package Module::AutoInstall;
use strict;
use Cwd ();
use File::Spec ();
use ExtUtils::MakeMaker ();
use vars qw{$VERSION};
BEGIN {
$VERSION = '1.06';
}
# special map on pre-defined feature sets
my %FeatureMap = (
'' => 'Core Features', # XXX: deprecated
'-core' => 'Core Features',
);
# various lexical flags
my ( @Missing, @Existing, %DisabledTests, $UnderCPAN, $InstallDepsTarget, $HasCPANPLUS );
my (
$Config, $CheckOnly, $SkipInstall, $AcceptDefault, $TestOnly, $AllDeps,
$UpgradeDeps
);
my ( $PostambleActions, $PostambleActionsNoTest, $PostambleActionsUpgradeDeps,
$PostambleActionsUpgradeDepsNoTest, $PostambleActionsListDeps,
$PostambleActionsListAllDeps, $PostambleUsed, $NoTest);
# See if it's a testing or non-interactive session
_accept_default( $ENV{AUTOMATED_TESTING} or ! -t STDIN );
_init();
sub _accept_default {
$AcceptDefault = shift;
}
sub _installdeps_target {
$InstallDepsTarget = shift;
}
sub missing_modules {
return @Missing;
}
sub do_install {
__PACKAGE__->install(
[
$Config
? ( 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_AUTOINSTALL} || $ENV{PERL_EXTUTILS_AUTOINSTALL} || ''
)
)
{
if ( $arg =~ /^--config=(.*)$/ ) {
$Config = [ split( ',', $1 ) ];
}
elsif ( $arg =~ /^--installdeps=(.*)$/ ) {
__PACKAGE__->install( $Config, @Missing = split( /,/, $1 ) );
exit 0;
}
elsif ( $arg =~ /^--upgradedeps=(.*)$/ ) {
$UpgradeDeps = 1;
__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;
}
elsif ( $arg =~ /^--all(?:deps)?$/ ) {
$AllDeps = 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 Perl dependencies...\n";
my $cwd = Cwd::cwd();
$Config = [];
my $maxlen = length(
(
sort { length($b) <=> length($a) }
grep { /^[^\-]/ }
map {
ref($_)
? ( ( ref($_) eq 'HASH' ) ? keys(%$_) : @{$_} )
: ''
}
map { +{@args}->{$_} }
grep { /^[^\-]/ or /^-core$/i } keys %{ +{@args} }
)[0]
);
# We want to know if we're under CPAN early to avoid prompting, but
# if we aren't going to try and install anything anyway then skip the
# check entirely since we don't want to have to load (and configure)
# an old CPAN just for a cosmetic message
$UnderCPAN = _check_lock(1) unless $SkipInstall || $InstallDepsTarget;
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 );
if ( $arg and $arg =~ /^\D/ ) {
unshift @$modules, $arg;
$arg = 0;
}
# XXX: check for conflicts and uninstalls(!) them.
my $cur = _version_of($mod);
if (_version_cmp ($cur, $arg) >= 0)
{
print "loaded. ($cur" . ( $arg ? " >= $arg" : '' ) . ")\n";
push @Existing, $mod => $arg;
$DisabledTests{$_} = 1 for map { glob($_) } @skiptests;
}
else {
if (not defined $cur) # indeed missing
{
print "missing." . ( $arg ? " (would need $arg)" : '' ) . "\n";
}
else
{
# no need to check $arg as _version_cmp ($cur, undef) would satisfy >= above
print "too old. ($cur < $arg)\n";
}
push @required, $mod => $arg;
}
}
next unless @required;
my $mandatory = ( $feature eq '-core' or $core_all );
if (
!$SkipInstall
and (
$CheckOnly
or ($mandatory and $UnderCPAN)
or $AllDeps
or $InstallDepsTarget
or _prompt(
qq{==> Auto-install the }
. ( @required / 2 )
. ( $mandatory ? ' mandatory' : ' optional' )
. qq{ module(s) from CPAN?},
$default ? 'y' : 'n',
) =~ /^[Yy]/
)
)
{
push( @Missing, @required );
$DisabledTests{$_} = 1 for map { glob($_) } @skiptests;
}
elsif ( !$SkipInstall
and $default
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;
}
}
if ( @Missing and not( $CheckOnly or $UnderCPAN) ) {
require Config;
my $make = $Config::Config{make};
if ($InstallDepsTarget) {
print
"*** To install dependencies type '$make installdeps' or '$make installdeps_notest'.\n";
}
else {
print
"*** Dependencies will be installed the next time you type '$make'.\n";
}
# make an educated guess of whether we'll need root permission.
print " (You may need to do that as the 'root' user.)\n"
if eval '$>';
}
print "*** $class configuration finished.\n";
chdir $cwd;
# import to main::
no strict 'refs';
*{'main::WriteMakefile'} = \&Write if caller(0) eq 'main';
return (@Existing, @Missing);
}
sub _running_under {
my $thing = shift;
print <<"END_MESSAGE";
*** Since we're running under ${thing}, I'll just let it take care
of the dependency's installation later.
END_MESSAGE
return 1;
}
# Check to see if we are currently running under CPAN.pm and/or CPANPLUS;
# if we are, then we simply let it taking care of our dependencies
sub _check_lock {
return unless @Missing or @_;
if ($ENV{PERL5_CPANM_IS_RUNNING}) {
return _running_under('cpanminus');
}
my $cpan_env = $ENV{PERL5_CPAN_IS_RUNNING};
if ($ENV{PERL5_CPANPLUS_IS_RUNNING}) {
return _running_under($cpan_env ? 'CPAN' : 'CPANPLUS');
}
require CPAN;
if ($CPAN::VERSION > '1.89') {
if ($cpan_env) {
return _running_under('CPAN');
}
return; # CPAN.pm new enough, don't need to check further
}
# last ditch attempt, this -will- configure CPAN, very sorry
_load_cpan(1); # force initialize even though it's already loaded
# Find the CPAN lock-file
my $lock = MM->catfile( $CPAN::Config->{cpan_home}, ".lock" );
return unless -f $lock;
# Check the lock
local *LOCK;
return unless open(LOCK, $lock);
if (
( $^O eq 'MSWin32' ? _under_cpan() : <LOCK> == getppid() )
and ( $CPAN::Config->{prerequisites_policy} || '' ) ne 'ignore'
) {
print <<'END_MESSAGE';
*** Since we're running under CPAN, I'll just let it take care
of the dependency's installation later.
END_MESSAGE
return 1;
}
close LOCK;
return;
}
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, $ver ) = splice( @_, 0, 2 ) ) {
# grep out those already installed
if ( _version_cmp( _version_of($pkg), $ver ) >= 0 ) {
push @installed, $pkg;
}
else {
push @modules, $pkg, $ver;
}
}
if ($UpgradeDeps) {
push @modules, @installed;
@installed = ();
}
return @installed unless @modules; # nothing to do
return @installed if _check_lock(); # defer to the CPAN shell
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() and not $ENV{PERL_AUTOINSTALL_PREFER_CPAN} ) {
_install_cpanplus( \@modules, \@config );
} else {
_install_cpan( \@modules, \@config );
}
print "*** $class installation finished.\n";
# see if we have successfully installed them
while ( my ( $pkg, $ver ) = splice( @modules, 0, 2 ) ) {
if ( _version_cmp( _version_of($pkg), $ver ) >= 0 ) {
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 = _cpanplus_config( @{ +shift } );
my $installed = 0;
require CPANPLUS::Backend;
my $cp = CPANPLUS::Backend->new;
my $conf = $cp->configure_object;
return unless $conf->can('conf') # 0.05x+ with "sudo" support
or _can_write($conf->_get_build('base')); # 0.04x
# 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 );
$conf->set_conf( prereqs => 1 );
while ( my ( $key, $val ) = splice( @config, 0, 2 ) ) {
$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 _version_cmp( $obj->{version}, $ver ) >= 0 ) {
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 $installed;
}
sub _cpanplus_config {
my @config = ();
while ( @_ ) {
my ($key, $value) = (shift(), shift());
if ( $key eq 'prerequisites_policy' ) {
if ( $value eq 'follow' ) {
$value = CPANPLUS::Internals::Constants::PREREQ_INSTALL();
} elsif ( $value eq 'ask' ) {
$value = CPANPLUS::Internals::Constants::PREREQ_ASK();
} elsif ( $value eq 'ignore' ) {
$value = CPANPLUS::Internals::Constants::PREREQ_IGNORE();
} else {
die "*** Cannot convert option $key = '$value' to CPANPLUS version.\n";
}
push @config, 'prereqs', $value;
} elsif ( $key eq 'force' ) {
push @config, $key, $value;
} elsif ( $key eq 'notest' ) {
push @config, 'skiptest', $value;
} else {
die "*** Cannot convert option $key to CPANPLUS version.\n";
}
}
return @config;
}
sub _install_cpan {
my @modules = @{ +shift };
my @config = @{ +shift };
my $installed = 0;
my %args;
_load_cpan();
require Config;
if (CPAN->VERSION < 1.80) {
# no "sudo" support, probe for writableness
return unless _can_write( MM->catfile( $CPAN::Config->{cpan_home}, 'sources' ) )
and _can_write( $Config::Config{sitelib} );
}
# 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 $opt =~ /^(?:force|notest)$/; # pseudo-option
$CPAN::Config->{$opt} = $arg;
}
if ($args{notest} && (not CPAN::Shell->can('notest'))) {
die "Your version of CPAN is too old to support the 'notest' pragma";
}
local $CPAN::Config->{prerequisites_policy} = 'follow';
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 _version_cmp( $obj->cpan_version, $ver ) >= 0 ) {
my $pathname = $pkg;
$pathname =~ s/::/\\W/;
foreach my $inc ( grep { m/$pathname.pm/i } keys(%INC) ) {
delete $INC{$inc};
}
my $rv = do {
if ($args{force}) {
CPAN::Shell->force( install => $pkg )
} elsif ($args{notest}) {
CPAN::Shell->notest( install => $pkg )
} else {
CPAN::Shell->install($pkg)
}
};
$rv ||= eval {
$CPAN::META->instance( 'CPAN::Distribution', $obj->cpan_file, )
->{install}
if $CPAN::META;
};
if ( $rv 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 $ver = shift;
return
if _version_cmp( _version_of($class), $ver ) >= 0; # 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;
return 1 if -w $path;
print << ".";
*** You are not allowed to write to the directory '$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'?),
((-t STDIN) ? 'y' : 'n')
) =~ /^[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; # method/function doesn't matter
my $file = $mod;
$file =~ s|::|/|g;
$file .= '.pm';
local $@;
return eval { require $file; $mod->VERSION } || ( $@ ? undef: 0 );
}
# report version without loading a module
sub _version_of {
my $mod = pop; # method/function doesn't matter
my $file = $mod;
$file =~ s|::|/|g;
$file .= '.pm';
foreach my $dir ( @INC ) {
next if ref $dir;
my $path = File::Spec->catfile($dir, $file);
next unless -e $path;
require ExtUtils::MM_Unix;
return ExtUtils::MM_Unix->parse_version($path);
}
return undef;
}
# Load CPAN.pm and it's configuration
sub _load_cpan {
return if $CPAN::VERSION and $CPAN::Config and not @_;
require CPAN;
# CPAN-1.82+ adds CPAN::Config::AUTOLOAD to redirect to
# CPAN::HandleConfig->load. CPAN reports that the redirection
# is deprecated in a warning printed at the user.
# CPAN-1.81 expects CPAN::HandleConfig->load, does not have
# $CPAN::HandleConfig::VERSION but cannot handle
# CPAN::Config->load
# Which "versions expect CPAN::Config->load?
if ( $CPAN::HandleConfig::VERSION
|| CPAN::HandleConfig->can('load')
) {
# Newer versions of CPAN have a HandleConfig module
CPAN::HandleConfig->load;
} else {
# Older versions had the load method in Config directly
CPAN::Config->load;
}
}
# compare two versions, either use Sort::Versions or plain comparison
# return values same as <=>
sub _version_cmp {
my ( $cur, $min ) = @_;
return -1 unless defined $cur; # if 0 keep comparing
return 1 unless $min;
$cur =~ s/\s+$//;
# check for version numbers that are not in decimal format
if ( ref($cur) or ref($min) or $cur =~ /v|\..*\./ or $min =~ /v|\..*\./ ) {
if ( ( $version::VERSION or defined( _load('version') )) and
version->can('new')
) {
# use version.pm if it is installed.
return version->new($cur) <=> version->new($min);
}
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 );
}
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;
}
# 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} and -e 'MANIFEST' ) {
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 and not $UnderCPAN)
? "\$(PERL) $0 --config=$config --installdeps=$missing"
: "\$(NOECHO) \$(NOOP)"
);
my $deps_list = join( ',', @Missing, @Existing );
$PostambleActionsUpgradeDeps =
"\$(PERL) $0 --config=$config --upgradedeps=$deps_list";
my $config_notest =
join( ',', (UNIVERSAL::isa( $Config, 'HASH' ) ? %{$Config} : @{$Config}),
'notest', 1 )
if $Config;
$PostambleActionsNoTest = (
($missing and not $UnderCPAN)
? "\$(PERL) $0 --config=$config_notest --installdeps=$missing"
: "\$(NOECHO) \$(NOOP)"
);
$PostambleActionsUpgradeDepsNoTest =
"\$(PERL) $0 --config=$config_notest --upgradedeps=$deps_list";
$PostambleActionsListDeps =
'@$(PERL) -le "print for @ARGV" '
. join(' ', map $Missing[$_], grep $_ % 2 == 0, 0..$#Missing);
my @all = (@Missing, @Existing);
$PostambleActionsListAllDeps =
'@$(PERL) -le "print for @ARGV" '
. join(' ', map $all[$_], grep $_ % 2 == 0, 0..$#all);
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 Module::AutoInstall::postamble() --
auto installation features disabled. Please contact the author.
.
return 1;
}
sub postamble {
$PostambleUsed = 1;
my $fragment;
$fragment .= <<"AUTO_INSTALL" if !$InstallDepsTarget;
config :: installdeps
\t\$(NOECHO) \$(NOOP)
AUTO_INSTALL
$fragment .= <<"END_MAKE";
checkdeps ::
\t\$(PERL) $0 --checkdeps
installdeps ::
\t$PostambleActions
installdeps_notest ::
\t$PostambleActionsNoTest
upgradedeps ::
\t$PostambleActionsUpgradeDeps
upgradedeps_notest ::
\t$PostambleActionsUpgradeDepsNoTest
listdeps ::
\t$PostambleActionsListDeps
listalldeps ::
\t$PostambleActionsListAllDeps
END_MAKE
return $fragment;
}
1;
__END__
=pod
=head1 NAME
Module::AutoInstall - Automatic install of dependencies via CPAN
=head1 SYNOPSIS
In F<Makefile.PL>, with L<Module::Install> available on the author's system:
use inc::Module::Install;
name 'Joe-Hacker';
abstract 'Perl Interface to Joe Hacker';
author 'Joe Hacker <joe@hacker.org>';
include 'Module::AutoInstall';
requires 'Module0'; # mandatory modules
feature 'Feature1',
-default => 0,
'Module2' => '0.1';
feature 'Feature2',
-default => 0,
'Module3' => '1.0';
auto_install(
make_args => '--hello', # option(s) for CPAN::Config
force => 1, # pseudo-option to force install
do_once => 1, # skip previously failed modules
);
WriteAll;
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 C<--defaultdeps> will make F<Makefile.PL> behave similarly to a regular
Makefile.PL file with C<PREREQ_PM> dependencies.
One can use environment variables (see "ENVIRONMENT") below to set a default
behavior instead of specifying it in the command line for every invocation
of F<Makefile.PL>.
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
% make installdeps_notest # same without running tests
% make upgradedeps # upgrade all deps, even if installed
% make upgradedeps_notest # same without running tests
% make listdeps # print unsatisifed deps, one per line
% make listalldeps # print all deps, one per line
=head1 DESCRIPTION
B<Module::AutoInstall> lets module writers to specify a more
sophisticated form of dependency information than the C<PREREQ_PM>
option offered by B<ExtUtils::MakeMaker>.
This module works best with the B<Module::Install> framework,
a drop-in replacement for MakeMaker. However, this module also
supports F<Makefile.PL> files based on MakeMaker; see L</EXAMPLES>
for instructions.
Specifying C<installdeps_target;> instead of C<auto_install;> will not try to
install dependencies when running C<make>, but only when running C<make
installdeps>.
=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<Module::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 Module::AutoInstall;
# the first argument is an arrayref of the -config flags
Module::AutoInstall->install([], 'Acme::KillerApp' => 1.21);
}
use Acme::KillerApp 1.21;
Module::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
User-defined I<pre-installation> and I<post-installation> hooks are
available via C<MY::preinstall> and C<MY::postinstall> subroutines,
as shown below:
# pre-install handler; takes $module_name and $version
sub MY::preinstall { return 1; } # return false to skip install
# post-install handler; takes $module_name, $version, $success
sub MY::postinstall { return; } # the return value doesn't matter
Note that since B<Module::AutoInstall> performs installation at the
time of C<use> (i.e. before perl parses the remainder of
F<Makefile.PL>), you have to declare those two handlers I<before> the
C<use> statement for them to take effect.
If the user did not choose to install a module or it already exists on
the system, neither of the handlers is invoked. Both handlers are invoked
exactly once for each module when installation is attempted.
C<MY::preinstall> takes two arguments, C<$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<Module::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<Module::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 &Module::AutoInstall::postamble . &dbd_postamble;
}
Note that the B<Module::AutoInstall> module does not export the
C<postamble> function, so the name should always be fully qualified.
=head1 CAVEATS
B<Module::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 ENVIRONMENT
B<Module::AutoInstall> uses a single environment variable,
C<PERL_AUTOINSTALL>. It is taken as the command line argument
passed to F<Makefile.PL>; you could set it to C<--alldeps>, C<--defaultdeps>
or C<--skipdeps> to avoid all interactive behaviour.
C<--alldeps> will install all features, while
C<--defaultdeps> will only install features for which the default answer is
'y'.
C<--skipdeps> will refrain from loading L<CPAN> and not install anything, unless
you're running under L<CPAN> or L<CPANPLUS>, in which case required dependencies
will be installed.
It is also read from the C<PERL_EXTUTILS_AUTOINSTALL> environment variable if
C<PERL_AUTOINSTALL> is not defined.
You can also set C<PERL_AUTOINSTALL_PREFER_CPAN> to use CPAN to install
dependencies. By default CPANPLUS is used.
=head1 SEE ALSO
L<Module::Install>
L<perlmodlib>, L<ExtUtils::MakeMaker>, L<Sort::Versions>, L<CPAN>,
L<CPANPLUS>
=head1 AUTHORS
Audrey Tang E<lt>autrijus@autrijus.orgE<gt>
Adam Kennedy E<lt>adamk@cpan.orgE<gt>
Matt S Trout E<lt>mst@shadowcat.co.uE<gt>
=head1 IF THIS BREAKS
Report a ticket to bugs-Module-Install <at> rt.cpan.org and cc Matt
- I appear to have volunteered as primary maintainer for this stuff so
if you run into any problems please tell me
=head1 COPYRIGHT
Copyright 2001, 2002, 2003, 2004, 2005, 2006 by Audrey Tang
Some parts copyright 2006 Adam Kennedy
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