/// <summary>
/// <para>
/// Deletes workflow runs from a GitHub repo.
/// </para>
/// <note>
/// Only completed runs will be deleted.
/// </note>
/// </summary>
/// <param name="repo">Identifies the target repository.</param>
/// <param name="workflowName">
/// Optionally specifies the workflow whose runs are to be deleted otherwise
/// runs from all workflows in the repo will be deleted.
/// </param>
/// <param name="maxAge">
/// Optionally specifies the maximum age for retained workflow runs. This
/// defaults to <see cref="TimeSpan.Zero"/> which deletes all runs.
/// </param>
/// <returns>The number of runs deleted.</returns>
public async Task <int> DeleteRunsAsync(string repo, string workflowName = null, TimeSpan maxAge = default)
{
await SyncContext.Clear;
GitHub.GetCredentials();
var repoPath = GitHubRepoPath.Parse(repo);
var deleteCount = 0;
using (var client = new HttpClient())
{
var retry = new ExponentialRetryPolicy(TransientDetector.NetworkOrHttp, 5);
client.BaseAddress = new Uri("https://api.github.com");
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", GitHub.AccessToken);
client.DefaultRequestHeaders.UserAgent.Add(new ProductInfoHeaderValue("neonforge.com", "0"));
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/vnd.github.v3+json"));
// List all of the workflow runs for the repo, paging to get all of them.
//
// https://docs.github.com/en/rest/reference/actions#list-workflow-runs-for-a-repository
var runs = new List <RunInfo>();
var page = 1;
while (true)
{
var response = await retry.InvokeAsync(
async() =>
{
var request = new HttpRequestMessage(HttpMethod.Get, $"/repos/{repoPath.Owner}/{repoPath.Repo}/actions/runs?page={page}");
// We're seeing some 502 Bad Gateway responses from GHCR.io. We're going to
// treat these as transients.
var response = await client.SendAsync(request);
if (response.StatusCode == HttpStatusCode.BadGateway)
{
throw new TransientException("503 (Bad Gateway)");
}
return(response);
});
response.EnsureSuccessStatusCode();
var json = response.Content.ReadAsStringAsync().Result;
var result = JsonConvert.DeserializeObject <dynamic>(json);
var workflowRuns = result.workflow_runs;
if (workflowRuns.Count == 0)
{
// We've seen all of the runs.
break;
}
foreach (var run in workflowRuns)
{
runs.Add(
new RunInfo()
{
Id = run.id,
Name = run.name,
Status = run.status,
UpdatedAtUtc = run.updated_at
});
}
page++;
}
// Here's the reference for deleting runs:
//
// https://docs.github.com/en/rest/reference/actions#delete-a-workflow-run
var minDate = DateTime.UtcNow - maxAge;
var selectedRuns = runs.Where(run => run.UpdatedAtUtc < minDate && run.Status == "completed");
if (!string.IsNullOrEmpty(workflowName))
{
selectedRuns = selectedRuns.Where(run => run.Name.Equals(workflowName, StringComparison.InvariantCultureIgnoreCase));
}
foreach (var run in selectedRuns)
{
var response = await retry.InvokeAsync(
async() =>
{
var request = new HttpRequestMessage(HttpMethod.Delete, $"/repos/{repoPath.Owner}/{repoPath.Repo}/actions/runs/{run.Id}");
return(await client.SendAsync(request));
});
// We're also seeing some 500s but I'm not sure why. We'll ignore these
// for now.
if (response.StatusCode == HttpStatusCode.InternalServerError)
{
Task.Delay(TimeSpan.FromSeconds(2)).WaitWithoutAggregate(); // Pause in case this is a rate-limit thing
continue;
}
// We're seeing 403s for some runs, so we'll ignore those too.
if (response.StatusCode != HttpStatusCode.Forbidden)
{
response.EnsureSuccessStatusCode();
}
deleteCount++;
}
}
return(deleteCount);
}
