Add GitHub Actions workflow that renders and commits spec pdfs (#579)

* Add GitHub Actions workflow that renders and commits the spec pdfs

* Try to run make

* Try our custom action

* Add link to Dockerfile to make action happy

* Update render workflow to manual render only

* Update .github/actions/render-protocol-pdf/action.yml

* Update .github/dependabot.yml

.github/actions/render-protocol-pdf/Dockerfile

@@ -0,0 +1 @@
+../../../Dockerfile

.github/actions/render-protocol-pdf/action.yml

@@ -0,0 +1,7 @@
+name: Render Zcash Protocol Specification
+description: GitHub Action to compile Zcash Protocol Specification LaTeX documents
+author: Deirdre Connolly
+runs:
+  using: docker
+  # Runs `make all` or something like it
+  image: Dockerfile

.github/dependabot.yml

@@ -0,0 +1,10 @@
+version: 2
+updates:
+- package-ecosystem: github-actions
+  directory: "/"
+  schedule:
+    interval: daily
+    timezone: America/New_York
+  open-pull-requests-limit: 10
+  labels:
+  - "A-CI"

.github/workflows/render.yml

@@ -0,0 +1,19 @@
+name: Render pdfs
+
+on: workflow_dispatch
+
+jobs:
+
+  render:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Git repository
+        uses: actions/checkout@v2
+
+      - name: Compile Zcash Protocol Specification
+        uses: ./.github/actions/render-protocol-pdf
+
+      - uses: EndBug/add-and-commit@v7.5.0
+        with:
+          add: '**/*.pdf'
+          default_author: github_actions

.gitignore

@@ -29,3 +29,4 @@ protocol/saplinghtml/
 
 protocol/heartwood.pdf
 protocol/protocol.ver
+*~