feat(actions): update actionslib, support self:, misc fixes (#39358)

Updates actionslib to https://gitea.com/gitea/actionslib/releases/tag/v1.2.1, moves workflow
parsing into it and aligns behaviour with GitHub.

1. `uses:` supports `self:` (Gitea-only feature) and `$/` paths.
1. `strategy`, `matrix`, `max-parallel` and `fail-fast` accept
expressions, including over `needs`. A job whose `name`, `runs-on` or
`continue-on-error` reads `needs` is resolved once they finish.
1. A job `if:` may only read `github`, `needs`, `vars` and `inputs` and
is decided before the matrix, as on github.com.
1. Matrix `fail-fast` cancels the other combinations, and `always()`
jobs keep running when a run is cancelled.
1. Invalid workflow files, including a malformed `on:` and unknown or
cyclic `needs`, show up on push as failed runs with the error.
1. A job whose `if:` or `concurrency:` fails to evaluate is skipped or
failed with the error, instead of staying blocked.
1. Reusable workflows: a missing and an unreadable repository fail
alike, public callers cannot use private workflows, nested jobs cannot
exceed the caller's token permissions.
1. Runner labels match case-insensitively, and `runs-on` accepts an
array from an expression.

Runner PR: https://gitea.com/gitea/runner/pulls/1247
Docs PR: https://gitea.com/gitea/docs/pulls/553
Fixes: https://github.com/go-gitea/gitea/issues/38990
Fixes: https://github.com/go-gitea/gitea/issues/39382
Fixes: https://github.com/go-gitea/gitea/issues/32364
Fixes: https://github.com/go-gitea/gitea/issues/36077
Fixes: https://github.com/go-gitea/gitea/issues/23277
Fixes: https://github.com/go-gitea/gitea/issues/29020
Co-authored-by: Claude (Opus 5) <noreply@anthropic.com>
Co-authored-by: Zettat123 <zettat123@gmail.com>

modules/actions/workflows_test.go

@@ -13,6 +13,7 @@ import (
 	webhook_module "gitea.dev/modules/webhook"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 func fullWorkflowContent(part string) []byte {
@@ -27,6 +28,25 @@ jobs:
 `)
 }
 
+func TestReadWorkflowEventsStaticErrors(t *testing.T) {
+	for content, static := range map[string]bool{
+		"on: push\njobs: {}":                                                                  true,
+		"on: push\njobs: {test: {needs: absent}}":                                             true,
+		"on: push\njobs: {one: {needs: two}, two: {needs: one}}":                              true,
+		"on: push\njobs: {test: {strategy: {matrix: {os: []}}}}":                              true,
+		"on: push\nrun-name: ${{ secrets.TOKEN }}\njobs: {test: {}}":                          true,
+		"on: push\nrun-name: ${{ fromJSON(inputs.x) }}\njobs: {test: {steps: [{run: echo}]}}": false,
+	} {
+		_, gotStatic, err := readWorkflowEvents([]byte(content))
+		require.Error(t, err, content)
+		assert.Equal(t, static, gotStatic, content)
+	}
+	for _, content := range []string{"on: push\njobs: {test: {steps: [{run: echo}]}}", "on: push\nrun-name: ${{ github.ref }}\njobs: {test: {}}"} {
+		_, _, err := readWorkflowEvents([]byte(content))
+		assert.NoError(t, err, content)
+	}
+}
+
 func TestIsWorkflow(t *testing.T) {
 	defer test.MockVariableValue(&setting.Actions.WorkflowDirs)()