# $File: //member/autrijus/ExtUtils-AutoInstall/lib/ExtUtils/AutoInstall.pm $
# $Revision: 1.1 $ $Change: 8105 $ $DateTime: 2003/09/13 20:57:40 $
package ExtUtils::AutoInstall;
$ExtUtils::AutoInstall::VERSION = '0.54';
use strict;
use Cwd;
use ExtUtils::MakeMaker ();
=head1 NAME
ExtUtils::AutoInstall - Automatic install of dependencies via CPAN
=head1 VERSION
This document describes version 0.54 of B<ExtUtils::AutoInstall>,
released September 14, 2003.
=head1 SYNOPSIS
In F<Makefile.PL>:
# ExtUtils::AutoInstall Bootstrap Code, version 7.
BEGIN{my$p='ExtUtils::AutoInstall';my$v=0.45;$p->VERSION||0>=$v
or+eval"use $p $v;1"or+do{my$e=$ENV{PERL_EXTUTILS_AUTOINSTALL};
(!defined($e)||$e!~m/--(?:default|skip|testonly)/and-t STDIN or
eval"use ExtUtils::MakeMaker;WriteMakefile(PREREQ_PM=>{'$p',$v}
);1"and exit)and print"==> $p $v required. Install it from CP".
"AN? [Y/n] "and<STDIN>!~/^n/i and print"*** Installing $p\n"and
do{if (eval '$>' and lc(`sudo -V`) =~ /version/){system('sudo',
$^X,"-MCPANPLUS","-e","CPANPLUS::install $p");eval"use $p $v;1"
||system('sudo', $^X, "-MCPAN", "-e", "CPAN::install $p")}eval{
require CPANPLUS;CPANPLUS::install$p};eval"use $p $v;1"or eval{
require CPAN;CPAN::install$p};eval"use $p $v;1"||die"*** Please
manually install $p $v from cpan.org first...\n"}}}
# optional pre-install handler; takes $module_name and $version
# sub MY::preinstall { return 1; } # return false to skip install
# optional post-install handler; takes $module_name, $version, $success
# sub MY::postinstall { return; } # the return value doesn't matter
# the above handlers must be declared before the 'use' statement
use ExtUtils::AutoInstall (
-version => '0.40', # required AutoInstall version
# usually 0.40 is sufficient
-config => {
make_args => '--hello', # option(s) for CPAN::Config
force => 1, # pseudo-option to force install
do_once => 1, # skip previously failed modules
},
-core => [ # core modules; may also be 'all'
Package0 => '', # any version would do
],
'Feature1' => [
# do we want to install this feature by default?
-default => ( system('feature1 --version') == 0 ),
Package1 => '0.01',
],
'Feature2' => [
# associate tests to be disabled if this feature is missing
-tests => [ <t/feature2*.t> ],
# associate tests to be disabled if this feature is present
-skiptests => [ <t/nofeature2*.t> ],
Package2 => '0.02',
],
'Feature3' => { # hash reference works, too
# force installation even if tests fail
Package3 => '0.03',
}
);
WriteMakefile(
AUTHOR => 'Joe Hacker (joe@hacker.org)',
ABSTRACT => 'Perl Interface to Joe Hacker',
NAME => 'Joe::Hacker',
VERSION_FROM => 'Hacker.pm',
DISTNAME => 'Joe-Hacker',
);
Invoking the resulting F<Makefile.PL>:
% perl Makefile.PL # interactive behaviour
% perl Makefile.PL --defaultdeps # accept default value on prompts
% perl Makefile.PL --checkdeps # check only, no Makefile produced
% perl Makefile.PL --skipdeps # ignores all dependencies
% perl Makefile.PL --testonly # don't write installation targets
Note that the trailing 'deps' of arguments may be omitted, too.
Using F<make> (or F<nmake>):
% make [all|test|install] # install dependencies first
% make checkdeps # same as the --checkdeps above
% make installdeps # install dependencies only
=head1 DESCRIPTION
B<ExtUtils::AutoInstall> lets module writers to specify a more
sophisticated form of dependency information than the C<PREREQ_PM>
option offered by B<ExtUtils::MakeMaker>.
B<Module::Install> users should consult L<Module::Install::AutoInstall>
for an alternative (and arguably more elegant) syntax to specify
features, as demonstrated by this module's own F<Makefile.PL>.
=head2 Prerequisites and Features
Prerequisites are grouped into B<features>, and the user could choose
yes/no on each one's dependencies; the module writer may also supply a
boolean value via C<-default> to specify the default choice.
The B<Core Features> marked by the name C<-core> will double-check with
the user, if the user chooses not to install the mandatory modules.
This differs from the pre-0.26 'silent install' behaviour.
Starting from version 0.27, if C<-core> is set to the string C<all>
(case-insensitive), every feature will be considered mandatory.
The dependencies are expressed as pairs of C<Module> => C<version>
inside an array reference. If the order does not matter, and there
are no C<-default>, C<-tests> or C<-skiptests> directives for that
feature, you may also use a hash reference.
=head2 The Installation Process
Once B<ExtUtils::AutoInstall> has determined which module(s) are needed,
it checks whether it's running under the B<CPAN> shell and should
therefore let B<CPAN> handle the dependency.
Finally, the C<WriteMakefile()> is overridden to perform some additional
checks, as well as skips tests associated with disabled features by the
C<-tests> option.
The actual installation happens at the end of the C<make config> target;
both C<make test> and C<make install> will trigger the installation of
required modules.
If it's not running under B<CPAN>, the installer will probe for an
active connection by trying to resolve the domain C<cpan.org>, and check
for the user's permission to use B<CPAN>. If all went well, a separate
B<CPAN> instance is created to install the required modules.
If you have the B<CPANPLUS> package installed in your system, it is
preferred by default over B<CPAN>; it also accepts some extra options
(e.g. C<-target =E<gt> 'skiptest', -skiptest =E<gt> 1> to skip testing).
All modules scheduled to be installed will be deleted from C<%INC>
first, so B<ExtUtils::MakeMaker> will check the newly installed modules.
Additionally, you could use the C<make installdeps> target to install
the modules, and the C<make checkdeps> target to check dependencies
without actually installing them; the C<perl Makefile.PL --checkdeps>
command has an equivalent effect.
If the F<Makefile.PL> itself needs to use an independent module (e.g.
B<Acme::KillarApp>, v1.21 or greater), then use something like below:
BEGIN {
require ExtUtils::AutoInstall;
# the first argument is an arrayref of the -config flags
ExtUtils::AutoInstall->install([], 'Acme::KillerApp' => 1.21);
}
use Acme::KillerApp 1.21;
ExtUtils::AutoInstall->import(
# ... arguments as usual ...
);
Note the version test in the use clause; if you are so close to the
cutting edge that B<Acme::KillerApp> 1.20 is the latest version on CPAN,
this will prevent your module from going awry.
=head2 User-Defined Hooks
Starting from version 0.40, user-defined I<pre-installation> and
I<post-installation> hooks are available via C<MY::preinstall> and
C<MY::postinstall> subroutines.
Note that since B<ExtUtils::AutoInstall> performs installation at the
time of C<use> (i.e. before perl parses the remainder of
F<Makefile.PL>), you have to declare those two handlers I<before> the
C<use> statement for them to take effect.
If the user did not choose to install a module or it already exists on
the system, neither of the handlers is invoked. Both handlers are invoked
exactly once for each module when installation is attempted.
C<MY::preinstall> takes two arguments, C<$module_name> and C<$version>;
if it returns a false value, installation for that module will be
skipped, and C<MY::postinstall> won't be called at all.
C<MY::postinstall> takes three arguments, C<$module_name>, C<$version>
and C<$success>. The last one denotes whether the installation
succeeded or not: C<1> means installation completed successfully, C<0>
means failure during install, and C<undef> means that the installation
was not attempted at all, possibly due to connection problems, or that
module does not exist on CPAN at all.
=head2 Customized C<MY::postamble>
Starting from version 0.43, B<ExtUtils::AutoInstall> supports modules
that require a C<MY::postamble> subroutine in their F<Makefile.PL>.
The user-defined C<MY::postamble>, if present, is responsible for
calling C<ExtUtils::AutoInstall::postamble> and include the output in
its return value.
For example, the B<DBD::*> (database driver) modules for the Perl DBI
are required to include the postamble generated by the function
C<dbd_postamble>, so their F<Makefile.PL> may contain lines like this:
sub MY::postamble {
return &ExtUtils::AutoInstall::postamble . &dbd_postamble;
}
Note that the B<ExtUtils::AutoInstall> module does not export the
C<postamble> function, so the name should always be fully qualified.
=head1 CAVEATS
B<ExtUtils::AutoInstall> will add C<UNINST=1> to your B<make install>
flags if your effective uid is 0 (root), unless you explicitly disable
it by setting B<CPAN>'s C<make_install_arg> configuration option (or the
C<makeflags> option of B<CPANPLUS>) to include C<UNINST=0>. This I<may>
cause dependency problems if you are using a fine-tuned directory
structure for your site. Please consult L<CPAN/FAQ> for an explanation
in detail.
If either B<version> or B<Sort::Versions> is available, they will be
used to compare the required version with the existing module's version
and the CPAN module's. Otherwise it silently falls back to use I<cmp>.
This may cause inconsistent behaviours in pathetic situations.
=head1 NOTES
Since this module is needed before writing F<Makefile>, it makes little
use as a CPAN module; hence each distribution must include it in full.
The only alternative I'm aware of, namely prompting in F<Makefile.PL> to
force user install it (cf. the B<Template Toolkit>'s dependency on
B<AppConfig>) is not very desirable either.
The current compromise is to add the bootstrap code listed in the
L</SYNOPSIS> before every script, but that does not look pretty, and
will not work without an Internet connection.
Since we do not want all future options of B<ExtUtils::AutoInstall> to
be painfully detected manually like above, this module provides a
I<bootstrapping> mechanism via the C<-version> flag. If a newer version
is needed by the F<Makefile.PL>, it will go ahead to fetch a new
version, reload it into memory, and pass the arguments forward.
If you have any suggestions, please let me know. Thanks.
=head1 ENVIRONMENT
B<ExtUtils::AutoInstall> uses a single environment variable,
C<PERL_EXTUTILS_AUTOINSTALL>. It is taken as the command line argument
passed to F<Makefile.PL>; you could set it to either C<--defaultdeps> or
C<--skipdeps> to avoid interactive behaviour.
=cut
# special map on pre-defined feature sets
my %FeatureMap = (
'' => 'Core Features', # XXX: deprecated
'-core' => 'Core Features',
);
# various lexical flags
my (@Missing, @Existing, %DisabledTests, $UnderCPAN, $HasCPANPLUS);
my ($Config, $CheckOnly, $SkipInstall, $AcceptDefault, $TestOnly);
my ($PostambleActions, $PostambleUsed);
$AcceptDefault = 1 unless -t STDIN; # non-interactive session
_init();
sub missing_modules {
return @Missing;
}
sub do_install {
__PACKAGE__->install(
[ UNIVERSAL::isa($Config, 'HASH') ? %{$Config} : @{$Config}],
@Missing,
);
}
# initialize various flags, and/or perform install
sub _init {
foreach my $arg (@ARGV, split(/[\s\t]+/, $ENV{PERL_EXTUTILS_AUTOINSTALL} || '')) {
if ($arg =~ /^--config=(.*)$/) {
$Config = [ split(',', $1) ];
}
elsif ($arg =~ /^--installdeps=(.*)$/) {
__PACKAGE__->install($Config, @Missing = split(/,/, $1));
exit 0;
}
elsif ($arg =~ /^--default(?:deps)?$/) {
$AcceptDefault = 1;
}
elsif ($arg =~ /^--check(?:deps)?$/) {
$CheckOnly = 1;
}
elsif ($arg =~ /^--skip(?:deps)?$/) {
$SkipInstall = 1;
}
elsif ($arg =~ /^--test(?:only)?$/) {
$TestOnly = 1;
}
}
}
# overrides MakeMaker's prompt() to automatically accept the default choice
sub _prompt {
goto &ExtUtils::MakeMaker::prompt unless $AcceptDefault;
my ($prompt, $default) = @_;
my $y = ($default =~ /^[Yy]/);
print $prompt, ' [', ($y ? 'Y' : 'y'), '/', ($y ? 'n' : 'N'), '] ';
print "$default\n";
return $default;
}
# the workhorse
sub import {
my $class = shift;
my @args = @_ or return;
my $core_all;
print "*** $class version ".$class->VERSION."\n";
print "*** Checking for dependencies...\n";
my $cwd = Cwd::cwd();
$Config = [];
my $maxlen = length((sort { length($b) <=> length($a) }
grep { /^[^\-]/ }
map { ref($_) ? keys %{ref($_) eq 'HASH' ? $_ : +{@{$_}}} : '' }
map { +{@args}->{$_} }
grep { /^[^\-]/ or /^-core$/i } keys %{+{@args}})[0]);
while (my ($feature, $modules) = splice(@args, 0, 2)) {
my (@required, @tests, @skiptests);
my $default = 1;
my $conflict = 0;
if ($feature =~ m/^-(\w+)$/) {
my $option = lc($1);
# check for a newer version of myself
_update_to($modules, @_) and return if $option eq 'version';
# sets CPAN configuration options
$Config = $modules if $option eq 'config';
# promote every features to core status
$core_all = ($modules =~ /^all$/i) and next
if $option eq 'core';
next unless $option eq 'core';
}
print "[".($FeatureMap{lc($feature)} || $feature)."]\n";
$modules = [ %{$modules} ] if UNIVERSAL::isa($modules, 'HASH');
unshift @$modules, -default => &{shift(@$modules)}
if (ref($modules->[0]) eq 'CODE'); # XXX: bugward combatability
while (my ($mod, $arg) = splice(@$modules, 0, 2)) {
if ($mod =~ m/^-(\w+)$/) {
my $option = lc($1);
$default = $arg if ($option eq 'default');
$conflict = $arg if ($option eq 'conflict');
@tests = @{$arg} if ($option eq 'tests');
@skiptests = @{$arg} if ($option eq 'skiptests');
next;
}
printf("- %-${maxlen}s ...", $mod);
# XXX: check for conflicts and uninstalls(!) them.
if (defined(my $cur = _version_check(_load($mod), $arg ||= 0))) {
print "loaded. ($cur".($arg ? " >= $arg" : '').")\n";
push @Existing, $mod => $arg;
$DisabledTests{$_} = 1 for map { glob($_) } @skiptests;
}
else {
print "failed!" . ($arg ? " (needs $arg)" : '') . "\n";
push @required, $mod => $arg;
}
}
next unless @required;
my $mandatory = (($feature eq '-core' or $core_all) and $default);
if (!$SkipInstall and ($CheckOnly or _prompt(
qq{==> Do you wish to install the }. (@required / 2).
($mandatory ? ' mandatory' : ' optional').
qq{ module(s)?}, $default ? 'y' : 'n',
) =~ /^[Yy]/)) {
push (@Missing, @required);
$DisabledTests{$_} = 1 for map { glob($_) } @skiptests;
}
elsif (!$SkipInstall and $mandatory and _prompt(
qq{==> The module(s) are mandatory! Really skip?}, 'n',
) =~ /^[Nn]/) {
push (@Missing, @required);
$DisabledTests{$_} = 1 for map { glob($_) } @skiptests;
}
else {
$DisabledTests{$_} = 1 for map { glob($_) } @tests;
}
}
_check_lock(); # check for $UnderCPAN
if (@Missing and not ($CheckOnly or $UnderCPAN)) {
require Config;
print "*** Dependencies will be installed the next time you type '$Config::Config{make}'.\n";
# make an educated guess of whether we'll need root permission.
print " (You may need to do that as the 'root' user.)\n" if eval '$>';
}
print "*** $class configuration finished.\n";
chdir $cwd;
# import to main::
no strict 'refs';
*{'main::WriteMakefile'} = \&Write if caller(0) eq 'main';
}
# CPAN.pm is non-reentrant, so check if we're under it and have no CPANPLUS
sub _check_lock {
return unless @Missing;
return if _has_cpanplus();
require CPAN; CPAN::Config->load;
my $lock = MM->catfile($CPAN::Config->{cpan_home}, ".lock");
if (-f $lock and open(LOCK, $lock)
and ($^O eq 'MSWin32' ? _under_cpan() : <LOCK> == getppid())
and ($CPAN::Config->{prerequisites_policy} || '') ne 'ignore'
) {
print << '.';
*** Since we're running under CPAN, I'll just let it take care
of the dependency's installation later.
.
$UnderCPAN = 1;
}
close LOCK;
}
sub install {
my $class = shift;
my $i; # used below to strip leading '-' from config keys
my @config = (map { s/^-// if ++$i; $_ } @{+shift});
my (@modules, @installed);
while (my ($pkg, $ver) = splice(@_, 0, 2)) {
# grep out those already installed
if (defined(_version_check(_load($pkg), $ver))) {
push @installed, $pkg;
}
else {
push @modules, $pkg, $ver;
}
}
return @installed unless @modules; # nothing to do
print "*** Installing dependencies...\n";
return unless _connected_to('cpan.org');
my %args = @config;
my %failed;
local *FAILED;
if ($args{do_once} and open(FAILED, '.#autoinstall.failed')) {
while (<FAILED>) { chomp; $failed{$_}++ }
close FAILED;
my @newmod;
while (my ($k, $v) = splice(@modules, 0, 2)) {
push @newmod, ($k => $v) unless $failed{$k};
}
@modules = @newmod;
}
if (_has_cpanplus()) {
_install_cpanplus(\@modules, \@config);
}
else {
_install_cpan(\@modules, \@config);
}
print "*** $class installation finished.\n";
# see if we have successfully installed them
while (my ($pkg, $ver) = splice(@modules, 0, 2)) {
if (defined(_version_check(_load($pkg), $ver))) {
push @installed, $pkg;
}
elsif ($args{do_once} and open(FAILED, '>> .#autoinstall.failed')) {
print FAILED "$pkg\n";
}
}
close FAILED if $args{do_once};
return @installed;
}
sub _install_cpanplus {
my @modules = @{+shift};
my @config = @{+shift};
my $installed = 0;
require CPANPLUS::Backend;
my $cp = CPANPLUS::Backend->new;
my $conf = $cp->configure_object;
return unless _can_write($conf->_get_build('base'));
# if we're root, set UNINST=1 to avoid trouble unless user asked for it.
my $makeflags = $conf->get_conf('makeflags') || '';
if (UNIVERSAL::isa($makeflags, 'HASH')) {
# 0.03+ uses a hashref here
$makeflags->{UNINST} = 1 unless exists $makeflags->{UNINST};
}
else {
# 0.02 and below uses a scalar
$makeflags = join(' ', split(' ', $makeflags), 'UNINST=1')
if ($makeflags !~ /\bUNINST\b/ and eval qq{ $> eq '0' });
}
$conf->set_conf(makeflags => $makeflags);
while (my ($key, $val) = splice(@config, 0, 2)) {
eval { $conf->set_conf($key, $val) };
}
my $modtree = $cp->module_tree;
while (my ($pkg, $ver) = splice(@modules, 0, 2)) {
print "*** Installing $pkg...\n";
MY::preinstall($pkg, $ver) or next if defined &MY::preinstall;
my $success;
my $obj = $modtree->{$pkg};
if ($obj and defined(_version_check($obj->{version}, $ver))) {
my $pathname = $pkg; $pathname =~ s/::/\\W/;
foreach my $inc (grep { m/$pathname.pm/i } keys(%INC)) {
delete $INC{$inc};
}
my $rv = $cp->install( modules => [ $obj->{module} ]);
if ($rv and ($rv->{$obj->{module}} or $rv->{ok})) {
print "*** $pkg successfully installed.\n";
$success = 1;
}
else {
print "*** $pkg installation cancelled.\n";
$success = 0;
}
$installed += $success;
}
else {
print << ".";
*** Could not find a version $ver or above for $pkg; skipping.
.
}
MY::postinstall($pkg, $ver, $success) if defined &MY::postinstall;
}
return $installed;
}
sub _install_cpan {
my @modules = @{+shift};
my @config = @{+shift};
my $installed = 0;
my %args;
require CPAN; CPAN::Config->load;
return unless _can_write(MM->catfile($CPAN::Config->{cpan_home}, 'sources'));
# if we're root, set UNINST=1 to avoid trouble unless user asked for it.
my $makeflags = $CPAN::Config->{make_install_arg} || '';
$CPAN::Config->{make_install_arg} = join(' ', split(' ', $makeflags), 'UNINST=1')
if ($makeflags !~ /\bUNINST\b/ and eval qq{ $> eq '0' });
# don't show start-up info
$CPAN::Config->{inhibit_startup_message} = 1;
# set additional options
while (my ($opt, $arg) = splice(@config, 0, 2)) {
($args{$opt} = $arg, next)
if $opt =~ /^force$/; # pseudo-option
$CPAN::Config->{$opt} = $arg;
}
while (my ($pkg, $ver) = splice(@modules, 0, 2)) {
MY::preinstall($pkg, $ver) or next if defined &MY::preinstall;
print "*** Installing $pkg...\n";
my $obj = CPAN::Shell->expand(Module => $pkg);
my $success = 0;
if ($obj and defined(_version_check($obj->cpan_version, $ver))) {
my $pathname = $pkg; $pathname =~ s/::/\\W/;
foreach my $inc (grep { m/$pathname.pm/i } keys(%INC)) {
delete $INC{$inc};
}
$obj->force('install') if $args{force};
if ($obj->install eq 'YES') {
print "*** $pkg successfully installed.\n";
$success = 1;
}
else {
print "*** $pkg installation failed.\n";
$success = 0;
}
$installed += $success;
}
else {
print << ".";
*** Could not find a version $ver or above for $pkg; skipping.
.
}
MY::postinstall($pkg, $ver, $success) if defined &MY::postinstall;
}
return $installed;
}
sub _has_cpanplus {
return (
$HasCPANPLUS = (
$INC{'CPANPLUS/Config.pm'} or
_load('CPANPLUS::Shell::Default')
)
);
}
# make guesses on whether we're under the CPAN installation directory
sub _under_cpan {
require Cwd;
require File::Spec;
my $cwd = File::Spec->canonpath(Cwd::cwd());
my $cpan = File::Spec->canonpath($CPAN::Config->{cpan_home});
return (index($cwd, $cpan) > -1);
}
sub _update_to {
my $class = __PACKAGE__;
my $ver = shift;
return if defined(_version_check(_load($class), $ver)); # no need to upgrade
if (_prompt(
"==> A newer version of $class ($ver) is required. Install?", 'y'
) =~ /^[Nn]/) {
die "*** Please install $class $ver manually.\n";
}
print << ".";
*** Trying to fetch it from CPAN...
.
# install ourselves
_load($class) and return $class->import(@_)
if $class->install([], $class, $ver);
print << '.'; exit 1;
*** Cannot bootstrap myself. :-( Installation terminated.
.
}
# check if we're connected to some host, using inet_aton
sub _connected_to {
my $site = shift;
return (
( _load('Socket') and Socket::inet_aton($site) ) or _prompt(qq(
*** Your host cannot resolve the domain name '$site', which
probably means the Internet connections are unavailable.
==> Should we try to install the required module(s) anyway?), 'n'
) =~ /^[Yy]/
);
}
# check if a directory is writable; may create it on demand
sub _can_write {
my $path = shift;
mkdir ($path, 0755) unless -e $path;
require Config;
return 1 if -w $path and -w $Config::Config{sitelib};
print << ".";
*** You are not allowed to write to the directory '$path';
the installation may fail due to insufficient permissions.
.
if (eval '$>' and lc(`sudo -V`) =~ /version/ and _prompt(qq(
==> Should we try to re-execute the autoinstall process with 'sudo'?), 'y'
) =~ /^[Yy]/) {
# try to bootstrap ourselves from sudo
print << ".";
*** Trying to re-execute the autoinstall process with 'sudo'...
.
my $missing = join(',', @Missing);
my $config = join(',',
UNIVERSAL::isa($Config, 'HASH') ? %{$Config} : @{$Config}
) if $Config;
return unless system('sudo', $^X, $0, "--config=$config", "--installdeps=$missing");
print << ".";
*** The 'sudo' command exited with error! Resuming...
.
}
return _prompt(qq(
==> Should we try to install the required module(s) anyway?), 'n'
) =~ /^[Yy]/
}
# load a module and return the version it reports
sub _load {
my $mod = pop; # class/instance doesn't matter
my $file = $mod;
$file =~ s|::|/|g;
$file .= '.pm';
local $@;
return eval { require $file; $mod->VERSION } || ($@ ? undef : 0);
}
# compare two versions, either use Sort::Versions or plain comparison
sub _version_check {
my ($cur, $min) = @_;
return unless defined $cur;
$cur =~ s/\s+$//;
# check for version numbers that are not in decimal format
if (ref($cur) or ref($min) or $cur =~ /v|\..*\./ or $min =~ /v|\..*\./) {
if ($version::VERSION or defined(_load('version'))) {
# use version.pm if it is installed.
return ((version->new($cur) >= version->new($min)) ? $cur : undef);
}
elsif ($Sort::Versions::VERSION or defined(_load('Sort::Versions'))) {
# use Sort::Versions as the sorting algorithm for a.b.c versions
return ((Sort::Versions::versioncmp($cur, $min) != -1) ? $cur : undef);
}
warn "Cannot reliably compare non-decimal formatted versions.\n".
"Please install version.pm or Sort::Versions.\n";
}
# plain comparison
local $^W = 0; # shuts off 'not numeric' bugs
return ($cur >= $min ? $cur : undef);
}
# nothing; this usage is deprecated.
sub main::PREREQ_PM { return {}; }
sub _make_args {
my %args = @_;
$args{PREREQ_PM} = { %{$args{PREREQ_PM} || {} }, @Existing, @Missing }
if $UnderCPAN or $TestOnly;
if ($args{EXE_FILES}) {
require ExtUtils::Manifest;
my $manifest = ExtUtils::Manifest::maniread('MANIFEST');
$args{EXE_FILES} = [
grep { exists $manifest->{$_} } @{$args{EXE_FILES}}
];
}
$args{test}{TESTS} ||= 't/*.t';
$args{test}{TESTS} = join(' ', grep {
!exists($DisabledTests{$_})
} map { glob($_) } split(/\s+/, $args{test}{TESTS}));
my $missing = join(',', @Missing);
my $config = join(',',
UNIVERSAL::isa($Config, 'HASH') ? %{$Config} : @{$Config}
) if $Config;
$PostambleActions = (
$missing ? "\$(PERL) $0 --config=$config --installdeps=$missing"
: "\@\$(NOOP)"
);
return %args;
}
# a wrapper to ExtUtils::MakeMaker::WriteMakefile
sub Write {
require Carp;
Carp::croak "WriteMakefile: Need even number of args" if @_ % 2;
if ($CheckOnly) {
print << ".";
*** Makefile not written in check-only mode.
.
return;
}
my %args = _make_args(@_);
no strict 'refs';
$PostambleUsed = 0;
local *MY::postamble = \&postamble unless defined &MY::postamble;
ExtUtils::MakeMaker::WriteMakefile(%args);
print << "." unless $PostambleUsed;
*** WARNING: Makefile written with customized MY::postamble() without
including contents from ExtUtils::AutoInstall::postamble() --
auto installation features disabled. Please contact the author.
.
return 1;
}
sub postamble {
$PostambleUsed = 1;
return << ".";
config :: installdeps
\t\@\$(NOOP)
checkdeps ::
\t\$(PERL) $0 --checkdeps
installdeps ::
\t$PostambleActions
.
}
1;
__END__
=head1 SEE ALSO
L<perlmodlib>, L<ExtUtils::MakeMaker>, L<Sort::Versions>, L<CPAN>,
L<CPANPLUS>, L<Module::Install>
=head1 ACKNOWLEDGEMENTS
The test script included in the B<ExtUtils::AutoInstall> distribution
contains code adapted from Michael Schwern's B<Test::More> under the
I<Perl License>. Please consult to F<t/AutoInstall.t> for details.
See the F<AUTHORS> file in this module's source distribution for the
list of contributors.
=head1 AUTHORS
Autrijus Tang E<lt>autrijus@autrijus.orgE<gt>
=head1 COPYRIGHT
Copyright 2001, 2002, 2003 by Autrijus Tang E<lt>autrijus@autrijus.orgE<gt>.
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
See L<http://www.perl.com/perl/misc/Artistic.html>
=cut