Detect and rewrite versions

Fetch latest tag from GitHub API and detect if it requires a pattern rewrite.
Currently supports tagged releases starting with "v".

Signed-off-by: Georg Pfuetzenreuter <mail@georg-pfuetzenreuter.net>

opam2rpm.py

@@ -73,12 +73,26 @@ class parse_opam():
         log.debug(f'Returning info dict: {self.info}')
         return self.info
 
+def get_latest_tag(repository):
+    url = f'https://api.github.com/repos/{repository}/tags'
+    result = requests.get(url)
+    status = result.status_code
+    logmsg = f'{url} returned {status}'
+    if status != 200:
+        _fail(logmsg)
+    log.debug(logmsg)
+    tag = result.json()[0]['name']
+    log.debug(f'Found latest tag: {tag}')
+    return tag
+
 def parse_homepage(homepage):
     if 'github.com' in homepage:
         repository_url = f'{homepage}.git'
         log.debug(f'Set repository URL to {repository_url}')
-        repository_name = homepage.rsplit('/')[-1]
+        hpsplit = homepage.rsplit('/')
+        repository_name = hpsplit[-1]
         log.debug(f'Set repository name to {repository_name}')
+        latest_tag = get_latest_tag('/'.join(hpsplit[3:]))
     # add parsing for other common homepages here
     else:
         _fail(f'Unsupported homepage: {homepage}')
@@ -88,7 +102,7 @@ def parse_homepage(homepage):
     else:
         is_prefixed = False
 
-    return repository_url, repository_name, is_prefixed
+    return repository_url, repository_name, is_prefixed, latest_tag
 
 def evaluate_prefixing(upstream_prefixed):
     if upstream_prefixed and downstream_prefixed:
@@ -131,14 +145,14 @@ def manglepkgname(srcname, add_prefix):
         pkgname = srcname
     return pkgname
 
-def render(name, srcname, url, license, buildrequires, prefixed, vcs_url=None):
+def render(name, srcname, url, license, buildrequires, prefixed, version, vcs_url=None):
     if not vcs_url:
         vcs_url = url
     templenv = jinja2.Environment(loader=jinja2.FileSystemLoader(searchpath=f'{mydir}/templates'))
     template_service = templenv.get_template('service')
     template_spec = templenv.get_template('ultimate.spec')
     log.debug(f'Rendering {template_spec}')
-    rendered_service = template_service.render(pkgname=name, url=vcs_url)
+    rendered_service = template_service.render(pkgname=name, url=vcs_url, version=version)
     rendered_spec = template_spec.render(pkgname=srcname, url=url, buildrequires=buildrequires, license=license, mode='dune', do_prefix=prefixed)
 
     log.debug(f'Service: {rendered_service}')
@@ -172,12 +186,12 @@ def spec_cleaner(file):
 def main():
     opam_package = parse_opam(query_opam(args.package))
     info = opam_package.get_info()
-    repository_url, name, is_prefixed = parse_homepage(info['Homepage'])
+    repository_url, name, is_prefixed, version = parse_homepage(info['Homepage'])
     add_prefix = evaluate_prefixing(is_prefixed)
     dependencies = parse_dependencies(info['Dependencies'])
     srcname = manglesrcname(name)
     pkgname = manglepkgname(name, add_prefix)
-    data_service, data_spec = render(name, srcname, info['Homepage'], info['License'], dependencies, add_prefix, repository_url)
+    data_service, data_spec = render(name, srcname, info['Homepage'], info['License'], dependencies, add_prefix, version, repository_url)
     prjdir = args.obs_project_dir
     if prjdir:
         if not os.path.isfile(f'{prjdir}/.osc/_project'):

templates/service

@@ -4,6 +4,9 @@
     <param name="scm">git</param>
     <param name="revision">@PARENT_TAG@</param>
     <param name="versionformat">@PARENT_TAG@</param>
+    {%- if version.startswith('v') %}
+    <param name="versionrewrite-pattern">v(.*)</param>
+    {%- endif %}
     <param name="changesgenerate">enable</param>
   </service>
   <service mode="buildtime" name="tar">