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annotate contrib/mq.el @ 2993:425413d9ef59

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Emacs: add mq.el, early support for Mercurial Queues.
author Bryan O'Sullivan <bos@serpentine.com>
date Tue, 22 Aug 2006 16:04:58 -0700
parents
children e2bad806ccc3
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2993
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1 ;;; mq.el --- Emacs support for Mercurial Queues
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2
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3 ;; Copyright (C) 2006 Bryan O'Sullivan
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4
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5 ;; Author: Bryan O'Sullivan <bos@serpentine.com>
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6
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7 ;; mq.el is free software; you can redistribute it and/or modify it
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8 ;; under the terms of version 2 of the GNU General Public License as
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9 ;; published by the Free Software Foundation.
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10
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11 ;; mq.el is distributed in the hope that it will be useful, but
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12 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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13 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 ;; General Public License for more details.
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15
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16 ;; You should have received a copy of the GNU General Public License
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17 ;; along with mq.el, GNU Emacs, or XEmacs; see the file COPYING (`C-h
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18 ;; C-l'). If not, write to the Free Software Foundation, Inc., 59
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19 ;; Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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20
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21 (require 'mercurial)
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22
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23
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24 (defcustom mq-mode-hook nil
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25 "Hook run when a buffer enters mq-mode."
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26 :type 'sexp
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27 :group 'mercurial)
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28
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29 (defcustom mq-global-prefix "\C-cq"
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30 "The global prefix for Mercurial Queues keymap bindings."
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31 :type 'sexp
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32 :group 'mercurial)
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33
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34
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35 ;;; Internal variables.
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36
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37 (defvar mq-patch-history nil)
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38
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39
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40 ;;; Global keymap.
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41
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42 (defvar mq-global-map (make-sparse-keymap))
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43 (fset 'mq-global-map mq-global-map)
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44 (global-set-key mq-global-prefix 'mq-global-map)
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45 (define-key mq-global-map "." 'mq-push)
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46 (define-key mq-global-map ">" 'mq-push-all)
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47 (define-key mq-global-map "," 'mq-pop)
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48 (define-key mq-global-map "<" 'mq-pop-all)
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49 (define-key mq-global-map "r" 'mq-refresh)
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50 (define-key mq-global-map "e" 'mq-refresh-edit)
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51 (define-key mq-global-map "n" 'mq-next)
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52 (define-key mq-global-map "p" 'mq-previous)
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53 (define-key mq-global-map "t" 'mq-top)
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54
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55
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56 ;;; Helper functions.
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57
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58 (defun mq-read-patch-name (&optional source prompt)
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59 "Read a patch name to use with a command.
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60 May return nil, meaning \"use the default\"."
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61 (let ((patches (split-string
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62 (hg-chomp (hg-run0 (or source "qseries"))) "\n")))
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63 (when current-prefix-arg
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64 (completing-read (format "Patch%s: " (or prompt ""))
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65 (map 'list 'cons patches patches)
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66 nil
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67 nil
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68 nil
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69 'mq-patch-history))))
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70
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71 (defun mq-refresh-buffers (root)
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72 (save-excursion
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73 (dolist (buf (hg-buffers-visiting-repo root))
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74 (when (not (verify-visited-file-modtime buf))
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75 (set-buffer buf)
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76 (let ((ctx (hg-buffer-context)))
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77 (message "Refreshing %s..." (buffer-name))
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78 (revert-buffer t t t)
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79 (hg-restore-context ctx)
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80 (message "Refreshing %s...done" (buffer-name))))))
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81 (hg-update-mode-lines root))
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82
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83 (defun mq-last-line ()
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84 (goto-char (point-max))
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85 (beginning-of-line)
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86 (when (looking-at "^$")
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87 (forward-line -1))
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88 (let ((bol (point)))
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89 (end-of-line)
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90 (let ((line (buffer-substring bol (point))))
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91 (when (> (length line) 0)
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92 line))))
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93
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94 (defun mq-push (&optional patch)
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95 "Push patches until PATCH is reached.
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96 If PATCH is nil, push at most one patch."
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97 (interactive (list (mq-read-patch-name "qunapplied" " to push")))
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98 (let ((root (hg-root))
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99 (prev-buf (current-buffer))
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100 last-line ok)
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101 (unless root
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102 (error "Cannot push outside a repository!"))
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103 (hg-sync-buffers root)
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104 (let ((buf-name (format "MQ: Push %s" (or patch "next patch"))))
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105 (kill-buffer (get-buffer-create buf-name))
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106 (split-window-vertically)
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107 (other-window 1)
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108 (switch-to-buffer (get-buffer-create buf-name))
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109 (cd root)
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110 (message "Pushing...")
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111 (setq ok (= 0 (apply 'call-process (hg-binary) nil t t "qpush"
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112 (if patch (list patch))))
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113 last-line (mq-last-line))
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114 (let ((lines (count-lines (point-min) (point-max))))
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115 (if (and (equal lines 2) (string-match "Now at:" last-line))
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116 (progn
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117 (kill-buffer (current-buffer))
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118 (delete-window))
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119 (hg-view-mode prev-buf))))
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120 (mq-refresh-buffers root)
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121 (sit-for 0)
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122 (when last-line
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123 (if ok
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124 (message "Pushing... %s" last-line)
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125 (error "Pushing... %s" last-line)))))
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126
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127 (defun mq-push-all ()
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128 "Push patches until all are applied."
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129 (interactive)
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130 (mq-push "-a"))
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131
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132 (defun mq-pop (&optional patch)
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133 "Pop patches until PATCH is reached.
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134 If PATCH is nil, pop at most one patch."
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135 (interactive (list (mq-read-patch-name "qapplied" " to pop to")))
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136 (let ((root (hg-root))
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137 last-line ok)
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138 (unless root
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139 (error "Cannot pop outside a repository!"))
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140 (hg-sync-buffers root)
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141 (set-buffer (generate-new-buffer "qpop"))
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142 (cd root)
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143 (message "Popping...")
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144 (setq ok (= 0 (apply 'call-process (hg-binary) nil t t "qpop"
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145 (if patch (list patch))))
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146 last-line (mq-last-line))
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147 (kill-buffer (current-buffer))
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148 (mq-refresh-buffers root)
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149 (sit-for 0)
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150 (when last-line
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151 (if ok
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152 (message "Popping... %s" last-line)
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153 (error "Popping... %s" last-line)))))
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154
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155 (defun mq-pop-all ()
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156 "Push patches until none are applied."
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157 (interactive)
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158 (mq-pop "-a"))
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159
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160 (defun mq-refresh ()
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161 "Refresh the topmost applied patch."
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162 (interactive)
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163 (let ((root (hg-root)))
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164 (unless root
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165 (error "Cannot refresh outside a repository!"))
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166 (hg-sync-buffers root)
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167 (message "Refreshing patch...")
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168 (let ((ret (hg-run "qrefresh")))
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169 (if (equal (car ret) 0)
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170 (message "Refreshing patch... done.")
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171 (error "Refreshing patch... %s" (hg-chomp (cdr ret)))))))
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172
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173 (defun mq-patch-info (msg cmd)
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174 (let ((ret (hg-run cmd)))
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175 (if (equal (car ret) 0)
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176 (message "%s %s" msg (hg-chomp (cdr ret)))
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177 (error "%s" (cdr ret)))))
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178
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179 (defun mq-top ()
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180 "Print the name of the topmost applied patch."
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181 (interactive)
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182 (mq-patch-info "Top patch is " "qtop"))
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183
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184 (defun mq-next ()
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185 "Print the name of the next patch to be pushed."
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186 (interactive)
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187 (mq-patch-info "Next patch is " "qnext"))
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188
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189 (defun mq-previous ()
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190 "Print the name of the first patch below the topmost applied patch.
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191 This would become the active patch if popped to."
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192 (interactive)
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193 (mq-patch-info "Previous patch is " "qprev"))
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194
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195 (defun mq-refresh-edit ()
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196 "Refresh the topmost applied patch, editing the patch description."
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197 (interactive)
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198 (error "Not yet implemented"))
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199
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200
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201 (provide 'mq)
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202
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203
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204 ;;; Local Variables:
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205 ;;; prompt-to-byte-compile: nil
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206 ;;; end: