* lisp/vc/diff.el (diff-buffers): New command.
(diff, diff-no-select, diff-file-local-copy): Improve docstrings.
* doc/emacs/files.texi:
* etc/NEWS: Document new command, and the previously-undocumented
ability for 'diff' to compare buffers.
* lisp/vc/diff.el (diff-check-labels): Separated out into its own
function (bug#18850)...
(diff-no-select): ... from here.
* lisp/vc/smerge-mode.el (smerge-diff): Use diff-check-labels.
Restore lines saying "Maintainer: emacs-devel@gnu.org" when there is
no special maintainer for a file. Although this wasn't documented
it was common practice and removing the lines didn't have consensus.
Most of this change is to boilerplate commentary such as license URLs.
This change was prompted by ftp://ftp.gnu.org's going-away party,
planned for November. Change these FTP URLs to https://ftp.gnu.org
instead. Make similar changes for URLs to other organizations moving
away from FTP. Also, change HTTP to HTTPS for URLs to gnu.org and
fsf.org when this works, as this will further help defend against
man-in-the-middle attacks (for this part I omitted the MS-DOS and
MS-Windows sources and the test tarballs to keep the workload down).
HTTPS is not fully working to lists.gnu.org so I left those URLs alone
for now.
* config.bat:
* msdos/sedlisp.inp:
* msdos/sedlibmk.inp:
* msdos/sedleim.inp:
* msdos/sedadmin.inp:
* msdos/sed6.inp:
* msdos/sed3v2.inp:
* msdos/sed2v2.inp:
* msdos/sed1v2.inp: Adapt to Emacs 25.
* src/process.c (remove_slash_colon): Move out of "#ifdef
subprocesses" block, as it its called unconditionally. Move
ADD_SUBFEATURE calls into "#ifdef subprocesses" block, as they
reference variables only defined in that block.
* src/msdos.h: Provide prototypes for IT_set_frame_parameters,
faccessat, msdos_fatal_signal, syms_of_msdos, pthread_sigmask,
dos_keysns, dos_keyread, run_msdos_command, and
syms_of_win16select, to avoid compiler warnings.
* src/msdos.c (SYS_ENVIRON): Define to either '_environ' or
'environ', depending on the DJGPP version.
Remove declarations of externally-visible Lisp objects, like
Qbackground_color and Qreverse.
(run_msdos_command): First argument is not signed, not unsigned.
Use SYS_ENVIRON.
(sys_select): Use 'timespec_cmp' instead of 'timespec_sign', as
the latter doesn't work when 'time_t' is an unsigned data type.
This caused idle timers to behave incorrectly: they only fired
after a keyboard input event.
* src/frame.c (adjust_frame_size) [MSDOS]: Account for
FRAME_TOP_MARGIN that isn't counted in the frame's number of
lines, but dos_set_window_size needs it to be added.
* src/lread.c (INFINITY, NAN) [DJGPP < 2.05]: Provide definitions.
* src/fns.c (sort_vector_copy) [__GNUC__ < 4]: Provide a prototype
that works around compilation errors with older GCC versions.
* src/w16select.c: Don't declare QCLIPBOARD and QPRIMARY as Lisp
Objects.
* src/filelock.c [MSDOS]: Ifdef away most of the code. Provide
no-op implementations for 'lock_file' and 'unlock_file'.
(Ffile_locked_p) [MSDOS]: Always return nil. This avoids multiple
ifdefs in all users of filelock.c functionality.
* src/conf_post.h (EOVERFLOW, SIZE_MAX) [DJGPP < 2.04]: Define.
* src/emacs.c [MSDOS]: Include dosfns.h, to avoid compiler
warnings.
* src/dosfns.h: Provide prototypes for dos_cleanup,
syms_of_dosfns, and init_dosfns.
* src/deps.mk (atimer.o): Depend on msdos.h.
(emacs.o): Depend on dosfns.h.
* src/atimer.c [MSDOS]: Include msdos.h, to avoid compiler
warnings.
* lisp/window.el (window--adjust-process-windows): Skip the body
if 'process-list' is not available. This avoids failure to start
up on MS-DOS.
* lisp/vc/diff.el (diff-no-select): Test 'make-process', not
'start-process', as the latter is now available on all platforms.
* lisp/textmodes/ispell.el (ispell-async-processp): Replace
'start-process' with 'make-process' in a comment.
* lisp/term/internal.el (IT-unicode-translations): Modify and add
a few translations to display Info files with Unicode markup. Fix
an ancient off-by-one mismatch error with Unicode codepoints.
* lisp/progmodes/compile.el (compilation-start): Test
'make-process', not 'start-process', as the latter is now
available on all platforms.
* lisp/man.el (Man-build-man-command, Man-getpage-in-background):
Test 'make-process', not 'start-process', as the latter is now
available on all platforms.
* lisp/international/mule-cmds.el (set-coding-system-map): Test
'make-process', not 'start-process', as the latter is now
available on all platforms.
* lisp/eshell/esh-cmd.el (eshell-do-pipelines-synchronously): Doc
fix.
(eshell-execute-pipeline): Test 'make-process', not
'start-process', as the latter is now available on all platforms.
Fixes: debbugs:20290
* doc/emacs/files.texi (Comparing Files): Document the new default
value of `diff-switches'.
* doc/emacs/trouble.texi (Sending Patches): Document the preference
for unified diff format. Escape the plus in the suggested `-F' regexp
value.
* lisp/vc/diff.el (diff-switches): Change the default to `-u'.
* lisp/vc/diff.el (diff-use-labels): New variable.
(diff-no-select): Use --label rather than -L, and first
check that it is supported.
Fixes: debbugs:11067
* lisp/vc/diff-mode.el (diff-setup-whitespace): New function.
(diff-mode): Use it.
* lisp/vc/diff.el (diff-sentinel):
* lisp/vc/vc.el (vc-diff-finish): Call diff-setup-whitespace to assign
Whitespace mode variables based on diff style.
Fixes: debbugs:8612
* vc/diff.el (diff-better-file-name): Function deleted.
abbreviating file names causes problems with shell-quote-argument.
(diff-no-select): Just use expand-file-name.
* lisp/ibuf-ext.el (diff-sentinel): Update declaration.
* lisp/ibuffer.el: Regenerate autoloads.
* lisp/vc/diff.el (diff-sentinel): Make new arguments optional, eg for
the sake of ibuffer-diff-buffer-with-file-1.
* lisp/vc/diff.el (diff-old-temp-file, diff-new-temp-file): Remove.
(diff-sentinel): Get them as arguments instead.
(diff-old-file, diff-new-file, diff-extra-args): Remove.
(diff-file-local-copy, diff-better-file-name): New funs.
(diff-no-select): Rename from diff-into-buffer.
Support buffers additionally to files. Move `buf' arg. Don't display buf.
Prefer closures to buffer-local variables.
(diff): Adjust accordingly.
(diff-buffer-with-file): Move from files.el.
* lisp/files.el (diff-buffer-with-file): Move to vc/diff.el.
(diff-buffer-internal): Remove.
(diff-buffer-buffer): Remove.
(save-some-buffers-action-alist): Use diff-no-select so as not to guess
the buffer name used, and so as not to mess up windows and frames.
(diff-buffer-internal): New function extracted from diff-buffer-with-file
(diff-buffer-with-file): Use it.
* lisp/vc/diff.el (diff-into-buffer): New fun, extracted from diff.
(diff): Use it.
Fixes: debbugs:7277
