory returned will be an empty string. However, if 'path'
+ * is an empty string, then both directory and basename will be
+ * returned as NULL.
+ */
+notmuch_status_t
+_notmuch_database_split_path (void *ctx,
+ const char *path,
+ const char **directory,
+ const char **basename)
+{
+ const char *slash;
+
+ if (path == NULL || *path == '\0') {
+ if (directory)
+ *directory = NULL;
+ if (basename)
+ *basename = NULL;
+ return NOTMUCH_STATUS_SUCCESS;
+ }
+
+ /* Find the last slash (not counting a trailing slash), if any. */
+
+ slash = path + strlen (path) - 1;
+
+ /* First, skip trailing slashes. */
+ while (slash != path) {
+ if (*slash != '/')
+ break;
+
+ --slash;
+ }
+
+ /* Then, find a slash. */
+ while (slash != path) {
+ if (*slash == '/')
+ break;
+
+ if (basename)
+ *basename = slash;
+
+ --slash;
+ }
+
+ /* Finally, skip multiple slashes. */
+ while (slash != path) {
+ if (*(slash - 1) != '/')
+ break;
+
+ --slash;
+ }
+
+ if (slash == path) {
+ if (directory)
+ *directory = talloc_strdup (ctx, "");
+ if (basename)
+ *basename = path;
+ } else {
+ if (directory)
+ *directory = talloc_strndup (ctx, path, slash - path);
+ }
+
+ return NOTMUCH_STATUS_SUCCESS;
+}
+
+/* Find the document ID of the specified directory.
+ *
+ * If (flags & NOTMUCH_FIND_CREATE), a new directory document will be
+ * created if one does not exist for 'path'. Otherwise, if the
+ * directory document does not exist, this sets *directory_id to
+ * ((unsigned int)-1) and returns NOTMUCH_STATUS_SUCCESS.
+ */
+notmuch_status_t
+_notmuch_database_find_directory_id (notmuch_database_t *notmuch,
+ const char *path,
+ notmuch_find_flags_t flags,
+ unsigned int *directory_id)
+{
+ notmuch_directory_t *directory;
+ notmuch_status_t status;
+
+ if (path == NULL) {
+ *directory_id = 0;
+ return NOTMUCH_STATUS_SUCCESS;
+ }
+
+ directory = _notmuch_directory_create (notmuch, path, flags, &status);
+ if (status || !directory) {
+ *directory_id = -1;
+ return status;
+ }
+
+ *directory_id = _notmuch_directory_get_document_id (directory);
+
+ notmuch_directory_destroy (directory);
+
+ return NOTMUCH_STATUS_SUCCESS;
+}
+
+const char *
+_notmuch_database_get_directory_path (void *ctx,
+ notmuch_database_t *notmuch,
+ unsigned int doc_id)
+{
+ Xapian::Document document;
+
+ document = find_document_for_doc_id (notmuch, doc_id);
+
+ return talloc_strdup (ctx, document.get_data ().c_str ());
+}
+
+/* Given a legal 'filename' for the database, (either relative to
+ * database path or absolute with initial components identical to
+ * database path), return a new string (with 'ctx' as the talloc
+ * owner) suitable for use as a direntry term value.
+ *
+ * If (flags & NOTMUCH_FIND_CREATE), the necessary directory documents
+ * will be created in the database as needed. Otherwise, if the
+ * necessary directory documents do not exist, this sets
+ * *direntry to NULL and returns NOTMUCH_STATUS_SUCCESS.
+ */
+notmuch_status_t
+_notmuch_database_filename_to_direntry (void *ctx,
+ notmuch_database_t *notmuch,
+ const char *filename,
+ notmuch_find_flags_t flags,
+ char **direntry)
+{
+ const char *relative, *directory, *basename;
+ Xapian::docid directory_id;
+ notmuch_status_t status;
+
+ relative = _notmuch_database_relative_path (notmuch, filename);
+
+ status = _notmuch_database_split_path (ctx, relative,
+ &directory, &basename);
+ if (status)
+ return status;
+
+ status = _notmuch_database_find_directory_id (notmuch, directory, flags,
+ &directory_id);
+ if (status || directory_id == (unsigned int)-1) {
+ *direntry = NULL;
+ return status;
+ }
+
+ *direntry = talloc_asprintf (ctx, "%u:%s", directory_id, basename);
+
+ return NOTMUCH_STATUS_SUCCESS;
+}
+
+/* Given a legal 'path' for the database, return the relative path.
+ *
+ * The return value will be a pointer to the original path contents,
+ * and will be either the original string (if 'path' was relative) or
+ * a portion of the string (if path was absolute and begins with the
+ * database path).
+ */
+const char *
+_notmuch_database_relative_path (notmuch_database_t *notmuch,
+ const char *path)
+{
+ const char *db_path, *relative;
+ unsigned int db_path_len;
+
+ db_path = notmuch_database_get_path (notmuch);
+ db_path_len = strlen (db_path);
+
+ relative = path;
+
+ if (*relative == '/') {
+ while (*relative == '/' && *(relative+1) == '/')
+ relative++;
+
+ if (strncmp (relative, db_path, db_path_len) == 0)
+ {
+ relative += db_path_len;
+ while (*relative == '/')
+ relative++;
+ }
+ }
+
+ return relative;
+}
+
+notmuch_status_t
+notmuch_database_get_directory (notmuch_database_t *notmuch,
+ const char *path,
+ notmuch_directory_t **directory)
+{
+ notmuch_status_t status;
+
+ if (directory == NULL)
+ return NOTMUCH_STATUS_NULL_POINTER;
+ *directory = NULL;
+
+ try {
+ *directory = _notmuch_directory_create (notmuch, path,
+ NOTMUCH_FIND_LOOKUP, &status);
+ } catch (const Xapian::Error &error) {
+ _notmuch_database_log (notmuch, "A Xapian exception occurred getting directory: %s.\n",
+ error.get_msg().c_str());
+ notmuch->exception_reported = TRUE;
+ status = NOTMUCH_STATUS_XAPIAN_EXCEPTION;
+ }
+ return status;
+}
+
+/* Allocate a document ID that satisfies the following criteria:
*
- * Returns NULL if no message with message ID 'message_id' is in the
- * database.
+ * 1. The ID does not exist for any document in the Xapian database
*
- * Otherwise, returns a newly talloced string belonging to 'ctx'.
+ * 2. The ID was not previously returned from this function
+ *
+ * 3. The ID is the smallest integer satisfying (1) and (2)
+ *
+ * This function will trigger an internal error if these constraints
+ * cannot all be satisfied, (that is, the pool of available document
+ * IDs has been exhausted).
*/
+unsigned int
+_notmuch_database_generate_doc_id (notmuch_database_t *notmuch)
+{
+ assert (notmuch->last_doc_id >= notmuch->xapian_db->get_lastdocid ());
+
+ notmuch->last_doc_id++;
+
+ if (notmuch->last_doc_id == 0)
+ INTERNAL_ERROR ("Xapian document IDs are exhausted.\n");
+
+ return notmuch->last_doc_id;
+}
+
static const char *
+_notmuch_database_generate_thread_id (notmuch_database_t *notmuch)
+{
+ /* 16 bytes (+ terminator) for hexadecimal representation of
+ * a 64-bit integer. */
+ static char thread_id[17];
+ Xapian::WritableDatabase *db;
+
+ db = static_cast <Xapian::WritableDatabase *> (notmuch->xapian_db);
+
+ notmuch->last_thread_id++;
+
+ sprintf (thread_id, "%016" PRIx64, notmuch->last_thread_id);
+
+ db->set_metadata ("last_thread_id", thread_id);
+
+ return thread_id;
+}
+
+static char *
+_get_metadata_thread_id_key (void *ctx, const char *message_id)
+{
+ if (strlen (message_id) > NOTMUCH_MESSAGE_ID_MAX)
+ message_id = _notmuch_message_id_compressed (ctx, message_id);
+
+ return talloc_asprintf (ctx, NOTMUCH_METADATA_THREAD_ID_PREFIX "%s",
+ message_id);
+}
+
+static notmuch_status_t
+_resolve_message_id_to_thread_id_old (notmuch_database_t *notmuch,
+ void *ctx,
+ const char *message_id,
+ const char **thread_id_ret);
+
+/* Find the thread ID to which the message with 'message_id' belongs.
+ *
+ * Note: 'thread_id_ret' must not be NULL!
+ * On success '*thread_id_ret' is set to a newly talloced string belonging to
+ * 'ctx'.
+ *
+ * Note: If there is no message in the database with the given
+ * 'message_id' then a new thread_id will be allocated for this
+ * message ID and stored in the database metadata so that the
+ * thread ID can be looked up if the message is added to the database
+ * later.
+ */
+static notmuch_status_t
_resolve_message_id_to_thread_id (notmuch_database_t *notmuch,
void *ctx,
- const char *message_id)
+ const char *message_id,
+ const char **thread_id_ret)
{
+ notmuch_private_status_t status;
notmuch_message_t *message;
- const char *ret = NULL;
- message = notmuch_database_find_message (notmuch, message_id);
- if (message == NULL)
- goto DONE;
+ if (! (notmuch->features & NOTMUCH_FEATURE_GHOSTS))
+ return _resolve_message_id_to_thread_id_old (notmuch, ctx, message_id,
+ thread_id_ret);
+
+ /* Look for this message (regular or ghost) */
+ message = _notmuch_message_create_for_message_id (
+ notmuch, message_id, &status);
+ if (status == NOTMUCH_PRIVATE_STATUS_SUCCESS) {
+ /* Message exists */
+ *thread_id_ret = talloc_steal (
+ ctx, notmuch_message_get_thread_id (message));
+ } else if (status == NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND) {
+ /* Message did not exist. Give it a fresh thread ID and
+ * populate this message as a ghost message. */
+ *thread_id_ret = talloc_strdup (
+ ctx, _notmuch_database_generate_thread_id (notmuch));
+ if (! *thread_id_ret) {
+ status = NOTMUCH_PRIVATE_STATUS_OUT_OF_MEMORY;
+ } else {
+ status = _notmuch_message_initialize_ghost (message, *thread_id_ret);
+ if (status == 0)
+ /* Commit the new ghost message */
+ _notmuch_message_sync (message);
+ }
+ } else {
+ /* Create failed. Fall through. */
+ }
- ret = talloc_steal (ctx, notmuch_message_get_thread_id (message));
+ notmuch_message_destroy (message);
+
+ return COERCE_STATUS (status, "Error creating ghost message");
+}
+
+/* Pre-ghost messages _resolve_message_id_to_thread_id */
+static notmuch_status_t
+_resolve_message_id_to_thread_id_old (notmuch_database_t *notmuch,
+ void *ctx,
+ const char *message_id,
+ const char **thread_id_ret)
+{
+ notmuch_status_t status;
+ notmuch_message_t *message;
+ string thread_id_string;
+ char *metadata_key;
+ Xapian::WritableDatabase *db;
+
+ status = notmuch_database_find_message (notmuch, message_id, &message);
+
+ if (status)
+ return status;
+
+ if (message) {
+ *thread_id_ret = talloc_steal (ctx,
+ notmuch_message_get_thread_id (message));
- DONE:
- if (message)
notmuch_message_destroy (message);
- return ret;
+ return NOTMUCH_STATUS_SUCCESS;
+ }
+
+ /* Message has not been seen yet.
+ *
+ * We may have seen a reference to it already, in which case, we
+ * can return the thread ID stored in the metadata. Otherwise, we
+ * generate a new thread ID and store it there.
+ */
+ db = static_cast <Xapian::WritableDatabase *> (notmuch->xapian_db);
+ metadata_key = _get_metadata_thread_id_key (ctx, message_id);
+ thread_id_string = notmuch->xapian_db->get_metadata (metadata_key);
+
+ if (thread_id_string.empty()) {
+ *thread_id_ret = talloc_strdup (ctx,
+ _notmuch_database_generate_thread_id (notmuch));
+ db->set_metadata (metadata_key, *thread_id_ret);
+ } else {
+ *thread_id_ret = talloc_strdup (ctx, thread_id_string.c_str());
+ }
+
+ talloc_free (metadata_key);
+
+ return NOTMUCH_STATUS_SUCCESS;
}
static notmuch_status_t
const char **thread_id)
{
GHashTable *parents = NULL;
- const char *refs, *in_reply_to;
+ const char *refs, *in_reply_to, *in_reply_to_message_id;
+ const char *last_ref_message_id, *this_message_id;
GList *l, *keys = NULL;
notmuch_status_t ret = NOTMUCH_STATUS_SUCCESS;
parents = g_hash_table_new_full (g_str_hash, g_str_equal,
_my_talloc_free_for_g_hash, NULL);
-
- refs = notmuch_message_file_get_header (message_file, "references");
- parse_references (message, parents, refs);
-
- in_reply_to = notmuch_message_file_get_header (message_file, "in-reply-to");
- parse_references (message, parents, in_reply_to);
- _notmuch_message_add_term (message, "replyto",
- _parse_message_id (message, in_reply_to, NULL));
+ this_message_id = notmuch_message_get_message_id (message);
+
+ refs = _notmuch_message_file_get_header (message_file, "references");
+ last_ref_message_id = parse_references (message,
+ this_message_id,
+ parents, refs);
+
+ in_reply_to = _notmuch_message_file_get_header (message_file, "in-reply-to");
+ in_reply_to_message_id = parse_references (message,
+ this_message_id,
+ parents, in_reply_to);
+
+ /* For the parent of this message, use the last message ID of the
+ * References header, if available. If not, fall back to the
+ * first message ID in the In-Reply-To header. */
+ if (last_ref_message_id) {
+ _notmuch_message_add_term (message, "replyto",
+ last_ref_message_id);
+ } else if (in_reply_to_message_id) {
+ _notmuch_message_add_term (message, "replyto",
+ in_reply_to_message_id);
+ }
keys = g_hash_table_get_keys (parents);
for (l = keys; l; l = l->next) {
char *parent_message_id;
- const char *parent_thread_id;
+ const char *parent_thread_id = NULL;
parent_message_id = (char *) l->data;
- parent_thread_id = _resolve_message_id_to_thread_id (notmuch,
- message,
- parent_message_id);
- if (parent_thread_id == NULL) {
- _notmuch_message_add_term (message, "ref", parent_message_id);
- } else {
- if (*thread_id == NULL) {
- *thread_id = talloc_strdup (message, parent_thread_id);
- _notmuch_message_add_term (message, "thread", *thread_id);
- } else if (strcmp (*thread_id, parent_thread_id)) {
- ret = _merge_threads (notmuch, *thread_id, parent_thread_id);
- if (ret)
- goto DONE;
- }
+ _notmuch_message_add_term (message, "reference",
+ parent_message_id);
+
+ ret = _resolve_message_id_to_thread_id (notmuch,
+ message,
+ parent_message_id,
+ &parent_thread_id);
+ if (ret)
+ goto DONE;
+
+ if (*thread_id == NULL) {
+ *thread_id = talloc_strdup (message, parent_thread_id);
+ _notmuch_message_add_term (message, "thread", *thread_id);
+ } else if (strcmp (*thread_id, parent_thread_id)) {
+ ret = _merge_threads (notmuch, *thread_id, parent_thread_id);
+ if (ret)
+ goto DONE;
}
}
notmuch_status_t ret = NOTMUCH_STATUS_SUCCESS;
notmuch_private_status_t private_status;
- find_doc_ids (notmuch, "ref", message_id, &child, &children_end);
+ find_doc_ids (notmuch, "reference", message_id, &child, &children_end);
for ( ; child != children_end; child++) {
*thread_id = talloc_strdup (message, child_thread_id);
_notmuch_message_add_term (message, "thread", *thread_id);
} else if (strcmp (*thread_id, child_thread_id)) {
- _notmuch_message_remove_term (child_message, "ref",
+ _notmuch_message_remove_term (child_message, "reference",
message_id);
_notmuch_message_sync (child_message);
ret = _merge_threads (notmuch, *thread_id, child_thread_id);
return ret;
}
-/* Given a (mostly empty) 'message' and its corresponding
+/* Fetch and clear the stored thread_id for message, or NULL if none. */
+static char *
+_consume_metadata_thread_id (void *ctx, notmuch_database_t *notmuch,
+ notmuch_message_t *message)
+{
+ const char *message_id;
+ string stored_id;
+ char *metadata_key;
+
+ message_id = notmuch_message_get_message_id (message);
+ metadata_key = _get_metadata_thread_id_key (ctx, message_id);
+
+ /* Check if we have already seen related messages to this one.
+ * If we have then use the thread_id that we stored at that time.
+ */
+ stored_id = notmuch->xapian_db->get_metadata (metadata_key);
+ if (stored_id.empty ()) {
+ return NULL;
+ } else {
+ Xapian::WritableDatabase *db;
+
+ db = static_cast <Xapian::WritableDatabase *> (notmuch->xapian_db);
+
+ /* Clear the metadata for this message ID. We don't need it
+ * anymore. */
+ db->set_metadata (metadata_key, "");
+
+ return talloc_strdup (ctx, stored_id.c_str ());
+ }
+}
+
+/* Given a blank or ghost 'message' and its corresponding
* 'message_file' link it to existing threads in the database.
*
- * We first look at 'message_file' and its link-relevant headers
- * (References and In-Reply-To) for message IDs. We also look in the
- * database for existing message that reference 'message'.p
+ * First, if is_ghost, this retrieves the thread ID already stored in
+ * the message (which will be the case if a message was previously
+ * added that referenced this one). If the message is blank
+ * (!is_ghost), it doesn't have a thread ID yet (we'll generate one
+ * later in this function). If the database does not support ghost
+ * messages, this checks for a thread ID stored in database metadata
+ * for this message ID.
*
- * The end result is to call _notmuch_message_add_thread_id with one
- * or more thread IDs to which this message belongs, (including
- * generating a new thread ID if necessary if the message doesn't
- * connect to any existing threads).
+ * Second, we look at 'message_file' and its link-relevant headers
+ * (References and In-Reply-To) for message IDs.
+ *
+ * Finally, we look in the database for existing message that
+ * reference 'message'.
+ *
+ * In all cases, we assign to the current message the first thread ID
+ * found. We will also merge any existing, distinct threads where this
+ * message belongs to both, (which is not uncommon when messages are
+ * processed out of order).
+ *
+ * Finally, if no thread ID has been found through referenced messages, we
+ * call _notmuch_message_generate_thread_id to generate a new thread
+ * ID. This should only happen for new, top-level messages, (no
+ * References or In-Reply-To header in this message, and no previously
+ * added message refers to this message).
*/
static notmuch_status_t
_notmuch_database_link_message (notmuch_database_t *notmuch,
notmuch_message_t *message,
- notmuch_message_file_t *message_file)
+ notmuch_message_file_t *message_file,
+ notmuch_bool_t is_ghost)
{
+ void *local = talloc_new (NULL);
notmuch_status_t status;
const char *thread_id = NULL;
+ /* Check if the message already had a thread ID */
+ if (notmuch->features & NOTMUCH_FEATURE_GHOSTS) {
+ if (is_ghost)
+ thread_id = notmuch_message_get_thread_id (message);
+ } else {
+ thread_id = _consume_metadata_thread_id (local, notmuch, message);
+ if (thread_id)
+ _notmuch_message_add_term (message, "thread", thread_id);
+ }
+
status = _notmuch_database_link_message_to_parents (notmuch, message,
message_file,
&thread_id);
if (status)
- return status;
+ goto DONE;
- status = _notmuch_database_link_message_to_children (notmuch, message,
- &thread_id);
- if (status)
- return status;
+ if (! (notmuch->features & NOTMUCH_FEATURE_GHOSTS)) {
+ /* In general, it shouldn't be necessary to link children,
+ * since the earlier indexing of those children will have
+ * stored a thread ID for the missing parent. However, prior
+ * to ghost messages, these stored thread IDs were NOT
+ * rewritten during thread merging (and there was no
+ * performant way to do so), so if indexed children were
+ * pulled into a different thread ID by a merge, it was
+ * necessary to pull them *back* into the stored thread ID of
+ * the parent. With ghost messages, we just rewrite the
+ * stored thread IDs during merging, so this workaround isn't
+ * necessary. */
+ status = _notmuch_database_link_message_to_children (notmuch, message,
+ &thread_id);
+ if (status)
+ goto DONE;
+ }
- if (thread_id == NULL)
- _notmuch_message_ensure_thread_id (message);
+ /* If not part of any existing thread, generate a new thread ID. */
+ if (thread_id == NULL) {
+ thread_id = _notmuch_database_generate_thread_id (notmuch);
- return NOTMUCH_STATUS_SUCCESS;
+ _notmuch_message_add_term (message, "thread", thread_id);
+ }
+
+ DONE:
+ talloc_free (local);
+
+ return status;
}
notmuch_status_t
{
notmuch_message_file_t *message_file;
notmuch_message_t *message = NULL;
- notmuch_status_t ret = NOTMUCH_STATUS_SUCCESS;
+ notmuch_status_t ret = NOTMUCH_STATUS_SUCCESS, ret2;
notmuch_private_status_t private_status;
+ notmuch_bool_t is_ghost = false;
const char *date, *header;
const char *from, *to, *subject;
- char *message_id;
+ char *message_id = NULL;
if (message_ret)
*message_ret = NULL;
- message_file = notmuch_message_file_open (filename);
- if (message_file == NULL) {
- ret = NOTMUCH_STATUS_FILE_ERROR;
+ ret = _notmuch_database_ensure_writable (notmuch);
+ if (ret)
+ return ret;
+
+ message_file = _notmuch_message_file_open (notmuch, filename);
+ if (message_file == NULL)
+ return NOTMUCH_STATUS_FILE_ERROR;
+
+ /* Adding a message may change many documents. Do this all
+ * atomically. */
+ ret = notmuch_database_begin_atomic (notmuch);
+ if (ret)
goto DONE;
- }
- notmuch_message_file_restrict_headers (message_file,
- "date",
- "from",
- "in-reply-to",
- "message-id",
- "references",
- "subject",
- "to",
- (char *) NULL);
+ /* Parse message up front to get better error status. */
+ ret = _notmuch_message_file_parse (message_file);
+ if (ret)
+ goto DONE;
try {
/* Before we do any real work, (especially before doing a
* let's make sure that what we're looking at looks like an
* actual email message.
*/
- from = notmuch_message_file_get_header (message_file, "from");
- subject = notmuch_message_file_get_header (message_file, "subject");
- to = notmuch_message_file_get_header (message_file, "to");
+ from = _notmuch_message_file_get_header (message_file, "from");
+ subject = _notmuch_message_file_get_header (message_file, "subject");
+ to = _notmuch_message_file_get_header (message_file, "to");
- if (from == NULL &&
- subject == NULL &&
- to == NULL)
+ if ((from == NULL || *from == '\0') &&
+ (subject == NULL || *subject == '\0') &&
+ (to == NULL || *to == '\0'))
{
ret = NOTMUCH_STATUS_FILE_NOT_EMAIL;
goto DONE;
/* Now that we're sure it's mail, the first order of business
* is to find a message ID (or else create one ourselves). */
- header = notmuch_message_file_get_header (message_file, "message-id");
- if (header) {
+ header = _notmuch_message_file_get_header (message_file, "message-id");
+ if (header && *header != '\0') {
message_id = _parse_message_id (message_file, header, NULL);
+
/* So the header value isn't RFC-compliant, but it's
* better than no message-id at all. */
if (message_id == NULL)
message_id = talloc_strdup (message_file, header);
- } else {
+ }
+
+ if (message_id == NULL ) {
/* No message-id at all, let's generate one by taking a
* hash over the file's contents. */
- char *sha1 = notmuch_sha1_of_file (filename);
+ char *sha1 = _notmuch_sha1_of_file (filename);
/* If that failed too, something is really wrong. Give up. */
if (sha1 == NULL) {
* (which may or may not reference an existing document in the
* database). */
- message = _notmuch_message_create_for_message_id (database,
- notmuch,
+ message = _notmuch_message_create_for_message_id (notmuch,
message_id,
&private_status);
talloc_free (message_id);
- if (message == NULL)
+ if (message == NULL) {
+ ret = COERCE_STATUS (private_status,
+ "Unexpected status value from _notmuch_message_create_for_message_id");
goto DONE;
+ }
+
+ _notmuch_message_add_filename (message, filename);
- /* Is this a newly created message object? */
- if (private_status == NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND) {
- _notmuch_message_set_filename (message, filename);
+ /* Is this a newly created message object or a ghost
+ * message? We have to be slightly careful: if this is a
+ * blank message, it's not safe to call
+ * notmuch_message_get_flag yet. */
+ if (private_status == NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND ||
+ (is_ghost = notmuch_message_get_flag (
+ message, NOTMUCH_MESSAGE_FLAG_GHOST))) {
_notmuch_message_add_term (message, "type", "mail");
- } else {
- ret = NOTMUCH_STATUS_DUPLICATE_MESSAGE_ID;
- goto DONE;
- }
+ if (is_ghost)
+ /* Convert ghost message to a regular message */
+ _notmuch_message_remove_term (message, "type", "ghost");
- ret = _notmuch_database_link_message (notmuch, message, message_file);
- if (ret)
- goto DONE;
+ ret = _notmuch_database_link_message (notmuch, message,
+ message_file, is_ghost);
+ if (ret)
+ goto DONE;
- date = notmuch_message_file_get_header (message_file, "date");
- _notmuch_message_set_date (message, date);
+ date = _notmuch_message_file_get_header (message_file, "date");
+ _notmuch_message_set_header_values (message, date, from, subject);
- _notmuch_message_index_file (message, filename);
+ ret = _notmuch_message_index_file (message, message_file);
+ if (ret)
+ goto DONE;
+ } else {
+ ret = NOTMUCH_STATUS_DUPLICATE_MESSAGE_ID;
+ }
_notmuch_message_sync (message);
} catch (const Xapian::Error &error) {
- fprintf (stderr, "A Xapian exception occurred: %s.\n",
+ _notmuch_database_log (notmuch, "A Xapian exception occurred adding message: %s.\n",
error.get_msg().c_str());
+ notmuch->exception_reported = TRUE;
ret = NOTMUCH_STATUS_XAPIAN_EXCEPTION;
goto DONE;
}
DONE:
if (message) {
- if (ret == NOTMUCH_STATUS_SUCCESS && message_ret)
+ if ((ret == NOTMUCH_STATUS_SUCCESS ||
+ ret == NOTMUCH_STATUS_DUPLICATE_MESSAGE_ID) && message_ret)
*message_ret = message;
else
notmuch_message_destroy (message);
}
if (message_file)
- notmuch_message_file_close (message_file);
+ _notmuch_message_file_close (message_file);
+
+ ret2 = notmuch_database_end_atomic (notmuch);
+ if ((ret == NOTMUCH_STATUS_SUCCESS ||
+ ret == NOTMUCH_STATUS_DUPLICATE_MESSAGE_ID) &&
+ ret2 != NOTMUCH_STATUS_SUCCESS)
+ ret = ret2;
return ret;
}
+
+notmuch_status_t
+notmuch_database_remove_message (notmuch_database_t *notmuch,
+ const char *filename)
+{
+ notmuch_status_t status;
+ notmuch_message_t *message;
+
+ status = notmuch_database_find_message_by_filename (notmuch, filename,
+ &message);
+
+ if (status == NOTMUCH_STATUS_SUCCESS && message) {
+ status = _notmuch_message_remove_filename (message, filename);
+ if (status == NOTMUCH_STATUS_SUCCESS)
+ _notmuch_message_delete (message);
+ else if (status == NOTMUCH_STATUS_DUPLICATE_MESSAGE_ID)
+ _notmuch_message_sync (message);
+
+ notmuch_message_destroy (message);
+ }
+
+ return status;
+}
+
+notmuch_status_t
+notmuch_database_find_message_by_filename (notmuch_database_t *notmuch,
+ const char *filename,
+ notmuch_message_t **message_ret)
+{
+ void *local;
+ const char *prefix = _find_prefix ("file-direntry");
+ char *direntry, *term;
+ Xapian::PostingIterator i, end;
+ notmuch_status_t status;
+
+ if (message_ret == NULL)
+ return NOTMUCH_STATUS_NULL_POINTER;
+
+ if (! (notmuch->features & NOTMUCH_FEATURE_FILE_TERMS))
+ return NOTMUCH_STATUS_UPGRADE_REQUIRED;
+
+ /* return NULL on any failure */
+ *message_ret = NULL;
+
+ local = talloc_new (notmuch);
+
+ try {
+ status = _notmuch_database_filename_to_direntry (
+ local, notmuch, filename, NOTMUCH_FIND_LOOKUP, &direntry);
+ if (status || !direntry)
+ goto DONE;
+
+ term = talloc_asprintf (local, "%s%s", prefix, direntry);
+
+ find_doc_ids_for_term (notmuch, term, &i, &end);
+
+ if (i != end) {
+ notmuch_private_status_t private_status;
+
+ *message_ret = _notmuch_message_create (notmuch, notmuch, *i,
+ &private_status);
+ if (*message_ret == NULL)
+ status = NOTMUCH_STATUS_OUT_OF_MEMORY;
+ }
+ } catch (const Xapian::Error &error) {
+ _notmuch_database_log (notmuch, "Error: A Xapian exception occurred finding message by filename: %s\n",
+ error.get_msg().c_str());
+ notmuch->exception_reported = TRUE;
+ status = NOTMUCH_STATUS_XAPIAN_EXCEPTION;
+ }
+
+ DONE:
+ talloc_free (local);
+
+ if (status && *message_ret) {
+ notmuch_message_destroy (*message_ret);
+ *message_ret = NULL;
+ }
+ return status;
+}
+
+notmuch_string_list_t *
+_notmuch_database_get_terms_with_prefix (void *ctx, Xapian::TermIterator &i,
+ Xapian::TermIterator &end,
+ const char *prefix)
+{
+ int prefix_len = strlen (prefix);
+ notmuch_string_list_t *list;
+
+ list = _notmuch_string_list_create (ctx);
+ if (unlikely (list == NULL))
+ return NULL;
+
+ for (i.skip_to (prefix); i != end; i++) {
+ /* Terminate loop at first term without desired prefix. */
+ if (strncmp ((*i).c_str (), prefix, prefix_len))
+ break;
+
+ _notmuch_string_list_append (list, (*i).c_str () + prefix_len);
+ }
+
+ return list;
+}
+
+notmuch_tags_t *
+notmuch_database_get_all_tags (notmuch_database_t *db)
+{
+ Xapian::TermIterator i, end;
+ notmuch_string_list_t *tags;
+
+ try {
+ i = db->xapian_db->allterms_begin();
+ end = db->xapian_db->allterms_end();
+ tags = _notmuch_database_get_terms_with_prefix (db, i, end,
+ _find_prefix ("tag"));
+ _notmuch_string_list_sort (tags);
+ return _notmuch_tags_create (db, tags);
+ } catch (const Xapian::Error &error) {
+ _notmuch_database_log (db, "A Xapian exception occurred getting tags: %s.\n",
+ error.get_msg().c_str());
+ db->exception_reported = TRUE;
+ return NULL;
+ }
+}
+
+const char *
+notmuch_database_status_string (const notmuch_database_t *notmuch)
+{
+ return notmuch->status_string;
+}
projects / notmuch / blobdiff