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

180 lines
4.9 KiB
Perl
Executable File

#! /usr/bin/env perl
#
# The contents of this file are subject to the Netscape 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/NPL/
#
# 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 Netscape are
# Copyright (C) 1999 Netscape Communications Corporation. All
# Rights Reserved.
#
# Contributor(s):
#
# 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);
}
}
}
}
}
if ($ARGV[0] =~ /^--srcdir=/) {
$ac_given_srcdir = (split /=/, shift @ARGV)[1];
} else {
$ac_given_srcdir = $0;
$ac_given_srcdir =~ s|/?build/autoconf/.*$||;
$ac_given_srcdir = '.' if $ac_given_srcdir eq '';
}
# 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_given_srcdir =~ m%^/% or $ac_given_srcdir =~ m%^.:/%) {
$srcdir = "$ac_given_srcdir$ac_dir_suffix";
$top_srcdir = "$ac_given_srcdir";
} else {
$srcdir = "$ac_dots$ac_given_srcdir$ac_dir_suffix";
$top_srcdir = "$ac_dots$ac_given_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";