ci: pin actions workflow step hashes and use minimum permissions (#1691)

Author: zimeg

.github/workflows/ci-build.yml

@@ -3,7 +3,8 @@ name: CI Build
 
 on:
   push:
-    branches: [main]
+    branches:
+      - main
   pull_request:
 
 jobs:
@@ -22,13 +23,17 @@ jobs:
           - "3.8"
           - "3.7"
           - "pypy3.10"
+    permissions:
+      contents: read
     env:
       CI_LARGE_SOCKET_MODE_PAYLOAD_TESTING_DISABLED: "1"
       FORCE_COLOR: "1"
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          persist-credentials: false
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
           python-version: ${{ matrix.python-version }}
           cache: pip
@@ -50,15 +55,15 @@ jobs:
           PYTHONPATH=$PWD:$PYTHONPATH pytest tests/slack_sdk/oauth/state_store/test_sqlalchemy.py
       - name: Upload test results to Codecov
         if: ${{ !cancelled() }}
-        uses: codecov/test-results-action@v1
+        uses: codecov/test-results-action@f2dba722c67b86c6caa034178c6e4d35335f6706 # v1.1.0
         with:
           directory: ./reports/
           flags: ${{ matrix.python-version }}
           token: ${{ secrets.CODECOV_TOKEN }}
           verbose: true
       - name: Upload test coverage to Codecov (only with latest supported version)
         if: startsWith(matrix.python-version, '3.13')
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@18283e04ce6e62d37312384ff67231eb8fd56d24 # v5.4.3
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           # Run validation generates the coverage file

.github/workflows/docs-deploy.yml

@@ -17,11 +17,14 @@ jobs:
   build:
     name: Build Docusaurus
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           fetch-depth: 0
-      - uses: actions/setup-node@v4
+          persist-credentials: false
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version: 20
           cache: npm
@@ -36,7 +39,7 @@ jobs:
         working-directory: ./docs
 
       - name: Upload Build Artifact
-        uses: actions/upload-pages-artifact@v3
+        uses: actions/upload-pages-artifact@56afc609e74202658d3ffba0e8f6dda462b719fa # v3.0.1
         with:
           path: ./docs/build
 
@@ -59,4 +62,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v4
+        uses: actions/deploy-pages@d6db90164ac5ed86f2b6aed7e0febac5b3c0c03e # v4.0.5

.github/workflows/mypy.yml

@@ -2,7 +2,8 @@ name: mypy validation
 
 on:
   push:
-    branches: [main]
+    branches:
+      - main
   pull_request:
 
 jobs:
@@ -12,10 +13,14 @@ jobs:
     strategy:
       matrix:
         python-version: ["3.13"]
+    permissions:
+      contents: read
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          persist-credentials: false
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
           python-version: ${{ matrix.python-version }}
       - name: Run mypy verification

.github/workflows/triage-issues.yml

@@ -4,20 +4,19 @@
 
 name: Close stale issues and PRs
 
-on: 
+on:
   workflow_dispatch:
   schedule:
-    - cron: '0 0 * * 1'
-  
-permissions:
-  issues: write
-  pull-requests: write
+    - cron: "0 0 * * 1"
 
 jobs:
   stale:
     runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
     steps:
-      - uses: actions/stale@v9.1.0
+      - uses: actions/stale@5bef64f19d7facfb25b37b414482c7164d639639 # v9.1.0
         with:
           days-before-issue-stale: 30
           days-before-issue-close: 10
@@ -31,4 +30,3 @@ jobs:
           remove-stale-when-updated: true
           enable-statistics: true
           operations-per-run: 60
-