* lisp/progmodes/project.el (project): New custom group.
(project-vc): Use it as parent.
(project-vc-merge-submodules): Tag with Emacs version.
(project-read-file-name-function): Assign to the 'project' group.
(project-list-file): New user option (bug#41600).
(project--write-project-list, project--read-project-list): Use it.
* lisp/progmodes/project.el (project--ensure-file-exists): Remove.
(project--read-project-list): Set 'project--list' to nil when the
project list file doesn't exist.
(project-compile): Add args and interactive spec like in 'compile'.
(project-switch-commands): Bind project-vc-dir to "v",
project-shell to "s", and rebind project-find-regexp from "s" to "r".
* doc/emacs/maintaining.texi (Project File Commands):
Describe project-vc-dir and project-shell.
* lisp/progmodes/project.el (project--read-project-list): Simplify the
previous commit by utilizing the optional OMIT-NULLS argument to
'split-string'.
* lisp/progmodes/project.el (project-dired, project-eshell)
(project--read-project-list, project--write-project-list)
(project--add-to-project-list-front)
(project--remove-from-project-list): Adapt to the new 'project-root'.
* lisp/progmodes/project.el (project-switch-commands): Rename from
'project-switch-menu'.
(project--keymap-prompt, project-switch-project): Update after the
renaming.
* lisp/progmodes/project.el: Require seq.
(project--switch-alist): Remove in favor of the public
'project-switch-menu'.
(project-add-switch-command): Remove; not needed now that
'project-switch-menu' is a public alist.
(project-switch-menu): New variable mapping keys to project switching
menu entries.
(project--keymap-prompt, project-switch-project): Adjust to the new
'project-switch-menu' format.
* lisp/progmodes/project.el:
(project-find-regexp): Add to the list of 'switch' commands.
(project-switch-project): Use call-interactively so that the
former can read its arguments.
* lisp/progmodes/project.el:
(project--transient-p) Remove, not needed.
(project-current): Move project-find based on the directory here.
(project--remove-from-project-list): Only write if the list changed.
(project-find-project): Rename to project-prompt-project-dir.
Simply return the directory selected by the user.
(project-switch-project-find-file): Remove.
(project-switch-project-dired): Rename to project-dired and make
it follow the convention of existing projec tcommands.
(project-switch-project-eshell): Ditto.
(project-switch-project): Instead of passing the project instance
to the command, just bind default-directory.
Practice shows that the vast majority of projects only use one main
root. The users of this API very often make this assumption as well.
The rest of the "roots" should be possible to express through
project-external-roots.
* lisp/progmodes/project.el: Update the commentary.
Only 4 non-obsolete generics now.
(project-root): Replacement for `project-roots'.
All callers updated. Implementations too.
(project-roots): Declare obsolete.
(project-external-roots): Simplify the docstring.
(project-ignores): Update the docstring.
(project-find-regexp): Omit the second arg to project-files.
(project--dir-ignores): Simplify.
(project-compile): Simplify, remove outdated comment.
* lisp/cedet/ede.el: Add a FIXME.
* lisp/progmodes/project.el (project-vc): Update the docstring.
(project-vc-merge-submodules): New user option.
(project-try-vc): Use it.
(project--submodule-p): Extract from project-try-vc.
The new packages state they require Emacs 26.3 to function, but a
small part of project.el breaks this "soft" rule: the two functions
requiring fileloop.el are incompatible with Emacs 26.3.
* lisp/jsonrpc.el: Tweak comment near Package-Requires.
* lisp/emacs-lisp/eldoc.el: Add Version and Package-Requires.
* lisp/progmodes/flymake.el: Add comment near Package-Requires.
* lisp/progmodes/project.el: Add Version and Package-Requires.
* lisp/progmodes/xref.el: Add Version and Package-Requires.
* lisp/progmodes/project.el (project--files-in-directory): Run
local DIR directory names through 'expand-file-name', so that "~/"
is expanded, in case the shell doesn't or the shell's notion of
the home directory is different from that of Emacs. (Bug#40940)
* lisp/progmodes/project.el (project--find-regexp-in-files):
Signal user-error when passed an empty list of files.
* lisp/progmodes/xref.el (xref-matches-in-files):
Make sure FILES is not empty.
* lisp/progmodes/project.el (project-find-regexp): Require 'grep'
to be able to call 'grep-read-files'.
(project-search, project-query-replace-regexp): Doc fixes.
* doc/emacs/maintaining.texi (Projects): New section.
* doc/emacs/emacs.texi (Top): Add "Projects" to the detailed menu.
* lisp/progmodes/project.el (project-files):
Remove (require 'xref).
(project--files-in-directory): Add it here instead.
(project-find-regexp, project-or-external-find-regexp): And here.
For 'xref--show-xrefs'.
* lisp/progmodes/xref.el (xref-matches-in-files): Extract from
project--find-regexp-in-files.
* lisp/dired-aux.el (dired-do-find-regexp): Also use it here.
* lisp/progmodes/project.el (project-try-vc): Do not treat a Git
submodule as a project root, go up to the parent repo.
(project--git-submodules): New function.
(project--vc-list-files): Use it. Recurse into submodules.
