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 test -n "$1" && test "$1" != "." && gen_origin=$1
  28
  29 output=$2
  30 test -n "$output" || output=ChangeLog
  31
  32 # If this is not a Git repository, just generate an empty ChangeLog.
  33 test -d ${srcprefix}.git || {
  34   # Remove any old ChangeLog, in case it is a vc-dwim symlink.
  35   rm -f "${distprefix}$output" || exit
  36   >"${distprefix}$output"
  37   exit
  38 }
  39
  40 # Use Gnulib's packaged ChangeLog generator.
  41 ${srcprefix}build-aux/gitlog-to-changelog --ignore-matching='^; ' \
  42   --format='%B' \
  43   "$gen_origin.." >"${distprefix}ChangeLog.tmp" || exit
  44
  45 if test -s "${distprefix}ChangeLog.tmp"; then
  46
  47   # Fix up bug references.
  48   # This would be better as eg a --transform option to gitlog-to-changelog,
  49   # but... effort.  FIXME does not handle rare cases like:
  50   # Fixes: debbugs:19434 debbugs:19519
  51   sed 's/       Fixes: \(debbugs:\|bug#\)\([0-9][0-9]*\)/       (Bug#\2)/' \
  52       "${distprefix}ChangeLog.tmp" > "${distprefix}ChangeLog.tmp2"
  53   mv "${distprefix}ChangeLog.tmp2" "${distprefix}ChangeLog.tmp"
  54
  55   # Find the years covered by the generated ChangeLog, so that
  56   # a proper copyright notice can be output.
  57   years=`
  58     sed -n 's/^\([0-9][0-9]*\).*/\1/p' "${distprefix}ChangeLog.tmp" |
  59     sort -nu
  60   `
  61   start_year=
  62   end_year=
  63   for year in $years; do
  64     : ${start_year:=$year}
  65     end_year=$year
  66   done
  67
  68   if test "$start_year" = "$end_year"; then
  69     year_range=$start_year
  70   else
  71     year_range=$start_year-$end_year
  72   fi
  73
  74   # Append a proper copyright notice.
  75   sed -n '
  76     1i\
  77
  78     /^;; Local Variables:/,${
  79        s/\(Copyright[ (C)]*\)[0-9]*-[0-9]*/\1'"$year_range"'/
  80        p
  81     }
  82   ' <ChangeLog.2 >>"${distprefix}ChangeLog.tmp" || exit
  83 fi
  84
  85 # Install the generated ChangeLog.
  86 test "$output" = "ChangeLog.tmp" || \
  87   mv -i "${distprefix}ChangeLog.tmp" "${distprefix}$output"