535 lines
21 KiB
EmacsLisp
535 lines
21 KiB
EmacsLisp
;;; magit-utils.el --- various utilities -*- lexical-binding: t -*-
|
|
|
|
;; Copyright (C) 2010-2016 The Magit Project Contributors
|
|
;;
|
|
;; You should have received a copy of the AUTHORS.md file which
|
|
;; lists all contributors. If not, see http://magit.vc/authors.
|
|
|
|
;; Author: Jonas Bernoulli <jonas@bernoul.li>
|
|
;; Maintainer: Jonas Bernoulli <jonas@bernoul.li>
|
|
|
|
;; Contains code from GNU Emacs https://www.gnu.org/software/emacs,
|
|
;; released under the GNU General Public License version 3 or later.
|
|
|
|
;; Magit is free software; you can redistribute it and/or modify it
|
|
;; under the terms of the GNU General Public License as published by
|
|
;; the Free Software Foundation; either version 3, or (at your option)
|
|
;; any later version.
|
|
;;
|
|
;; Magit is distributed in the hope that it will be useful, but WITHOUT
|
|
;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
;; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
|
|
;; License for more details.
|
|
;;
|
|
;; You should have received a copy of the GNU General Public License
|
|
;; along with Magit. If not, see http://www.gnu.org/licenses.
|
|
|
|
;;; Commentary:
|
|
|
|
;; This library defines several utility functions used by several
|
|
;; other libraries which cannot depend on one another (because
|
|
;; circular dependencies are not good). Luckily most (all) of these
|
|
;; functions have very little (nothing) to do with Git, so we not only
|
|
;; have to do this, it even makes sense.
|
|
|
|
;; Unfortunately there are also some options which are used by several
|
|
;; libraries which cannot depend on one another, they are defined here
|
|
;; too.
|
|
|
|
;;; Code:
|
|
|
|
(require 'cl-lib)
|
|
(require 'dash)
|
|
|
|
(eval-when-compile (require 'ido))
|
|
(declare-function ido-completing-read+ 'ido-completing-read+)
|
|
|
|
(defvar magit-wip-before-change-mode)
|
|
|
|
;;; Options
|
|
|
|
(defcustom magit-completing-read-function 'magit-builtin-completing-read
|
|
"Function to be called when requesting input from the user.
|
|
|
|
For Helm users, the simplest way to get Helm completion is to
|
|
turn on `helm-mode' and leave this option set to the default
|
|
value. However, if you prefer to not use `helm-mode' but still
|
|
want Magit to use Helm for completion, you can set this option to
|
|
`helm--completing-read-default'."
|
|
:group 'magit
|
|
:type '(radio (function-item magit-builtin-completing-read)
|
|
(function-item magit-ido-completing-read)
|
|
(function-item helm--completing-read-default)
|
|
(function :tag "Other")))
|
|
|
|
(defcustom magit-no-confirm-default nil
|
|
"A list of commands which should just use the default choice.
|
|
|
|
Many commands let the user choose the target they act on offering
|
|
a sensible default as default choice. If you think that that
|
|
default is so sensible that it should always be used without even
|
|
offering other choices, then add that command here.
|
|
|
|
Commands have to explicitly support this option. Currently only
|
|
these commands do:
|
|
`magit-branch'
|
|
`magit-branch-and-checkout'
|
|
`magit-branch-orphan'
|
|
`magit-worktree-branch'
|
|
For these four commands `magit-branch-read-upstream-first'
|
|
must be non-nil, or adding them here has no effect.
|
|
`magit-branch-rename'
|
|
`magit-tag'"
|
|
:package-version '(magit . "2.9.0")
|
|
:group 'magit-commands
|
|
:type '(list :convert-widget custom-hook-convert-widget)
|
|
:options '(magit-branch
|
|
magit-branch-and-checkout
|
|
magit-branch-orphan
|
|
magit-branch-rename
|
|
magit-worktree-branch
|
|
magit-tag))
|
|
|
|
(defconst magit--confirm-actions
|
|
'((const reverse) (const discard)
|
|
(const rename) (const resurrect)
|
|
(const trash) (const delete)
|
|
(const abort-rebase)
|
|
(const abort-merge) (const merge-dirty)
|
|
(const drop-stashes) (const resect-bisect)
|
|
(const kill-process) (const delete-unmerged-branch)
|
|
(const stage-all-changes) (const unstage-all-changes)
|
|
(const safe-with-wip)))
|
|
|
|
(defcustom magit-no-confirm nil
|
|
"A list of symbols for actions Magit should not confirm, or t.
|
|
|
|
Many potentially dangerous commands by default ask the user for
|
|
confirmation. Each of the below symbols stands for an action
|
|
which, when invoked unintentionally or without being fully aware
|
|
of the consequences, could lead to tears. In many cases there
|
|
are several commands that perform variations of a certain action,
|
|
so we don't use the command names but more generic symbols.
|
|
|
|
Applying changes:
|
|
|
|
`discard' Discarding one or more changes (i.e. hunks or the
|
|
complete diff for a file) loses that change, obviously.
|
|
|
|
`reverse' Reverting one or more changes can usually be undone
|
|
by reverting the reversion.
|
|
|
|
`stage-all-changes', `unstage-all-changes' When there are both
|
|
staged and unstaged changes, then un-/staging everything would
|
|
destroy that distinction. Of course that also applies when
|
|
un-/staging a single change, but then less is lost and one does
|
|
that so often that having to confirm every time would be
|
|
unacceptable.
|
|
|
|
Files:
|
|
|
|
`delete' When a file that isn't yet tracked by Git is deleted
|
|
then it is completely lost, not just the last changes. Very
|
|
dangerous.
|
|
|
|
`trash' Instead of deleting a file it can also be move to the
|
|
system trash. Obviously much less dangerous than deleting it.
|
|
|
|
Also see option `magit-delete-by-moving-to-trash'.
|
|
|
|
`resurrect' A deleted file can easily be resurrected by
|
|
\"deleting\" the deletion, which is done using the same command
|
|
that was used to delete the same file in the first place.
|
|
|
|
`rename' Renaming a file can easily be undone.
|
|
|
|
Sequences:
|
|
|
|
`reset-bisect' Aborting (known to Git as \"resetting\") a
|
|
bisect operation loses all information collected so far.
|
|
|
|
`abort-rebase' Aborting a rebase throws away all already
|
|
modified commits, but it's possible to restore those from the
|
|
reflog.
|
|
|
|
`abort-merge' Aborting a merge throws away all conflict
|
|
resolutions which has already been carried out by the user.
|
|
|
|
`merge-dirty' Merging with a dirty worktree can make it hard to
|
|
go back to the state before the merge was initiated.
|
|
|
|
References:
|
|
|
|
`delete-unmerged-branch' Once a branch has been deleted it can
|
|
only be restored using low-level recovery tools provided by
|
|
Git. And even then the reflog is gone. The user always has
|
|
to confirm the deletion of a branch by accepting the default
|
|
choice (or selecting another branch), but when a branch has
|
|
not been merged yet, also make sure the user is aware of that.
|
|
|
|
`drop-stashes' Dropping a stash is dangerous because Git stores
|
|
stashes in the reflog. Once a stash is removed, there is no
|
|
going back without using low-level recovery tools provided by
|
|
Git. When a single stash is dropped, then the user always has
|
|
to confirm by accepting the default (or selecting another).
|
|
This action only concerns the deletion of multiple stashes at
|
|
once.
|
|
|
|
Various:
|
|
|
|
`kill-process' There seldom is a reason to kill a process.
|
|
|
|
Global settings:
|
|
|
|
Instead of adding all of the above symbols to the value of this
|
|
option you can also set it to the atom `t', which has the same
|
|
effect as adding all of the above symbols. Doing that most
|
|
certainly is a bad idea, especially because other symbols might
|
|
be added in the future. So even if you don't want to be asked
|
|
for confirmation for any of these actions, you are still better
|
|
of adding all of the respective symbols individually.
|
|
|
|
When `magit-wip-before-change-mode' is enabled then these actions
|
|
can fairly easily be undone: `discard', `reverse',
|
|
`stage-all-changes', and `unstage-all-changes'. If and only if
|
|
this mode is enabled then `safe-with-wip' has the same effect
|
|
as adding all of these symbols individually."
|
|
:package-version '(magit . "2.1.0")
|
|
:group 'magit
|
|
:group 'magit-commands
|
|
:type `(choice (const :tag "Always require confirmation" nil)
|
|
(const :tag "Never require confirmation" t)
|
|
(set :tag "Require confirmation only for"
|
|
,@magit--confirm-actions)))
|
|
|
|
(defcustom magit-slow-confirm '(drop-stashes)
|
|
"Whether to ask user \"y or n\" or \"yes or no\" questions.
|
|
|
|
When this is nil, then `y-or-n-p' is used when the user has to
|
|
confirm a potentially destructive action. When this is t, then
|
|
`yes-or-no-p' is used instead. If this is a list of symbols
|
|
identifying actions, then `yes-or-no-p' is used for those,
|
|
`y-or-no-p' for all others. The list of actions is the same as
|
|
for `magit-no-confirm' (which see)."
|
|
:package-version '(magit . "2.9.0")
|
|
:group 'magit-commands
|
|
:type `(choice (const :tag "Always ask \"yes or no\" questions" t)
|
|
(const :tag "Always ask \"y or n\" questions" nil)
|
|
(set :tag "Ask yes or no questions only for"
|
|
,@magit--confirm-actions)))
|
|
|
|
(defcustom magit-no-message nil
|
|
"A list of messages Magit should not display.
|
|
|
|
Magit displays most echo area messages using `message', but a few
|
|
are displayed using `magit-message' instead, which takes the same
|
|
arguments as the former, FORMAT-STRING and ARGS. `magit-message'
|
|
forgoes printing a message if any member of this list is a prefix
|
|
of the respective FORMAT-STRING.
|
|
|
|
If Magit prints a message which causes you grief, then please
|
|
first investigate whether there is another option which can be
|
|
used to suppress it. If that is not the case, then ask the Magit
|
|
maintainers to start using `magit-message' instead of `message'
|
|
in that case. We are not proactively replacing all uses of
|
|
`message' with `magit-message', just in case someone *might* find
|
|
some of these messages useless.
|
|
|
|
Messages which can currently be suppressed using this option are:
|
|
* \"Turning on magit-auto-revert-mode...\""
|
|
:package-version '(magit . "2.8.0")
|
|
:group 'magit
|
|
:type '(repeat string))
|
|
|
|
(defcustom magit-ellipsis ?…
|
|
"Character used to abbreviate text."
|
|
:package-version '(magit . "2.1.0")
|
|
:group 'magit-modes
|
|
:type 'character)
|
|
|
|
(defcustom magit-update-other-window-delay 0.2
|
|
"Delay before automatically updating the other window.
|
|
|
|
When moving around in certain buffers certain other buffers,
|
|
which are being displayed in another window, may optionally be
|
|
updated to display information about the section at point.
|
|
|
|
When holding down a key to move by more than just one section,
|
|
then that would update that buffer for each section on the way.
|
|
To prevent that, updating the revision buffer is delayed, and
|
|
this option controls for how long. For optimal experience you
|
|
might have to adjust this delay and/or the keyboard repeat rate
|
|
and delay of your graphical environment or operating system."
|
|
:package-version '(magit . "2.3.0")
|
|
:group 'magit-modes
|
|
:type 'number)
|
|
|
|
;;; User Input
|
|
|
|
(defun magit-completing-read
|
|
(prompt collection &optional predicate require-match initial-input hist def)
|
|
"Magit wrapper around `completing-read' or an alternative function.
|
|
|
|
Option `magit-completing-read-function' can be used to wrap
|
|
around another `completing-read'-like function. Unless it
|
|
doesn't have the exact same signature, an additional wrapper is
|
|
required. Even if it has the same signature it might be a good
|
|
idea to wrap it, so that `magit-prompt-with-default' can be used.
|
|
|
|
See `completing-read' for the meanings of the arguments, but note
|
|
that this wrapper makes the following changes:
|
|
|
|
- If REQUIRE-MATCH is nil and the user exits without a choice,
|
|
then return nil instead of an empty string.
|
|
|
|
- If REQUIRE-MATCH is non-nil and the users exits without a
|
|
choice, then raise an user-error.
|
|
|
|
- \": \" is appended to PROMPT.
|
|
|
|
- If a `magit-completing-read-function' is used which in turn
|
|
uses `magit-prompt-with-completion' and DEF is non-nil, then
|
|
PROMPT is modified to end with \" (default DEF): \".
|
|
|
|
The use of another completing function and/or wrapper obviously
|
|
results in additional differences."
|
|
(let ((reply (funcall magit-completing-read-function
|
|
(concat prompt ": ") collection predicate
|
|
require-match initial-input hist def)))
|
|
(if (string= reply "")
|
|
(if require-match
|
|
(user-error "Nothing selected")
|
|
nil)
|
|
reply)))
|
|
|
|
(defun magit-builtin-completing-read
|
|
(prompt choices &optional predicate require-match initial-input hist def)
|
|
"Magit wrapper for standard `completing-read' function."
|
|
(completing-read (magit-prompt-with-default prompt def)
|
|
choices predicate require-match
|
|
initial-input hist def))
|
|
|
|
(defun magit-ido-completing-read
|
|
(prompt choices &optional predicate require-match initial-input hist def)
|
|
"Ido-based `completing-read' almost-replacement.
|
|
|
|
Unfortunately `ido-completing-read' is not suitable as a
|
|
drop-in replacement for `completing-read', instead we use
|
|
`ido-completing-read+' from the third-party package by the
|
|
same name."
|
|
(if (require 'ido-completing-read+ nil t)
|
|
(ido-completing-read+ prompt choices predicate require-match
|
|
initial-input hist def)
|
|
(display-warning 'magit "ido-completing-read+ is not installed
|
|
|
|
To use Ido completion with Magit you need to install the
|
|
third-party `ido-completing-read+' packages. Falling
|
|
back to built-in `completing-read' for now." :error)
|
|
(magit-builtin-completing-read prompt choices predicate require-match
|
|
initial-input hist def)))
|
|
|
|
(defun magit-prompt-with-default (prompt def)
|
|
(if (and def (> (length prompt) 2)
|
|
(string-equal ": " (substring prompt -2)))
|
|
(format "%s (default %s): " (substring prompt 0 -2) def)
|
|
prompt))
|
|
|
|
(defvar magit-minibuffer-local-ns-map
|
|
(let ((map (make-sparse-keymap)))
|
|
(set-keymap-parent map minibuffer-local-map)
|
|
(define-key map "\s" 'magit-whitespace-disallowed)
|
|
(define-key map "\t" 'magit-whitespace-disallowed)
|
|
map))
|
|
|
|
(defun magit-whitespace-disallowed ()
|
|
"Beep to tell the user that whitespace is not allowed."
|
|
(interactive)
|
|
(ding)
|
|
(message "Whitespace isn't allowed here")
|
|
(setq defining-kbd-macro nil)
|
|
(force-mode-line-update))
|
|
|
|
(defun magit-read-string (prompt &optional initial-input history default-value
|
|
inherit-input-method no-whitespace)
|
|
"Read a string from the minibuffer, prompting with string PROMPT.
|
|
|
|
This is similar to `read-string', but
|
|
* empty input is only allowed if DEFAULT-VALUE is non-nil in
|
|
which case that is returned,
|
|
* whitespace is not allowed if NO-WHITESPACE is non-nil,
|
|
* \": \" is appended to PROMPT, and
|
|
* an invalid DEFAULT-VALUE is silently ignored."
|
|
(when default-value
|
|
(when (consp default-value)
|
|
(setq default-value (car default-value)))
|
|
(unless (stringp default-value)
|
|
(setq default-value nil)))
|
|
(let* ((minibuffer-completion-table nil)
|
|
(val (read-from-minibuffer
|
|
(magit-prompt-with-default (concat prompt ": ") default-value)
|
|
initial-input (and no-whitespace magit-minibuffer-local-ns-map)
|
|
nil history default-value inherit-input-method)))
|
|
(when (and (string= val "") default-value)
|
|
(setq val default-value))
|
|
(cond ((string= val "")
|
|
(user-error "Need non-empty input"))
|
|
((and no-whitespace (string-match-p "[\s\t\n]" val))
|
|
(user-error "Input contains whitespace"))
|
|
(t val))))
|
|
|
|
(defun magit-read-string-ns (prompt &optional initial-input history
|
|
default-value inherit-input-method)
|
|
"Call `magit-read-string' with non-nil NO-WHITESPACE."
|
|
(magit-read-string prompt initial-input history default-value
|
|
inherit-input-method t))
|
|
|
|
(defmacro magit-read-char-case (prompt verbose &rest clauses)
|
|
(declare (indent 2)
|
|
(debug (form form &rest (characterp form body))))
|
|
`(pcase (read-char-choice
|
|
(concat ,prompt
|
|
,(concat (mapconcat 'cadr clauses ", ")
|
|
(and verbose ", or [C-g] to abort") " "))
|
|
',(mapcar 'car clauses))
|
|
,@(--map `(,(car it) ,@(cddr it)) clauses)))
|
|
|
|
(defun magit-y-or-n-p (prompt &optional action)
|
|
"Ask user a \"y or n\" or a \"yes or no\" question using PROMPT.
|
|
Which kind of question is used depends on whether
|
|
ACTION is a member of option `magit-slow-confirm'."
|
|
(if (or (eq magit-slow-confirm t)
|
|
(and action (member action magit-slow-confirm)))
|
|
(yes-or-no-p prompt)
|
|
(y-or-n-p prompt)))
|
|
|
|
(cl-defun magit-confirm (action &optional prompt prompt-n (items nil sitems))
|
|
(declare (indent defun))
|
|
(setq prompt-n (format (concat (or prompt-n prompt) "? ") (length items))
|
|
prompt (format (concat (or prompt (magit-confirm-make-prompt action))
|
|
"? ")
|
|
(car items)))
|
|
(cond ((and (not (eq action t))
|
|
(or (eq magit-no-confirm t)
|
|
(memq action
|
|
`(,@magit-no-confirm
|
|
,@(and magit-wip-before-change-mode
|
|
(memq 'safe-with-wip magit-no-confirm)
|
|
`(discard reverse
|
|
stage-all-changes
|
|
unstage-all-changes))))))
|
|
(or (not sitems) items))
|
|
((not sitems)
|
|
(magit-y-or-n-p prompt action))
|
|
((= (length items) 1)
|
|
(and (magit-y-or-n-p prompt action) items))
|
|
((> (length items) 1)
|
|
(let ((buffer (get-buffer-create " *Magit Confirm*")))
|
|
(with-current-buffer buffer
|
|
(with-current-buffer-window
|
|
buffer (cons 'display-buffer-below-selected
|
|
'((window-height . fit-window-to-buffer)))
|
|
(lambda (window _value)
|
|
(with-selected-window window
|
|
(unwind-protect (and (magit-y-or-n-p prompt-n action) items)
|
|
(when (window-live-p window)
|
|
(quit-restore-window window 'kill)))))
|
|
(dolist (item items)
|
|
(insert item "\n"))))))))
|
|
|
|
(defun magit-confirm-files (action files &optional prompt)
|
|
(when files
|
|
(unless prompt
|
|
(setq prompt (magit-confirm-make-prompt action)))
|
|
(magit-confirm action
|
|
(concat prompt " %s")
|
|
(concat prompt " %i files")
|
|
files)))
|
|
|
|
(defun magit-confirm-make-prompt (action)
|
|
(let ((prompt (symbol-name action)))
|
|
(replace-regexp-in-string
|
|
"-" " " (concat (upcase (substring prompt 0 1)) (substring prompt 1)))))
|
|
|
|
;;; Text Utilities
|
|
|
|
(defmacro magit-bind-match-strings (varlist string &rest body)
|
|
"Bind variables to submatches according to VARLIST then evaluate BODY.
|
|
Bind the symbols in VARLIST to submatches of the current match
|
|
data, starting with 1 and incrementing by 1 for each symbol. If
|
|
the last match was against a string then that has to be provided
|
|
as STRING."
|
|
(declare (indent 2) (debug (listp form body)))
|
|
(let ((s (cl-gensym "string"))
|
|
(i 0))
|
|
`(let ((,s ,string))
|
|
(let ,(save-match-data
|
|
(--map (list it (list 'match-string (cl-incf i) s)) varlist))
|
|
,@body))))
|
|
|
|
(defun magit-delete-line ()
|
|
"Delete the rest of the current line."
|
|
(delete-region (point) (1+ (line-end-position))))
|
|
|
|
(defun magit-delete-match (&optional num)
|
|
"Delete text matched by last search.
|
|
If optional NUM is specified only delete that subexpression."
|
|
(delete-region (match-beginning (or num 0))
|
|
(match-end (or num 0))))
|
|
|
|
(defun magit-file-line (file)
|
|
"Return the first line of FILE as a string."
|
|
(when (file-regular-p file)
|
|
(with-temp-buffer
|
|
(insert-file-contents file)
|
|
(buffer-substring-no-properties (point-min)
|
|
(line-end-position)))))
|
|
|
|
(defun magit-file-lines (file &optional keep-empty-lines)
|
|
"Return a list of strings containing one element per line in FILE.
|
|
Unless optional argument KEEP-EMPTY-LINES is t, trim all empty lines."
|
|
(when (file-regular-p file)
|
|
(with-temp-buffer
|
|
(insert-file-contents file)
|
|
(split-string (buffer-string) "\n" (not keep-empty-lines)))))
|
|
|
|
;;; Kludges
|
|
|
|
(defun magit-file-accessible-directory-p (filename)
|
|
"Like `file-accessible-directory-p' but work around an Apple bug.
|
|
See http://debbugs.gnu.org/cgi/bugreport.cgi?bug=21573#17
|
|
and https://github.com/magit/magit/issues/2295."
|
|
(and (file-directory-p filename)
|
|
(file-accessible-directory-p filename)))
|
|
|
|
(defun magit-message (format-string &rest args)
|
|
"Display a message at the bottom of the screen, or not.
|
|
Like `message', except that if the users configured option
|
|
`magit-no-message' to prevent the message corresponding to
|
|
FORMAT-STRING to be displayed, then don't."
|
|
(unless (--first (string-prefix-p it format-string) magit-no-message)
|
|
(apply #'message format-string args)))
|
|
|
|
(defvar whitespace-mode)
|
|
|
|
(defun whitespace-dont-turn-on-in-magit-mode ()
|
|
"Prevent `whitespace-mode' from being turned on in Magit buffers.
|
|
Because `whitespace-mode' uses font-lock and Magit does not,
|
|
they are not compatible. See `magit-diff-paint-whitespace'
|
|
for an alternative."
|
|
(when (derived-mode-p 'magit-mode)
|
|
(setq whitespace-mode nil)
|
|
(user-error
|
|
"Whitespace-Mode isn't compatible with Magit. %s"
|
|
"See `magit-diff-paint-whitespace' for an alternative.")))
|
|
|
|
(advice-add 'whitespace-turn-on :before
|
|
'whitespace-dont-turn-on-in-magit-mode)
|
|
|
|
;;; magit-utils.el ends soon
|
|
(provide 'magit-utils)
|
|
;; Local Variables:
|
|
;; coding: utf-8
|
|
;; indent-tabs-mode: nil
|
|
;; End:
|
|
;;; magit-utils.el ends here
|