nixpkgs/maintainers/scripts/generate-cpan-package
Eelco Dolstra 427b8cacf3 Add very hacky script to generate Perl packages
Given the name of Perl module, this script will download the package
containing the module from CPAN, determine its dependencies, and print
a Nix expression suitable for inclusion in perl-packages.nix on
stdout.

Example:

$ ./maintainers/scripts/generate-cpan-package DBIx::Class
  DBIxClass = buildPerlPackage {
    name = "DBIx-Class-0.08205";
    src = fetchurl {
      url = mirror://cpan/authors/id/F/FR/FREW/DBIx-Class-0.08205.tar.gz;
      sha256 = "16iyrfvwf4y94wxpwlla131grdf10z4xx9q9s6jsi39ycaxdaj6l";
    };
    buildInputs = [ DBDSQLite PackageStash TestException TestWarn ];
    propagatedBuildInputs = [ ClassAccessorGrouped ClassC3Componentised ClassInspector ConfigAny ContextPreserve DataCompare DataDumperConcise DataPage DBI DevelGlobalDestruction HashMerge ModuleFind Moo MROCompat namespaceclean PathClass ScopeGuard SQLAbstract SubName TryTiny ];
    meta = {
      homepage = http://www.dbix-class.org/;
      description = "Extensible and flexible object <-> relational mapper.";
      license = "perl";
    };
  };
2013-01-28 12:11:32 +01:00

123 lines
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Executable file

#! /bin/sh -e
export PERL5LIB=/nix/var/nix/profiles/per-user/eelco/cpan-generator/lib/perl5/site_perl
name="$1"
[ -n "$name" ] || { echo "no name"; exit 1; }
cpan -D "$name" > cpan-info
url="$(echo $(cat cpan-info | sed '6!d'))"
[ -n "$url" ] || { echo "no URL"; exit 1; }
url="mirror://cpan/authors/id/$url"
echo "URL = $url" >&2
version=$(cat cpan-info | grep 'CPAN: ' | awk '{ print $2 }')
echo "VERSION = $version"
declare -a xs=($(PRINT_PATH=1 nix-prefetch-url "$url"))
hash=${xs[0]}
path=${xs[1]}
echo "HASH = $hash" >&2
namedash="$(echo $name | sed s/::/-/g)-$version"
attr=$(echo $name | sed s/:://g)
rm -rf cpan_tmp
mkdir cpan_tmp
tar xf "$path" -C cpan_tmp
shopt -s nullglob
meta=$(echo cpan_tmp/*/META.json)
if [ -z "$meta" ]; then
yaml=$(echo cpan_tmp/*/META.yml)
[ -n "$yaml" ] || { echo "no meta file"; exit 1; }
meta=$(echo $yaml | sed s/\.yml$/.json/)
perl -e '
use YAML;
use JSON;
local $/;
$x = YAML::Load(<>);
print encode_json $x;
' < $yaml > $meta
fi
description="$(json abstract < $meta | perl -e '$x = <>; print uc(substr($x, 0, 1)), substr($x, 1);')"
homepage="$(json resources.homepage < $meta)"
if [ -z "$homepage" ]; then
#homepage="$(json meta-spec.url < $meta)"
true
fi
license="$(json license < $meta | json -a 2> /dev/null || true)"
if [ -z "$license" ]; then
license="$(json -a license < $meta)"
fi
license="$(echo $license | sed s/perl_5/perl5/)"
f() {
local type="$1"
perl -e '
use JSON;
local $/;
$x = decode_json <>;
if (defined $x->{prereqs}) {
$x2 = $x->{prereqs}->{'$type'}->{requires};
} elsif ("'$type'" eq "runtime") {
$x2 = $x->{requires};
} elsif ("'$type'" eq "configure") {
$x2 = $x->{configure_requires};
} elsif ("'$type'" eq "build") {
$x2 = $x->{build_requires};
}
foreach my $y (keys %{$x2}) {
next if $y eq "perl";
eval "use $y;";
if (!$@) {
print STDERR "skipping Perl-builtin module $y\n";
next;
}
print $y, "\n";
};
' < $meta | sed s/:://g
}
confdeps=$(f configure)
builddeps=$(f build)
testdeps=$(f test)
runtimedeps=$(f runtime)
buildInputs=$(echo $(for i in $confdeps $builddeps $testdeps; do echo $i; done | sort | uniq))
propagatedBuildInputs=$(echo $(for i in $runtimedeps; do echo $i; done | sort | uniq))
echo "===" >&2
cat <<EOF
$attr = buildPerlPackage {
name = "$namedash";
src = fetchurl {
url = $url;
sha256 = "$hash";
};
EOF
if [ -n "$buildInputs" ]; then
cat <<EOF
buildInputs = [ $buildInputs ];
EOF
fi
if [ -n "$propagatedBuildInputs" ]; then
cat <<EOF
propagatedBuildInputs = [ $propagatedBuildInputs ];
EOF
fi
cat <<EOF
meta = {
homepage = $homepage;
description = "$description";
license = "$license";
};
};
EOF