feat: Validate GitHub Actions schema (#2416)

* feat: Validate GitHub Actions schema

**BREAKING** previously accepted workflows are now invalid

* update code

* fix tests

* Bump docker / fix lint

* fix test action due to moving the file

* remove unused function

* fix parsing additional functions

* fix allow int

* update docker dep, due to linter

(cherry picked from commit 64219df0f2155d75ffc4423dc93c1e80bb4740bc)

Conflicts:
	go.mod
	go.sum
	pkg/model/workflow.go

	trivial context conflict & go.mod upgrades

act/runner/testdata/local-action-via-composite-dockerfile/action/action.yml

@@ -1,44 +1,44 @@
-inputs:
-  who-to-greet:
-    default: 'Mona the Octocat'
-runs:
-  using: composite
-  steps:
-  # Test if GITHUB_ACTION_PATH is set correctly before all steps
-  - run: stat $GITHUB_ACTION_PATH/push.yml
-    shell: bash
-  - run: stat $GITHUB_ACTION_PATH/action.yml
-    shell: bash
-  - run: '[[ "$GITHUB_ACTION_REPOSITORY" == "" ]] && [[ "$GITHUB_ACTION_REF" == "" ]]'
-    shell: bash
-  - uses: ./actions/docker-local
-    id: dockerlocal
-    with:
-      who-to-greet: ${{inputs.who-to-greet}}
-  - run: '[[ "${{ env.SOMEVAR }}" == "${{inputs.who-to-greet}}" ]]'
-    shell: bash
-  - run: '[ "${SOMEVAR}" = "Not Mona" ] || exit 1'
-    shell: bash
-    env:
-      SOMEVAR: 'Not Mona'
-  - run: '[[ "${{ steps.dockerlocal.outputs.whoami }}" == "${{inputs.who-to-greet}}" ]]'
-    shell: bash
-  # Test if overriding args doesn't leak inputs
-  - uses: ./actions/docker-local-noargs
-    with:
-      args: ${{format('"{0}"', 'Mona is not the Octocat') }}
-      who-to-greet: ${{inputs.who-to-greet}}
-  - run: '[[ "${{ env.SOMEVAR }}" == "Mona is not the Octocat" ]]'
-    shell: bash
-  - uses: ./localdockerimagetest_
-  # Also test a remote docker action here
-  - uses: actions/hello-world-docker-action@v1
-    with:
-      who-to-greet: 'Mona the Octocat'
-  # Test if GITHUB_ACTION_PATH is set correctly after all steps
-  - run: stat $GITHUB_ACTION_PATH/push.yml
-    shell: bash
-  - run: stat $GITHUB_ACTION_PATH/action.yml
-    shell: bash
-  - run: '[[ "$GITHUB_ACTION_REPOSITORY" == "" ]] && [[ "$GITHUB_ACTION_REF" == "" ]]'
-    shell: bash
+inputs:
+  who-to-greet:
+    default: 'Mona the Octocat'
+runs:
+  using: composite
+  steps:
+  # Test if GITHUB_ACTION_PATH is set correctly before all steps
+  - run: stat $GITHUB_ACTION_PATH/../push.yml
+    shell: bash
+  - run: stat $GITHUB_ACTION_PATH/action.yml
+    shell: bash
+  - run: '[[ "$GITHUB_ACTION_REPOSITORY" == "" ]] && [[ "$GITHUB_ACTION_REF" == "" ]]'
+    shell: bash
+  - uses: ./actions/docker-local
+    id: dockerlocal
+    with:
+      who-to-greet: ${{inputs.who-to-greet}}
+  - run: '[[ "${{ env.SOMEVAR }}" == "${{inputs.who-to-greet}}" ]]'
+    shell: bash
+  - run: '[ "${SOMEVAR}" = "Not Mona" ] || exit 1'
+    shell: bash
+    env:
+      SOMEVAR: 'Not Mona'
+  - run: '[[ "${{ steps.dockerlocal.outputs.whoami }}" == "${{inputs.who-to-greet}}" ]]'
+    shell: bash
+  # Test if overriding args doesn't leak inputs
+  - uses: ./actions/docker-local-noargs
+    with:
+      args: ${{format('"{0}"', 'Mona is not the Octocat') }}
+      who-to-greet: ${{inputs.who-to-greet}}
+  - run: '[[ "${{ env.SOMEVAR }}" == "Mona is not the Octocat" ]]'
+    shell: bash
+  - uses: ./localdockerimagetest_
+  # Also test a remote docker action here
+  - uses: actions/hello-world-docker-action@v1
+    with:
+      who-to-greet: 'Mona the Octocat'
+  # Test if GITHUB_ACTION_PATH is set correctly after all steps
+  - run: stat $GITHUB_ACTION_PATH/../push.yml
+    shell: bash
+  - run: stat $GITHUB_ACTION_PATH/action.yml
+    shell: bash
+  - run: '[[ "$GITHUB_ACTION_REPOSITORY" == "" ]] && [[ "$GITHUB_ACTION_REF" == "" ]]'
+    shell: bash

act/runner/testdata/local-action-via-composite-dockerfile/push.yml

@@ -6,4 +6,4 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
-    - uses: ./local-action-via-composite-dockerfile
+    - uses: ./local-action-via-composite-dockerfile/action