From 4ec9e1c470394e99e21ce669fb42d853c950dd94 Mon Sep 17 00:00:00 2001
From: "B. Watson" <urchlay@slackware.uk>
Date: Tue, 2 Apr 2024 13:19:47 -0400
Subject: sbofixinfo: fix non-canonical github archive/ URLs.

---
 sbofixinfo | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)

diff --git a/sbofixinfo b/sbofixinfo
index a1eff12..7b1e9ed 100755
--- a/sbofixinfo
+++ b/sbofixinfo
@@ -83,6 +83,28 @@ original and 'corrected' key names using your own eyeballs and brain.
 If there is no PRGNAM, it will be generated from the .info file's name
 (minus the I<.info> extension).
 
+=item -
+
+Github archive/ download URLs will be "canonized". This means URLs of these
+forms:
+
+  https://github.com/user/project/archive/v1.2.3.tar.gz
+  https://github.com/user/project/archive/refs/tags/v1.2.3.tar.gz
+  https://github.com/user/project/archive/1.2.3.tar.gz
+  https://github.com/user/project/archive/refs/tags/1.2.3.tar.gz
+
+...will be rewritten as:
+
+  https://github.com/user/project/archive/<tag>/project-1.2.3.tar.gz
+
+..where <tag> will be v1.2.3 or 1.2.3, depending on whether the "v" was in the
+original URL.
+
+The purpose of this is to give a stable download filename, which won't vary depending
+on whether a browser or wget/curl is used to download the file.
+
+See https://slackbuilds.org/GITHUB_URLs.txt for more information.
+
 =back
 
 B<sbofixinfo> doesn't attempt to detect any other errors or dubious
@@ -138,6 +160,24 @@ B<sbolint>(1), B<sbopkglint>(1), B<sbodl>(1), B<sbopkg>(8), B<sboinstall>(1)
 	EMAIL
 };
 
+sub fix_github_url {
+	my $url = shift;
+	return $url unless $url =~ m,/archive/,;
+
+	$url =~ s,refs/tags/,,;
+
+	(my $proto, undef, undef, $user, $proj, undef, $tag, $filename) = split /\//, $url;
+	return $url if defined $filename;
+
+	return $url unless $tag =~ s,\.tar\.gz$,,;
+	my $ver = $tag;
+	$ver =~ s,^v(\d),$1,;
+
+	$url = "https://github.com/$user/$proj/archive/$tag/$proj-$ver.tar.gz";
+	return $url;
+}
+
+## main()
 $arg0 = @ARGV ? $ARGV[0] : undef;
 for($arg0) {
 	defined || last;
@@ -303,6 +343,22 @@ sub fix_info {
 	}
 	close $fh;
 
+	# 20240331 bkw: fix github URLs, if needed.
+	for my $key (qw/DOWNLOAD DOWNLOAD_x86_64/) {
+		if($info{$key}) {
+			my @urls = split " ", $info{$key};
+			my @newurls;
+			for my $url (@urls) {
+				my $newurl = $url;
+				if($url =~ m,https://github.com/,) {
+					$newurl = fix_github_url($url);
+				}
+				push @newurls, $newurl;
+			}
+			$info{$key} = join " ", @newurls;
+		}
+	}
+
 	system("mv $file $file.bak");
 
 	open $fh, ">$file" or do {
-- 
cgit v1.2.3