nixpkgs/maintainers/scripts/nixpkgs-lint.pl
Matthew Bauer fb924af13f nixpkgs-lint.pl: use nix-shell for shebang
This is more portable.
2018-06-16 20:14:51 -04:00

174 lines
5.2 KiB
Perl
Executable file
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

#! /usr/bin/env nix-shell
#! nix-shell -i perl -p perl perlPackages.XMLSimple
use strict;
use List::Util qw(min);
use XML::Simple qw(:strict);
use Getopt::Long qw(:config gnu_getopt);
# Parse the command line.
my $path = "<nixpkgs>";
my $filter = "*";
my $maintainer;
sub showHelp {
print <<EOF;
Usage: $0 [--package=NAME] [--maintainer=REGEXP] [--file=PATH]
Check Nixpkgs for common errors/problems.
-p, --package filter packages by name (default is *)
-m, --maintainer filter packages by maintainer (case-insensitive regexp)
-f, --file path to Nixpkgs (default is <nixpkgs>)
Examples:
\$ nixpkgs-lint -f /my/nixpkgs -p firefox
\$ nixpkgs-lint -f /my/nixpkgs -m eelco
EOF
exit 0;
}
GetOptions("package|p=s" => \$filter,
"maintainer|m=s" => \$maintainer,
"file|f=s" => \$path,
"help" => sub { showHelp() }
) or exit 1;
# Evaluate Nixpkgs into an XML representation.
my $xml = `nix-env -f '$path' -qa '$filter' --xml --meta --drv-path`;
die "$0: evaluation of $path failed\n" if $? != 0;
my $info = XMLin($xml, KeyAttr => { 'item' => '+attrPath', 'meta' => 'name' }, ForceArray => 1, SuppressEmpty => '' ) or die "cannot parse XML output";
# Check meta information.
print "=== Package meta information ===\n\n";
my $nrBadNames = 0;
my $nrMissingMaintainers = 0;
my $nrMissingPlatforms = 0;
my $nrMissingDescriptions = 0;
my $nrBadDescriptions = 0;
my $nrMissingLicenses = 0;
foreach my $attr (sort keys %{$info->{item}}) {
my $pkg = $info->{item}->{$attr};
my $pkgName = $pkg->{name};
my $pkgVersion = "";
if ($pkgName =~ /(.*)(-[0-9].*)$/) {
$pkgName = $1;
$pkgVersion = $2;
}
# Check the maintainers.
my @maintainers;
my $x = $pkg->{meta}->{maintainers};
if (defined $x && $x->{type} eq "strings") {
@maintainers = map { $_->{value} } @{$x->{string}};
} elsif (defined $x->{value}) {
@maintainers = ($x->{value});
}
if (defined $maintainer && scalar(grep { $_ =~ /$maintainer/i } @maintainers) == 0) {
delete $info->{item}->{$attr};
next;
}
if (scalar @maintainers == 0) {
print "$attr: Lacks a maintainer\n";
$nrMissingMaintainers++;
}
# Check the platforms.
if (!defined $pkg->{meta}->{platforms}) {
print "$attr: Lacks a platform\n";
$nrMissingPlatforms++;
}
# Package names should not be capitalised.
if ($pkgName =~ /^[A-Z]/) {
print "$attr: package name $pkgName should not be capitalised\n";
$nrBadNames++;
}
if ($pkgVersion eq "") {
print "$attr: package has no version\n";
$nrBadNames++;
}
# Check the license.
if (!defined $pkg->{meta}->{license}) {
print "$attr: Lacks a license\n";
$nrMissingLicenses++;
}
# Check the description.
my $description = $pkg->{meta}->{description}->{value};
if (!$description) {
print "$attr: Lacks a description\n";
$nrMissingDescriptions++;
} else {
my $bad = 0;
if ($description =~ /^\s/) {
print "$attr: Description starts with whitespace\n";
$bad = 1;
}
if ($description =~ /\s$/) {
print "$attr: Description ends with whitespace\n";
$bad = 1;
}
if ($description =~ /\.$/) {
print "$attr: Description ends with a period\n";
$bad = 1;
}
if (index(lc($description), lc($attr)) != -1) {
print "$attr: Description contains package name\n";
$bad = 1;
}
$nrBadDescriptions++ if $bad;
}
}
print "\n";
# Find packages that have the same name.
print "=== Package name collisions ===\n\n";
my %pkgsByName;
foreach my $attr (sort keys %{$info->{item}}) {
my $pkg = $info->{item}->{$attr};
#print STDERR "attr = $attr, name = $pkg->{name}\n";
$pkgsByName{$pkg->{name}} //= [];
push @{$pkgsByName{$pkg->{name}}}, $pkg;
}
my $nrCollisions = 0;
foreach my $name (sort keys %pkgsByName) {
my @pkgs = @{$pkgsByName{$name}};
# Filter attributes that are aliases of each other (e.g. yield the
# same derivation path).
my %drvsSeen;
@pkgs = grep { my $x = $drvsSeen{$_->{drvPath}}; $drvsSeen{$_->{drvPath}} = 1; !defined $x } @pkgs;
# Filter packages that have a lower priority.
my $highest = min (map { $_->{meta}->{priority}->{value} // 0 } @pkgs);
@pkgs = grep { ($_->{meta}->{priority}->{value} // 0) == $highest } @pkgs;
next if scalar @pkgs == 1;
$nrCollisions++;
print "The following attributes evaluate to a package named $name:\n";
print " ", join(", ", map { $_->{attrPath} } @pkgs), "\n\n";
}
print "=== Bottom line ===\n";
print "Number of packages: ", scalar(keys %{$info->{item}}), "\n";
print "Number of bad names: $nrBadNames\n";
print "Number of missing maintainers: $nrMissingMaintainers\n";
print "Number of missing platforms: $nrMissingPlatforms\n";
print "Number of missing licenses: $nrMissingLicenses\n";
print "Number of missing descriptions: $nrMissingDescriptions\n";
print "Number of bad descriptions: $nrBadDescriptions\n";
print "Number of name collisions: $nrCollisions\n";