427b8cacf3
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";
};
};
123 lines
2.8 KiB
Bash
Executable file
123 lines
2.8 KiB
Bash
Executable file
#! /bin/sh -e
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export PERL5LIB=/nix/var/nix/profiles/per-user/eelco/cpan-generator/lib/perl5/site_perl
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name="$1"
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[ -n "$name" ] || { echo "no name"; exit 1; }
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cpan -D "$name" > cpan-info
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url="$(echo $(cat cpan-info | sed '6!d'))"
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[ -n "$url" ] || { echo "no URL"; exit 1; }
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url="mirror://cpan/authors/id/$url"
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echo "URL = $url" >&2
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version=$(cat cpan-info | grep 'CPAN: ' | awk '{ print $2 }')
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echo "VERSION = $version"
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declare -a xs=($(PRINT_PATH=1 nix-prefetch-url "$url"))
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hash=${xs[0]}
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path=${xs[1]}
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echo "HASH = $hash" >&2
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namedash="$(echo $name | sed s/::/-/g)-$version"
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attr=$(echo $name | sed s/:://g)
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rm -rf cpan_tmp
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mkdir cpan_tmp
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tar xf "$path" -C cpan_tmp
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shopt -s nullglob
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meta=$(echo cpan_tmp/*/META.json)
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if [ -z "$meta" ]; then
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yaml=$(echo cpan_tmp/*/META.yml)
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[ -n "$yaml" ] || { echo "no meta file"; exit 1; }
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meta=$(echo $yaml | sed s/\.yml$/.json/)
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perl -e '
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use YAML;
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use JSON;
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local $/;
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$x = YAML::Load(<>);
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print encode_json $x;
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' < $yaml > $meta
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fi
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description="$(json abstract < $meta | perl -e '$x = <>; print uc(substr($x, 0, 1)), substr($x, 1);')"
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homepage="$(json resources.homepage < $meta)"
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if [ -z "$homepage" ]; then
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#homepage="$(json meta-spec.url < $meta)"
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true
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fi
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license="$(json license < $meta | json -a 2> /dev/null || true)"
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if [ -z "$license" ]; then
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license="$(json -a license < $meta)"
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fi
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license="$(echo $license | sed s/perl_5/perl5/)"
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f() {
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local type="$1"
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perl -e '
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use JSON;
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local $/;
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$x = decode_json <>;
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if (defined $x->{prereqs}) {
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$x2 = $x->{prereqs}->{'$type'}->{requires};
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} elsif ("'$type'" eq "runtime") {
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$x2 = $x->{requires};
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} elsif ("'$type'" eq "configure") {
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$x2 = $x->{configure_requires};
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} elsif ("'$type'" eq "build") {
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$x2 = $x->{build_requires};
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}
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foreach my $y (keys %{$x2}) {
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next if $y eq "perl";
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eval "use $y;";
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if (!$@) {
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print STDERR "skipping Perl-builtin module $y\n";
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next;
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}
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print $y, "\n";
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};
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' < $meta | sed s/:://g
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}
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confdeps=$(f configure)
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builddeps=$(f build)
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testdeps=$(f test)
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runtimedeps=$(f runtime)
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buildInputs=$(echo $(for i in $confdeps $builddeps $testdeps; do echo $i; done | sort | uniq))
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propagatedBuildInputs=$(echo $(for i in $runtimedeps; do echo $i; done | sort | uniq))
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echo "===" >&2
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cat <<EOF
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$attr = buildPerlPackage {
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name = "$namedash";
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src = fetchurl {
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url = $url;
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sha256 = "$hash";
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};
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EOF
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if [ -n "$buildInputs" ]; then
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cat <<EOF
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buildInputs = [ $buildInputs ];
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EOF
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fi
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if [ -n "$propagatedBuildInputs" ]; then
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cat <<EOF
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propagatedBuildInputs = [ $propagatedBuildInputs ];
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EOF
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fi
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cat <<EOF
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meta = {
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homepage = $homepage;
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description = "$description";
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license = "$license";
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};
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};
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EOF
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