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a5b49f45d6
(&verbose): Remove. (&getopt): Adjust the note and verb channels, depending upon --verbose. * bin/autoheader.in, bin/autom4te.in, bin/autoscan.in, * bin/autoupdate.in: Adjust. Use &verb, not &verbose.
431 lines
9.0 KiB
Perl
431 lines
9.0 KiB
Perl
# autoconf -- create `configure' using m4 macros
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# Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2, or (at your option)
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# any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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# 02111-1307, USA.
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package Autom4te::General;
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=head1 NAME
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Autom4te::General - general support functions for Autoconf and Automake
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=head1 SYNOPSIS
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use Autom4te::General
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=head1 DESCRIPTION
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This perl module provides various general purpose support functions
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used in several executables of the Autoconf and Automake packages.
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=cut
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use 5.005_03;
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use Exporter;
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use Autom4te::ChannelDefs;
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use Autom4te::Channels;
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use File::Basename;
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use File::stat;
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use IO::File;
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use Carp;
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use strict;
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use vars qw (@ISA @EXPORT);
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@ISA = qw (Exporter);
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# Variables we define and export.
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my @export_vars =
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qw ($debug $force $help $me $tmp $verbose $version);
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# Functions we define and export.
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my @export_subs =
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qw (&debug
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&getopt &mktmpdir
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&uniq);
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# Functions we forward (coming from modules we use).
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my @export_forward_subs =
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qw (&basename &dirname &fileparse);
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@EXPORT = (@export_vars, @export_subs, @export_forward_subs);
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# Variable we share with the main package. Be sure to have a single
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# copy of them: using `my' together with multiple inclusion of this
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# package would introduce several copies.
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=head2 Global Variables
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=over 4
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=item C<$debug>
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Set this variable to 1 if debug messages should be enabled. Debug
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messages are meant for developpers only, or when tracking down an
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incorrect execution.
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=cut
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use vars qw ($debug);
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$debug = 0;
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=item C<$force>
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Set this variable to 1 to recreate all the files, or to consider all
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the output files are obsolete.
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=cut
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use vars qw ($force);
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$force = undef;
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=item C<$help>
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Set to the help message associated to the option C<--help>.
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=cut
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use vars qw ($help);
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$help = undef;
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=item C<$me>
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The name of this application, as should be used in diagostic messages.
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=cut
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use vars qw ($me);
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$me = basename ($0);
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=item C<$tmp>
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The name of the temporary directory created by C<mktmpdir>. Left
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C<undef> otherwise.
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=cut
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# Our tmp dir.
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use vars qw ($tmp);
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$tmp = undef;
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=item C<$verbose>
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Enable verbosity messages. These messages are meant for ordinary
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users, and typically make explicit the steps being performed.
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=cut
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use vars qw ($verbose);
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$verbose = 0;
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=item C<$version>
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Set to the version message associated to the option C<--version>.
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=cut
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use vars qw ($version);
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$version = undef;
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=back
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=cut
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## ----- ##
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## END. ##
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## ----- ##
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=head2 Functions
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=over 4
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=item C<END>
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Filter Perl's exit codes, delete any temporary directory (unless
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C<$debug>), and exit nonzero whenever closing C<STDOUT> fails.
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=cut
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# END
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# ---
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sub END
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{
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# $? contains the exit status we will return.
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# It was set using one of the following ways:
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#
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# 1) normal termination
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# this sets $? = 0
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# 2) calling `exit (n)'
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# this sets $? = n
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# 3) calling die or friends (croak, confess...):
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# a) when $! is non-0
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# this set $? = $!
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# b) when $! is 0 but $? is not
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# this sets $? = ($? >> 8) (i.e., the exit code of the
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# last program executed)
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# c) when both $! and $? are 0
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# this sets $? = 255
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#
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# Cases 1), 2), and 3b) are fine, but we prefer $? = 1 for 3a) and 3c).
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$? = 1 if ($! && $! == $?) || $? == 255;
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# (Note that we cannot safely distinguish calls to `exit (n)'
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# from calls to die when `$! = n'. It's not big deal because
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# we only call `exit (0)' or `exit (1)'.)
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if (!$debug && defined $tmp && -d $tmp)
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{
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if (<$tmp/*>)
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{
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if (! unlink <$tmp/*>)
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{
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print STDERR "$me: cannot empty $tmp: $!\n";
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$? = 1;
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return;
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}
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}
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if (! rmdir $tmp)
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{
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print STDERR "$me: cannot remove $tmp: $!\n";
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$? = 1;
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return;
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}
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}
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# This is required if the code might send any output to stdout
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# E.g., even --version or --help. So it's best to do it unconditionally.
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if (! close STDOUT)
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{
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print STDERR "$me: closing standard output: $!\n";
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$? = 1;
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return;
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}
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}
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## ----------- ##
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## Functions. ##
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## ----------- ##
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=item C<debug (@message)>
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If the debug mode is enabled (C<$debug> and C<$verbose>), report the
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C<@message> on C<STDERR>, signed with the name of the program.
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=cut
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# &debug(@MESSAGE)
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# ----------------
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# Messages displayed only if $DEBUG and $VERBOSE.
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sub debug (@)
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{
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print STDERR "$me: ", @_, "\n"
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if $verbose && $debug;
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}
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=item C<getopt (%option)>
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Wrapper around C<Getopt::Long>. In addition to the user C<option>s,
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support C<-h>/C<--help>, C<-V>/C<--version>, C<-v>/C<--verbose>,
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C<-d>/C<--debug>, C<-f>/C<--force>. Conform to the GNU Coding
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Standards for error messages. Try to work around a weird behavior
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from C<Getopt::Long> to preserve C<-> as an C<@ARGV> instead of
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rejecting it as a broken option.
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=cut
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# getopt (%OPTION)
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# ----------------
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# Handle the %OPTION, plus all the common options.
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# Work around Getopt bugs wrt `-'.
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sub getopt (%)
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{
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my (%option) = @_;
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use Getopt::Long;
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# F*k. Getopt seems bogus and dies when given `-' with `bundling'.
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# If fixed some day, use this: '' => sub { push @ARGV, "-" }
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my $stdin = grep /^-$/, @ARGV;
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@ARGV = grep !/^-$/, @ARGV;
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%option = ("h|help" => sub { print $help; exit 0 },
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"V|version" => sub { print $version; exit 0 },
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"v|verbose" => \$verbose,
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"d|debug" => \$debug,
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'f|force' => \$force,
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# User options last, so that they have precedence.
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%option);
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Getopt::Long::Configure ("bundling", "pass_through");
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GetOptions (%option)
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or exit 1;
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foreach (grep { /^-./ } @ARGV)
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{
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print STDERR "$0: unrecognized option `$_'\n";
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print STDERR "Try `$0 --help' for more information.\n";
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exit (1);
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}
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push @ARGV, '-'
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if $stdin;
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setup_channel 'note', silent => !$verbose;
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setup_channel 'verb', silent => !$verbose;
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}
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=item C<mktmpdir ($signature)>
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Create a temporary directory which name is based on C<$signature>.
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Store its name in C<$tmp>. C<END> is in charge of removing it, unless
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C<$debug>.
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=cut
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# mktmpdir ($SIGNATURE)
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# ---------------------
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sub mktmpdir ($)
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{
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my ($signature) = @_;
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my $TMPDIR = $ENV{'TMPDIR'} || '/tmp';
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# If mktemp supports dirs, use it.
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$tmp = `(umask 077 &&
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mktemp -d -q "$TMPDIR/${signature}XXXXXX") 2>/dev/null`;
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chomp $tmp;
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if (!$tmp || ! -d $tmp)
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{
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$tmp = "$TMPDIR/$signature" . int (rand 10000) . ".$$";
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mkdir $tmp, 0700
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or croak "$me: cannot create $tmp: $!\n";
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}
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print STDERR "$me:$$: working in $tmp\n"
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if $debug;
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}
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=item C<uniq (@list)>
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Return C<@list> with no duplicates, keeping only the first
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occurrences.
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=cut
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# @RES
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# uniq (@LIST)
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# ------------
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sub uniq (@)
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{
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my @res = ();
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my %seen = ();
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foreach my $item (@_)
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{
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if (! exists $seen{$item})
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{
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$seen{$item} = 1;
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push (@res, $item);
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}
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}
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return wantarray ? @res : "@res";
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}
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=item C<handle_exec_errors ($command)>
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Display an error message for C<$command>, based on the content of
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C<$?> and C<$!>.
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=cut
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# handle_exec_errors ($COMMAND)
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# -----------------------------
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sub handle_exec_errors ($)
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{
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my ($command) = @_;
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$command = (split (' ', $command))[0];
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if ($!)
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{
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error "failed to run $command: $!";
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}
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else
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{
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use POSIX qw (WIFEXITED WEXITSTATUS WIFSIGNALED WTERMSIG);
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if (WIFEXITED ($?))
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{
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my $status = WEXITSTATUS ($?);
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# WIFEXITED and WEXITSTATUS can alter $!, reset it so that
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# error() actually propagates the command's exit status, not $!.
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$! = 0;
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error "$command failed with exit status: $status";
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}
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elsif (WIFSIGNALED ($?))
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{
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my $signal = WTERMSIG ($?);
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# In this case we prefer to exit with status 1.
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$! = 1;
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error "$command terminated by signal: $signal";
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}
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else
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{
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error "$command exited abnormally";
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}
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}
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}
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=back
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=head1 SEE ALSO
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L<Autom4te::XFile>
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=head1 HISTORY
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Written by Alexandre Duret-Lutz E<lt>F<adl@gnu.org>E<gt> and Akim
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Demaille E<lt>F<akim@freefriends.org>E<gt>.
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=cut
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1; # for require
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### Setup "GNU" style for perl-mode and cperl-mode.
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## Local Variables:
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## perl-indent-level: 2
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## perl-continued-statement-offset: 2
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## perl-continued-brace-offset: 0
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## perl-brace-offset: 0
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## perl-brace-imaginary-offset: 0
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## perl-label-offset: -2
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## cperl-indent-level: 2
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## cperl-brace-offset: 0
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## cperl-continued-brace-offset: 0
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## cperl-label-offset: -2
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## cperl-extra-newline-before-brace: t
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## cperl-merge-trailing-else: nil
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## cperl-continued-statement-offset: 2
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## End:
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