autogen/update_autogen

   1 #!/bin/bash
   2 ### update_autogen - update the generated files in Emacs autogen/ directory
   3
   4 ## Copyright (C) 2011  Free Software Foundation, Inc.
   5
   6 ## Author: Glenn Morris <rgm@gnu.org>
   7
   8 ## This file is part of GNU Emacs.
   9
  10 ## GNU Emacs is free software: you can redistribute it and/or modify
  11 ## it under the terms of the GNU General Public License as published by
  12 ## the Free Software Foundation, either version 3 of the License, or
  13 ## (at your option) any later version.
  14
  15 ## GNU Emacs is distributed in the hope that it will be useful,
  16 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ## GNU General Public License for more details.
  19
  20 ## You should have received a copy of the GNU General Public License
  21 ## along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 ### Commentary:
  24
  25 ## This is a helper script to update the pre-built generated files in
  26 ## the autogen/ directory.  This is suitable for running from cron.
  27 ## Only Emacs maintainers need use this, so it uses bash features.
  28
  29 ### Code:
  30
  31 function die ()                 # write error to stderr and exit
  32 {
  33     [ $# -gt 0 ] && echo "$PN: $@" >&2
  34     exit 1
  35 }
  36
  37 PN=${0##*/}                     # basename of script
  38 PD=${0%/*}
  39
  40 [ "$PD" = "$0" ] && PD=.        # if PATH includes PWD
  41
  42 ## This should be the autogen directory.
  43 cd $PD
  44 cd ../
  45 [ -d autogen ] || die "Could not locate autogen directory"
  46
  47
  48 function usage ()
  49 {
  50     cat 1>&2 <<EOF
  51 Usage: ${PN} [-f] [-c] [-q]
  52 Update the generated files in the Emacs autogen/ directory.
  53 Options:
  54 -f: force an update even if the source files are locally modified.
  55 -c: if the update succeeds and the generated files are modified,
  56     commit them (caution).
  57 -q: be quiet; only give error messages, not status messages.
  58 EOF
  59     exit 1
  60 }
  61
  62
  63 ## Defaults.
  64
  65 force=
  66 commit=
  67 quiet=
  68
  69 ## Parameters.
  70 sources="configure.in lib/Makefile.am"
  71 genfiles="configure aclocal.m4 src/config.in lib/Makefile.in"
  72
  73 for g in $genfiles; do
  74     basegen="$basegen ${g##*/}"
  75 done
  76
  77 [ "$basegen" ] || die "internal error"
  78
  79 tempfile=/tmp/$PN.$$
  80
  81 trap "rm -f $tempfile 2> /dev/null" EXIT
  82
  83
  84 while getopts ":hcfq" option ; do
  85     case $option in
  86         (h) usage ;;
  87
  88         (c) commit=1 ;;
  89
  90         (f) force=1 ;;
  91
  92         (q) quiet=1 ;;
  93
  94         (\?) die "Bad option -$OPTARG" ;;
  95
  96         (:) die "Option -$OPTARG requires an argument" ;;
  97
  98         (*) die "getopts error" ;;
  99     esac
 100 done
 101 shift $(( --OPTIND ))
 102 OPTIND=1
 103
 104 [ $# -eq 0 ] || die "Wrong number of arguments"
 105
 106
 107 function msg ()
 108 {
 109     [ "$quiet" ] && return 0
 110     echo "$@"
 111 }                               # function msg
 112
 113
 114 msg "Running bzr status..."
 115
 116 bzr status -S $sources >| $tempfile || die "bzr status error for sources"
 117
 118 while read stat file; do
 119
 120     case $stat in
 121         M)
 122             msg "Locally modified: $file"
 123             [ "$force" ] || die "There are local modifications"
 124             ;;
 125
 126         *) die "Unexpected status ($stat) for $file" ;;
 127     esac
 128 done < $tempfile
 129
 130
 131 msg "Running autoreconf..."
 132
 133 autoreconf -I m4 || die "autoreconf error"
 134
 135
 136 cp $genfiles autogen/
 137
 138
 139 cd autogen
 140
 141
 142 bzr status -S $basegen >| $tempfile || \
 143     die "bzr status error for generated files"
 144
 145
 146 modified=
 147
 148 while read stat file; do
 149
 150     [ "$stat" != "M" ] && die "Unexpected status ($stat) for generated $file"
 151
 152     modified="$modified $file"
 153
 154 done < $tempfile
 155
 156
 157 [ "$modified" ] || {
 158     msg "No files were modified"
 159     exit 0
 160 }
 161
 162 msg "Modified file(s): $modified"
 163
 164 [ "$commit" ] || exit 0
 165
 166
 167 msg "Committing..."
 168
 169 ## bzr status output is annoyingly always relative to top-level, not PWD.
 170 cd ../
 171
 172 opt=
 173 [ "$quiet" ] || opt=-q
 174
 175 bzr commit $opt -m "Auto-commit of generated files." $modified || \
 176     die "bzr commit error"
 177
 178
 179 msg "Committed files: $modified"
 180
 181 exit
 182
 183 ### update_autogen ends here