fix(hooks): propagate custom hook failures

cmd/soft/hook/hook.go

@@ -117,11 +117,9 @@ var (
 		}
 
 		// Custom hooks
-		if stat, err := os.Stat(customHookPath); err == nil && !stat.IsDir() && stat.Mode()&0o111 != 0 {
-			// If the custom hook is executable, run it
-			if err := runCommand(ctx, &buf, stdout, stderr, customHookPath, args...); err != nil {
-				logger.Error("failed to run custom hook", "err", err)
-			}
+		if err := runCustomHook(ctx, customHookPath, &buf, stdout, stderr, args...); err != nil {
+			logger.Error("failed to run custom hook", "err", err)
+			return err
 		}
 
 		return nil
@@ -170,3 +168,12 @@ func runCommand(ctx context.Context, in io.Reader, out io.Writer, err io.Writer,
 	cmd.Stderr = err
 	return cmd.Run()
 }
+
+func runCustomHook(ctx context.Context, path string, in io.Reader, out io.Writer, err io.Writer, args ...string) error {
+	stat, statErr := os.Stat(path)
+	if statErr != nil || stat.IsDir() || stat.Mode()&0o111 == 0 {
+		return nil
+	}
+
+	return runCommand(ctx, in, out, err, path, args...)
+}

cmd/soft/hook/hook_test.go

@@ -0,0 +1,69 @@
+package hook
+
+import (
+	"context"
+	"errors"
+	"io"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"testing"
+)
+
+func TestRunCustomHookPropagatesExitError(t *testing.T) {
+	executable, err := os.Executable()
+	if err != nil {
+		t.Fatal(err)
+	}
+	info, err := os.Stat(executable)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if info.Mode()&0o111 == 0 {
+		t.Skip("test binary is not executable on this platform")
+	}
+
+	t.Setenv("SOFT_SERVE_TEST_HELPER", "1")
+	t.Setenv("SOFT_SERVE_TEST_HELPER_EXIT", "1")
+	err = runCustomHook(
+		context.Background(),
+		executable,
+		io.Reader(nil),
+		io.Discard,
+		io.Discard,
+		"-test.run=TestCustomHookHelperProcess",
+	)
+	if err == nil {
+		t.Fatal("runCustomHook returned nil for a failing custom hook")
+	}
+
+	var exitErr *exec.ExitError
+	if !errors.As(err, &exitErr) {
+		t.Fatalf("runCustomHook error = %T %v, want exec.ExitError", err, err)
+	}
+}
+
+func TestRunCustomHookIgnoresMissingOrNonExecutableHook(t *testing.T) {
+	missing := filepath.Join(t.TempDir(), "missing-hook")
+	if err := runCustomHook(context.Background(), missing, nil, io.Discard, io.Discard); err != nil {
+		t.Fatalf("runCustomHook(missing) error = %v", err)
+	}
+
+	nonExecutable := filepath.Join(t.TempDir(), "non-executable-hook")
+	if err := os.WriteFile(nonExecutable, []byte("exit 1\n"), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	if err := runCustomHook(context.Background(), nonExecutable, nil, io.Discard, io.Discard); err != nil {
+		t.Fatalf("runCustomHook(non-executable) error = %v", err)
+	}
+}
+
+func TestCustomHookHelperProcess(t *testing.T) {
+	if os.Getenv("SOFT_SERVE_TEST_HELPER") != "1" {
+		return
+	}
+	if os.Getenv("SOFT_SERVE_TEST_HELPER_EXIT") == "1" {
+		os.Exit(1)
+	}
+	os.Exit(0)
+}