remove save-pr-number

.github/workflows/get-api-diff.yml

@@ -171,16 +171,3 @@ jobs:
         path: api-head.json
     - name: Kill Misskey Job
       run: screen -S misskey -X quit
-
-  save-pr-number:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Save PR number
-        env:
-          PR_NUMBER: ${{ github.event.number }}
-        run: |
-          echo "$PR_NUMBER" > ./pr_number
-      - uses: actions/upload-artifact@v3
-        with:
-          name: api-artifact
-          path: pr_number

.github/workflows/report-api-diff.yml

@@ -39,7 +39,14 @@ jobs:
         run: unzip api-artifact.zip -d artifacts
       - name: Load PR Number
         id: load-pr-num
-        run: echo "pr-number=$(cat artifacts/pr_number)" >> "$GITHUB_OUTPUT"
+        env:
+          PULL_REQUESTS: ${{ toJson(github.event.workflow_run.pull_requests.*) }}
+          REPO_ID: ${{ github.repository_id }}
+        run: |
+          # find first pull requests that targets this repository
+          PR_NUMBER="$(echo "$PULL_REQUESTS" \
+              | jq --arg REPO_ID "$REPO_ID" '[.[] | select ($REPO_ID == (.base.repo.id | tostring)) | .number ][0]')"
+          echo "pr-number=$PR_NUMBER" >> "$GITHUB_OUTPUT"
 
       - name: Output base
         run: cat ./artifacts/api-base.json
@@ -59,7 +66,10 @@ jobs:
         uses: actions/upload-artifact@v3
         with:
           name: api-artifact
-          path: api-full.json.diff
+          path: |
+            api-full.json.diff
+            api-base.json
+            api-head.json
       - id: out-diff
         name: Build diff Comment
         run: |