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|
package Carton::Snapshot::Parser;
use Class::Tiny;
use warnings NONFATAL => 'all';
use Carton::Dist;
use Carton::Error;
my $machine = {
init => [
{
re => qr/^\# carton snapshot format: version (1\.0)/,
code => sub {
my($stash, $snapshot, $ver) = @_;
$snapshot->version($ver);
},
goto => 'section',
},
# TODO support pasing error and version mismatch etc.
],
section => [
{
re => qr/^DISTRIBUTIONS$/,
goto => 'dists',
},
{
re => qr/^__EOF__$/,
done => 1,
},
],
dists => [
{
re => qr/^ (\S+)$/,
code => sub { $_[0]->{dist} = Carton::Dist->new(name => $1) },
goto => 'distmeta',
},
{
re => qr/^\S/,
goto => 'section',
redo => 1,
},
],
distmeta => [
{
re => qr/^ pathname: (.*)$/,
code => sub { $_[0]->{dist}->pathname($1) },
},
{
re => qr/^\s{4}provides:$/,
code => sub { $_[0]->{property} = 'provides' },
goto => 'properties',
},
{
re => qr/^\s{4}requirements:$/,
code => sub {
$_[0]->{property} = 'requirements';
},
goto => 'properties',
},
{
re => qr/^\s{0,2}\S/,
code => sub {
my($stash, $snapshot) = @_;
$snapshot->add_distribution($stash->{dist});
%$stash = (); # clear
},
goto => 'dists',
redo => 1,
},
],
properties => [
{
re => qr/^\s{6}([0-9A-Za-z_:]+) ([v0-9\._,=\!<>\s]+|undef)/,
code => sub {
my($stash, $snapshot, $module, $version) = @_;
if ($stash->{property} eq 'provides') {
$stash->{dist}->provides->{$module} = { version => $version };
} else {
$stash->{dist}->add_string_requirement($module, $version);
}
},
},
{
re => qr/^\s{0,4}\S/,
goto => 'distmeta',
redo => 1,
},
],
};
sub parse {
my($self, $data, $snapshot) = @_;
my @lines = split /\r?\n/, $data;
my $state = $machine->{init};
my $stash = {};
LINE:
for my $line (@lines, '__EOF__') {
last LINE unless @$state;
STATE: {
for my $trans (@{$state}) {
if (my @match = $line =~ $trans->{re}) {
if (my $code = $trans->{code}) {
$code->($stash, $snapshot, @match);
}
if (my $goto = $trans->{goto}) {
$state = $machine->{$goto};
if ($trans->{redo}) {
redo STATE;
} else {
next LINE;
}
}
last STATE;
}
}
Carton::Error::SnapshotParseError->throw(error => "Could not parse snapshot file.");
}
}
}
1;
|
