211 lines
7.8 KiB
EmacsLisp
211 lines
7.8 KiB
EmacsLisp
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;;; magit-bisect.el --- bisect support for Magit -*- lexical-binding: t -*-
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;; Copyright (C) 2011-2018 The Magit Project Contributors
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;;
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;; You should have received a copy of the AUTHORS.md file which
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;; lists all contributors. If not, see http://magit.vc/authors.
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;; Author: Jonas Bernoulli <jonas@bernoul.li>
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;; Maintainer: Jonas Bernoulli <jonas@bernoul.li>
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;; Magit is free software; you can redistribute it and/or modify it
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;; under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 3, or (at your option)
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;; any later version.
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;;
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;; Magit is distributed in the hope that it will be useful, but WITHOUT
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;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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;; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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;; License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with Magit. If not, see http://www.gnu.org/licenses.
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;;; Commentary:
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;; Use a binary search to find the commit that introduced a bug.
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;;; Code:
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(require 'magit)
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;;; Options
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(defcustom magit-bisect-show-graph t
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"Whether to use `--graph' in the log showing commits yet to be bisected."
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:package-version '(magit . "2.8.0")
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:group 'magit-status
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:type 'boolean)
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(defface magit-bisect-good
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'((t :foreground "DarkOliveGreen"))
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"Face for good bisect revisions."
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:group 'magit-faces)
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(defface magit-bisect-skip
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'((t :foreground "DarkGoldenrod"))
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"Face for skipped bisect revisions."
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:group 'magit-faces)
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(defface magit-bisect-bad
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'((t :foreground "IndianRed4"))
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"Face for bad bisect revisions."
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:group 'magit-faces)
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;;; Commands
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;;;###autoload (autoload 'magit-bisect-popup "magit-bisect" nil t)
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(magit-define-popup magit-bisect-popup
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"Popup console for bisect commands."
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:man-page "git-bisect"
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:actions '((?B "Start" magit-bisect-start)
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(?s "Start script" magit-bisect-run))
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:sequence-actions '((?b "Bad" magit-bisect-bad)
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(?g "Good" magit-bisect-good)
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(?k "Skip" magit-bisect-skip)
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(?r "Reset" magit-bisect-reset)
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(?s "Run script" magit-bisect-run))
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:sequence-predicate 'magit-bisect-in-progress-p)
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;;;###autoload
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(defun magit-bisect-start (bad good)
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"Start a bisect session.
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Bisecting a bug means to find the commit that introduced it.
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This command starts such a bisect session by asking for a know
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good and a bad commit. To move the session forward use the
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other actions from the bisect popup (\
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\\<magit-status-mode-map>\\[magit-bisect-popup])."
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(interactive (if (magit-bisect-in-progress-p)
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(user-error "Already bisecting")
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(magit-bisect-start-read-args)))
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(magit-git-bisect "start" (list bad good) t))
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(defun magit-bisect-start-read-args ()
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(let ((b (magit-read-branch-or-commit "Start bisect with bad revision")))
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(list b (magit-read-other-branch-or-commit "Good revision" b))))
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;;;###autoload
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(defun magit-bisect-reset ()
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"After bisecting, cleanup bisection state and return to original `HEAD'."
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(interactive)
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(magit-confirm 'reset-bisect)
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(magit-run-git "bisect" "reset")
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(ignore-errors (delete-file (magit-git-dir "BISECT_CMD_OUTPUT"))))
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;;;###autoload
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(defun magit-bisect-good ()
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"While bisecting, mark the current commit as good.
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Use this after you have asserted that the commit does not contain
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the bug in question."
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(interactive)
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(magit-git-bisect "good"))
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;;;###autoload
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(defun magit-bisect-bad ()
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"While bisecting, mark the current commit as bad.
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Use this after you have asserted that the commit does contain the
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bug in question."
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(interactive)
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(magit-git-bisect "bad"))
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;;;###autoload
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(defun magit-bisect-skip ()
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"While bisecting, skip the current commit.
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Use this if for some reason the current commit is not a good one
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to test. This command lets Git choose a different one."
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(interactive)
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(magit-git-bisect "skip"))
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;;;###autoload
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(defun magit-bisect-run (cmdline &optional bad good)
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"Bisect automatically by running commands after each step.
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Unlike `git bisect run' this can be used before bisecting has
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begun. In that case it behaves like `git bisect start; git
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bisect run'."
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(interactive (let ((args (and (not (magit-bisect-in-progress-p))
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(magit-bisect-start-read-args))))
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(cons (read-shell-command "Bisect shell command: ") args)))
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(when (and bad good)
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(magit-bisect-start bad good))
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(magit-git-bisect "run" (list shell-file-name shell-command-switch cmdline)))
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(defun magit-git-bisect (subcommand &optional args no-assert)
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(unless (or no-assert (magit-bisect-in-progress-p))
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(user-error "Not bisecting"))
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(magit-with-toplevel
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(magit-run-git-with-logfile
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(magit-git-dir "BISECT_CMD_OUTPUT") "bisect" subcommand args)))
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;;; Sections
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(defun magit-bisect-in-progress-p ()
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(file-exists-p (magit-git-dir "BISECT_LOG")))
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(defun magit-insert-bisect-output ()
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"While bisecting, insert section with output from `git bisect'."
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(when (magit-bisect-in-progress-p)
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(let* ((lines
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(or (magit-file-lines (magit-git-dir "BISECT_CMD_OUTPUT"))
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(list "Bisecting: (no saved bisect output)"
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"It appears you have invoked `git bisect' from a shell."
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"There is nothing wrong with that, we just cannot display"
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"anything useful here. Consult the shell output instead.")))
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(done-re "^\\([a-z0-9]\\{40\\}\\) is the first bad commit$")
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(bad-line (or (and (string-match done-re (car lines))
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(pop lines))
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(--first (string-match done-re it) lines))))
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(magit-insert-section ((eval (if bad-line 'commit 'bisect-output))
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(and bad-line (match-string 1 bad-line)))
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(magit-insert-heading
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(propertize (or bad-line (pop lines))
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'face 'magit-section-heading))
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(dolist (line lines)
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(insert line "\n"))))
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(insert "\n")))
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(defun magit-insert-bisect-rest ()
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"While bisecting, insert section visualizing the bisect state."
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(when (magit-bisect-in-progress-p)
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(magit-insert-section (bisect-view)
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(magit-insert-heading "Bisect Rest:")
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(magit-git-wash (apply-partially 'magit-log-wash-log 'bisect-vis)
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"bisect" "visualize" "git" "log"
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"--format=%h%d%x00%s" "--decorate=full"
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(and magit-bisect-show-graph "--graph")))))
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(defun magit-insert-bisect-log ()
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"While bisecting, insert section logging bisect progress."
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(when (magit-bisect-in-progress-p)
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(magit-insert-section (bisect-log)
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(magit-insert-heading "Bisect Log:")
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(magit-git-wash #'magit-wash-bisect-log "bisect" "log")
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(insert ?\n))))
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(defun magit-wash-bisect-log (_args)
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(let (beg)
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(while (progn (setq beg (point-marker))
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(re-search-forward "^\\(git bisect [^\n]+\n\\)" nil t))
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(magit-bind-match-strings (heading) nil
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(magit-delete-match)
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(save-restriction
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(narrow-to-region beg (point))
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(goto-char (point-min))
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(magit-insert-section (bisect-item heading t)
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(insert (propertize heading 'face 'magit-section-secondary-heading))
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(magit-insert-heading)
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(magit-wash-sequence
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(apply-partially 'magit-log-wash-rev 'bisect-log
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(magit-abbrev-length)))
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(insert ?\n)))))
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(when (re-search-forward
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"# first bad commit: \\[\\([a-z0-9]\\{40\\}\\)\\] [^\n]+\n" nil t)
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(magit-bind-match-strings (hash) nil
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(magit-delete-match)
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(magit-insert-section (bisect-item)
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(insert hash " is the first bad commit\n"))))))
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(provide 'magit-bisect)
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;;; magit-bisect.el ends here
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