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2nd/10_Wiki/Topics/AI_and_ML/ESLint-Static-Analysis.md
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koriweb d8a80f6272 chore(wiki): dangling 링크 canonical 정규화 (768파일/1200건)
이름만 다른(표기 변형) [[위키링크]]를 대상 문서의 canonical 제목으로 치환해
끊겼던 1,200개 링크를 연결. 제목/파일명 정규화 일치만 적용하고 별칭 매칭은
과병합 위험으로 제외(애매성 가드). 원본은 _link_reconcile_backup/ 에 백업.
도구: Datacollect/scripts/link_reconcile_apply.mjs

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-06-08 12:24:15 +09:00

6.4 KiB

id, title, category, status, canonical_id, aliases, duplicate_of, source_trust_level, confidence_score, verification_status, tags, raw_sources, last_reinforced, github_commit, tech_stack
id title category status canonical_id aliases duplicate_of source_trust_level confidence_score verification_status tags raw_sources last_reinforced github_commit tech_stack
wiki-2026-0508-eslint-static-analysis ESLint Static Analysis 10_Wiki/Topics verified self
ESLint
JS linter
static analysis
custom rule
AST
biome
oxlint
none A 1.0 applied
software-engineering
static-analysis
eslint
javascript
typescript
ast
lint
2026-05-10 pending
language framework
JavaScript / TypeScript ESLint 9 / Biome / oxlint

ESLint Static Analysis

매 한 줄

"매 JS / TS 의 AST-based static analysis". 매 syntax + style + bug pattern 의 catch. 매 modern (2024+): 매 flat config + 매 typescript-eslint + 매 fast alternative (Biome, oxlint). 매 custom rule = 매 enforcement.

매 핵심

매 mechanism

  • 매 source → AST (espree / @typescript-eslint/parser).
  • 매 visitor pattern 의 rule traverse.
  • 매 violation 의 fix suggestion (autofix).

매 modern (2024+)

  • Flat config (eslint.config.js): 매 .eslintrc legacy out.
  • typescript-eslint v8: 매 type-aware lint.
  • Biome: 매 Rust-based 25x faster.
  • oxlint: 매 even faster (50-100x).
  • Stylistic plugin: 매 ESLint core 의 style rule 의 spin off.

매 응용

  1. Coding standard: 매 team consistency.
  2. Bug prevention: 매 no-undef, no-shadow.
  3. Performance: 매 react-hooks rules.
  4. Security: 매 eslint-plugin-security.
  5. Custom: 매 team-specific anti-pattern.

매 LLM era

  • AI-assisted rule: 매 LLM 의 rule generate.
  • Hybrid: 매 ESLint + Corgea / Snyk.
  • Auto-fix: 매 LLM 의 complex pattern.

💻 패턴

Flat config

// eslint.config.js
import js from '@eslint/js';
import tseslint from 'typescript-eslint';
import stylistic from '@stylistic/eslint-plugin';

export default tseslint.config(
  js.configs.recommended,
  ...tseslint.configs.recommendedTypeChecked,
  {
    languageOptions: {
      parserOptions: { project: './tsconfig.json' },
    },
    plugins: { '@stylistic': stylistic },
    rules: {
      '@stylistic/semi': ['error', 'always'],
      '@typescript-eslint/no-floating-promises': 'error',
      'no-console': ['warn', { allow: ['warn', 'error'] }],
    },
  },
);

Custom rule (no console.log)

// .eslint-rules/no-console-log.js
export default {
  meta: {
    type: 'problem',
    docs: { description: 'Disallow console.log (use logger)' },
    fixable: 'code',
    schema: [],
  },
  create(context) {
    return {
      'CallExpression[callee.object.name="console"][callee.property.name="log"]'(node) {
        context.report({
          node,
          message: 'Use logger.info instead of console.log',
          fix(fixer) {
            return fixer.replaceText(node.callee, 'logger.info');
          },
        });
      },
    };
  },
};

Custom — forbid hardcoded URL

export default {
  meta: { type: 'problem' },
  create(context) {
    return {
      Literal(node) {
        if (typeof node.value === 'string' && /^https:\/\/internal\./.test(node.value)) {
          context.report({ node, message: 'Use env var for internal URL' });
        }
      },
    };
  },
};

Type-aware rule (no-floating-promise)

// 매 typescript-eslint 의 type info 의 use
import { ESLintUtils } from '@typescript-eslint/utils';

export const noUnsafePromise = ESLintUtils.RuleCreator(name => name)({
  name: 'no-unsafe-promise',
  meta: { type: 'problem', docs: { description: '...' }, schema: [], messages: { msg: '...' } },
  defaultOptions: [],
  create(context) {
    const services = ESLintUtils.getParserServices(context);
    const checker = services.program.getTypeChecker();
    return {
      AwaitExpression(node) {
        const type = checker.getTypeAtLocation(services.esTreeNodeToTSNodeMap.get(node.argument));
        // 매 type-based logic
      },
    };
  },
});

CI integration (GitHub Actions)

- run: npx eslint . --max-warnings 0 --format json -o eslint.json
- uses: ataylorme/eslint-annotate-action@v3
  with: { report-json: eslint.json }

Pre-commit (lint-staged)

{
  "lint-staged": {
    "*.{ts,tsx}": ["eslint --fix", "prettier --write"]
  }
}

Migrate to Biome (faster)

// biome.json
{
  "$schema": "https://biomejs.dev/schemas/1.9.0/schema.json",
  "linter": {
    "enabled": true,
    "rules": { "recommended": true, "complexity": { "noForEach": "error" } }
  },
  "formatter": { "enabled": true, "indentWidth": 2 }
}
// 매 npx @biomejs/biome lint .

oxlint (Rust, fastest)

npx oxlint@latest . --deny correctness --deny perf
# 매 50-100x faster than ESLint

Disable inline (justified)

// eslint-disable-next-line @typescript-eslint/no-explicit-any -- 매 third-party type 의 incomplete
const data = response as any;

LLM-generated rule

def llm_generate_rule(description):
    prompt = f"""Generate an ESLint custom rule.

Description: {description}

Output JS module with meta + create."""
    return llm.generate(prompt)

매 결정 기준

상황 Tool
Standard JS/TS ESLint flat config
Speed-critical CI Biome / oxlint
Type-aware typescript-eslint
Custom team rule ESLint custom rule
Format only Prettier / Biome
Security + eslint-plugin-security / Snyk Code

기본값: 매 ESLint flat + 매 typescript-eslint + 매 Biome (format) + 매 lint-staged + 매 CI annotate.

🔗 Graph

🤖 LLM 활용

언제: 매 codebase standard. 매 team scale. 매 anti-pattern enforce. 언제 X: 매 prototype throwaway.

안티패턴

  • Disable everything: 매 lint 의 useless.
  • Old .eslintrc legacy (post-2024): 매 flat config 의 migrate.
  • No type-aware in TS: 매 false confidence.
  • Lint at PR only: 매 friction → 매 pre-commit.
  • No autofix: 매 manual fatigue.

🧪 검증 / 중복

  • Verified (ESLint v9 docs, typescript-eslint, Biome).
  • 신뢰도 A.

🕓 Changelog

날짜 변경
2026-04-20 Auto-reinforced
2026-05-08 Phase 1
2026-05-10 Manual cleanup — flat config + custom rule + Biome / oxlint + CI / pre-commit code