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#!/usr/bin/perl
#
# Check source files for SPDX-License-Identifier fields.
#
# Examine all source files in a distribution to check that they contain an
# SPDX-License-Identifier field. This does not check the syntax or whether
# the identifiers are valid.
#
# The canonical version of this file is maintained in the rra-c-util package,
# which can be found at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
#
# Copyright 2018-2019 Russ Allbery <eagle@eyrie.org>
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
#
# SPDX-License-Identifier: MIT
use 5.008;
use strict;
use warnings;
use lib 't/lib';
use Test::RRA qw(skip_unless_automated);
use File::Find qw(find);
use Test::More;
# File name (the file without any directory component) and path patterns to
# skip for this check.
## no critic (RegularExpressions::ProhibitFixedStringMatches)
my @IGNORE = (
qr{ \A Build ( [.] (?!PL) .* )? \z }ixms, # Generated file from Build.PL
qr{ \A LICENSE \z }xms, # Generated file, no license itself
qr{ \A (Changes|NEWS|THANKS) \z }xms, # Package license should be fine
qr{ \A TODO \z }xms, # Package license should be fine
qr{ \A MANIFEST ( [.] .* )? \z }xms, # Package license should be fine
qr{ \A Makefile \z }xms, # Generated file, no license itself
qr{ \A (MY)? META [.] .* }xms, # Generated file, no license itself
qr{ [.] output \z }xms, # Test data
qr{ pod2htm . [.] tmp \z }xms, # Windows pod2html output
);
my @IGNORE_PATHS = (
qr{ \A [.] / [.] git/ }xms, # Version control files
qr{ \A [.] /_build/ }xms, # Module::Build metadata
qr{ \A [.] /blib/ }xms, # Perl build system artifacts
qr{ \A [.] /cover_db/ }xms, # Artifacts from coverage testing
qr{ \A [.] /debian/ }xms, # Found in debian/* branches
qr{ \A [.] /docs/metadata/ }xms, # Package license should be fine
qr{ \A [.] /README ( [.] .* )? \z }xms, # Package license should be fine
qr{ \A [.] /share/ }xms, # Package license should be fine
qr{ \A [.] /t/data .* /metadata/ }xms, # Test metadata
qr{ \A [.] /t/data .* /output/ }xms, # Test output
qr{ \A [.] /t/data .* [.] json \z }xms, # Test metadata
);
## use critic
# Only run this test during automated testing, since failure doesn't indicate
# any user-noticable flaw in the package itself.
skip_unless_automated('SPDX identifier tests');
# Check a single file for an occurrence of the string.
#
# $path - Path to the file
#
# Returns: undef
sub check_file {
my $filename = $_;
my $path = $File::Find::name;
# Ignore files in the whitelist and binary files.
for my $pattern (@IGNORE) {
return if $filename =~ $pattern;
}
for my $pattern (@IGNORE_PATHS) {
if ($path =~ $pattern) {
$File::Find::prune = 1;
return;
}
}
return if -d $filename;
return if !-T $filename;
# Scan the file.
my ($saw_legacy_notice, $saw_spdx, $skip_spdx);
open(my $file, '<', $filename) or BAIL_OUT("Cannot open $path");
while (defined(my $line = <$file>)) {
if ($line =~ m{ \b See \s+ LICENSE \s+ for \s+ licensing }xms) {
$saw_legacy_notice = 1;
}
if ($line =~ m{ \b SPDX-License-Identifier: \s+ \S+ }xms) {
$saw_spdx = 1;
last;
}
if ($line =~ m{ no \s SPDX-License-Identifier \s registered }xms) {
$skip_spdx = 1;
last;
}
}
close($file) or BAIL_OUT("Cannot close $path");
# If there is a legacy license notice, report a failure regardless of file
# size. Otherwise, skip files under 1KB. They can be rolled up into the
# overall project license and the license notice may be a substantial
# portion of the file size.
if ($saw_legacy_notice) {
ok(!$saw_legacy_notice, "$path has legacy license notice");
} else {
ok($saw_spdx || $skip_spdx || -s $filename < 1024, $path);
}
return;
}
# Use File::Find to scan all files from the top of the directory.
find(\&check_file, q{.});
done_testing();
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