* lisp/gnus/nnselect.el (nnselect-request-group): If an ephemeral
group is empty, there is nothing to see, so remove the group.
(nnselect-run): Catch and return an empty artlist on error.
This library provides a fundamental reworking of the search
functionality previously found in nnir.el. It uses class-based search
engines to interface with external searching facilities, and a parsed
search query syntax that can search multiple engines.
* lisp/gnus/gnus-search.el: New library containing search
functionality for Gnus.
* doc/misc/gnus.texi: Document.
* lisp/gnus/gnus-group.el (gnus-group-make-search-group,
gnus-group-read-ephemeral-search-group): Remove references to nnir,
change meaning of prefix argument, change values of nnselect-function
and nnselect-args.
* lisp/gnus/nnselect.el: Replace references to nnir
(nnselect-request-article): Use gnus-search functions, and search
criteria.
(nnselect-request-thread, nnselect-search-thread): Use gnus-search
thread search.
(gnus-summary-make-search-group): Switch to use gnus-search function
and arguments.
* test/lisp/gnus/search-tests.el: Tests for new functionality.
* lisp/gnus/nnselect.el (numbers-by-group,
nnselect-request-update-info, nnselect-push-info): Handle all three
mark types ('tuple, 'range, 'list) and general speedups.
This is part of removing code from nnir.el that isn't related to
searching backends and therefore belongs somewhere else.
* lisp/gnus/gnus-group.el (gnus-group-make-search-group)
(gnus-group-read-ephemeral-search-group): Put the logic for
determining the groups to search here, rather than in nnir. Improve
documentation.
* lisp/gnus/gnus-int.el (gnus-server-get-active): Renamed from
'nnir-get-active.
* lisp/gnus/nnir.el (nnir-run-imap, nnir-run-find-grep): Use it.
(nnir-get-active): Remove.
(nnir-make-specs): Make obsolete.
* lisp/gnus/nnselect.el (nnselect-group-server): Make obsolete in
favor of 'gnus-group-server.
* lisp/org/ol-gnus.el (org-gnus-store-link): Change 'nnir to
'nnselect.
* lisp/gnus/gnus-group.el: Define obsolete function alias for
'gnus-group-make-nnir-group to
'gnus-group-read-ephemeral-search-group.
* lisp/gnus/gnus-sum.el: Define obsolete variable alias for
'gnus-refer-thread-use-nnir to 'gnus-refer-thread-use-search.
* lisp/gnus/nnselect.el: Define obsolete variable alias for
'nnir-retrieve-headers-override-function to
'nnselect-retrieve-headers-override-function.
* lisp/gnus/nnir.el: Restore definition of 'nnir-summary-line-format
and mark obsolete.
This new backend allows gnus to handle arbitrary sets of messages
spanning multiple groups, even when these groups are from different
backends and different servers. All gnus glue is removed from
nnir (leaving only the backend search functions) and gnus
search-related processing is done through nnselect. In appropriate
places 'nnir' has been replaced by 'nnselect' or 'search'.
* etc/NEWS: Document the change.
* doc/misc/gnus.texi: New documentation for nnselect and update
searching and thread-referral sections.
* lisp/gnus/nnselect.el: New file.
* lisp/gnus/nnir.el: Remove all gnus glue, leaving only searching
capability. Improve documentation strings.
* lisp/gnus/gnus-group.el (gnus-group-read-ephemeral-search-group,
gnus-group-make-search-group): New functions.
* lisp/gnus/gnus-msg.el (gnus-setup-message, gnus-group-news,
gnus-summary-news-other-window): Update to work for nnselect. Fix
gnus-newsgroup-name wrangling.
*lisp/gnus/gnus-registry.el
(gnus-registry-action,gnus-registry-ignore-group-p): Make work from nnselect.
* lisp/gnus/nnheader.el (nnheader-parse-head, nnheader-parse-nov):
Rework and consolidate header parsing.
* lisp/gnus/gnus-agent.el (gnus-agent-regenerate-group):
* lisp/gnus/gnus-cache.el (gnus-possibly-enter-article):
* lisp/gnus/gnus-cloud.el (gnus-cloud-available-chunks):
* lisp/gnus/gnus-msg.el (gnus-inews-yank-articles):
* lisp/gnus/gnus-sum. (gnus-get-newsgroup-headers):
* lisp/gnus/nndiary.el (nndiary-parse-head):
* lisp/gnus/nnfolder.el (nnfolder-parse-head):
* lisp/gnus/nnmaildir.el (nnmaildir--update-nov):
* lisp/gnus/nnml.el (nnml-parse-head):
* lisp/gnus/nnspool.el (nnspool-insert-nov-head):
Use new header parsing.
* lisp/gnus/gnus-start.el (gnus-read-active-for-groups): Rescan on
activation by default.
* lisp/gnus/gnus-sum.el (gnus-summary-line-format-alist): New specs
for virtual groups.
(gnus-article-sort-by-rsv, gnus-thread-sort-by-rsv): New functions to
allow sorting by search RSV.
