pr-labeler.yml

name: PR Labeler

on:
  pull_request:
    types: [opened, synchronize, edited]

jobs:
  # ==========================================================================
  # Size Label - PR 크기에 따른 라벨 (변경 시 업데이트)
  # ==========================================================================
  size-label:
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write

    steps:
      - name: Label PR by Size
        uses: actions/github-script@v7
        with:
          script: |
            const prNumber = context.payload.pull_request.number;

            const { data: pr } = await github.rest.pulls.get({
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: prNumber
            });

            const totalChanges = pr.additions + pr.deletions;

            console.log(`📊 PR #${prNumber} 변경: +${pr.additions} -${pr.deletions} (총 ${totalChanges} lines)`);

            const sizeLabels = {
              'size/XS': { max: 10, color: '3CBF00' },
              'size/S': { max: 50, color: '5D9801' },
              'size/M': { max: 200, color: 'FBCA04' },
              'size/L': { max: 500, color: 'FFA500' },
              'size/XL': { max: Infinity, color: 'D93F0B' }
            };

            let newSizeLabel = 'size/XL';
            for (const [label, config] of Object.entries(sizeLabels)) {
              if (totalChanges <= config.max) {
                newSizeLabel = label;
                break;
              }
            }

            // 현재 라벨 확인
            const { data: currentLabels } = await github.rest.issues.listLabelsOnIssue({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: prNumber
            });

            const currentSizeLabel = currentLabels.find(l => l.name.startsWith('size/'));

            // 같은 라벨이면 스킵
            if (currentSizeLabel?.name === newSizeLabel) {
              console.log(`✅ 이미 올바른 크기 라벨: ${newSizeLabel}`);
              return;
            }

            // 기존 size 라벨 제거
            if (currentSizeLabel) {
              await github.rest.issues.removeLabel({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: prNumber,
                name: currentSizeLabel.name
              });
            }

            // 라벨이 없으면 생성
            try {
              await github.rest.issues.getLabel({
                owner: context.repo.owner,
                repo: context.repo.repo,
                name: newSizeLabel
              });
            } catch (error) {
              if (error.status === 404) {
                await github.rest.issues.createLabel({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  name: newSizeLabel,
                  color: sizeLabels[newSizeLabel].color,
                  description: `PR size: ${newSizeLabel.replace('size/', '')}`
                });
              }
            }

            // 새 라벨 추가
            await github.rest.issues.addLabels({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: prNumber,
              labels: [newSizeLabel]
            });

            console.log(`✅ 크기 라벨 적용: ${newSizeLabel}`);

  # ==========================================================================
  # Type Label - PR 커밋들에서 타입 추출 (없을 때만 추가)
  # ==========================================================================
  type-label:
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write

    steps:
      - name: Label PR by Commit Types
        uses: actions/github-script@v7
        with:
          script: |
            const prNumber = context.payload.pull_request.number;

            // 지원하는 타입 라벨 정의
            const typeLabels = {
              'feat':     { color: '0E8A16', description: '새로운 기능' },
              'fix':      { color: 'D93F0B', description: '버그 수정' },
              'refactor': { color: '1D76DB', description: '리팩토링' },
              'design':   { color: 'F9D0C4', description: 'UI/디자인 변경' },
              'style':    { color: 'FEF2C0', description: '코드 스타일 변경' },
              'docs':     { color: '0075CA', description: '문서 수정' },
              'test':     { color: 'BFD4F2', description: '테스트 코드' },
              'chore':    { color: 'D4C5F9', description: '기타 변경사항' },
              'init':     { color: '5319E7', description: '초기 생성' },
              'rename':   { color: 'C2E0C6', description: '파일/폴더명 변경' },
              'remove':   { color: 'B60205', description: '파일 삭제' },
              'cicd':     { color: 'FBCA04', description: 'CI/CD 관련' }
            };

            const typeKeys = Object.keys(typeLabels);
            const typePattern = new RegExp(`(?:^|\\s)(${typeKeys.join('|')})(?:\\([^)]*\\))?:`, 'i');

            // PR의 커밋 목록 가져오기
            const { data: commits } = await github.rest.pulls.listCommits({
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: prNumber
            });

            console.log(`📝 PR #${prNumber} 커밋 수: ${commits.length}`);

            // 각 커밋에서 타입 추출 (중복 제거)
            const detectedTypes = new Set();
            for (const commit of commits) {
              const message = commit.commit.message.split('\n')[0]; // 첫 줄만
              const match = message.match(typePattern);
              if (match) {
                detectedTypes.add(match[1].toLowerCase());
              }
              console.log(`   - ${message.substring(0, 60)}${message.length > 60 ? '...' : ''}`);
            }

            console.log(`🔍 감지된 타입: ${[...detectedTypes].join(', ') || '없음'}`);

            if (detectedTypes.size === 0) {
              console.log('⚠️ 커밋에서 타입을 찾을 수 없습니다.');
              return;
            }

            // 현재 라벨 확인
            const { data: currentLabels } = await github.rest.issues.listLabelsOnIssue({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: prNumber
            });

            const currentLabelNames = currentLabels.map(l => l.name);

            // 추가할 타입 라벨 필터링 (이미 있는 것 제외)
            const labelsToAdd = [...detectedTypes].filter(type => !currentLabelNames.includes(type));

            if (labelsToAdd.length === 0) {
              console.log('✅ 모든 타입 라벨이 이미 존재합니다.');
              return;
            }

            // 라벨이 없으면 생성
            for (const type of labelsToAdd) {
              const labelConfig = typeLabels[type];
              try {
                await github.rest.issues.getLabel({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  name: type
                });
              } catch (error) {
                if (error.status === 404) {
                  await github.rest.issues.createLabel({
                    owner: context.repo.owner,
                    repo: context.repo.repo,
                    name: type,
                    color: labelConfig.color,
                    description: labelConfig.description
                  });
                }
              }
            }

            // 타입 라벨 추가
            await github.rest.issues.addLabels({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: prNumber,
              labels: labelsToAdd
            });

            console.log(`✅ 타입 라벨 추가: ${labelsToAdd.join(', ')}`);