diff options
Diffstat (limited to 'mod/mod-ci-github.cxx')
| -rw-r--r-- | mod/mod-ci-github.cxx | 158 |
1 files changed, 126 insertions, 32 deletions
diff --git a/mod/mod-ci-github.cxx b/mod/mod-ci-github.cxx index d5131cf..dbc0c4b 100644 --- a/mod/mod-ci-github.cxx +++ b/mod/mod-ci-github.cxx @@ -493,6 +493,76 @@ namespace brep } } + // The merge commits of any open pull requests with this branch as base + // branch will now be out of date, and thus so will be their CI builds and + // associated check runs (and, no, GitHub does not invalidate those CI + // results automatically; see below). + // + // Unfortunately GitHub does not provide a webhook for PR base branch + // updates (as it does for PR head branch updates) so we have to handle it + // here. We do so by fetching the open pull requests with this branch as + // base branch and then recreating the CI requests (cancel existing, + // create new) for each pull request. + // + // If we fail to recreate any of the PR CI requests, they and their check + // runs will be left reflecting outdated merge commits. If the new merge + // commit failed to be generated (merge conflicts) the PR will not be + // mergeable which is not entirely catastrophic. But on the other hand, if + // all of the existing CI request's check runs have already succeeded and + // the new merge commit succeeds (no conflicts) with logic errors then a + // user would be able to merge a broken PR. + // + // Regardless of the nature of the error, we have to let the check suite + // handling code proceed so we only issue diagnostics. Note also that we + // want to run this code as early as possible to minimize the window of + // the user seeing misleading CI results. + // + { + // Fetch open pull requests with the check suite's head branch as base + // branch. + // + optional<vector<gh_pull_request>> prs ( + gq_fetch_open_pull_requests (error, + iat->token, + sd.repository_node_id, + cs.check_suite.head_branch)); + + if (prs) + { + // Recreate each PR's CI request. + // + for (gh_pull_request& pr: *prs) + { + service_data prsd (sd.warning_success, + sd.installation_access.token, + sd.installation_access.expires_at, + sd.installation_id, + sd.repository_node_id, + pr.head_sha, + cs.repository.clone_url, + pr.number); + + // Cancel the existing CI request and create a new unloaded CI + // request. After this call we will start getting the + // build_unloaded() notifications until (1) we load the request, (2) + // we cancel it, or (3) it gets archived after some timeout. + // + if (!create_pull_request_ci (error, warn, trace, + prsd, pr.node_id, + true /* cancel_first */)) + { + error << "pull request " << pr.node_id + << ": unable to create unloaded CI request"; + } + } + } + else + { + error << "unable to fetch open pull requests with base branch " + << cs.check_suite.head_branch; + } + } + // Start CI for the check suite. // repository_location rl (cs.repository.clone_url + '#' + @@ -672,33 +742,27 @@ namespace brep l3 ([&]{trace << "installation_access_token { " << *iat << " }";}); - string sd (service_data (warning_success, - move (iat->token), - iat->expires_at, - pr.installation.id, - move (pr.repository.node_id), - pr.pull_request.head_sha, - pr.repository.clone_url, - pr.pull_request.number) - .json ()); - - // Create unloaded CI request. After this call we will start getting the - // build_unloaded() notifications until (1) we load the request, (2) we - // cancel it, or (3) it gets archived after some timeout. + service_data sd (warning_success, + move (iat->token), + iat->expires_at, + pr.installation.id, + move (pr.repository.node_id), + pr.pull_request.head_sha, + pr.repository.clone_url, + pr.pull_request.number); + + // Create unloaded CI request. Cancel the existing CI request first if the + // head branch has been updated (action is `synchronize`). // - // Note: use no delay since we need to (re)create the synthetic merge - // check run as soon as possible. + // After this call we will start getting the build_unloaded() + // notifications until (1) we load the request, (2) we cancel it, or (3) + // it gets archived after some timeout. // - optional<string> tid ( - create (error, warn, &trace, - *build_db_, - tenant_service (move (pr.pull_request.node_id), - "ci-github", - move (sd)), - chrono::seconds (30) /* interval */, - chrono::seconds (0) /* delay */)); - - if (!tid) + bool cancel_first (pr.action == "synchronize"); + + if (!create_pull_request_ci (error, warn, trace, + sd, pr.pull_request.node_id, + cancel_first)) { fail << "pull request " << pr.pull_request.node_id << ": unable to create unloaded CI request"; @@ -707,6 +771,8 @@ namespace brep return true; } + // Note: only handles pull requests (not check suites). + // function<optional<string> (const tenant_service&)> ci_github:: build_unloaded (tenant_service&& ts, const diag_epilogue& log_writer) const noexcept @@ -909,14 +975,11 @@ namespace brep // Cancel the CI request. // + // Ignore failure because this CI request may have been cancelled + // elsewhere due to an update to the PR base or head branches. + // if (!cancel (error, warn, &trace, *build_db_, ts.type, ts.id)) - { - // Nothing we can do but also highly unlikely. - // - error << "unable to cancel CI request: " - << "no tenant for service type/ID " - << ts.type << '/' << ts.id; - } + l3 ([&]{trace << "CI for PR " << ts.id << " already cancelled";}); return nullptr; // No need to update service data in this case. } @@ -1819,6 +1882,37 @@ namespace brep }; } + bool ci_github:: + create_pull_request_ci (const basic_mark& error, + const basic_mark& warn, + const basic_mark& trace, + const service_data& sd, + const string& nid, + bool cf) const + { + // Cancel the existing CI request if asked to do so. Ignore failure + // because the request may already have been cancelled for other reasons. + // + if (cf) + { + if (!cancel (error, warn, &trace, *build_db_, "ci-github", nid)) + l3 ([&] {trace << "unable to cancel CI for pull request " << nid;}); + } + + // Create a new unloaded CI request. + // + tenant_service ts (nid, "ci-github", sd.json ()); + + // Note: use no delay since we need to (re)create the synthetic merge + // check run as soon as possible. + // + return create (error, warn, &trace, + *build_db_, move (ts), + chrono::seconds (30) /* interval */, + chrono::seconds (0) /* delay */) + .has_value (); + } + string ci_github:: details_url (const build& b) const { |