Expose tagged-source delivery through facade and CLI

internal/git/source_test.go

@@ -0,0 +1,46 @@
+package git
+
+import (
+	"context"
+	"strings"
+	"testing"
+)
+
+func TestInspectTaggedSourceSupportsLightweightAndAnnotatedTags(t *testing.T) {
+	fixture := newRemoteFixture(t)
+	gitRun(t, fixture.work, "tag", "v1.2.3")
+	gitRun(t, fixture.work, "checkout", "--detach", "HEAD")
+	lightweight, err := InspectTaggedSource(context.Background(), fixture.work, "v1.2.3")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if lightweight.Head != fixture.commit || lightweight.TagCommit != fixture.commit || lightweight.TagObject != fixture.commit || lightweight.TagObjectType != "commit" || lightweight.Status != "" {
+		t.Fatalf("lightweight source = %#v", lightweight)
+	}
+	gitRun(t, fixture.work, "tag", "-d", "v1.2.3")
+	gitRun(t, fixture.work, "tag", "-a", "v1.2.3", "-m", "Historical release")
+	annotated, err := InspectTaggedSource(context.Background(), fixture.work, "v1.2.3")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if annotated.Head != fixture.commit || annotated.TagCommit != fixture.commit || annotated.TagObject == fixture.commit || annotated.TagObjectType != "tag" || annotated.Status != "" {
+		t.Fatalf("annotated source = %#v", annotated)
+	}
+}
+
+func TestInspectTaggedSourceReportsDirtyCheckoutAndReadCommitFile(t *testing.T) {
+	fixture := newRemoteFixture(t)
+	gitRun(t, fixture.work, "tag", "v1.2.3")
+	content, err := ReadCommitFile(context.Background(), fixture.work, fixture.commit, "source.txt")
+	if err != nil || string(content) != "candidate" {
+		t.Fatalf("committed content = %q, error = %v", content, err)
+	}
+	writeRepoFile(t, fixture.work, "untracked.txt", "dirty")
+	source, err := InspectTaggedSource(context.Background(), fixture.work, "v1.2.3")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !strings.Contains(source.Status, "untracked.txt") {
+		t.Fatalf("dirty status = %q", source.Status)
+	}
+}