chore: [StepSecurity] ci: Harden GitHub Actions (open-feature#120)

* [StepSecurity] ci: Harden GitHub Actions in release.yml

* [StepSecurity] ci: Harden GitHub Actions in static-code-scanning.yaml

* [StepSecurity] ci: Harden GitHub Actions in lint-pr.yml

* [StepSecurity] ci: Harden GitHub Actions in merge.yml

* [StepSecurity] ci: Harden GitHub Actions in pullrequest.yml

Author: step-security-bot

Diff for: .github/workflows/lint-pr.yml

@@ -7,11 +7,17 @@ on:
       - edited
       - synchronize
 
+permissions:  # added using https://github.com/step-security/secure-workflows
+  contents: read
+
 jobs:
   main:
+    permissions:
+      pull-requests: read  # for amannn/action-semantic-pull-request to analyze PRs
+      statuses: write  # for amannn/action-semantic-pull-request to mark status of analyzed PR
     name: Validate PR title
     runs-on: ubuntu-latest
     steps:
-      - uses: amannn/action-semantic-pull-request@v4
+      - uses: amannn/action-semantic-pull-request@505e44b4f33b4c801f063838b3f053990ee46ea7
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

Diff for: .github/workflows/merge.yml

@@ -22,9 +22,9 @@ jobs:
       packages: write
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b
     - name: Set up JDK 8
-      uses: actions/setup-java@v3
+      uses: actions/setup-java@a18c333f3f14249953dab3e186e5e21bf3390f1d
       with:
         java-version: '8'
         distribution: 'temurin'
@@ -34,7 +34,7 @@ jobs:
         server-password: ${{ secrets.OSSRH_PASSWORD }}
 
     - name: Cache local Maven repository
-      uses: actions/cache@v3
+      uses: actions/cache@56461b9eb0f8438fd15c7a9968e3c9ebb18ceff1
       with:
         path: ~/.m2/repository
         key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
@@ -51,7 +51,7 @@ jobs:
       run: mvn --batch-mode --update-snapshots verify
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@d9f34f8cd5cb3b3eb79b3e4b5dae3a16df499a70
       with:
         flags: unittests # optional
         name: coverage # optional

Diff for: .github/workflows/pullrequest.yml

@@ -18,22 +18,22 @@ jobs:
       packages: write
     steps:
       - name: Check out the code
-        uses: actions/checkout@v3
+        uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b
 
       - name: Set up JDK 8
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@a18c333f3f14249953dab3e186e5e21bf3390f1d
         with:
           java-version: '8'
           distribution: 'temurin'
           cache: maven
 
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@v2
+        uses: github/codeql-action/init@e0e5ded33cabb451ae0a9768fc7b0410bad9ad44
         with:
           languages: java
 
       - name: Cache local Maven repository
-        uses: actions/cache@v3
+        uses: actions/cache@56461b9eb0f8438fd15c7a9968e3c9ebb18ceff1
         with:
           path: ~/.m2/repository
           key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
@@ -44,12 +44,12 @@ jobs:
         run: mvn --batch-mode --update-snapshots verify # -P integration-test - add this back once we have a compatible flagd
 
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@d9f34f8cd5cb3b3eb79b3e4b5dae3a16df499a70
         with:
           flags: unittests # optional
           name: coverage # optional
           fail_ci_if_error: true # optional (default = false)
           verbose: true # optional (default = false)
 
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@v2
+        uses: github/codeql-action/analyze@e0e5ded33cabb451ae0a9768fc7b0410bad9ad44

Diff for: .github/workflows/release.yml

@@ -7,13 +7,19 @@ on:
     branches:
       - main
 name: Run Release Please
+permissions:  # added using https://github.com/step-security/secure-workflows
+  contents: read
+
 jobs:
   release-please:
+    permissions:
+      contents: write  # for google-github-actions/release-please-action to create release commit
+      pull-requests: write  # for google-github-actions/release-please-action to create release PR
     runs-on: ubuntu-latest
 
     # Release-please creates a PR that tracks all changes
     steps:
-      - uses: google-github-actions/release-please-action@v3
+      - uses: google-github-actions/release-please-action@069d7229d7b10308de85bc606a91e0033e259c8e
         id: release
         with:
           command: manifest
@@ -23,10 +29,10 @@ jobs:
       # These steps are only run if this was a merged release-please PR
       - name: checkout
         if: ${{ steps.release.outputs.releases_created }}
-        uses: actions/checkout@v3
+        uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b
       - name: Set up JDK 8
         if: ${{ steps.release.outputs.releases_created }}
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@a18c333f3f14249953dab3e186e5e21bf3390f1d
         with:
           java-version: '8'
           distribution: 'temurin'

Diff for: .github/workflows/static-code-scanning.yaml

@@ -15,6 +15,9 @@ on:
     #        *  * * * *
     - cron: '30 1 * * 1'
 
+permissions:  # added using https://github.com/step-security/secure-workflows
+  contents: read
+
 jobs:
   CodeQL-Build:
     # CodeQL runs on ubuntu-latest, windows-latest, and macos-latest
@@ -26,16 +29,16 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b
 
       # Initializes the CodeQL tools for scanning.
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@v2
+        uses: github/codeql-action/init@e0e5ded33cabb451ae0a9768fc7b0410bad9ad44
         with:
           languages: java
 
       - name: Autobuild
-        uses: github/codeql-action/autobuild@v2
+        uses: github/codeql-action/autobuild@e0e5ded33cabb451ae0a9768fc7b0410bad9ad44
 
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@v2
+        uses: github/codeql-action/analyze@e0e5ded33cabb451ae0a9768fc7b0410bad9ad44