posix_spawn is less error-prone than vfork + execve, and can make
better use of system-specific enhancements like 'clone' on Linux. Use
it if we don't need to configure a pseudoterminal.
* configure.ac (HAVE_SPAWN_H, HAVE_POSIX_SPAWN)
(HAVE_POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR)
(HAVE_POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR_NP)
(HAVE_POSIX_SPAWNATTR_SETFLAGS, HAVE_DECL_POSIX_SPAWN_SETSID): New
configuration variables.
* src/callproc.c (USABLE_POSIX_SPAWN): New configuration macro.
(emacs_posix_spawn_init_actions)
(emacs_posix_spawn_init_attributes, emacs_posix_spawn_init): New
helper functions.
(emacs_spawn): Use posix_spawn if possible.
Previously, each function in 'tramp-foreign-file-name-handler-alist'
would call 'tramp-dissect-file-name', resulting in it being called
several times whenever 'tramp-find-foreign-file-name-handler' was
called. Now, functions take the dissected file name to avoid this
duplicated effort. (Bug#51699)
* etc/NEWS: Announce this change.
* lisp/net/tramp-adb.el (tramp-adb-file-name-p):
* lisp/net/tramp-ftp.el (tramp-ftp-file-name-p):
* lisp/net/tramp-gvfs.el (tramp-gvfs-file-name-p):
* lisp/net/tramp-rclone.el (tramp-rclone-file-name-p):
* lisp/net/tramp-smb.el (tramp-smb-file-name-p):
* lisp/net/tramp-sshfs.el (tramp-sshfs-file-name-p):
* lisp/net/tramp-sudoedit.el (tramp-sudoedit-file-name-p):
Accept dissected file names.
* lisp/net/tramp.el (tramp-ensure-dissected-file-name): New function.
(tramp-find-foreign-file-name-handler): Pass dissected file name to
functions.
(tramp-connectable-p): Use 'tramp-ensure-dissected-file-name'.
* lisp/erc/erc.el (erc-cmd-QUERY): Be less enthusiastic about
announcing missing/broken functionality. The comment "except this is
broken right now" has been there since 2008, and it's not obvious to
me that we should ever re-add it.
* src/term.c (init_tty): Fix the change which introduced support
for the terminfo Tc flag. The code as installed broke colors in
PuTTY -nw sessions, because 'tigetflag' returned -1, which is
non-zero, so it was treated as the sign that true color is
supported. But if the value returned by 'tigetflag' is -1, it means
the capability is not a boolean one, so that's not to be used as a
valid support for 24-bit color. (Bug#44950)
* lisp/xwidget.el (xwidget-webkit-buffer-name-format): Update
doc string.
(xwidget-webkit-callback): Add a format spec %U, which stands
for the current URI of the widget.
* doc/emacs/misc.texi (Emacs Server): Document the new function.
Also mention that an Emacs server can be started with emacsclient.
* etc/NEWS: Describe the new function (bug#51377).
* lisp/server.el (server-stop-automatically): New function.
(server-stop-automatically): New auxiliary variable.
(server-stop-automatically--maybe-kill-emacs)
(server-stop-automatically--handle-delete-frame): New auxiliary
functions.
(server-save-buffers-kill-terminal): Call the new auxiliary
function when necessary.
* lisp/select.el (gui-get-selection): Make (gui-get-selection
'CLIPBOARD 'text/html) get decoded correctly (bug#31149), but still
avoid the logic on Windows.
* test/lisp/files-tests.el: Add 'insert-directory' tests.
* test/lisp/files-resources/insert-directory/: Create directories and files to
use for testing 'insert-directory'.
Add tests for 'insert-directory' base functionality and regression tests for
the issue where free space was reported for the current directory instead of
the target of 'list-directory' (Bug#50630).
* doc/lispref/display.texi (Xwidgets): Document new function.
* etc/NEWS: Announce new function.
* src/xwidget.c (Fxwidget_webkit_load_html): New function.
(syms_of_xwidget): Define new subr.
* src/w32font.c (w32_decode_weight, w32_encode_weight)
(w32_to_fc_weight): Adjust weight translations to match those in
font.c and gtkutil.c:xg_weight_to_symbol. (Bug#51704)
* lisp/emacs-lisp/package.el (package-quickstart-refresh): Disable the
"`make-variable-buffer-local' not called at toplevel" byte-compiler
warnings. Given that we wrap it all in a let-form, these are mostly
false positives and not helpful.
