fix(depot): exit 64 on unset DEPOT_DIR, count push transport failures

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

internal/depot/run_test.go

@@ -3,6 +3,7 @@ package depot
 import (
 	"bytes"
 	"fmt"
+	"net/http"
 	"net/http/httptest"
 	"os"
 	"path/filepath"
@@ -30,6 +31,19 @@ func TestRunUsage(t *testing.T) {
 		}
 	})
 
+	t.Run("status --target local without DEPOT_DIR", func(t *testing.T) {
+		dir := t.TempDir()
+		writeManifest(t, dir, shaOf("blob-a"), 5)
+		var out, errb bytes.Buffer
+		code := Run([]string{"status", "--manifests", dir, "--target", "local"}, &out, &errb, testGetenv(nil))
+		if code != 64 {
+			t.Fatalf("expected 64, got %d (stderr=%s)", code, errb.String())
+		}
+		if !bytesContains(errb.String(), "DEPOT_DIR") {
+			t.Fatalf("expected stderr to mention DEPOT_DIR, got %s", errb.String())
+		}
+	})
+
 	t.Run("push --target cdn rejected", func(t *testing.T) {
 		dir := t.TempDir()
 		var out, errb bytes.Buffer
@@ -116,6 +130,43 @@ func TestStatusExitCodes(t *testing.T) {
 	})
 }
 
+func TestPushTransportErrorCountsFailed(t *testing.T) {
+	// Probes 404 (blob absent), PUTs 500 (transport-level upload failure).
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method == http.MethodPut {
+			w.WriteHeader(500)
+			return
+		}
+		w.WriteHeader(404)
+	}))
+	defer srv.Close()
+
+	sha := shaOf("push-fail-blob")
+	manifestsDir := t.TempDir()
+	writeManifest(t, manifestsDir, sha, 14)
+	sourceDir := t.TempDir()
+	blobPath := filepath.Join(sourceDir, BlobKey(sha))
+	if err := os.MkdirAll(filepath.Dir(blobPath), 0755); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(blobPath, []byte("push-fail-blob"), 0644); err != nil {
+		t.Fatal(err)
+	}
+
+	var out, errb bytes.Buffer
+	code := Run([]string{"push", "--manifests", manifestsDir, "--source", sourceDir, "--target", "bunny"}, &out, &errb,
+		testGetenv(map[string]string{
+			"BUNNY_STORAGE_HOST":     hostPort(srv),
+			"BUNNY_STORAGE_PASSWORD": "writekey",
+		}))
+	if code != 70 {
+		t.Fatalf("expected 70, got %d (stdout=%s stderr=%s)", code, out.String(), errb.String())
+	}
+	if !bytesContains(out.String(), "uploaded=0 failed=1") {
+		t.Fatalf("expected uploaded=0 failed=1, got %s", out.String())
+	}
+}
+
 func bytesContains(s, substr string) bool {
 	return bytes.Contains([]byte(s), []byte(substr))
 }