tarball: Implement checkout for specific commit

We often need not ToT, but specific commit, implement this.

Signed-off-by: Denys Fedoryshchenko <denys.f@collabora.com>

src/tarball.py

@@ -58,6 +58,21 @@ def _find_build_config(self, node):
  if config.tree.name == tree and config.branch == branch:
  return config
 
+ def _find_build_commit(self, node):
+ revision = node['data'].get('kernel_revision')
+ commit = revision.get('commit')
+ return commit
+
+ def _checkout_commitid(self, commitid):
+ self.log.info(f"Checking out commit {commitid}")
+ # i might need something from kernelci.build
+ # but i prefer to implement it myself
+ cwd = os.getcwd()
+ os.chdir(self._service_config.kdir)
+ kernelci.shell_cmd(f"git checkout {commitid}", self._service_config.kdir)
+ os.chdir(cwd)
+ self.log.info("Commit checked out")
+
  def _update_repo(self, config):
  '''
  Return True - if failed to update repo and need to retry
@@ -185,6 +200,15 @@ def _run(self, sub_id):
  'Failed to init/update git repo')
  os._exit(1)
 
+ commitid = self._find_build_commit(checkout_node)
+ if commitid is None:
+ self.log.error("Failed to find commit id")
+ self._update_failed_checkout_node(checkout_node,
+ 'git_checkout_failure',
+ 'Failed to find commit id')
+ os._exit(1)
+ self._checkout_commitid(commitid)
+
  describe = kernelci.build.git_describe(
  build_config.tree.name, self._service_config.kdir
  )