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// file : mod/mod-ci-github-gq.hxx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
#ifndef MOD_MOD_CI_GITHUB_GQ_HXX
#define MOD_MOD_CI_GITHUB_GQ_HXX
#include <libbrep/types.hxx>
#include <libbrep/utility.hxx>
#include <libbrep/build.hxx>
#include <mod/tenant-service.hxx> // build_hints
#include <mod/mod-ci-github-gh.hxx>
#include <mod/mod-ci-github-service-data.hxx>
namespace brep
{
// GraphQL functions (all start with gq_).
//
// Create a new check run on GitHub for each build. Update `check_runs` with
// the new data (node id, state, and state_synced). Return false and issue
// diagnostics if the request failed.
//
// Note: no details_url yet since there will be no entry in the build result
// search page until the task starts building.
//
// Note that creating a check_run named `foo` will effectively replace any
// existing check_runs with that name. They will still exist on the GitHub
// servers but GitHub will only consider the latest one (for display in the
// UI or in determining the mergeability of a PR).
//
bool
gq_create_check_runs (const basic_mark& error,
vector<check_run>& check_runs,
const string& installation_access_token,
const string& repository_id,
const string& head_sha,
build_state);
// Create a new check run on GitHub for a build. Update `cr` with the new
// data (node id, state, and state_synced). Return false and issue
// diagnostics if the request failed.
//
// If the details_url is absent GitHub will use the app's homepage.
//
// The gq_built_result is required if the build_state is built because
// GitHub does not allow a check run status of `completed` without at least
// a conclusion.
//
struct gq_built_result
{
string conclusion;
string title;
string summary;
};
bool
gq_create_check_run (const basic_mark& error,
check_run& cr,
const string& installation_access_token,
const string& repository_id,
const string& head_sha,
const optional<string>& details_url,
build_state,
optional<gq_built_result> = nullopt);
// Update a check run on GitHub.
//
// Send a GraphQL request that updates an existing check run. Update `cr`
// with the new data (state and state_synced). Return false and issue
// diagnostics if the request failed.
//
// Note that GitHub allows any state transitions except from built (but
// built to built is allowed). The latter case is signalled by setting the
// check_run state_synced member to false and the state member to built.
//
// If the details_url is absent GitHub will use the app's homepage.
//
// The gq_built_result is required if the build_state is built because
// GitHub does not allow a check run status of `completed` without at least
// a conclusion.
//
bool
gq_update_check_run (const basic_mark& error,
check_run& cr,
const string& installation_access_token,
const string& repository_id,
const string& node_id,
const optional<string>& details_url,
build_state,
optional<gq_built_result> = nullopt);
// Fetch pre-check information for a pull request from GitHub. This
// information is used to decide whether or not to CI the PR and is
// comprised of the PR's head commit SHA, whether its head branch is behind
// its base branch, and its mergeability and test merge commit SHA.
//
// Return absent value if the merge commit is still being generated (which
// means PR head branch behindness is not yet known either). See the
// gq_pr_pre_check struct's member comments for non-absent return value
// semantics.
//
// Issue diagnostics and return absent if the request failed (which means it
// will be treated by the caller as still being generated).
//
// Note that the first request causes GitHub to start preparing the test
// merge commit.
//
// For details regarding the test merge commit and how to check/poll for PR
// mergeability see
// https://docs.github.com/en/rest/pulls/pulls?#get-a-pull-request and
// https://docs.github.com/en/rest/guides/using-the-rest-api-to-interact-with-your-git-database?#checking-mergeability-of-pull-requests
//
struct gq_pr_pre_check_info
{
// The PR head commit id.
//
string head_sha;
// True if the PR's head branch is behind its base branch.
//
bool behind;
// The commit id of the test merge commit. Absent if behind or the PR is
// not auto-mergeable.
//
optional<string> merge_commit_sha;
};
optional<gq_pr_pre_check_info>
gq_fetch_pull_request_pre_check_info (
const basic_mark& error,
const string& installation_access_token,
const string& node_id);
}
#endif // MOD_MOD_CI_GITHUB_GQ_HXX
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