From 9cd784cdee670054d642e646eccbc7a043055180 Mon Sep 17 00:00:00 2001
From: Kisaragi <48310258+KisaragiEffective@users.noreply.github.com>
Date: Sat, 21 Sep 2024 18:19:09 +0900
Subject: ci: api.jsonの差分がない時は折りたたみを生成しないようにする (#14598)
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---
 .github/workflows/report-api-diff.yml | 33 +++++++++++++++++++++------------
 1 file changed, 21 insertions(+), 12 deletions(-)

(limited to '.github')

diff --git a/.github/workflows/report-api-diff.yml b/.github/workflows/report-api-diff.yml
index df9cc279e8..9fd1e28f01 100644
--- a/.github/workflows/report-api-diff.yml
+++ b/.github/workflows/report-api-diff.yml
@@ -70,18 +70,27 @@ jobs:
       - id: out-diff
         name: Build diff Comment
         run: |
-          cat <<- EOF > ./output.md
-          このPRによるapi.jsonの差分
-          <details>
-          <summary>差分はこちら</summary>
-
-          \`\`\`diff
-          $(cat ./api.json.diff)
-          \`\`\`
-          </details>
-
-          [Get diff files from Workflow Page](https://github.com/${GITHUB_REPOSITORY}/actions/runs/${GITHUB_RUN_ID})
-          EOF
+          HEADER="このPRによるapi.jsonの差分"
+          FOOTER="[Get diff files from Workflow Page](https://github.com/${GITHUB_REPOSITORY}/actions/runs/${GITHUB_RUN_ID})"
+          DIFF_BYTES="$(stat ./api.json.diff -c '%s' | tr -d '\n')"
+          
+          echo "$HEADER" > ./output.md
+          
+          if (( "$DIFF_BYTES" <= 1 )); then
+            echo '差分はありません。' >> ./output.md
+          else
+            cat <<- EOF >> ./output.md
+            <details>
+            <summary>差分はこちら</summary>
+            
+            \`\`\`diff
+            $(cat ./api.json.diff)
+            \`\`\`
+            </details>
+            EOF
+          fi
+          
+          echo "$FOOTER" >> ./output.md
       - uses: thollander/actions-comment-pull-request@v2
         with:
           pr_number: ${{ steps.load-pr-num.outputs.pr-number }}
-- 
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