public async Task <MergePolicyEvaluationResult> EvaluateAsync(
string prUrl,
IRemote darc,
IReadOnlyList <MergePolicyDefinition> policyDefinitions)
{
var context = new MergePolicyEvaluationContext(prUrl, darc);
foreach (MergePolicyDefinition definition in policyDefinitions)
{
if (MergePolicies.TryGetValue(definition.Name, out MergePolicy policy))
{
using (Logger.BeginScope("Evaluating Merge Policy {policyName}", policy.Name))
{
context.CurrentPolicy = policy;
await policy.EvaluateAsync(context, new MergePolicyProperties(definition.Properties));
}
}
else
{
context.CurrentPolicy = null;
context.Fail($"Unknown Merge Policy: '{definition.Name}'");
}
}
return(context.Result);
}
private async Task <string> CheckMergePolicyInternalAsync(
IRemote darc,
IList <MergePolicyDefinition> policyDefinitions,
InProgressPullRequest pr)
{
var results = new List <(MergePolicy policy, MergePolicyEvaluationResult result)>();
if (policyDefinitions != null)
{
foreach (MergePolicyDefinition policyDefinition in policyDefinitions)
{
var context = new MergePolicyEvaluationContext(pr.Url, darc, Logger, policyDefinition.Properties);
if (PolicyEvaluators.TryGetValue(policyDefinition.Name, out MergePolicy policyEvaluator))
{
MergePolicyEvaluationResult result = await policyEvaluator.EvaluateAsync(context);
results.Add((policyEvaluator, result));
}
else
{
results.Add((null, context.Fail($"Unknown Merge Policy '{policyDefinition.Name}'")));
}
}
}
if (results.Count == 0)
{
await UpdateStatusCommentAsync(
darc,
pr,
$@"## Auto-Merge Status
This pull request will not be merged automatically because the subscription with id '{SubscriptionId}' does not have any merge policies.");
return(NotMergedNoPolicies());
}
string DisplayPolicy((MergePolicy policy, MergePolicyEvaluationResult result) p)
{
(MergePolicy policy, MergePolicyEvaluationResult result) = p;
if (policy == null)
{
return($"- ❌ **{result.Message}**");
}
if (result.Succeeded)
{
return($"- ✔️ **{policy.DisplayName}** Succeeded");
}
return($"- ❌ **{policy.DisplayName}** {result.Message}");
}
if (results.Any(r => !r.result.Succeeded))
{
await UpdateStatusCommentAsync(
darc,
pr,
$@"## Auto-Merge Status
This pull request has not been merged because the subscription with id '{SubscriptionId}' is waiting on the following merge policies.
{string.Join("\n", results.OrderBy(r => r.policy == null ? " " : r.policy.Name).Select(DisplayPolicy))}");
return(NotMergedFailedPolicies(results.Where(r => !r.result.Succeeded), pr.Url));
}
await UpdateStatusCommentAsync(
darc,
pr,
$@"## Auto-Merge Status
This pull request has been merged because the following merge policies have succeeded.
{string.Join("\n", results.OrderBy(r => r.policy == null ? " " : r.policy.Name).Select(DisplayPolicy))}");
await darc.MergePullRequestAsync(pr.Url, null);
return(Merged(policyDefinitions, pr.Url));
}