OPC # 0006: OPC Git Trunk-Based management

Co-authored-by: Copilot <copilot@github.com>
2026-04-26 14:30:10 -04:00
parent 5e969a2b3e
commit bb0c6e08c7
5 changed files with 114 additions and 10 deletions
@@ -787,6 +787,64 @@ public class PromotionService(IConfiguration config, ILogger<PromotionService> l
            return [];
        }
    }
+
+    /// <summary>
+    /// Returns distinct, sorted OPC numbers for commits reachable from <paramref name="toSha"/>
+    /// that are NOT reachable from <paramref name="fromSha"/> — i.e. the exact delta for this release.
+    /// Falls back to <see cref="ExtractOpcNumbersAsync"/> (last 50 commits) when <paramref name="fromSha"/>
+    /// is null (first-ever release for this environment).
+    /// </summary>
+    public Task<List<string>> ExtractOpcNumbersDeltaAsync(
+        string  repoName,
+        string  toSha,
+        string? fromSha,
+        CancellationToken ct = default) =>
+        fromSha is null
+            ? ExtractOpcNumbersAsync(repoName, ct: ct)
+            : Task.Run(() => ExtractOpcNumbersDeltaCore(repoName, toSha, fromSha), ct);
+
+    private List<string> ExtractOpcNumbersDeltaCore(string repoName, string toSha, string fromSha)
+    {
+        var repoPath = GetRepoPath(repoName);
+        if (string.IsNullOrWhiteSpace(repoPath) || !Directory.Exists(repoPath))
+            return [];
+        try
+        {
+            using var repo = new Repository(repoPath);
+            var toCommit   = repo.Lookup<Commit>(toSha);
+            var fromCommit = repo.Lookup<Commit>(fromSha);
+            if (toCommit is null) return [];
+
+            var filter = fromCommit is null
+                ? new CommitFilter { IncludeReachableFrom = toCommit }
+                : new CommitFilter { IncludeReachableFrom = toCommit, ExcludeReachableFrom = fromCommit };
+
+            var set = new HashSet<string>(StringComparer.Ordinal);
+            foreach (var commit in repo.Commits.QueryBy(filter))
+                foreach (System.Text.RegularExpressions.Match m in OpcTagPattern.Matches(commit.Message))
+                    set.Add($"OPC # {m.Groups[1].Value.PadLeft(4, '0')}");
+
+            return [.. set.OrderBy(x => x)];
+        }
+        catch (Exception ex)
+        {
+            logger.LogWarning(ex, "ExtractOpcNumbersDelta failed for {Repo} {From}..{To}", repoName, fromSha[..7], toSha[..7]);
+            return [];
+        }
+    }
+
+    /// <summary>Returns the full HEAD SHA of <paramref name="branch"/> in <paramref name="repoName"/>, or null.</summary>
+    public string? GetBranchTipSha(string repoName, string branch)
+    {
+        var repoPath = GetRepoPath(repoName);
+        if (string.IsNullOrWhiteSpace(repoPath) || !Directory.Exists(repoPath)) return null;
+        try
+        {
+            using var repo = new Repository(repoPath);
+            return (repo.Branches[$"origin/{branch}"] ?? repo.Branches[branch])?.Tip?.Sha;
+        }
+        catch { return null; }
+    }
 }

 /// <summary>A single unreleased commit — carries full SHA for cherry-pick operations.</summary>