슬랙 메세지 웹훅 스크립트 추가

notify-slack/action.yml

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+name: Slack 배포 시작 알림
+description: 배포 시작을 Slack으로 전송하는 스크립트
+inputs:
+  webhook-url:
+    required: true
+runs:
+  using: composite
+  steps:
+    - shell: bash
+      env:
+        WEBHOOK_URL: ${{ inputs.webhook-url }}
+        REPO: ${{ gitea.repository }}
+        BRANCH: ${{ gitea.ref_name }}
+        ACTOR: ${{ gitea.actor }}
+        RUN_ID: ${{ gitea.run_id }}
+        SHA: ${{ gitea.sha }}
+      run: |
+        set -eu
+        SHORT_SHA="${SHA:0:7}"
+        STATUS_URL="https://status.gitea.sample.com/${REPO}/actions/runs/${RUN_ID}"
+        COMMIT_MSG="$(git log -1 --pretty=format:%s 2>/dev/null || echo '(no message)')"
+        HEADER_TEXT="🚀 배포 시작 — ${REPO}"
+
+        PAYLOAD=$(jq -n \
+          --arg header "$HEADER_TEXT" \
+          --arg branch "$BRANCH" \
+          --arg sha    "$SHORT_SHA" \
+          --arg actor  "$ACTOR" \
+          --arg msg    "$COMMIT_MSG" \
+          --arg sturl  "$STATUS_URL" \
+          '{
+            text: $header,
+            blocks: [
+              {type:"header", text:{type:"plain_text", text:$header, emoji:true}},
+              {type:"section", fields:[
+                {type:"mrkdwn", text:("*브랜치*\n`" + $branch + "`")},
+                {type:"mrkdwn", text:("*커밋*\n`" + $sha + "` " + $msg)},
+                {type:"mrkdwn", text:("*실행자*\n" + $actor)}
+              ]},
+              {type:"actions", elements:[
+                {type:"button",
+                 text:{type:"plain_text", text:"📊 배포 상태 보기", emoji:true},
+                 url:$sturl,
+                 style:"primary"}
+              ]}
+            ]
+          }')
+
+        echo "$PAYLOAD" | curl -sS --fail-with-body \
+          -X POST \
+          -H 'Content-Type: application/json; charset=utf-8' \
+          --data @- \
+          "$WEBHOOK_URL"