Update workflows to use composite actions

.github/actions/install-examples/action.yml

@@ -0,0 +1,12 @@
+name: install-examples
+
+runs:
+  using: composite
+  steps:
+    - name: Install Melting Pot
+      uses: ./.github/actions/install-meltingpot
+    - name: Install requirements for examples
+      shell: bash
+      run: |
+        pip -vvv -r examples/requirements.txt
+        pip list

.github/actions/install-meltingpot/action.yml

@@ -0,0 +1,19 @@
+name: install-meltingpot
+
+inputs:
+  python-version:
+    description: Python version
+    required: false
+    default: '3.10'
+    type: string
+
+runs:
+  using: composite
+  steps:
+    - name: Install Python dependencies
+      shell: bash
+      run: |
+        pip install --upgrade pip
+        pip install setuptools
+        pip -vvv install .[dev]
+        pip list

.github/workflows/pylint-examples.yml

@@ -0,0 +1,43 @@
+name: pylint-examples
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - '.github/actions/install-examples.yml'
+      - '.github/actions/install-meltingpot.yml'
+      - '.github/workflows/pylint-examples.yml'
+      - '.pylintrc'
+      - 'examples/**'
+      - 'meltingpot/**'
+  pull_request:
+    branches:
+      - main
+    paths:
+      - '.github/actions/install-examples.yml'
+      - '.github/actions/install-meltingpot.yml'
+      - '.github/workflows/pylint-examples.yml'
+      - '.pylintrc'
+      - 'examples/**'
+      - 'meltingpot/**'
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
+  cancel-in-progress: true
+
+permissions: read-all
+
+jobs:
+  pylint:
+    name: Lint Melting Pot
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - name: Checkout Melting Pot
+        uses: actions/checkout@8f4b7f84864484a7bf31766abe9204da3cbe65b3
+      - name: Install examples
+        uses: ./.github/actions/install-examples
+      - name: Run PyLint on examples
+        run: pylint --errors-only examples

.github/workflows/pylint-meltingpot.yml

@@ -0,0 +1,41 @@
+name: pylint-meltingpot
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - '.github/actions/install-meltingpot.yml'
+      - '.github/workflows/pylint-meltingpot.yml'
+      - '.pylintrc'
+      - 'examples/**'
+      - 'meltingpot/**'
+  pull_request:
+    branches:
+      - main
+    paths:
+      - '.github/actions/install-meltingpot.yml'
+      - '.github/workflows/pylint-meltingpot.yml'
+      - '.pylintrc'
+      - 'examples/**'
+      - 'meltingpot/**'
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
+  cancel-in-progress: true
+
+permissions: read-all
+
+jobs:
+  pylint:
+    name: Lint Melting Pot
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - name: Checkout Melting Pot
+        uses: actions/checkout@8f4b7f84864484a7bf31766abe9204da3cbe65b3
+      - name: Install Melting Pot
+        uses: ./.github/actions/install-meltingpot
+      - name: Run PyLint on Melting Pot
+        run: pylint --errors-only meltingpot

.github/workflows/pytype-examples.yml

@@ -0,0 +1,43 @@
+name: pytype-examples
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - '.github/actions/install-examples.yml'
+      - '.github/actions/install-meltingpot.yml'
+      - '.github/workflows/pytype-examples.yml'
+      - 'examples/**'
+      - 'meltingpot/**'
+      - 'pyproject.toml'
+  pull_request:
+    branches:
+      - main
+    paths:
+      - '.github/actions/install-examples.yml'
+      - '.github/actions/install-meltingpot.yml'
+      - '.github/workflows/pytype-examples.yml'
+      - 'examples/**'
+      - 'meltingpot/**'
+      - 'pyproject.toml'
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
+  cancel-in-progress: true
+
+permissions: read-all
+
+jobs:
+  pytype:
+    name: Typecheck Melting Pot
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - name: Checkout Melting Pot
+        uses: actions/checkout@8f4b7f84864484a7bf31766abe9204da3cbe65b3
+      - name: Install examples
+        uses: ./.github/actions/install-examples
+      - name: Run PyType on examples
+        run: pytype examples

.github/workflows/pytype-meltingpot.yml

@@ -0,0 +1,41 @@
+name: pytype-meltingpot
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - '.github/actions/install-meltingpot.yml'
+      - '.github/workflows/pytype-meltingpot.yml'
+      - 'examples/**'
+      - 'meltingpot/**'
+      - 'pyproject.toml'
+  pull_request:
+    branches:
+      - main
+    paths:
+      - '.github/actions/install-meltingpot.yml'
+      - '.github/workflows/pytype-meltingpot.yml'
+      - 'examples/**'
+      - 'meltingpot/**'
+      - 'pyproject.toml'
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
+  cancel-in-progress: true
+
+permissions: read-all
+
+jobs:
+  pytype:
+    name: Typecheck Melting Pot
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - name: Checkout Melting Pot
+        uses: actions/checkout@8f4b7f84864484a7bf31766abe9204da3cbe65b3
+      - name: Install Melting Pot
+        uses: ./.github/actions/install-meltingpot
+      - name: Run PyType on Melting Pot
+        run: pytype meltingpot

.github/workflows/test-examples.yml

@@ -1,24 +1,28 @@
-# Continuous integration tests.
-
 name: test-examples
 
 on:
   push:
     branches:
       - main
     paths:
+      - '.github/actions/install-examples.yml'
+      - '.github/actions/install-meltingpot.yml'
       - '.github/workflows/test-examples.yml'
       - 'examples/**'
       - 'meltingpot/**'
       - 'setup.py'
+      - 'pyproject.toml'
   pull_request:
     branches:
       - main
     paths:
+      - '.github/actions/install-examples.yml'
+      - '.github/actions/install-meltingpot.yml'
       - '.github/workflows/test-examples.yml'
       - 'examples/**'
       - 'meltingpot/**'
       - 'setup.py'
+      - 'pyproject.toml'
   workflow_dispatch:
 
 concurrency:
@@ -31,27 +35,11 @@ jobs:
   test-examples:
     name: Test examples
     runs-on: ubuntu-latest
-    env:
-      SYSTEM_VERSION_COMPAT: 0  # See https://github.com/actions/setup-python/issues/279.
     timeout-minutes: 90
     steps:
       - name: Checkout Melting Pot
-        uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9
-      - name: Set up Python
-        uses: actions/setup-python@61a6322f88396a6271a6ee3565807d608ecaddd1
-        with:
-          python-version: '3.10'
-      - name: Install Python dependencies
-        run: |
-          pip install --upgrade pip
-          pip install setuptools pytest-xdist
-      - name: Install Melting Pot
-        run: |
-          pip -vvv install .
-          pip list
+        uses: actions/checkout@8f4b7f84864484a7bf31766abe9204da3cbe65b3
       - name: Install examples
-        run: |
-          pip install -r examples/requirements.txt
-          pip list
+        uses: ./.github/actions/install-examples
       - name: Test examples
         run: pytest examples