build/autoconf/acoutput-fast.pl
author Jim Blandy <jimb@mozilla.org>
Tue, 26 Aug 2008 14:34:35 -0700
changeset 18461 c397279747fa966ebedd9806d691c7aeede5cbe3
parent 2118 0260a746962eaf14cb6e8817c6a48e17701518a4
child 98529 f4157e8c410708d76703f19e4dfb61859bfe32d8
permissions -rwxr-xr-x
To allow altoptions.m4 to be shared by both the main Mozilla and the SpiderMonkey build code, sincluding it shouldn't have any side effects. Since only Mozilla wants the side effect, move it to Mozilla's aclocal.m4.

#! /usr/bin/env perl
#
# ***** BEGIN LICENSE BLOCK *****
# Version: MPL 1.1/GPL 2.0/LGPL 2.1
#
# The contents of this file are subject to the Mozilla Public License Version
# 1.1 (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
# http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS IS" basis,
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
# for the specific language governing rights and limitations under the
# License.
#
# The Original Code is mozilla.org code.
#
# The Initial Developer of the Original Code is
# Netscape Communications Corporation.
# Portions created by the Initial Developer are Copyright (C) 1999
# the Initial Developer. All Rights Reserved.
#
# Contributor(s):
#
# Alternatively, the contents of this file may be used under the terms of
# either of the GNU General Public License Version 2 or later (the "GPL"),
# or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
# in which case the provisions of the GPL or the LGPL are applicable instead
# of those above. If you wish to allow use of your version of this file only
# under the terms of either the GPL or the LGPL, and not to allow others to
# use your version of this file under the terms of the MPL, indicate your
# decision by deleting the provisions above and replace them with the notice
# and other provisions required by the GPL or the LGPL. If you do not delete
# the provisions above, a recipient may use your version of this file under
# the terms of any one of the MPL, the GPL or the LGPL.
#
# ***** END LICENSE BLOCK *****

# acoutput-fast.pl - Quickly create makefiles that are in a common format.
#
# Most of the makefiles in mozilla only refer to two configure variables:
#     @srcdir@
#     @top_srcdir@
# However, configure does not know any better and it runs sed on each file
# with over 150 replacement rules (slow as molasses).
#
# This script takes a list of makefiles as input. For example,
#   
#     echo $MAKEFILES | acoutput-fast.pl
#
# The script creates each Makefile that only references @srcdir@ and
# @top_srcdir@. For other files, it lists them in a shell command that is
# printed to stdout:
#
#     CONFIG_FILES="unhandled_files..."; export CONFIG_FILES
#
# This command can be used to have config.status create the unhandled
# files. For example,
#
#     eval "echo $MAKEFILES | acoutput-fast.pl"
#     AC_OUTPUT($MAKEFILES)
#
# Send comments, improvements, bugs to Steve Lamm (slamm@netscape.com).

#use File::Basename;
sub dirname {
  my $dir = $_[0];
  return '.' if not $dir =~ m%/%;
  $dir =~ s%/[^/][^/]*$%%;
  return $dir;
}

# Create one directory. Assumes it doesn't already exist.
# Will create parent(s) if needed.
sub create_directory {
  my $dir = $_[0];
  my $parent = dirname($dir);
  create_directory($parent) if not -d $parent;
  mkdir "$dir",0777;
}

# Create all the directories at once.
#   This can be much faster than calling mkdir() for each one.
sub create_directories {
  my @makefiles = @_;
  my @dirs = ();
  my $ac_file;
  foreach $ac_file (@makefiles) {
    push @dirs, dirname($ac_file);
  }
  # Call mkdir with the directories sorted by subdir count (how many /'s)
  if (@dirs) {
    foreach $dir (@dirs) {
      if (not -d $dir) {
        print STDERR "Creating directory $dir\n";
        create_directory($dir);
      }
    }
  }
}

while($arg = shift) {
    if ($arg =~ /^--srcdir=/) {
        $ac_given_srcdir = (split /=/, $arg)[1];
    }
    if ($arg =~ /^--cygwin-srcdir/) {
        $ac_cygwin_srcdir = (split /=/, $arg)[1];
    }
}

if (!$ac_given_srcdir) {
  $ac_given_srcdir = $0;
  $ac_given_srcdir =~ s|/?build/autoconf/.*$||;
  $ac_given_srcdir = '.' if $ac_given_srcdir eq '';
}

if (!$ac_cygwin_srcdir) {
    $ac_cygwin_srcdir = $ac_given_srcdir;
}

# Read list of makefiles from the stdin or,
#   from files listed on the command-line.
#
@makefiles=();
push @makefiles, split while (<STDIN>);

# Create all the directories at once.
#   This can be much faster than calling mkdir() for each one.
create_directories(@makefiles);

# Output the makefiles.
#
@unhandled=();
foreach $ac_file (@makefiles) {
  if (not $ac_file =~ /Makefile$/ or $ac_file =~ /:/) {
    push @unhandled, $ac_file;
    next;
  }
  $ac_file_in = "$ac_given_srcdir/$ac_file.in";
  $ac_dir = dirname($ac_file);
  if ($ac_dir eq '.') {
    $ac_dir_suffix = '';
    $ac_dots = '';
  } else {
    $ac_dir_suffix = "/$ac_dir";
    $ac_dir_suffix =~ s%^/\./%/%;
    $ac_dots = $ac_dir_suffix;
    $ac_dots =~ s%/[^/]*%../%g;
  }
  if ($ac_given_srcdir eq '.') {
    $srcdir = '.';
    if ($ac_dots eq '') {
      $top_srcdir = '.'
    } else {
      $top_srcdir = $ac_dots;
      $top_srcdir =~ s%/$%%;
    }
  } elsif ($ac_cygwin_srcdir =~ m%^/% or $ac_cygwin_srcdir =~ m%^.:/%) {
    $srcdir     = "$ac_cygwin_srcdir$ac_dir_suffix";
    $top_srcdir = "$ac_cygwin_srcdir";
  } else {
    $srcdir     = "$ac_dots$ac_cygwin_srcdir$ac_dir_suffix";
    $top_srcdir = "$ac_dots$ac_cygwin_srcdir";
  }

  if (-e $ac_file) {
    next if -M _ < -M $ac_file_in;
    print STDERR "updating $ac_file\n";
  } else {
    print STDERR "creating $ac_file\n";
  }

  open (INFILE, "<$ac_file_in")
    or ( warn "can't read $ac_file_in: No such file or directory\n" and next);
  open (OUTFILE, ">$ac_file")
    or ( warn "Unable to create $ac_file\n" and next);

  while (<INFILE>) {
    #if (/\@[_a-zA-Z]*\@.*\@[_a-zA-Z]*\@/) {
    #  warn "Two defines on a line:$ac_file:$.:$_";
    #  push @unhandled, $ac_file;
    #  last;
    #}

    s/\@srcdir\@/$srcdir/g;
    s/\@top_srcdir\@/$top_srcdir/g;

    if (/\@[_a-zA-Z]*\@/) {
      warn "Unknown variable:$ac_file:$.:$_";
      push @unhandled, $ac_file;
      last;
    }
    print OUTFILE;
  }
  close INFILE;
  close OUTFILE;
}

# Print the shell command to be evaluated by configure.
#
print "CONFIG_FILES=\"".join(' ', @unhandled)."\"; export CONFIG_FILES\n";