* lisp/vc/vc.el (vc-rename-file): Make it work regardless of
default-directory; now the only influence of default-directory
should be resolving OLD and NEW if they are relative file names.
* test/lisp/vc/vc-tests/vc-tests.el (vc-test--rename-file): Test
the influence of default-directory on vc-rename-file.
* lisp/vc/vc-hg.el (vc-hg-diff): When OLDVERS is ".", behave the
same as if OLDVERS was the actual working revision.
(vc-hg-previous-revision): Return ".~1" for input ".", ".~3" for
input ".^^" et cetera.
Also, when passed non-symbolic revisions, use "REV~1" instead of
"REV^" for MS-Windows compatibility.
(vc-hg-working-revision-symbol):
* lisp/vc/vc-git.el (vc-git-working-revision-symbol):
* lisp/vc/vc-hooks.el (vc-symbolic-working-revision): New
functions.
(vc-default-mode-line-string):
* lisp/vc/ediff-vers.el (ediff-vc-merge-internal):
* test/lisp/vc/vc-tests/vc-tests.el (vc-test--checkin-patch):
* lisp/vc/vc.el (vc-diff-build-argument-list-internal)
(vc-diff-outgoing, vc-revision-other-window, vc-default-revert):
Call vc-symbolic-working-revision.
(vc-buffer-revision): Specify that this should always be a
revision number/hash, not a symbolic name.
* lisp/vc/vc-git.el (vc-git-previous-revision): Return "HEAD~1"
for input "HEAD", "HEAD~3" for input "HEAD^^" et cetera.
There won't be any uncommitted changes in the new working tree
yet, so vc-dir is unlikely to be useful.
* lisp/vc/vc.el (vc-add-working-tree): Finish by calling 'dired'
not 'vc-dir'.
* test/lisp/vc/vc-tests/vc-tests.el
(vc-test--other-working-trees): Delete stubbing out 'vc-dir'.
* test/lisp/vc/vc-tests/vc-tests.el (vc-test--checkin-patch):
For the last stage of the test, restore alternative code path
for Git, though this time limited to when running the test on
MS-Windows. Cf. subthread starting from
<https://lists.gnu.org/archive/html/emacs-devel/2025-09/msg00785.html>.
* lisp/vc/vc-git.el
(vc-git--with-apply-temp-to-staging): Rename ...
(vc-git--with-apply-temp): ... to this. New ARGS parameter.
All uses changes.
(vc-git--checkin): In POST function, apply PATCH-STRING to the
working tree with 'git apply --3way --ours'.
* lisp/vc/vc-hg.el (vc-hg--checkin): Document what the call to
'hg update' is for.
* test/lisp/vc/vc-tests/vc-tests.el (vc-test--checkin-patch):
Delete completed FIXME and workaround.
* lisp/vc/vc-git.el (vc-git--mailinfo): New function.
(vc-git-checkin-patch): Use it to extract authorship, date and
log message information from patches.
(vc-git--call): New INFILE argument. All uses changed.
* lisp/vc/vc-hg.el (vc-hg--checkin): When COMMENT is nil, take
authorship, date and log message information from the patch.
* lisp/vc/vc.el (checkin-patch): Specify to use authorship, date
and comment information in PATCH-STRING (bug#79408).
(prepare-patch): Specify that patch should include authorship
identity, date and log message information for REV if supported.
(diff-bounds-of-hunk): Declare.
(vc-default-checkin-patch): Warn if it looks like we will ignore
patch authorship information.
* test/lisp/vc/vc-tests/vc-tests.el (vc-hg-command)
(vc-git--out-str): Declare.
(vc-test--checkin-patch): New function.
(vc-test-git08-checkin-patch, vc-test-hg08-checkin-patch): New
tests.
* test/lisp/vc/vc-tests/vc-tests.el
(vc-test--with-author-identity): New macro, factored out of
vc-test--version-diff.
(vc-test--version-diff, vc-test--other-working-trees): Use it.
* test/lisp/vc/vc-tests/vc-tests.el
(vc-test--other-working-trees): Delete condition to skip
'move-working-tree' tests on Git<=2.17.
(vc-test-git07-other-working-trees): Skip this whole test on
Git<=2.17 (discussion in bug#79024).
* lisp/vc/vc-git.el (vc-git-delete-working-tree): Reimplement to
avoid requiring 'git worktree remove'.
(vc-git-move-working-tree): Use 'git worktree move' if 'git
worktree repair' is not available. Give a more informative
error message if we don't even have that.
* test/lisp/vc/vc-tests/vc-tests.el (vc-git--program-version):
Declare.
(vc-test--other-working-trees): Skip vc-move-working-tree tests
with Git old enough to lack 'git worktree move'.
* lisp/vc/vc-git.el (vc-git-known-other-working-trees):
* test/lisp/vc/vc-tests/vc-tests.el (vc-test--other-working-trees):
Tolerate directories with symlinks in them, such as the standard
temporary dirs on MacOS. 'git worktree list' outputs expanded names.
* test/lisp/vc/vc-tests/vc-tests.el (project, cl-lib): Require.
(vc-test--other-working-trees): Bind project-list-file to a
writeable file name.
(vc-test-hg07-other-working-trees): Use vc-hg-global-switches to
enable the share extension.
* lisp/vc/vc-git.el (vc-git--read-start-point): New function,
factored out of vc-git-create-tag.
(vc-git-create-tag): Use it.
(vc-git--worktrees, vc-git-known-other-working-trees)
(vc-git-add-working-tree, vc-git-delete-working-tree)
(vc-git-move-working-tree):
* lisp/vc/vc-hg.el (vc-hg-known-other-working-trees)
(vc-hg-add-working-tree, vc-hg--shared-p)
(vc-hg-delete-working-tree, vc-hg-move-working-tree): New
functions.
* lisp/vc/vc.el: Define API for known-other-working-tree,
add-working-tree, delete-working-tree and move-working-tree
backend functions.
(vc-dir-status-files): New function.
(project-current-directory-override): Declare.
(dired-rename-subdir): Autoload.
(vc-add-working-tree, vc-switch-working-tree)
(vc-delete-working-tree, vc-move-working-tree): New commands.
* lisp/vc/vc-hooks.el (vc-prefix-map): Bind them under C-x v.
* doc/emacs/vc1-xtra.texi (Other Working Trees): New node.
* etc/NEWS: Announce the new commands.
* test/lisp/vc/vc-tests/vc-tests.el
(vc-test--other-working-trees): New function.
(vc-test-git07-other-working-trees)
(vc-test-hg07-other-working-trees): New tests.
* lisp/ldefs-boot.el: Regenerate.
* test/lisp/vc/vc-tests/vc-tests.el (vc-test-hg06-version-diff):
Skip on MS-Windows in batch mode.
* test/lisp/vc/vc-git-tests.el (vc-git-test--start-branch): More
portable command for showing the current branch ("--show-current"
is only available since Git 2.22).
