Add atomic PR ID job - Callable Workflow

.github/workflows/_get_pr_id.yml

@@ -0,0 +1,37 @@
+---
+name: Get PR ID
+
+on:
+  workflow_call:
+    inputs:
+      commit-sha:
+        type: string
+        required: true
+    outputs:
+      id:
+        description: "ID of PR that was associated to the merge to main that triggered the job"
+        value: ${{ jobs.pr.outputs.id }}
+
+jobs:
+  pr:
+    name: Get PR ID
+    runs-on: ubuntu-22.04
+    outputs:
+      id: ${{ steps.pr.outputs.id }}
+    steps:
+      - name: Get PR ID
+        id: pr
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          commit_message=$(
+            curl -s -L \
+              -H "Accept: application/vnd.github+json" \
+              -H "Authorization: Bearer $GH_TOKEN" \
+              -H "X-GitHub-Api-Version: 2022-11-28" \
+              https://api.github.com/repos/${{ github.repository }}/commits/${{ inputs.commit-sha }} | \
+            jq -r ".commit.message"
+          )
+          ID=$(echo "$commit_message" | head -1 | grep -o "(#.*)" | grep -o "[0-9]*")
+          echo "id=$ID" >> $GITHUB_OUTPUT
+

.github/workflows/test_get_pr_id.yml

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+---
+name: Test - Get PR ID
+
+on:
+  pull_request:
+    branches:
+      - main
+    paths:
+      - .github/workflows/_get_pr_id.yml
+      - .github/workflows/test_get_pr_id.yml
+
+
+jobs:
+  main_commit:
+    uses: .github/workflows/_get_pr_id.yml
+    with:
+      commit-sha: "7d46c75af91adbfdfc70689f4d8b3405b26bda6b"
+
+
+  branch_commit:
+    uses: .github/workflows/_get_pr_id.yml
+    with:
+      commit-sha: "f30be53c2a5b3d61928c0f41a2e25605a9901d6a"
+
+
+  dne_commit:
+    uses: .github/workflows/_get_pr_id.yml
+    with:
+      commit-sha: "f30be53c2a5b3d61928c0f41a2e25605a9901d6b"
+
+
+  test_main_commit:
+    name: Test Get PR ID - Success
+    runs-on: ubuntu-22.04
+    needs:
+      - main_commit
+    steps:
+      - name: Assert
+        env:
+          ID: ${{ needs.main_commit.outputs.id }}
+        run: |
+          if [[ "$ID" != "196" ]]; then
+            exit 1
+          fi
+          exit 0
+
+  test_branch_pr:
+    name: Test Get PR ID - empty for non-main commit
+    runs-on: ubuntu-22.04
+    needs:
+      - branch_commit
+    steps:
+      - name: Assert
+        env:
+          ID: ${{ needs.branch_commit.outputs.id }}
+        run: |
+          if [[ "$ID" != "" ]]; then
+            exit 1
+          fi
+          exit 0
+
+
+  test_dne_commit:
+    name: Test Get PR ID - empty for non-existent commit
+    runs-on: ubuntu-22.04
+    needs:
+      - dne_commit
+    steps:
+      - name: Assert
+        env:
+          ID: ${{ needs.dne_commit.outputs.id }}
+        run: |
+          if [[ "$ID" != "" ]]; then
+            exit 1
+          fi
+          exit 0