ignition/go-mods-to-bundled-provides.py
Petr Šabata fbcc99b05d RHEL 9.0.0 Alpha bootstrap
The content of this branch was automatically imported from Fedora ELN
with the following as its source:
https://src.fedoraproject.org/rpms/ignition#2c158893d7617700b1fad728ab55ec26c086597d
2020-10-15 13:36:02 +02:00

85 lines
2.2 KiB
Python
Executable File

#!/usr/bin/env python3
'''
Tiny dumb script that generates virtual bundled `Provides` from a repo that
uses go modules and vendoring.
'''
import sys
import re
def main():
repos = get_repos_from_go_mod()
print_provides_from_modules_txt(repos)
def get_repos_from_go_mod():
repos = {}
in_reqs = False
for line in open('go.mod'):
line = line.strip()
if in_reqs and line.startswith(')'):
break
if not in_reqs:
if line.startswith('require ('):
in_reqs = True
continue
req = line.split()
repo = req[0]
tag = req[1]
repos[repo] = go_mod_tag_to_rpm_provides_version(tag)
return repos
def go_mod_tag_to_rpm_provides_version(tag):
# go.mod tags are either exact git tags, or may be "pseudo-versions". We
# want to convert these tags to something resembling a version string that
# RPM won't fail on. For more information, see
# https://golang.org/cmd/go/#hdr-Pseudo_versions and following sections.
# trim off any +incompatible
if tag.endswith('+incompatible'):
tag = tag[:-len('+incompatible')]
# git tags are normally of the form v$VERSION
if tag.startswith('v'):
tag = tag[1:]
# is this a pseudo-version? e.g. v0.0.0-20181031085051-9002847aa142
m = re.match("(.*)-([0-9]{14})-([a-f0-9]{12})", tag)
if m:
# rpm doesn't like multiple dashes in the version, so just merge the
# timestamp and the commit checksum into the "release" field
tag = f"{m.group(1)}-{m.group(2)}.git{m.group(3)}"
return tag
def print_provides_from_modules_txt(repos):
for line in open('vendor/modules.txt'):
if line.startswith('#'):
continue
gopkg = line.strip()
repo = lookup_repo_for_pkg(repos, gopkg)
if not repo:
# must be a pkg for tests only; ignore
continue
tag = repos[repo]
print(f"Provides: bundled(golang({gopkg})) = {tag}")
def lookup_repo_for_pkg(repos, gopkg):
for repo in repos:
if gopkg.startswith(repo):
return repo
if __name__ == '__main__':
sys.exit(main())