Add regex search support.

README.md

@@ -14,7 +14,7 @@
 
 `buku` is a powerful bookmark management utility written in Python3 and SQLite3. When I started writing it, I couldn't find a flexible cmdline solution with a private, portable, merge-able database along with browser integration. Hence, `buku` (after my son's nickname).
 
-With tagging and multiple options to search bookmarks, including a deep scan mode (particularly for URLs), finding a bookmark is very easy. Multiple search results can be opened in the browser at once.
+With tagging and multiple options to search bookmarks, including regex and a deep scan mode (particularly for URLs), finding a bookmark is very easy. Multiple search results can be opened in the browser at once.
 
 Though a terminal utility, it's possible to add bookmarks to `buku` without touching the terminal! Refer to the section on [GUI integration](#gui-integration). If you prefer the terminal, thanks to the shell completion scripts, you don't need to memorize any of the options. There's an Easter egg to revisit random forgotten bookmarks too.
 
@@ -160,6 +160,7 @@ Shell completion scripts for Bash, Fish and Zsh can be found in respective subdi
                            special keyword -
                            "blank": list entries with empty title/tag
       --deep               match substrings ('pen' matches 'opened')
+      --sreg expr          run a regex search
       --st, --stag [...]   search bookmarks by tag
                            list tags alphabetically, if no arguments
 
@@ -224,6 +225,7 @@ Shell completion scripts for Bash, Fish and Zsh can be found in respective subdi
   - -s : match any of the keywords in URL, title or tags.
   - -S : match all the keywords in URL, title or tags.
   - --deep : match **substrings** (`match` matches `rematched`) in URL, title and tags.
+  - --sreg : match a regular expression (ignores --deep).
   - --st : search bookmarks by tag, or show all tags alphabetically.
   - Search results are indexed serially. This index is different from actual database index of a bookmark record which is shown in bold within `[]` after the URL.
 - **Encryption** is optional and manual. AES256 algorithm is used. To use encryption, the database file should be unlocked (-k) before using buku and locked (-l) afterwards. Between these 2 operations, the database file lies unencrypted on the disk, and NOT in memory. Also, note that the database file is *unencrypted on creation*.

buku

@@ -668,7 +668,8 @@ class BukuDb:
 
         self.conn.commit()
 
-    def searchdb(self, keywords, all_keywords=False, delete=False, deep=False):
+    def searchdb(self, keywords, all_keywords=False, delete=False, deep=False,
+                 regex=False):
         '''Search the database for an entries with tags or URL
         or title info matching keywords and list those.
 
@@ -699,7 +700,8 @@ class BukuDb:
         else:  # Match any keyword in URL or Title
             for token in keywords:
                 if not deep:
-                    token = '\\b' + token + '\\b'
+                    if not regex:
+                        token = '\\b' + token + '\\b'
                     query = '%s tags REGEXP ? OR URL REGEXP ? OR metadata \
                             REGEXP ? OR desc REGEXP ? OR' % (query)
                 else:
@@ -1726,6 +1728,7 @@ if __name__ == '__main__':
                      special keyword -
                      "blank": list entries with empty title/tag
 --deep               match substrings ('pen' matches 'opened')
+--sreg expr          run a regex search
 --st, --stag [...]   search bookmarks by tag
                      list tags alphabetically, if no arguments''')
     addarg = search_grp.add_argument
@@ -1733,6 +1736,7 @@ if __name__ == '__main__':
            help=argparse.SUPPRESS)
     addarg('-S', '--sall', nargs='+', metavar='keyword',
            help=argparse.SUPPRESS)
+    addarg('--sreg', nargs=1, metavar='keyword', help=argparse.SUPPRESS)
     addarg('--deep', dest='deep', action='store_true', help=argparse.SUPPRESS)
     addarg('--st', '--stag', nargs='*', dest='stag',
            action=CustomTagSearchAction, metavar='keyword',
@@ -1907,6 +1911,10 @@ if __name__ == '__main__':
         else:
             bdb.searchdb(args.sall, True, (args.delete is not None), args.deep)
 
+    # Run a regular expression search
+    elif args.sreg is not None:
+        bdb.searchdb(args.sreg, False, (args.delete is not None), regex=True)
+
     # Search bookmarks by tag and delete if wanted
     elif tagsearch:
         if len(args.stag) > 0:

buku.1

@@ -51,6 +51,7 @@ URLs are unique in DB. The same URL cannot be added twice.
   - -s : match any of the keywords in URL, title or tags.
   - -S : match all the keywords in URL, title or tags.
   - --deep : match \fBsubstrings\fR (`match` matches `rematched`) in URL, title and tags.
+  - --sreg : match a regular expression (ignores --deep).
   - --st : search bookmarks by tag, or show all tags alphabetically.
   - Search results are indexed serially. This index is different from actual database index of a bookmark record which is shown in bold within '[]' after the URL.
 .PP
@@ -95,6 +96,9 @@ Special keyword:
 .br
 "blank": list entries with empty title/tag
 .TP
+.BI \--sreg " expr"
+Scan for a regular expression match.
+.TP
 .BI \--deep
 Search modifier to match substrings. Works with -s, -S.
 .TP