From 226596177c63c3dc180b5aeda45fe3b18706e877 Mon Sep 17 00:00:00 2001
From: Maxwell G <gotmax@e.email>
Date: Aug 26 2022 21:34:54 +0000
Subject: Add RPM generator for bundled Provides


Any modules.txt file within a subdirectory of /usr/share/licenses will
be processed. While this isn't strictly a license file, it contains
information about the other sources that are included in the package.
Packages can include this file alongside the license files from the
vendored libraries as a summary of sorts. Alternatively, the modules.txt
can be marked with `%ghost`, which is sufficient for the generator.
There are not any other good places to install these files. %_docdir is
not an option, as generators do not search in that directory.

---

diff --git a/bin/vendor2provides.py b/bin/vendor2provides.py
new file mode 100755
index 0000000..7406721
--- /dev/null
+++ b/bin/vendor2provides.py
@@ -0,0 +1,54 @@
+#!/usr/bin/python3 -s
+
+# Parse modules.txt files into rpm .spec file Provides for bundled dependencies.
+# Written by Fabio "decathorpe" Valentini <decathorpe@fedoraproject.org> for
+# the fedora syncthing package: https://src.fedoraproject.org/rpms/syncthing
+# SPDX-License-Identifier: CC0-1.0 OR Unlicense
+
+# Modified by @gotmax23 to be used as a dependency generator
+# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-FileCopyrightText: 2022 Maxwell G <gotmax@e.email>
+
+import os
+import re
+import sys
+
+
+def process(path: str):
+    with open(path, encoding="utf-8") as file:
+        contents = file.read()
+
+    lines = contents.split("\n")
+
+    # dependencies = filter lines for "# package version"
+    dependencies = list(filter(lambda line: line.startswith("# "), lines))
+
+    # parse vendored dependencies into (import path, version) pairs
+    vendored = list()
+    # Handle => style replace directives
+    replace_regex = re.compile("^.+( v[0-9-\.]+)? => ")
+    for dep in dependencies:
+        ipath, version = replace_regex.sub("", dep[2:]).split(" ")[:2]
+
+        # check for git snapshots
+        if len(version) > 27:
+            # return only 7 digits of git commit hash
+            version = version[-12:-1][0:7]
+        else:
+            # strip off leading "v"
+            version = version.lstrip("v")
+
+        vendored.append((ipath, version))
+
+    for ipath, version in vendored:
+        print(f"bundled(golang({ipath})) = {version}")
+
+
+def main() -> None:
+    files = sys.stdin.read().splitlines()
+    for file in files:
+        process(file)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/rpm/fileattrs/go_mod_vendor.attr b/rpm/fileattrs/go_mod_vendor.attr
new file mode 100644
index 0000000..c796259
--- /dev/null
+++ b/rpm/fileattrs/go_mod_vendor.attr
@@ -0,0 +1,5 @@
+# SPDX-FileCopyrightText: 2022 Maxwell G <gotmax@e.email>
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+%__go_mod_vendor_path ^%{_defaultlicensedir}(/[^/]+)+/modules.txt$
+%__go_mod_vendor_provides %{_rpmconfigdir}/redhat/vendor2provides.py