CI: use hashes for actions

Author: lucascolley

.github/workflows/cd.yml

@@ -14,11 +14,11 @@ jobs:
   dist:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           fetch-depth: 0
 
-      - uses: hynek/build-and-inspect-python-package@v2
+      - uses: hynek/build-and-inspect-python-package@b5076c307dc91924a82ad150cdd1533b444d3310 # v2.12.0
 
   publish:
     needs: [dist]
@@ -31,14 +31,14 @@ jobs:
     if: github.event_name == 'release' && github.event.action == 'published'
 
     steps:
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@b14cf4c92620c250e1c074ab0a5800e37df86765 # v4.2.0
         with:
           name: Packages
           path: dist
 
       - name: Generate artifact attestation for sdist and wheel
-        uses: actions/attest-build-provenance@v2.2.3
+        uses: actions/attest-build-provenance@c074443f1aee8d4aeeae555aebba3282517141b2 # v2.2.3
         with:
           subject-path: "dist/*"
 
-      - uses: pypa/gh-action-pypi-publish@release/v1
+      - uses: pypa/gh-action-pypi-publish@76f52bc884231f62b9a034ebfe128415bbaabdfc # v1.12.4

.github/workflows/ci.yml

@@ -21,16 +21,16 @@ jobs:
     name: Format
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           fetch-depth: 0
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0
         with:
           python-version: "3.x"
-      - uses: pre-commit/action@v3.0.1
+      - uses: pre-commit/action@2c7b3805fd2a0fd8c1884dcaebf91fc102a13ecd # v3.0.1
         with:
           extra_args: --hook-stage manual --all-files
-      - uses: prefix-dev/setup-pixi@v0.8.3
+      - uses: prefix-dev/setup-pixi@92815284c57faa15cd896c4d5cfb2d59f32dc43d # v0.8.3
         with:
           pixi-version: v0.42.1
           cache: true
@@ -52,11 +52,11 @@ jobs:
         runs-on: [ubuntu-latest]
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           fetch-depth: 0
 
-      - uses: prefix-dev/setup-pixi@v0.8.3
+      - uses: prefix-dev/setup-pixi@92815284c57faa15cd896c4d5cfb2d59f32dc43d # v0.8.3
         with:
           pixi-version: v0.42.1
           cache: true
@@ -66,6 +66,6 @@ jobs:
         run: pixi run -e ${{ matrix.environment }} tests-ci
 
       - name: Upload coverage report
-        uses: codecov/codecov-action@v5.4.0
+        uses: codecov/codecov-action@0565863a31f2c772f9f0395002a31e3f06189574 # v5.4.0
         with:
           token: ${{ secrets.CODECOV_TOKEN }}

.github/workflows/dependabot-auto-merge.yml

@@ -13,7 +13,7 @@ jobs:
     steps:
       - name: Dependabot metadata
         id: metadata
-        uses: dependabot/fetch-metadata@v2
+        uses: dependabot/fetch-metadata@d7267f607e9d3fb96fc2fbe83e0af444713e90b7 # v2.3.0
         with:
           github-token: "${{ secrets.GITHUB_TOKEN }}"
       - name: Enable auto-merge for Dependabot PRs

.github/workflows/docs-build.yml

@@ -6,7 +6,7 @@ jobs:
   docs-build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - uses: prefix-dev/setup-pixi@v0.8.3
         with:
           pixi-version: v0.42.1
@@ -15,7 +15,7 @@ jobs:
       - name: Build Docs
         run: pixi run -e docs docs
       - name: Upload Artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4.6.1
         with:
           name: docs-build
           path: docs/build/

.github/workflows/docs-deploy.yml

@@ -14,9 +14,9 @@ jobs:
     environment:
       name: docs-deploy
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Download Artifact
-        uses: dawidd6/action-download-artifact@v9
+        uses: dawidd6/action-download-artifact@07ab29fd4a977ae4d2b275087cf67563dfdf0295 # v9
         with:
           workflow: docs-build.yml
           name: docs-build
@@ -26,7 +26,7 @@ jobs:
       # See
       # https://github.com/JamesIves/github-pages-deploy-action/tree/dev#using-an-ssh-deploy-key-
       - name: Deploy
-        uses: JamesIves/github-pages-deploy-action@v4
+        uses: JamesIves/github-pages-deploy-action@6c2d9db40f9296374acc17b90404b6e8864128c8 # v4.7.3
         with:
           folder: docs/build/
           ssh-key: ${{ secrets.DEPLOY_KEY }}