chore: clean up nolint directives in act package (#864)

Removes 88 `nolint` directives (386 → 298) via mechanical, zero-regression cleanups:

- **38 `bodyclose`** in `act/artifactcache/handler_test.go`: replaced by `defer resp.Body.Close()` after each HTTP call.
- **21 dead directives** (`gocyclo`, `dogsled`, `contextcheck`): none of these linters are enabled in `.golangci.yml`, so the directives were doing nothing.
- **29 `testifylint`** directives whose underlying issues were addressed by mechanical rewrites:
  - `assert.Nil(t, err)` → `assert.NoError(t, err)`
  - `assert.NotNil(t, err)` → `assert.Error(t, err)`
  - `assert.Equal(t, true/false, x)` → `assert.True/False(t, x)`
  - `assert.Equal(t, 0, len(x))` → `assert.Empty(t, x)`
  - `assert.Equal(t, N, len(x))` → `assert.Len(t, x, N)`
  - `assert.Len(t, x, 0)` → `assert.Empty(t, x)`

Many `testifylint` directives still apply because they flag `require-error` (i.e. testifylint wants `require.NoError` instead of `assert.NoError` for early bail-out). That's a behavior change (fail-fast vs continue) and out of scope for this purely mechanical cleanup — those can be addressed in a follow-up. Same for `expected-actual`, `equal-values`, `error-is-as`, and the remaining `nilnil` / `unparam` / `forbidigo` / `staticcheck` / `goheader` / `dupl` directives.

`golangci-lint run` is clean. Tests pass for all touched packages.

---
This PR was written with the help of Claude Opus 4.7

Reviewed-on: https://gitea.com/gitea/act_runner/pulls/864
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: silverwind <2021+silverwind@noreply.gitea.com>
Co-committed-by: silverwind <2021+silverwind@noreply.gitea.com>

act/common/cartesian_test.go

@@ -35,9 +35,9 @@ func TestCartesianProduct(t *testing.T) {
 		"baz": {false, true},
 	}
 	output = CartesianProduct(input)
-	assert.Len(output, 0) //nolint:testifylint // pre-existing issue from nektos/act
+	assert.Empty(output)
 
 	input = map[string][]any{}
 	output = CartesianProduct(input)
-	assert.Len(output, 0) //nolint:testifylint // pre-existing issue from nektos/act
+	assert.Empty(output)
 }

act/common/executor_test.go

@@ -21,11 +21,11 @@ func TestNewWorkflow(t *testing.T) {
 
 	// empty
 	emptyWorkflow := NewPipelineExecutor()
-	assert.Nil(emptyWorkflow(ctx)) //nolint:testifylint // pre-existing issue from nektos/act
+	assert.NoError(emptyWorkflow(ctx)) //nolint:testifylint // pre-existing issue from nektos/act
 
 	// error case
 	errorWorkflow := NewErrorExecutor(errors.New("test error"))
-	assert.NotNil(errorWorkflow(ctx)) //nolint:testifylint // pre-existing issue from nektos/act
+	assert.Error(errorWorkflow(ctx)) //nolint:testifylint // pre-existing issue from nektos/act
 
 	// multiple success case
 	runcount := 0
@@ -38,7 +38,7 @@ func TestNewWorkflow(t *testing.T) {
 			runcount++
 			return nil
 		})
-	assert.Nil(successWorkflow(ctx)) //nolint:testifylint // pre-existing issue from nektos/act
+	assert.NoError(successWorkflow(ctx)) //nolint:testifylint // pre-existing issue from nektos/act
 	assert.Equal(2, runcount)
 }
 
@@ -60,7 +60,7 @@ func TestNewConditionalExecutor(t *testing.T) {
 		return nil
 	})(ctx)
 
-	assert.Nil(err) //nolint:testifylint // pre-existing issue from nektos/act
+	assert.NoError(err) //nolint:testifylint // pre-existing issue from nektos/act
 	assert.Equal(0, trueCount)
 	assert.Equal(1, falseCount)
 
@@ -74,7 +74,7 @@ func TestNewConditionalExecutor(t *testing.T) {
 		return nil
 	})(ctx)
 
-	assert.Nil(err) //nolint:testifylint // pre-existing issue from nektos/act
+	assert.NoError(err) //nolint:testifylint // pre-existing issue from nektos/act
 	assert.Equal(1, trueCount)
 	assert.Equal(1, falseCount)
 }
@@ -105,7 +105,7 @@ func TestNewParallelExecutor(t *testing.T) {
 
 	assert.Equal(int32(3), count.Load(), "should run all 3 executors")
 	assert.Equal(int32(2), maxCount.Load(), "should run at most 2 executors in parallel")
-	assert.Nil(err) //nolint:testifylint // pre-existing issue from nektos/act
+	assert.NoError(err) //nolint:testifylint // pre-existing issue from nektos/act
 
 	// Reset to test running the executor with 0 parallelism
 	count.Store(0)
@@ -116,7 +116,7 @@ func TestNewParallelExecutor(t *testing.T) {
 
 	assert.Equal(int32(3), count.Load(), "should run all 3 executors")
 	assert.Equal(int32(1), maxCount.Load(), "should run at most 1 executors in parallel")
-	assert.Nil(errSingle) //nolint:testifylint // pre-existing issue from nektos/act
+	assert.NoError(errSingle)
 }
 
 func TestNewParallelExecutorFailed(t *testing.T) {

act/common/git/git.go

@@ -302,8 +302,6 @@ func gitOptions(token string) (fetchOptions git.FetchOptions, pullOptions git.Pu
 }
 
 // NewGitCloneExecutor creates an executor to clone git repos
-//
-//nolint:gocyclo // function handles many cases
 func NewGitCloneExecutor(input NewGitCloneExecutorInput) common.Executor {
 	return func(ctx context.Context) error {
 		logger := common.Logger(ctx)