build-aux/gitlog-to-emacslog

   1 #!/bin/sh
   2
   3 # Convert git log output to ChangeLog format for GNU Emacs.
   4
   5 # Copyright (C) 2014-2015 Free Software Foundation, Inc.
   6
   7 # Author: Paul Eggert
   8
   9 # This program is free software: you can redistribute it and/or modify
  10 # it under the terms of the GNU General Public License as published by
  11 # the Free Software Foundation, either version 3 of the License, or
  12 # (at your option) any later version.
  13
  14 # This program is distributed in the hope that it will be useful,
  15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 # GNU General Public License for more details.
  18
  19 # You should have received a copy of the GNU General Public License
  20 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21
  22 LC_ALL=C
  23 export LC_ALL
  24
  25 # The newest revision that should not appear in the generated ChangeLog.
  26 gen_origin=2c1b8604946efbcd8ec5dd6c6dda7541ce4fc3c0
  27 force=
  28 output=ChangeLog
  29
  30 while [ $# -gt 0 ]; do
  31   case "$1" in
  32       -g|--gen-origin) gen_origin="$2" ; shift ;;
  33       -f|--force) force=1 ;;
  34       -o|--output) output="$2" ; shift ;;
  35       *) echo "Unrecognized argument: $1" >&2; exit 1 ;;
  36   esac
  37   shift
  38 done
  39
  40 if [ -f "${distprefix}$output" ]; then
  41     [ ! "$force" ] && echo "${distprefix}$output exists" && exit 1
  42     rm -f "${distprefix}$output" || exit 1
  43 fi
  44
  45 # If this is not a Git repository, just generate an empty ChangeLog.
  46 test -d ${srcprefix}.git || {
  47   >"${distprefix}$output"
  48   exit
  49 }
  50
  51 # Use Gnulib's packaged ChangeLog generator.
  52 ${srcprefix}build-aux/gitlog-to-changelog --ignore-matching='^; ' \
  53   --format='%B' \
  54   "$gen_origin.." >"${distprefix}ChangeLog.tmp" || exit
  55
  56 if test -s "${distprefix}ChangeLog.tmp"; then
  57
  58   # Fix up bug references.
  59   # This would be better as eg a --transform option to gitlog-to-changelog,
  60   # but... effort.  FIXME does not handle rare cases like:
  61   # Fixes: debbugs:19434 debbugs:19519
  62   sed 's/       Fixes: \(debbugs:\|bug#\)\([0-9][0-9]*\)/       (Bug#\2)/' \
  63       "${distprefix}ChangeLog.tmp" > "${distprefix}ChangeLog.tmp2"
  64   mv "${distprefix}ChangeLog.tmp2" "${distprefix}ChangeLog.tmp"
  65
  66   # Find the years covered by the generated ChangeLog, so that
  67   # a proper copyright notice can be output.
  68   years=`
  69     sed -n 's/^\([0-9][0-9]*\).*/\1/p' "${distprefix}ChangeLog.tmp" |
  70     sort -nu
  71   `
  72   start_year=
  73   end_year=
  74   for year in $years; do
  75     : ${start_year:=$year}
  76     end_year=$year
  77   done
  78
  79   if test "$start_year" = "$end_year"; then
  80     year_range=$start_year
  81   else
  82     year_range=$start_year-$end_year
  83   fi
  84
  85   # Append a proper copyright notice.
  86   sed -n '
  87     1i\
  88
  89     /^See ChangeLog.1 for earlier/,${
  90        s/ChangeLog\.1/ChangeLog.2/
  91        s/\(Copyright[ (C)]*\)[0-9]*-[0-9]*/\1'"$year_range"'/
  92        p
  93     }
  94   ' <ChangeLog.2 >>"${distprefix}ChangeLog.tmp" || exit
  95 fi
  96
  97 # Install the generated ChangeLog.
  98 test "$output" = "ChangeLog.tmp" || \
  99   mv -i "${distprefix}ChangeLog.tmp" "${distprefix}$output"