[Patch v3 04/15] lib: make folder: prefix literal
Austin Clements
amdragon at MIT.EDU
Sun Mar 9 09:15:48 PDT 2014
Quoth Jani Nikula on Mar 09 at 10:45 am:
> On Sun, 09 Mar 2014, Austin Clements <amdragon at MIT.EDU> wrote:
> > Quoth David Bremner on Mar 08 at 5:19 pm:
> >> From: Jani Nikula <jani at nikula.org>
> >>
> >> In xapian terms, convert folder: prefix from probabilistic to boolean
> >> prefix, matching the paths, relative form the maildir root, of the
> >
> > s/form/from/
> >
> >> message files, ignoring the maildir new and cur leaf directories.
> >>
> >> folder:foo matches all message files in foo, foo/new, and foo/cur.
> >>
> >> folder:foo/new does *not* match message files in foo/new.
> >>
> >> folder:"" matches all message files in the top level maildir and its
> >> new and cur subdirectories.
> >>
> >> This change constitutes a database change: bump the database version
> >> and add database upgrade support for folder: terms. The upgrade also
> >> adds path: terms.
> >> ---
> >> lib/database.cc | 38 ++++++++++++++++++++++--
> >> lib/message.cc | 80 ++++++++++++++++++++++++++++++++++++++++++++-------
> >> lib/notmuch-private.h | 3 ++
> >> 3 files changed, 108 insertions(+), 13 deletions(-)
> >>
> >> diff --git a/lib/database.cc b/lib/database.cc
> >> index 93cc7f5..186e3a7 100644
> >> --- a/lib/database.cc
> >> +++ b/lib/database.cc
> >> @@ -42,7 +42,7 @@ typedef struct {
> >> const char *prefix;
> >> } prefix_t;
> >>
> >> -#define NOTMUCH_DATABASE_VERSION 1
> >> +#define NOTMUCH_DATABASE_VERSION 2
> >>
> >> #define STRINGIFY(s) _SUB_STRINGIFY(s)
> >> #define _SUB_STRINGIFY(s) #s
> >> @@ -210,6 +210,7 @@ static prefix_t BOOLEAN_PREFIX_EXTERNAL[] = {
> >> { "is", "K" },
> >> { "id", "Q" },
> >> { "path", "P" },
> >> + { "folder", "XFOLDER:" },
> >
> > It took me a while to figure out that the ":" here means that Xapian
> > will unconditionally use a ":" after the prefix, instead of only using
> > a ":" when the first letter following the prefix is upper-case ASCII.
> > Maybe I was only confused by this because I simultaneously knew too
> > much and not enough about Xapian, but it might be worth a comment.
> > Something like,
> >
> > /* 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. */
>
> Do you mean "... first letter of the _prefix_ is ..."?
I did mean the path. If the folder prefer were just "XFOLDER", then
Xapian::QueryParser would translate the query folder:foo into the term
XFOLDERfoo like you'd expect, but it would translate the query
folder:Foo into the term XFOLDER:Foo. We'd have to account for this
when constructing terms and (arguably) when removing terms. But
"XFOLDER:" suppresses the colon-adding logic, so these two queries
simply map to XFOLDER:foo and XFOLDER:Foo.
> Jani.
>
> >
> >> };
> >>
> >> static prefix_t PROBABILISTIC_PREFIX[]= {
> >> @@ -217,7 +218,6 @@ static prefix_t PROBABILISTIC_PREFIX[]= {
> >> { "to", "XTO" },
> >> { "attachment", "XATTACHMENT" },
> >> { "subject", "XSUBJECT"},
> >> - { "folder", "XFOLDER"}
> >> };
> >>
> >> const char *
> >> @@ -1168,6 +1168,40 @@ notmuch_database_upgrade (notmuch_database_t *notmuch,
> >> }
> >> }
> >>
> >> + /*
> >> + * 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 (version < 2) {
> >> + notmuch_query_t *query = notmuch_query_create (notmuch, "");
> >
> > Three space indentation and no tabs? (It looks like this was in
> > Jani's v2, also. I'm guessing at some point there was a copy-paste
> > from a diff with tabs converted to spaces?)
> >
> >> + notmuch_messages_t *messages;
> >> + notmuch_message_t *message;
> >> +
> >> + count = 0;
> >> + total = notmuch_query_count_messages (query);
> >> +
> >> + for (messages = notmuch_query_search_messages (query);
> >> + 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);
> >> +
> >> + _notmuch_message_upgrade_folder (message);
> >> + _notmuch_message_sync (message);
> >> +
> >> + notmuch_message_destroy (message);
> >> +
> >> + count++;
> >> + }
> >> +
> >> + notmuch_query_destroy (query);
> >> + }
> >> +
> >> db->set_metadata ("version", STRINGIFY (NOTMUCH_DATABASE_VERSION));
> >> db->flush ();
> >>
> >> diff --git a/lib/message.cc b/lib/message.cc
> >> index 21abe8e..31cb9f1 100644
> >> --- a/lib/message.cc
> >> +++ b/lib/message.cc
> >> @@ -504,6 +504,56 @@ _notmuch_message_remove_terms (notmuch_message_t *message, const char *prefix)
> >> }
> >> }
> >>
> >> +/* Return true if p points at "new" or "cur". */
> >> +static bool is_maildir (const char *p)
> >> +{
> >> + return strcmp (p, "cur") == 0 || strcmp (p, "new") == 0;
> >> +}
> >> +
> >> +/* Add "folder:" term for directory. */
> >> +static notmuch_status_t
> >> +_notmuch_message_add_folder_terms (notmuch_message_t *message,
> >> + const char *directory)
> >> +{
> >> + char *folder, *last;
> >> +
> >> + folder = talloc_strdup (NULL, directory);
> >> + if (! folder)
> >> + return NOTMUCH_STATUS_OUT_OF_MEMORY;
> >
> > Same formatting problem in this chunk.
> >
> >> +
> >> + /*
> >> + * If the message file is in a leaf directory named "new" or
> >> + * "cur", presume maildir and index the parent directory. Thus a
> >> + * "folder:" prefix search matches messages in the specified
> >> + * maildir folder, i.e. in the specified directory and its "new"
> >> + * and "cur" subdirectories.
> >> + *
> >> + * Note that this means the "folder:" prefix can't be used for
> >> + * distinguishing between message files in "new" or "cur". The
> >> + * "path:" prefix needs to be used for that.
> >> + *
> >> + * Note the deliberate difference to _filename_is_in_maildir(). We
> >> + * don't want to index different things depending on the existence
> >> + * or non-existence of all maildir sibling directories "new",
> >> + * "cur", and "tmp". Doing so would be surprising, and difficult
> >> + * for the user to fix in case all subdirectories were not in
> >> + * place during indexing.
> >> + */
> >> + last = strrchr (folder, '/');
> >> + if (last) {
> >> + if (is_maildir (last + 1))
> >> + *last = '\0';
> >> + } else if (is_maildir (folder)) {
> >> + *folder = '\0';
> >> + }
> >> +
> >> + _notmuch_message_add_term (message, "folder", folder);
> >> +
> >> + talloc_free (folder);
> >> +
> >> + return NOTMUCH_STATUS_SUCCESS;
> >> +}
> >> +
> >> #define RECURSIVE_SUFFIX "/**"
> >>
> >> /* Add "path:" terms for directory. */
> >> @@ -570,9 +620,8 @@ _notmuch_message_add_directory_terms (void *ctx, notmuch_message_t *message)
> >> directory = _notmuch_database_get_directory_path (ctx,
> >> message->notmuch,
> >> directory_id);
> >> - if (strlen (directory))
> >> - _notmuch_message_gen_terms (message, "folder", directory);
> >>
> >> + _notmuch_message_add_folder_terms (message, directory);
> >> _notmuch_message_add_path_terms (message, directory);
> >> }
> >>
> >> @@ -610,9 +659,7 @@ _notmuch_message_add_filename (notmuch_message_t *message,
> >> * notmuch_directory_get_child_files() . */
> >> _notmuch_message_add_term (message, "file-direntry", direntry);
> >>
> >> - /* New terms allow user to search with folder: specification. */
> >> - _notmuch_message_gen_terms (message, "folder", directory);
> >> -
> >> + _notmuch_message_add_folder_terms (message, directory);
> >> _notmuch_message_add_path_terms (message, directory);
> >>
> >> talloc_free (local);
> >> @@ -637,8 +684,6 @@ _notmuch_message_remove_filename (notmuch_message_t *message,
> >> const char *filename)
> >> {
> >> void *local = talloc_new (message);
> >> - const char *folder_prefix = _find_prefix ("folder");
> >> - char *zfolder_prefix = talloc_asprintf(local, "Z%s", folder_prefix);
> >> char *direntry;
> >> notmuch_private_status_t private_status;
> >> notmuch_status_t status;
> >> @@ -659,10 +704,7 @@ _notmuch_message_remove_filename (notmuch_message_t *message,
> >> /* Re-synchronize "folder:" and "path:" terms for this message. */
> >>
> >> /* Remove all "folder:" terms. */
> >> - _notmuch_message_remove_terms (message, folder_prefix);
> >> -
> >> - /* Remove all "folder:" stemmed terms. */
> >> - _notmuch_message_remove_terms (message, zfolder_prefix);
> >> + _notmuch_message_remove_terms (message, _find_prefix ("folder"));
> >>
> >> /* Remove all "path:" terms. */
> >> _notmuch_message_remove_terms (message, _find_prefix ("path"));
> >> @@ -675,6 +717,22 @@ _notmuch_message_remove_filename (notmuch_message_t *message,
> >> return status;
> >> }
> >>
> >> +/* Upgrade the "folder:" prefix from V1 to V2. */
> >> +#define FOLDER_PREFIX_V1 "XFOLDER"
> >> +#define ZFOLDER_PREFIX_V1 "Z" FOLDER_PREFIX_V1
> >> +void
> >> +_notmuch_message_upgrade_folder (notmuch_message_t *message)
> >> +{
> >> + /* Remove all old "folder:" terms. */
> >> + _notmuch_message_remove_terms (message, FOLDER_PREFIX_V1);
> >> +
> >> + /* Remove all old "folder:" stemmed terms. */
> >> + _notmuch_message_remove_terms (message, ZFOLDER_PREFIX_V1);
> >> +
> >> + /* Add new boolean "folder:" and "path:" terms. */
> >> + _notmuch_message_add_directory_terms (message, message);
> >> +}
> >> +
> >> char *
> >> _notmuch_message_talloc_copy_data (notmuch_message_t *message)
> >> {
> >> diff --git a/lib/notmuch-private.h b/lib/notmuch-private.h
> >> index af185c7..59eb2bc 100644
> >> --- a/lib/notmuch-private.h
> >> +++ b/lib/notmuch-private.h
> >> @@ -263,6 +263,9 @@ _notmuch_message_gen_terms (notmuch_message_t *message,
> >> void
> >> _notmuch_message_upgrade_filename_storage (notmuch_message_t *message);
> >>
> >> +void
> >> +_notmuch_message_upgrade_folder (notmuch_message_t *message);
> >> +
> >> notmuch_status_t
> >> _notmuch_message_add_filename (notmuch_message_t *message,
> >> const char *filename);
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