gecko-dev/build/autoconf/acoutput-fast.pl

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Perl
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#! /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) {
my $mkdir_command = "mkdir -p ". join(' ', @dirs);
if (system($mkdir_command) != 0) {
print STDERR "Creating dirs all at once failed; trying one at atime\n";
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";