format/commitgraph: Add initial commit-graph support

1 files changed, 37 insertions, 0 deletions

diff --git a/internal/testgit/repo_rev_list.go b/internal/testgit/repo_rev_list.go
new file mode 100644
index 00000000..d3adf5a0
--- /dev/null
+++ b/internal/testgit/repo_rev_list.go
@@ -0,0 +1,37 @@
+package testgit
+
+import (
+	"strings"
+	"testing"
+
+	"codeberg.org/lindenii/furgit/objectid"
+)
+
+// RevList runs "git rev-list" with args and parses one object ID per line.
+func (testRepo *TestRepo) RevList(tb testing.TB, args ...string) []objectid.ObjectID {
+	tb.Helper()
+
+	cmdArgs := make([]string, 0, len(args)+1)
+	cmdArgs = append(cmdArgs, "rev-list")
+	cmdArgs = append(cmdArgs, args...)
+	out := testRepo.Run(tb, cmdArgs...)
+
+	lines := strings.Split(strings.TrimSpace(out), "\n")
+
+	outIDs := make([]objectid.ObjectID, 0, len(lines))
+	for _, line := range lines {
+		line = strings.TrimSpace(line)
+		if line == "" {
+			continue
+		}
+
+		id, err := objectid.ParseHex(testRepo.algo, line)
+		if err != nil {
+			tb.Fatalf("parse rev-list oid %q: %v", line, err)
+		}
+
+		outIDs = append(outIDs, id)
+	}
+
+	return outIDs
+}