gnu/dist/diffutils/exgettext

   1 #! /bin/sh
   2 # Wrapper around gettext for programs using the msgid convention.
   3
   4 # Copyright (C) 1998, 2001 Free Software Foundation, Inc.
   5
   6 # Written by Paul Eggert <eggert@twinsun.com>.
   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=${AWK-awk}
  31
  32 # The argument to this wrapper is the xgettext command to be executed.
  33 # Extract the xgettext program name from the rest of the command.
  34 xgettext=${1?}
  35 shift
  36
  37 # Save work if we're just wrapping a no-op.
  38 case $xgettext in
  39 :) exit;;
  40 esac
  41
  42 # Find the files to be scanned, and the directory to scan them from.
  43 directory=.
  44 files=
  45 for i
  46 do
  47   case $i in
  48   --directory=*)
  49     directory=`expr " $i" : ' --directory=\(.*\)'`;;
  50   --files-from=*)
  51     files_from=`expr " $i" : ' --files-from=\(.*\)'`
  52     files=`$AWK '/^[^#]/ { print }' $files_from`;;
  53   esac
  54 done
  55
  56 # Generate keyword options for xgettext,
  57 # by scanning for declarations of functions
  58 # whose parameter names end in "msgid".
  59 generate_keyword_options='
  60   /^[A-Z_a-z].*\(.*msgid[,)]/ {
  61
  62     paren_index = index($0, "(")
  63
  64     name = substr($0, 1, paren_index - 1)
  65     sub(/[^0-9A-Z_a-z]*$/, "", name)
  66     sub(/[       ]+PARAMS/, "", name)
  67     sub(/[       ]+VPARAMS/, "", name)
  68     sub(/.*[^0-9A-Z_a-z]/, "", name)
  69
  70     args = substr($0, paren_index)
  71     sub(/msgid[,)].*/, "", args)
  72     for (n = 1; sub(/^[^,]*,/, "", args); n++) {
  73       continue;
  74     }
  75
  76     if (n == 1) {
  77       keyword = name
  78     } else {
  79       keyword = name ":" n
  80     }
  81
  82     if (! keyword_seen[keyword]++) {
  83       print "--keyword=" keyword
  84     }
  85   }
  86 '
  87 keyword_options=`(
  88   cd $directory &&
  89   $AWK "$generate_keyword_options" $files < /dev/null
  90 )` || exit
  91
  92 # Generate temporary file reflecting the %e strings in the scanned files.
  93 tmp=tmp-emsgids.c
  94
  95 generate_emsgids='
  96   /%e.*}/ {
  97     line = $0
  98     while ((percent_index = index(line, "%e")) != 0) {
  99       line = substr(line, percent_index + 2)
 100       bracket_index = index(line, "}")
 101       if (bracket_index == 0) {
 102         continue
 103       }
 104       msgid = substr(line, 1, bracket_index - 1)
 105       if (index(msgid, "%") != 0) {
 106         continue
 107       }
 108       printf "#line %d \"%s\"\n", FNR, FILENAME
 109       printf "_(\"%s\")\n", msgid
 110       line = substr(line, bracket_index + 1)
 111     }
 112   }
 113 '
 114 (cd $directory &&
 115  $AWK "$generate_emsgids" $files < /dev/null
 116 ) > $directory/$tmp || exit
 117
 118 # Run the xgettext command, with temporary added as a file to scan.
 119 "$xgettext" $keyword_options ${1+"$@"} $tmp || exit
 120
 121 # Clean up.
 122 # If we don't get here, `make clean' will remove this file later.
 123 rm -f $directory/$tmp