lib: support reopening databases for write access.

In the future Xapian will apparently support this more conveniently
for the cases other than READ_ONLY => READ_ONLY

Conceptually this function seems to fit better in lib/open.cc;
database.cc is still large enough that moving the function makes
sense.

1 files changed, 125 insertions, 0 deletions

diff --git a/test/T595-reopen.sh b/test/T595-reopen.sh
new file mode 100755
index 00000000..7375e2ac
--- /dev/null
+++ b/test/T595-reopen.sh
@@ -0,0 +1,125 @@
+#!/usr/bin/env bash
+test_description="library reopen API"
+
+. $(dirname "$0")/test-lib.sh || exit 1
+
+add_email_corpus
+
+cat <<EOF > c_head
+#include <string.h>
+#include <stdlib.h>
+#include <notmuch-test.h>
+
+int main (int argc, char** argv)
+{
+   notmuch_database_t *db;
+   char *val;
+   notmuch_status_t stat;
+   notmuch_database_mode_t mode = NOTMUCH_DATABASE_MODE_READ_ONLY;
+
+   char *msg = NULL;
+
+   for (int i = 1; i < argc; i++)
+      if (strcmp (argv[i], "%NULL%") == 0) argv[i] = NULL;
+
+   if (argv[2] && (argv[2][0] == 'w' || argv[2][0] == 'W'))
+     mode = NOTMUCH_DATABASE_MODE_READ_WRITE;
+
+   stat = notmuch_database_open_with_config (argv[1],
+					     mode,
+					     argv[3],
+					     argv[4],
+					     &db,
+					     &msg);
+   if (stat != NOTMUCH_STATUS_SUCCESS) {
+     fprintf (stderr, "error opening database: %d %s\n", stat, msg ? msg : "");
+     exit (1);
+   }
+EOF
+
+cat <<EOF > c_tail
+   EXPECT0(notmuch_database_destroy(db));
+}
+EOF
+
+# The sequence of tests is important here
+
+test_begin_subtest "notmuch_database_reopen (read=>write)"
+cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR} read ${NOTMUCH_CONFIG}
+{
+   EXPECT0(notmuch_database_reopen (db, NOTMUCH_DATABASE_MODE_READ_WRITE));
+   EXPECT0(notmuch_database_set_config (db, "test.key1", "testvalue1"));
+   EXPECT0(notmuch_database_set_config (db, "test.key2", "testvalue2"));
+   EXPECT0(notmuch_database_get_config (db, "test.key1", &val));
+   printf("test.key1 = %s\n", val);
+   EXPECT0(notmuch_database_get_config (db, "test.key2", &val));
+   printf("test.key2 = %s\n", val);
+}
+EOF
+cat <<'EOF' >EXPECTED
+== stdout ==
+test.key1 = testvalue1
+test.key2 = testvalue2
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "notmuch_database_reopen (read=>read)"
+cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR} read ${NOTMUCH_CONFIG}
+{
+   EXPECT0(notmuch_database_reopen (db, NOTMUCH_DATABASE_MODE_READ_ONLY));
+   EXPECT0(notmuch_database_get_config (db, "test.key1", &val));
+   printf("test.key1 = %s\n", val);
+   EXPECT0(notmuch_database_get_config (db, "test.key2", &val));
+   printf("test.key2 = %s\n", val);
+}
+EOF
+cat <<'EOF' >EXPECTED
+== stdout ==
+test.key1 = testvalue1
+test.key2 = testvalue2
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "notmuch_database_reopen (write=>read)"
+cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR} write ${NOTMUCH_CONFIG}
+{
+   EXPECT0(notmuch_database_reopen (db, NOTMUCH_DATABASE_MODE_READ_ONLY));
+   EXPECT0(notmuch_database_get_config (db, "test.key1", &val));
+   printf("test.key1 = %s\n", val);
+   EXPECT0(notmuch_database_get_config (db, "test.key2", &val));
+   printf("test.key2 = %s\n", val);
+}
+EOF
+cat <<'EOF' >EXPECTED
+== stdout ==
+test.key1 = testvalue1
+test.key2 = testvalue2
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "notmuch_database_reopen (write=>write)"
+cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR} write ${NOTMUCH_CONFIG}
+{
+   EXPECT0(notmuch_database_reopen (db, NOTMUCH_DATABASE_MODE_READ_WRITE));
+   EXPECT0(notmuch_database_set_config (db, "test.key3", "testvalue3"));
+   EXPECT0(notmuch_database_get_config (db, "test.key1", &val));
+   printf("test.key1 = %s\n", val);
+   EXPECT0(notmuch_database_get_config (db, "test.key2", &val));
+   printf("test.key2 = %s\n", val);
+   EXPECT0(notmuch_database_get_config (db, "test.key3", &val));
+   printf("test.key3 = %s\n", val);
+}
+EOF
+cat <<'EOF' >EXPECTED
+== stdout ==
+test.key1 = testvalue1
+test.key2 = testvalue2
+test.key3 = testvalue3
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_done