diff options
Diffstat (limited to 'lisp/vc/vc-git.el')
| -rw-r--r-- | lisp/vc/vc-git.el | 126 |
1 files changed, 102 insertions, 24 deletions
diff --git a/lisp/vc/vc-git.el b/lisp/vc/vc-git.el index 9f27f759d35..671be66bbef 100644 --- a/lisp/vc/vc-git.el +++ b/lisp/vc/vc-git.el @@ -1020,40 +1020,67 @@ It is based on `log-edit-mode', and has Git-specific extensions." ;; message. Handle also remote files. (if (eq system-type 'windows-nt) (let ((default-directory (file-name-directory file1))) - (make-nearby-temp-file "git-msg"))))) + (make-nearby-temp-file "git-msg")))) + to-stash) (when vc-git-patch-string (unless (zerop (vc-git-command nil t nil "diff" "--cached" "--quiet")) - ;; Check that all staged changes also exist in the patch. - ;; This is needed to allow adding/removing files that are - ;; currently staged to the index. So remove the whole file diff - ;; from the patch because commit will take it from the index. + ;; Check that what's already staged is compatible with what + ;; we want to commit (bug#60126). + ;; + ;; 1. If the changes to a file in the index are identical to + ;; the changes to that file we want to commit, remove the + ;; changes from our patch, and let the commit take them + ;; from the index. This is necessary for adding and + ;; removing files to work. + ;; + ;; 2. If the changes to a file in the index are different to + ;; changes to that file we want to commit, then we have to + ;; unstage the changes or abort. + ;; + ;; 3. If there are changes to a file in the index but we don't + ;; want to commit any changes to that file, we need to + ;; stash those changes before committing. (with-temp-buffer (vc-git-command (current-buffer) t nil "diff" "--cached") (goto-char (point-min)) - (let ((pos (point)) file-diff file-beg) + (let ((pos (point)) file-name file-header file-diff file-beg) (while (not (eobp)) + (when (and (looking-at "^diff --git a/\\(.+\\) b/\\(.+\\)") + (string= (match-string 1) (match-string 2))) + (setq file-name (match-string 1))) (forward-line 1) ; skip current "diff --git" line + (setq file-header (buffer-substring pos (point))) (search-forward "diff --git" nil 'move) (move-beginning-of-line 1) (setq file-diff (buffer-substring pos (point))) - (if (and (setq file-beg (string-search - file-diff vc-git-patch-string)) - ;; Check that file diff ends with an empty string - ;; or the beginning of the next file diff. - (string-match-p "\\`\\'\\|\\`diff --git" - (substring - vc-git-patch-string - (+ file-beg (length file-diff))))) - (setq vc-git-patch-string - (string-replace file-diff "" vc-git-patch-string)) - (user-error "Index not empty")) + (cond ((and (setq file-beg (string-search + file-diff vc-git-patch-string)) + ;; Check that file diff ends with an empty string + ;; or the beginning of the next file diff. + (string-match-p "\\`\\'\\|\\`diff --git" + (substring + vc-git-patch-string + (+ file-beg (length file-diff))))) + (setq vc-git-patch-string + (string-replace file-diff "" vc-git-patch-string))) + ((string-match (format "^%s" (regexp-quote file-header)) + vc-git-patch-string) + (if (and file-name + (yes-or-no-p + (format "Unstage already-staged changes to %s?" + file-name))) + (vc-git-command nil 0 file-name "reset" "-q" "--") + (user-error "Index not empty"))) + (t (push file-name to-stash))) (setq pos (point)))))) - (let ((patch-file (make-nearby-temp-file "git-patch"))) - (with-temp-file patch-file - (insert vc-git-patch-string)) - (unwind-protect - (vc-git-command nil 0 patch-file "apply" "--cached") - (delete-file patch-file)))) + (unless (string-empty-p vc-git-patch-string) + (let ((patch-file (make-nearby-temp-file "git-patch"))) + (with-temp-file patch-file + (insert vc-git-patch-string)) + (unwind-protect + (vc-git-command nil 0 patch-file "apply" "--cached") + (delete-file patch-file)))) + (when to-stash (vc-git--stash-staged-changes files))) (cl-flet ((boolean-arg-fn (argument) (lambda (value) (when (equal value "yes") (list argument))))) @@ -1079,7 +1106,58 @@ It is based on `log-edit-mode', and has Git-specific extensions." args) (unless vc-git-patch-string (if only (list "--only" "--") '("-a")))))) - (if (and msg-file (file-exists-p msg-file)) (delete-file msg-file)))) + (if (and msg-file (file-exists-p msg-file)) (delete-file msg-file)) + (when to-stash + (let ((cached (make-nearby-temp-file "git-cached"))) + (unwind-protect + (progn (with-temp-file cached + (vc-git-command t 0 nil "stash" "show" "-p")) + (vc-git-command nil 0 cached "apply" "--cached")) + (delete-file cached)) + (vc-git-command nil 0 nil "stash" "drop"))))) + +(defun vc-git--stash-staged-changes (files) + "Stash only the staged changes to FILES." + ;; This is necessary because even if you pass a list of file names + ;; to 'git stash push', it will stash any and all staged changes. + (unless (zerop + (vc-git-command nil t files "diff" "--cached" "--quiet")) + (cl-flet + ((git-string (&rest args) + (string-trim-right + (with-output-to-string + (apply #'vc-git-command standard-output 0 nil args))))) + (let ((cached (make-nearby-temp-file "git-cached")) + (message "Previously staged changes") + tree) + ;; Use a temporary index to create a tree object corresponding + ;; to the staged changes to FILES. + (unwind-protect + (progn + (with-temp-file cached + (vc-git-command t 0 files "diff" "--cached" "--")) + (let* ((index (make-nearby-temp-file "git-index")) + (process-environment + (cons (format "GIT_INDEX_FILE=%s" index) + process-environment))) + (unwind-protect + (progn + (vc-git-command nil 0 nil "read-tree" "HEAD") + (vc-git-command nil 0 cached "apply" "--cached") + (setq tree (git-string "write-tree"))) + (delete-file index)))) + (delete-file cached)) + ;; Prepare stash commit object, which has a special structure. + (let* ((tree-commit (git-string "commit-tree" "-m" message + "-p" "HEAD" tree)) + (stash-commit (git-string "commit-tree" "-m" message + "-p" "HEAD" "-p" tree-commit + tree))) + ;; Push the new stash entry. + (vc-git-command nil 0 nil "update-ref" "--create-reflog" + "-m" message "refs/stash" stash-commit) + ;; Unstage the changes we've now stashed. + (vc-git-command nil 0 files "reset" "--")))))) (defun vc-git-find-revision (file rev buffer) (let* (process-file-side-effects |