gcc/po/exgettext

   1 #! /bin/sh
   2 # Wrapper around gettext for programs using the msgid convention.
   3 # Copyright 1998, 2001, 2002 Free Software Foundation, Inc.
   4
   5 # Written by Paul Eggert <eggert@twinsun.com>.
   6 # Revised by Zack Weinberg <zackw@stanford.edu> for no-POTFILES operation.
   7
   8 # This program is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 2, or (at your option)
  11 # any later version.
  12
  13 # This program is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17
  18 # You should have received a copy of the GNU General Public License
  19 # along with GNU CC; see the file COPYING.  If not, write to
  20 # the Free Software Foundation, 59 Temple Place - Suite 330,
  21 # Boston, MA 02111-1307, USA.
  22
  23 # Always operate in the C locale.
  24 LANG=C
  25 LANGUAGE=C
  26 LC_ALL=C
  27 export LANG LANGUAGE LC_ALL
  28
  29 # Set AWK if environment has not already set it.
  30 AWK=${AWK-awk}
  31
  32 # The arguments to this wrapper are: the program to execute, the
  33 # name of the "package", and the path to the source directory.
  34
  35 if [ $# -ne 3 ]
  36 then    echo "usage: $0 <xgettext> <package> <srcdir>"
  37         exit 1
  38 fi
  39
  40 xgettext=$1
  41 package=$2
  42 srcdir=$3
  43
  44 nl='
  45 '
  46
  47 set -e
  48
  49 # Create temporary directory for scratch files.
  50 T=exg$$.d
  51 mkdir $T
  52 trap "rm -r $T" 0
  53
  54 pwd=`${PWDCMD-pwd}`
  55 kopt=$pwd/$T/keyword-options
  56 emsg=$pwd/$T/emsgids.c
  57 posr=$pwd/$T/po-sources
  58
  59 # Locate files to scan, and generate the list.  All .c, .h, and .def files
  60 # in $srcdir are examined, likewise $srcdir/config and $srcdir/config/*
  61 # (directories).  Also, all subdirectories of $srcdir that contain a
  62 # config-lang.in.  Exclusions come from $srcdir/po/EXCLUDE.
  63 #
  64 # Then generate keyword options for xgettext, by scanning for declarations
  65 # of functions whose parameter names end in "msgid".
  66 #
  67 # Finally, generate a source file containing all %e strings from
  68 # driver specs, so those can be translated too.
  69 #
  70 # All in one huge awk script.
  71
  72 echo "scanning for keywords and %e strings..." >&2
  73
  74 ( cd $srcdir
  75   lang_subdirs=`echo */config-lang.in | sed -e 's|config-lang\.in||g'`
  76   for dir in "" config/ config/*/ $lang_subdirs
  77   do  for glob in '*.c' '*.h' '*.def'
  78       do  eval echo $dir$glob
  79       done
  80   done | tr ' ' "$nl" | grep -v '\*' |
  81   $AWK -v excl=po/EXCLUDES -v posr=$posr -v kopt=$kopt -v emsg=$emsg '
  82 function keyword_option(line) {
  83     paren_index = index(line, "(")
  84     name = substr(line, 1, paren_index - 1)
  85     sub(/[^0-9A-Z_a-z]*$/, "", name)
  86     sub(/[       ]+PARAMS/, "", name)
  87     sub(/[       ]+VPARAMS/, "", name)
  88     sub(/.*[^0-9A-Z_a-z]/, "", name)
  89
  90     args = substr(line, paren_index)
  91     sub(/msgid[,\)].*/, "", args)
  92     for (n = 1; sub(/^[^,]*,/, "", args); n++) {
  93         continue
  94     }
  95
  96     if (n == 1) { keyword = name }
  97     else        { keyword = name ":" n }
  98
  99     if (! keyword_seen[keyword]++) {
 100         print "--keyword=" keyword > kopt
 101     }
 102 }
 103
 104 function spec_error_string (line) {
 105     while ((percent_index = index(line, "%e")) != 0) {
 106         escape = substr(line, percent_index - 1, 1)
 107         line = substr(line, percent_index + 2)
 108         if (escape == "%") return
 109
 110         bracket_index = index(line, "}")
 111         if (bracket_index == 0) return
 112
 113         msgid = substr(line, 1, bracket_index - 1)
 114         if (index(msgid, "%") != 0) return
 115
 116         printf("#line %d \"%s\"\n", lineno, file) > emsg
 117         printf("_(\"%s\")\n", msgid) > emsg
 118
 119         line = substr(line, bracket_index + 1)
 120     }
 121 }
 122
 123 BEGIN {
 124   while ((getline < excl) > 0) {
 125     if ($0 ~ /^#/ || $0 ~ /^[   ]*$/)
 126       continue
 127     excludes[$1] = 1
 128   }
 129 }
 130
 131 { if (!($0 in excludes)) {
 132     print > posr
 133     files[NR] = $0
 134   }
 135 }
 136
 137 END {
 138     for (f in files) {
 139         file = files[f]
 140         lineno = 1
 141         while (getline < file) {
 142             if (/^(#[   ]*define[       ]*)?[A-Za-z_].*\(.*msgid[,\)]/) {
 143                 keyword_option($0)
 144             } else if (/%e/) {
 145                 spec_error_string($0)
 146             }
 147             lineno++
 148         }
 149     }
 150     print emsg > posr
 151 }'
 152 )
 153
 154 # Run the xgettext command, with temporary added as a file to scan.
 155 echo "running xgettext..." >&2
 156 $xgettext --default-domain=$package --directory=$srcdir \
 157           --add-comments `cat $kopt` --files-from=$posr \
 158           --language=c -o po/$package.pot