procyberian/emacs
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Discover repository version in linked worktrees (bug#21930)

Browse source 
* lisp/version.el (emacs-repository--version-git-1): Do not assume
HEAD is at .git/HEAD, it can also be at .git/worktrees/<branch>/HEAD.
(emacs-repository-get-version): Grok linked worktrees when EXTERNAL
is nil too.
This commit is contained in:
Juanma Barranquero 2015-11-19 21:32:43 +01:00
parent 32845e3aad
commit c210b8b128
1 changed files with 41 additions and 23 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

64
lisp/version.el
View file

@ -113,17 +113,17 @@ or if we could not determine the revision.")
(looking-at "[0-9a-fA-F]\\{40\\}"))
(match-string 0)))))
(defun emacs-repository--version-git-1 (file)
(defun emacs-repository--version-git-1 (file dir)
"Internal subroutine of `emacs-repository-get-version'."
(when (file-readable-p file)
(erase-buffer)
(insert-file-contents file)
(cond ((looking-at "[0-9a-fA-F]\\{40\\}")
(match-string 0))
((looking-at "ref: \\(.*\\)")
(emacs-repository--version-git-1
(expand-file-name (match-string 1)
(file-name-directory file)))))))
(with-temp-buffer
(insert-file-contents file)
(cond ((looking-at "[0-9a-fA-F]\\{40\\}")
(match-string 0))
((looking-at "ref: \\(.*\\)")
(emacs-repository--version-git-1
(expand-file-name (match-string 1) dir)
dir))))))
(defun emacs-repository-get-version (&optional dir external)
"Try to return as a string the repository revision of the Emacs sources.
@ -138,20 +138,38 @@ Optional argument EXTERNAL non-nil means to just ask the VCS itself,
if the sources appear to be under version control. Otherwise only ask
the VCS if we cannot find any information ourselves."
(or dir (setq dir source-directory))
(when (file-directory-p (expand-file-name ".git" dir))
(if external
(emacs-repository-version-git dir)
(or (let ((files '("HEAD" "refs/heads/master"))
file rev)
(with-temp-buffer
(while (and (not rev)
(setq file (car files)))
(setq file (expand-file-name (format ".git/%s" file) dir)
files (cdr files)
rev (emacs-repository--version-git-1 file))))
rev)
;; AFAICS this doesn't work during dumping (bug#20799).
(emacs-repository-version-git dir)))))
(let* ((base-dir (expand-file-name ".git" dir))
(in-main-worktree (file-directory-p base-dir))
(in-linked-worktree nil)
sub-dir)
;; If the sources are in a linked worktree, .git is a file that points to
;; the location of the main worktree and the repo's administrative files.
(when (and (not in-main-worktree)
(file-regular-p base-dir)
(file-readable-p base-dir))
(with-temp-buffer
(insert-file-contents base-dir)
(when (looking-at "gitdir: \\(.*\.git\\)\\(.*\\)$")
(setq base-dir (match-string 1)
sub-dir (concat base-dir (match-string 2))
in-linked-worktree t))))
;; We've found a worktree, either main or linked.
(when (or in-main-worktree in-linked-worktree)
(if external
(emacs-repository-version-git dir)
(or (if in-linked-worktree
(emacs-repository--version-git-1
(expand-file-name "HEAD" sub-dir) base-dir)
(let ((files '("HEAD" "refs/heads/master"))
file rev)
(while (and (not rev)
(setq file (car files)))
(setq file (expand-file-name file base-dir)
files (cdr files)
rev (emacs-repository--version-git-1 file base-dir)))
rev))
;; AFAICS this doesn't work during dumping (bug#20799).
(emacs-repository-version-git dir))))))
;; We put version info into the executable in the form that `ident' uses.
(purecopy (concat "\n$Id: " (subst-char-in-string ?\n ?\s (emacs-version))