cli/new: support /<regex>/ in new.ignore

Add support for using /<regex>/ style regular expressions in
new.ignore, mixed with the old style verbatim file and directory
basenames. The regex is matched against the relative path from the
database path.

1 files changed, 16 insertions, 5 deletions

diff --git a/doc/man1/notmuch-config.rst b/doc/man1/notmuch-config.rst
index 3ba849b2..9d6ff107 100644
--- a/doc/man1/notmuch-config.rst
+++ b/doc/man1/notmuch-config.rst
@@ -79,11 +79,22 @@ The available configuration items are described below.
         Default: ``unread;inbox``.
 
     **new.ignore**
-        A list of file and directory names, without path, that will not
-        be searched for messages by **notmuch new**. All the files and
-        directories matching any of the names specified here will be
-        ignored, regardless of the location in the mail store directory
-        hierarchy.
+        A list to specify files and directories that will not be
+        searched for messages by **notmuch new**. Each entry in the
+        list is either:
+
+          A file or a directory name, without path, that will be
+          ignored, regardless of the location in the mail store
+          directory hierarchy.
+
+        Or:
+
+          A regular expression delimited with // that will be matched
+          against the path of the file or directory relative to the
+          database path. Matching files and directories will be
+          ignored. The beginning and end of string must be explictly
+          anchored. For example, /.*/foo$/ would match "bar/foo" and
+          "bar/baz/foo", but not "foo" or "bar/foobar".
 
         Default: empty list.