diff --git a/.editorconfig b/.editorconfig
index e291365..9d08a1a 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -3,7 +3,7 @@ root = true
 [*]
 charset = utf-8
 indent_style = space
-indent_size = 4
+indent_size = 2
 end_of_line = lf
 insert_final_newline = true
 trim_trailing_whitespace = true
diff --git a/.eslintrc.js b/.eslintrc.js
new file mode 100644
index 0000000..b8d07e3
--- /dev/null
+++ b/.eslintrc.js
@@ -0,0 +1,19 @@
+// http://eslint.org/docs/user-guide/configuring
+
+module.exports = {
+    root: true,
+    env: {
+      'node': true
+    },
+    // https://github.com/standard/standard/blob/master/docs/RULES-en.md
+    extends: 'standard',
+    // add your custom rules here
+    'rules': {
+      // allow paren-less arrow functions
+      'arrow-parens': 0,
+      // allow async-await
+      'generator-star-spacing': 0,
+      // allow debugger during development
+      'no-debugger': process.env.NODE_ENV === 'production' ? 2 : 0
+    }
+  }
diff --git a/package.json b/package.json
index 7a32d12..8c533c9 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,10 @@
   "version": "0.0.1",
   "main": "src/app.js",
   "scripts": {
-    "start": "NODE_ENV=development node src/app"
+    "start": "NODE_ENV=development node src/app",
+    "lint": "eslint src/**/* --quiet",
+    "precommit": "npm run lint",
+    "commitmsg": "validate-commit-msg"
   },
   "repository": {
     "type": "git",
@@ -27,12 +30,9 @@
     "string-template": "^1.0.0"
   },
   "engines": {
-    "node": ">= 4"
+    "node": ">= 7.8.0"
   },
   "config": {
-    "ghooks": {
-      "commit-msg": "validate-commit-msg"
-    },
     "validate-commit-msg": {
       "types": [
         "feat",
@@ -53,10 +53,20 @@
       }
     }
   },
-  "os": ["darwin", "linux"],
+  "os": [
+    "darwin",
+    "linux"
+  ],
   "devDependencies": {
-    "ghooks": "^2.0.0",
+    "eslint": "^4.9.0",
+    "eslint-config-standard": "^10.2.1",
+    "eslint-friendly-formatter": "^3.0.0",
+    "eslint-plugin-import": "^2.7.0",
+    "eslint-plugin-node": "^5.2.0",
+    "eslint-plugin-promise": "^3.6.0",
+    "eslint-plugin-standard": "^3.0.1",
     "git-pull-or-clone": "xuexb/git-pull-or-clone",
+    "husky": "^0.14.3",
     "validate-commit-msg": "^2.14.0"
   }
 }
diff --git a/src/app.js b/src/app.js
index 5cbfe84..6957cd6 100755
--- a/src/app.js
+++ b/src/app.js
@@ -3,52 +3,50 @@
  * @author xuexb <fe.xiaowu@gmail.com>
  */
 
-require('dotenv').config();
+require('dotenv').config()
 
-const EventEmitter = require('events');
-const Koa = require('koa');
-const bodyParser = require('koa-bodyparser');
-const requireDir = require('require-dir');
-const {verifySignature} = require('./utils');
-const issueActions = requireDir('./modules/issues');
-const pullRequestActions = requireDir('./modules/pull_request');
-const releasesActions = requireDir('./modules/releases');
-const app = new Koa();
-const githubEvent = new EventEmitter();
+const EventEmitter = require('events')
+const Koa = require('koa')
+const bodyParser = require('koa-bodyparser')
+const requireDir = require('require-dir')
+const { verifySignature } = require('./utils')
+const issueActions = requireDir('./modules/issues')
+const pullRequestActions = requireDir('./modules/pull_request')
+const releasesActions = requireDir('./modules/releases')
+const app = new Koa()
+const githubEvent = new EventEmitter()
 
-app.use(bodyParser());
+app.use(bodyParser())
 
 app.use(ctx => {
-    let eventName = ctx.request.headers['x-github-event'];
-    if (eventName && verifySignature(ctx.request)) {
-        const payload = ctx.request.body;
-        const action = payload.action || payload.ref_type;
+  let eventName = ctx.request.headers['x-github-event']
+  if (eventName && verifySignature(ctx.request)) {
+    const payload = ctx.request.body
+    const action = payload.action || payload.ref_type
 
-        if (action) {
-            eventName += `_${action}`;
-        }
-
-        console.log(`receive event: ${eventName}`);
+    if (action) {
+      eventName += `_${action}`
+    }
 
-        githubEvent.emit(eventName, {
-            repo: payload.repository.name,
-            payload
-        });
+    console.log(`receive event: ${eventName}`)
 
-        ctx.body = 'Ok.';
-    }
-    else {
-        ctx.body = 'Go away.';
-    }
-});
+    githubEvent.emit(eventName, {
+      repo: payload.repository.name,
+      payload
+    })
 
+    ctx.body = 'Ok.'
+  } else {
+    ctx.body = 'Go away.'
+  }
+})
 
-const actions = Object.assign({}, issueActions, pullRequestActions, releasesActions);
+const actions = Object.assign({}, issueActions, pullRequestActions, releasesActions)
 Object.keys(actions).forEach((key) => {
-    actions[key](githubEvent.on.bind(githubEvent));
-    console.log(`bind ${key} success!`);
-});
+  actions[key](githubEvent.on.bind(githubEvent))
+  console.log(`bind ${key} success!`)
+})
 
-const port = 8000;
-app.listen(port);
-console.log(`Listening on http://0.0.0.0:${port}`);
+const port = 8000
+app.listen(port)
+console.log(`Listening on http://0.0.0.0:${port}`)
diff --git a/src/github.js b/src/github.js
index 16ad0bc..40a8b88 100755
--- a/src/github.js
+++ b/src/github.js
@@ -3,293 +3,378 @@
  * @author xuexb <fe.xiaowu@gmail.com>
  */
 
-const GitHub = require('github');
-const {toArray} = require('./utils');
+const GitHub = require('github')
+const { toArray } = require('./utils')
 
 const github = new GitHub({
-    debug: process.env.NODE_ENV === 'development'
-});
+  debug: process.env.NODE_ENV === 'development'
+})
 
 github.authenticate({
-    type: 'token',
-    token: process.env.GITHUB_TOKEN
-});
+  type: 'token',
+  token: process.env.GITHUB_TOKEN
+})
 
 module.exports = {
 
-    github,
+  github,
 
-    /**
-     * issue 是否包含某 label
-     *
-     * @param {Object} payload data
-     * @param {string} body 评论内容
-     */
-    issueHasLabel(payload, label) {
-        const owner = payload.repository.owner.login;
-        const repo = payload.repository.name;
-        const number = payload.issue.number;
+  /**
+   * issue 是否包含某 label
+   *
+   * @param {Object} payload data
+   * @param {string} body 评论内容
+   */
+  async issueHasLabel (payload, label) {
+    const owner = payload.repository.owner.login
+    const repo = payload.repository.name
+    const number = payload.issue.number
 
-        return new Promise((resolve, reject) => {
-            github.issues.getIssueLabels({
-                owner,
-                repo,
-                number
-            }).then(res => {
-                if (res.data.map(v => v.name).indexOf(label) > -1) {
-                    resolve();
-                }
-                else {
-                    reject();
-                }
-            }, reject);
-        });
-    },
+    try {
+      const res = github.issues.getIssueLabels({
+        owner,
+        repo,
+        number
+      })
 
-    /**
-     * PR 是否包含某 label
-     *
-     * @param {Object} payload data
-     * @param {string} body 评论内容
-     */
-    pullRequestHasLabel(payload, label) {
-        const owner = payload.repository.owner.login;
-        const repo = payload.repository.name;
-        const number = payload.pull_request.number;
+      if (res.data.map(v => v.name).indexOf(label) === -1) {
+        Promise.reject(new Error('issue no label'))
+      }
+    } catch (e) {
+      Promise.reject(e)
+    }
+  },
 
-        return new Promise((resolve, reject) => {
-            github.issues.getIssueLabels({
-                owner,
-                repo,
-                number
-            }).then(res => {
-                if (res.data.map(v => v.name).indexOf(label) > -1) {
-                    resolve();
-                }
-                else {
-                    reject();
-                }
-            }, reject);
-        });
-    },
+  /**
+   * PR 是否包含某 label
+   *
+   * @param {Object} payload data
+   * @param {string} body 评论内容
+   */
+  async pullRequestHasLabel (payload, label) {
+    const owner = payload.repository.owner.login
+    const repo = payload.repository.name
+    const number = payload.pull_request.number
 
-    /**
-     * 评论 issue
-     *
-     * @param {Object} payload data
-     * @param {string} body 评论内容
-     */
-    commentIssue(payload, body) {
-        const owner = payload.repository.owner.login;
-        const repo = payload.repository.name;
-        const number = payload.issue.number;
+    try {
+      const res = await github.issues.getIssueLabels({
+        owner,
+        repo,
+        number
+      })
+      if (res.data.map(v => v.name).indexOf(label) === -1) {
+        Promise.reject(new Error('pull request no label'))
+      }
+    } catch (e) {
+      Promise.reject(e)
+    }
+  },
 
-        github.issues.createComment({
-            owner,
-            repo,
-            number,
-            body
-        });
-    },
+  /**
+   * 评论 issue
+   *
+   * @param {Object} payload data
+   * @param {string} body 评论内容
+   */
+  async commentIssue (payload, body) {
+    const owner = payload.repository.owner.login
+    const repo = payload.repository.name
+    const number = payload.issue.number
 
-    /**
-     * 评论 PR
-     *
-     * @param {Object} payload data
-     * @param {string} body 评论内容
-     */
-    commentPullRequest(payload, body) {
-        const owner = payload.repository.owner.login;
-        const repo = payload.repository.name;
-        const number = payload.pull_request.number;
+    try {
+      const res = await github.issues.createComment({
+        owner,
+        repo,
+        number,
+        body
+      })
+      return res
+    } catch (e) {
+      Promise.reject(e)
+    }
+  },
 
-        github.issues.createComment({
-            owner,
-            repo,
-            number,
-            body
-        });
-    },
+  /**
+   * 评论 PR
+   *
+   * @param {Object} payload data
+   * @param {string} body 评论内容
+   */
+  async commentPullRequest (payload, body) {
+    const owner = payload.repository.owner.login
+    const repo = payload.repository.name
+    const number = payload.pull_request.number
 
-    /**
-     * 关闭 issue
-     *
-     * @param {Object} payload data
-     */
-    closeIssue(payload) {
-        const owner = payload.repository.owner.login;
-        const repo = payload.repository.name;
-        const number = payload.issue.number;
+    try {
+      const res = await github.issues.createComment({
+        owner,
+        repo,
+        number,
+        body
+      })
+      return res
+    } catch (e) {
+      Promise.reject(e)
+    }
+  },
 
-        github.issues.edit({
-            owner,
-            repo,
-            number,
-            state: 'closed'
-        });
-    },
+  /**
+   * 关闭 issue
+   *
+   * @param {Object} payload data
+   */
+  async closeIssue (payload) {
+    const owner = payload.repository.owner.login
+    const repo = payload.repository.name
+    const number = payload.issue.number
 
-    /**
-     * 分派作者到 issues
-     *
-     * @param {Object} payload data
-     * @param {string | Array} assign  用户id
-     */
-    addAssigneesToIssue(payload, assign) {
-        const owner = payload.repository.owner.login;
-        const repo = payload.repository.name;
-        const number = payload.issue.number;
+    try {
+      const res = await github.issues.edit({
+        owner,
+        repo,
+        number,
+        state: 'closed'
+      })
+      return res
+    } catch (e) {
+      Promise.reject(e)
+    }
+  },
 
-        github.issues.edit({
-            owner,
-            repo,
-            number,
-            assignees: Array.isArray(assign) ? assign : [assign]
-        });
-    },
+  /**
+   * 分派作者到 issues
+   *
+   * @param {Object} payload data
+   * @param {string | Array} assign  用户id
+   */
+  async addAssigneesToIssue (payload, assign) {
+    const owner = payload.repository.owner.login
+    const repo = payload.repository.name
+    const number = payload.issue.number
 
-    /**
-     * 添加标签到 issue
-     *
-     * @param {Object} payload data
-     * @param {string | Array} labels  标签
-     */
-    addLabelsToIssue(payload, labels) {
-        const owner = payload.repository.owner.login;
-        const repo = payload.repository.name;
-        const number = payload.issue.number;
+    try {
+      const res = await github.issues.edit({
+        owner,
+        repo,
+        number,
+        assignees: Array.isArray(assign) ? assign : [assign]
+      })
+      return res
+    } catch (e) {
+      Promise.reject(e)
+    }
+  },
 
-        github.issues.addLabels({
-            owner,
-            repo,
-            number,
-            labels: Array.isArray(labels) ? labels : [labels]
-        });
-    },
+  /**
+   * 添加标签到 issue
+   *
+   * @param {Object} payload data
+   * @param {string | Array} labels  标签
+   */
+  async addLabelsToIssue (payload, labels) {
+    const owner = payload.repository.owner.login
+    const repo = payload.repository.name
+    const number = payload.issue.number
 
-    /**
-     * 添加标签到 PR
-     *
-     * @param {Object} payload data
-     * @param {string | Array} labels  标签
-     */
-    addLabelsToPullRequest(payload, labels) {
-        const owner = payload.repository.owner.login;
-        const repo = payload.repository.name;
-        const number = payload.pull_request.number;
+    try {
+      const res = await github.issues.addLabels({
+        owner,
+        repo,
+        number,
+        labels: Array.isArray(labels) ? labels : [labels]
+      })
+      return res
+    } catch (e) {
+      Promise.reject(e)
+    }
+  },
 
-        github.issues.addLabels({
-            owner,
-            repo,
-            number,
-            labels: Array.isArray(labels) ? labels : [labels]
-        });
-    },
+  /**
+   * 添加标签到 PR
+   *
+   * @param {Object} payload data
+   * @param {string | Array} labels  标签
+   */
+  async addLabelsToPullRequest (payload, labels) {
+    const owner = payload.repository.owner.login
+    const repo = payload.repository.name
+    const number = payload.pull_request.number
 
-    /**
-     * 删除 PR 标签
-     *
-     * @param {Object} payload data
-     * @param {string} name  标签名
-     */
-    removeLabelsToPullRequest(payload, name) {
-        const owner = payload.repository.owner.login;
-        const repo = payload.repository.name;
-        const number = payload.pull_request.number;
+    try {
+      const res = await github.issues.addLabels({
+        owner,
+        repo,
+        number,
+        labels: Array.isArray(labels) ? labels : [labels]
+      })
+      return res
+    } catch (e) {
+      Promise.reject(e)
+    }
+  },
 
-        github.issues.removeLabel({
-            owner,
-            repo,
-            number,
-            name
-        });
-    },
+  /**
+   * 删除 PR 标签
+   *
+   * @param {Object} payload data
+   * @param {string} name  标签名
+   */
+  async removeLabelsToPullRequest (payload, name) {
+    const owner = payload.repository.owner.login
+    const repo = payload.repository.name
+    const number = payload.pull_request.number
 
-    /**
-     * 删除 issue 标签
-     *
-     * @param {Object} payload data
-     * @param {string} name  标签名
-     */
-    removeLabelsToIssue(payload, name) {
-        const owner = payload.repository.owner.login;
-        const repo = payload.repository.name;
-        const number = payload.issues.number;
+    try {
+      const res = await Fgithub.issues.removeLabel({
+        owner,
+        repo,
+        number,
+        name
+      })
+      return res
+    } catch (e) {
+      Promise.reject(e)
+    }
+  },
 
-        github.issues.removeLabel({
-            owner,
-            repo,
-            number,
-            name
-        });
-    },
+  /**
+   * 删除 issue 标签
+   *
+   * @param {Object} payload data
+   * @param {string} name  标签名
+   */
+  async removeLabelsToIssue (payload, name) {
+    const owner = payload.repository.owner.login
+    const repo = payload.repository.name
+    const number = payload.issues.number
+    try {
+      const res = await github.issues.removeLabel({
+        owner,
+        repo,
+        number,
+        name
+      })
+      return res
+    } catch (e) {
+      Promise.reject(e)
+    }
+  },
 
-    /**
-     * 创建发布
-     *
-     * @param  {Object} payload                  data
-     * @param  {string} options.tag_name         tag名
-     * @param  {string} options.target_commitish tag hash
-     * @param  {string} options.name             标题
-     * @param  {string} options.body             内容
-     * @param  {boolean} options.draft            是否为草稿
-     * @param  {boolean} options.prerelease       是否预发布
-     */
-    createRelease(payload, {tag_name, target_commitish, name, body, draft, prerelease}) {
-        const owner = payload.repository.owner.login;
-        const repo = payload.repository.name;
+  /**
+   * 创建发布
+   *
+   * @param  {Object} payload                  data
+   * @param  {string} options.tag_name         tag名
+   * @param  {string} options.target_commitish tag hash
+   * @param  {string} options.name             标题
+   * @param  {string} options.body             内容
+   * @param  {boolean} options.draft            是否为草稿
+   * @param  {boolean} options.prerelease       是否预发布
+   */
+  async createRelease (payload, { tag_name, target_commitish, name, body, draft, prerelease }) {
+    const owner = payload.repository.owner.login
+    const repo = payload.repository.name
+    try {
+      const res = await github.repos.createRelease({
+        owner,
+        repo,
+        tag_name,
+        target_commitish,
+        name,
+        body,
+        draft,
+        prerelease
+      })
+      return res
+    } catch (e) {
+      Promise.reject(e)
+    }
+  },
 
-        github.repos.createRelease({
-            owner,
-            repo,
-            tag_name,
-            target_commitish,
-            name,
-            body,
-            draft,
-            prerelease
-        });
-    },
+  /**
+   * 根据tag获取发布信息
+   *
+   * @param  {Object} payload          data
+   * @param  {string} options.tag_name tag名
+   *
+   * @return {Promise}
+   */
+  async getReleaseByTag (payload, { tag_name }) {
+    const owner = payload.repository.owner.login
+    const repo = payload.repository.name
+    try {
+      const res = await github.repos.getReleaseByTag({
+        owner,
+        repo,
+        tag: tag_name
+      })
+      return res
+    } catch (e) {
+      return false
+    }
+  },
 
-    /**
-     * 根据tag获取发布信息
-     *
-     * @param  {Object} payload          data
-     * @param  {string} options.tag_name tag名
-     *
-     * @return {Promise}
-     */
-    getReleaseByTag(payload, {tag_name}) {
-        const owner = payload.repository.owner.login;
-        const repo = payload.repository.name;
+  /**
+   * 创建 review 请求
+   *
+   * @param  {Object} payload                             data
+   * @param  {Array | string} options.reviewers           reviewer
+   * @param  {Array | string} options.team_reviewers      team_reviewers
+   *
+   * @return {Promise}
+   */
+  async createReviewRequest (payload, { reviewers, team_reviewers }) {
+    const owner = payload.repository.owner.login
+    const repo = payload.repository.name
+    const number = payload.pull_request.number
+    try {
+      const res = await github.pullRequests.createReviewRequest({
+        owner,
+        repo,
+        number,
+        reviewers: toArray(reviewers),
+        team_reviewers: toArray(team_reviewers)
+      })
+      return res
+    } catch (e) {
+      Promise.reject(e)
+    }
+  },
 
-        return github.repos.getReleaseByTag({
-            owner,
-            repo,
-            tag: tag_name
-        });
-    },
+  /**
+   * 获得 repo 所有的tag
+   *
+   * @param {any} payload             data
+   * @returns
+   */
+  async getTags (payload) {
+    const owner = payload.repository.owner.login
+    const repo = payload.repository.name
 
-    /**
-     * 创建 review 请求
-     *
-     * @param  {Object} payload                             data
-     * @param  {Array | string} options.reviewers           reviewer
-     * @param  {Array | string} options.team_reviewers      team_reviewers
-     *
-     * @return {Promise}
-     */
-    createReviewRequest(payload, {reviewers, team_reviewers}) {
-        const owner = payload.repository.owner.login;
-        const repo = payload.repository.name;
-        const number = payload.pull_request.number;
+    try {
+      const res = await github.repos.getTags({
+        owner,
+        repo
+      })
+      return res.data
+    } catch (e) {
+      Promise.reject(e)
+    }
+  },
 
-        return github.pullRequests.createReviewRequest({
-            owner,
-            repo,
-            number,
-            reviewers: toArray(reviewers),
-            team_reviewers: toArray(team_reviewers)
-        });
-    },
-};
+  async compareCommits (payload, { base, head }) {
+    const owner = payload.repository.owner.login
+    const repo = payload.repository.name
+    try {
+      const res = await github.repos.compareCommits({
+        owner,
+        repo,
+        base,
+        head
+      })
+      return res.data
+    } catch (e) {
+      Promise.reject(e)
+    }
+  }
+}
diff --git a/src/modules/issues/autoAssign.js b/src/modules/issues/autoAssign.js
index ab14901..c2c7b37 100755
--- a/src/modules/issues/autoAssign.js
+++ b/src/modules/issues/autoAssign.js
@@ -3,21 +3,21 @@
  * @author xuexb <fe.xiaowu@gmail.com>
  */
 
-const {getPkgConfig} = require('../../utils');
-const {addAssigneesToIssue} = require('../../github');
+const { getPkgConfig } = require('../../utils')
+const { addAssigneesToIssue } = require('../../github')
 
-const config = getPkgConfig();
-const assignMap = config.labelToAuthor || {};
+const config = getPkgConfig()
+const assignMap = config.labelToAuthor || {}
 
-function autoAssign(on) {
-    on('issues_labeled', ({payload, repo}) => {
-        if (assignMap[payload.label.name]) {
-            addAssigneesToIssue(
-                payload,
-                assignMap[payload.label.name]
-            );
-        }
-    });
+function autoAssign (on) {
+  on('issues_labeled', ({ payload, repo }) => {
+    if (assignMap[payload.label.name]) {
+      addAssigneesToIssue(
+        payload,
+        assignMap[payload.label.name]
+      )
+    }
+  })
 }
 
-module.exports = autoAssign;
+module.exports = autoAssign
diff --git a/src/modules/issues/replyInvalid.js b/src/modules/issues/replyInvalid.js
index 7dcfeaf..bbfaa82 100755
--- a/src/modules/issues/replyInvalid.js
+++ b/src/modules/issues/replyInvalid.js
@@ -3,39 +3,39 @@
  * @author xuexb <fe.xiaowu@gmail.com>
  */
 
-const format = require('string-template');
+const format = require('string-template')
 const {
-    commentIssue,
-    closeIssue,
-    addLabelsToIssue
-} = require('../../github');
+  commentIssue,
+  closeIssue,
+  addLabelsToIssue
+} = require('../../github')
 
 const comment = [
-    'hi @{user}，非常感谢您的反馈，',
-    '但是由于您没有使用 [规范的issue](https://github.com/xuexb/github-bot#issue-规则) 格式， 将直接被关闭， 谢谢！'
-].join('');
+  'hi @{user}，非常感谢您的反馈，',
+  '但是由于您没有使用 [规范的issue](https://github.com/xuexb/github-bot#issue-规则) 格式， 将直接被关闭， 谢谢！'
+].join('')
 
 const match = str => {
-    return /node version:\s*[vV]?(\d\.?)+/.test(str);
-};
+  return /node version:\s*[vV]?(\d\.?)+/.test(str)
+}
 
-function replyInvalid(on) {
-    on('issues_opened', ({payload}) => {
-        const issue = payload.issue;
-        const opener = issue.user.login;
+function replyInvalid (on) {
+  on('issues_opened', ({ payload }) => {
+    const issue = payload.issue
+    const opener = issue.user.login
 
-        if (!match(issue.body)) {
-            commentIssue(
-                payload,
-                format(comment, {
-                    user: opener
-                })
-            );
+    if (!match(issue.body)) {
+      commentIssue(
+        payload,
+        format(comment, {
+          user: opener
+        })
+      )
 
-            closeIssue(payload);
-            addLabelsToIssue(payload, 'invalid');
-        }
-    });
+      closeIssue(payload)
+      addLabelsToIssue(payload, 'invalid')
+    }
+  })
 }
 
-module.exports = replyInvalid;
+module.exports = replyInvalid
diff --git a/src/modules/issues/replyNeedDemo.js b/src/modules/issues/replyNeedDemo.js
index 1506bc0..25b428a 100755
--- a/src/modules/issues/replyNeedDemo.js
+++ b/src/modules/issues/replyNeedDemo.js
@@ -3,23 +3,22 @@
  * @author xuexb <fe.xiaowu@gmail.com>
  */
 
-const format = require('string-template');
-const {commentIssue} = require('../../github');
+const format = require('string-template')
+const { commentIssue } = require('../../github')
 
-const comment = 'hi @{user}，请提供一个可预览的链接，如： <https://codepen.io/pen?template=KgPZrE&editors=0010>';
+const comment = 'hi @{user}，请提供一个可预览的链接，如： <https://codepen.io/pen?template=KgPZrE&editors=0010>'
 
-function replyNeedDemo(on) {
-    on('issues_labeled', ({payload, repo}) => {
-        if (payload.label.name === 'need demo') {
-            commentIssue(
-                payload,
-                format(comment, {
-                    user: payload.issue.user.login
-                })
-            );
-        }
-
-    });
+function replyNeedDemo (on) {
+  on('issues_labeled', ({ payload, repo }) => {
+    if (payload.label.name === 'need demo') {
+      commentIssue(
+        payload,
+        format(comment, {
+          user: payload.issue.user.login
+        })
+      )
+    }
+  })
 }
 
-module.exports = replyNeedDemo;
+module.exports = replyNeedDemo
diff --git a/src/modules/pull_request/autoReviewRequest.js b/src/modules/pull_request/autoReviewRequest.js
index 8f39e50..8133d5e 100644
--- a/src/modules/pull_request/autoReviewRequest.js
+++ b/src/modules/pull_request/autoReviewRequest.js
@@ -3,21 +3,21 @@
  * @author xuexb <fe.xiaowu@gmail.com>
  */
 
-const {getPkgConfig} = require('../../utils');
-const {createReviewRequest} = require('../../github');
+const { getPkgConfig } = require('../../utils')
+const { createReviewRequest } = require('../../github')
 
-const config = getPkgConfig();
-const assignMap = config.labelToAuthor || {};
+const config = getPkgConfig()
+const assignMap = config.labelToAuthor || {}
 
 module.exports = on => {
-    on('pull_request_labeled', ({payload, repo}) => {
-        if (assignMap[payload.label.name]) {
-            createReviewRequest(
-                payload,
-                {
-                    reviewers: assignMap[payload.label.name]
-                }
-            );
+  on('pull_request_labeled', ({ payload, repo }) => {
+    if (assignMap[payload.label.name]) {
+      createReviewRequest(
+        payload,
+        {
+          reviewers: assignMap[payload.label.name]
         }
-    });
+      )
+    }
+  })
 }
diff --git a/src/modules/pull_request/replyInvalidTitle.js b/src/modules/pull_request/replyInvalidTitle.js
index 59405f8..1e01e1d 100644
--- a/src/modules/pull_request/replyInvalidTitle.js
+++ b/src/modules/pull_request/replyInvalidTitle.js
@@ -3,59 +3,57 @@
  * @author xuexb <fe.xiaowu@gmail.com>
  */
 
-const format = require('string-template');
-const {getPkgCommitPrefix} = require('../../utils');
+const format = require('string-template')
+const { getPkgCommitPrefix } = require('../../utils')
 const {
-    commentPullRequest,
-    addLabelsToPullRequest,
-    removeLabelsToPullRequest,
-    pullRequestHasLabel
-} = require('../../github');
+  commentPullRequest,
+  addLabelsToPullRequest,
+  removeLabelsToPullRequest,
+  pullRequestHasLabel
+} = require('../../github')
 
-const actions = getPkgCommitPrefix();
+const actions = getPkgCommitPrefix()
 const match = title => {
-    return actions.some(action => title.indexOf(`${action}:`) === 0);
-};
+  return actions.some(action => title.indexOf(`${action}:`) === 0)
+}
 
 const commentSuccess = [
-    'hi @{user}，非常感谢您及时修正标题格式，祝您玩的开心！'
-].join('');
+  'hi @{user}，非常感谢您及时修正标题格式，祝您玩的开心！'
+].join('')
 
 const commentError = [
-    'hi @{user}，非常感谢您的 PR ，',
-    '但是您没有使用 [PR 标题规则](https://github.com/xuexb/github-bot#commit-log-和-pr-标题规则) 格式，',
-    '请及时修改， 谢谢！'
-].join('');
+  'hi @{user}，非常感谢您的 PR ，',
+  '但是您没有使用 [PR 标题规则](https://github.com/xuexb/github-bot#commit-log-和-pr-标题规则) 格式，',
+  '请及时修改， 谢谢！'
+].join('')
 
 module.exports = on => {
-    if (actions.length) {
-        on('pull_request_opened', ({payload, repo}) => {
-            if (!match(payload.pull_request.title)) {
-                commentPullRequest(
-                    payload,
-                    format(commentError, {
-                        user: payload.pull_request.user.login
-                    })
-                );
-
-                addLabelsToPullRequest(payload, 'invalid');
-            }
-        });
-
-        on('pull_request_edited', ({payload, repo}) => {
-            if (match(payload.pull_request.title)) {
-                pullRequestHasLabel(payload, 'invalid').then(() => {
-                    commentPullRequest(
-                        payload,
-                        format(commentSuccess, {
-                            user: payload.pull_request.user.login
-                        })
-                    );
-
-                    removeLabelsToPullRequest(payload, 'invalid');
-                });
-            }
-        });
-    }
-
-};
+  if (actions.length) {
+    on('pull_request_opened', ({ payload, repo }) => {
+      if (!match(payload.pull_request.title)) {
+        commentPullRequest(
+          payload,
+          format(commentError, {
+            user: payload.pull_request.user.login
+          })
+        )
+
+        addLabelsToPullRequest(payload, 'invalid')
+      }
+    })
+
+    on('pull_request_edited', async ({ payload, repo }) => {
+      if (match(payload.pull_request.title)) {
+        await pullRequestHasLabel(payload, 'invalid')
+        commentPullRequest(
+          payload,
+          format(commentSuccess, {
+            user: payload.pull_request.user.login
+          })
+        )
+
+        removeLabelsToPullRequest(payload, 'invalid')
+      }
+    })
+  }
+}
diff --git a/src/modules/pull_request/titlePrefixToLabel.js b/src/modules/pull_request/titlePrefixToLabel.js
index d498adb..57d7c09 100644
--- a/src/modules/pull_request/titlePrefixToLabel.js
+++ b/src/modules/pull_request/titlePrefixToLabel.js
@@ -4,31 +4,31 @@
  */
 
 const {
-    addLabelsToPullRequest,
-    pullRequestHasLabel
-} = require('../../github');
+  addLabelsToPullRequest,
+  pullRequestHasLabel
+} = require('../../github')
 
 const getAction = title => {
-    return (title.match(/^(\w+?):/) || [])[1];
-};
+  return (title.match(/^(\w+?):/) || [])[1]
+}
 
 const ACTION_TO_LABEL_MAP = {
-    feat: 'enhancement',
-    fix: 'bug',
-    docs: 'document'
-};
+  feat: 'enhancement',
+  fix: 'bug',
+  docs: 'document'
+}
 
-const handle = ({payload, repo}) => {
-    const action = getAction(payload.pull_request.title);
+const handle = ({ payload, repo }) => {
+  const action = getAction(payload.pull_request.title)
 
-    if (action && ACTION_TO_LABEL_MAP[action]) {
-        pullRequestHasLabel(payload, ACTION_TO_LABEL_MAP[action]).catch(() => {
-            addLabelsToPullRequest(payload, ACTION_TO_LABEL_MAP[action]);
-        });
-    }
-};
+  if (action && ACTION_TO_LABEL_MAP[action]) {
+    pullRequestHasLabel(payload, ACTION_TO_LABEL_MAP[action]).catch(() => {
+      addLabelsToPullRequest(payload, ACTION_TO_LABEL_MAP[action])
+    })
+  }
+}
 
 module.exports = on => {
-    on('pull_request_edited', handle);
-    on('pull_request_opened', handle);
-};
+  on('pull_request_edited', handle)
+  on('pull_request_opened', handle)
+}
diff --git a/src/modules/releases/autoReleaseNote.js b/src/modules/releases/autoReleaseNote.js
index bdb10e8..c6b44d5 100644
--- a/src/modules/releases/autoReleaseNote.js
+++ b/src/modules/releases/autoReleaseNote.js
@@ -3,79 +3,92 @@
  * @author xuexb <fe.xiaowu@gmail.com>
  */
 
-const {getReleaseByTag, createRelease} = require('../../github');
-const {updateRepo, getTags, getFirstCommitHash, getCommitLog} = require('../../utils');
+const { getTags, compareCommits, getReleaseByTag, createRelease } = require('../../github')
 
 const RELEASE_CHANGE_MAP = {
-    document: 'docs',
-    feature: 'feat',
-    bugfix: 'fix',
-    close: 'close'
-};
+  document: 'docs',
+  feature: 'feat',
+  bugfix: 'fix',
+  close: 'close'
+}
 
 module.exports = on => {
-    on('create_tag', ({payload, repo}) => {
-        getReleaseByTag(payload, {
-            tag_name: payload.ref
-        }).then(() => {}, () => {
-            updateRepo({
-                url: payload.repository.clone_url,
-                repo
-            }).then(repoDir => {
-                const tags = getTags({
-                    dir: repoDir
-                });
-                const after = tags[0];
-                const before = tags.length > 1 ? tags[1] : getFirstCommitHash({
-                    dir: repoDir
-                });
-                const log = getCommitLog({
-                    dir: repoDir,
-                    before,
-                    after
-                });
+  on('create_tag', async ({ payload, repo }) => {
+    const tag = await getReleaseByTag(payload, {
+      tag_name: payload.ref
+    })
+    // 如果该 tag 存在则直接返回
+    if (tag !== false) {
+      return
+    }
+
+    // 创建 release note
+    try {
+      const tags = await getTags(payload)
+      const head = tags[0].name
+      const base = tags.length > 1 ? tags[1].name : tags[0].name
+
+      const commitsLog = await compareCommits(payload, {
+        base,
+        head
+      })
 
-                const hash = getCommitLog({
-                    dir: repoDir,
-                    before,
-                    after,
-                    html_url: payload.repository.html_url,
-                    hash: true
-                });
+      const commits = commitsLog.commits
+      const changes = Object.keys(RELEASE_CHANGE_MAP).map(title => {
+        let data = []
+        commits.map((commit) => {
+          if (commit.commit.message.indexOf(`${RELEASE_CHANGE_MAP[title]}:`) === 0) {
+            let message = commit.commit.message
+            // 处理 squash merge 的 commit message
+            // 后期看看有没有更好的解决办法？
+            if (message.indexOf('\n') !== -1) {
+              message = message.substr(0, message.indexOf('\n'))
+            }
+            data.push(`- ${message}, by @${commit.commit.author.name} <<${commit.commit.author.email}>>`)
+          }
+        })
+        return {
+          title,
+          data
+        }
+      }).filter(v => v.data.length)
 
-                const changes = Object.keys(RELEASE_CHANGE_MAP).map(title => {
-                    return {
-                        title,
-                        data: log.filter(log => log.indexOf(`- ${RELEASE_CHANGE_MAP[title]}:`) === 0)
-                    }
-                }).filter(v => v.data.length);
+      const hashChanges = commits.map((commit) => {
+        let message = commit.commit.message
+        // 处理 squash merge 的 commit message
+        if (message.indexOf('\n') !== -1) {
+          message = message.substr(0, message.indexOf('\n'))
+        }
+        return `- [${commit.sha.substr(0, 7)}](${commit.html_url}) - ${message}, by @${commit.commit.author.name} <<${commit.commit.author.email}>>`
+      })
 
-                let body = [];
+      let body = []
 
-                if (changes.length) {
-                    body.push('## Notable changes\n');
-                    changes.forEach(v => {
-                        body.push([
-                            `- ${v.title}`
-                        ]);
+      if (changes.length) {
+        body.push('## Notable changes\n')
+        changes.forEach(v => {
+          body.push([
+            `- ${v.title}`
+          ])
 
-                        v.data.forEach(line => body.push('    ' + line));
-                    });
-                }
+          v.data.forEach(line => body.push('     ' + line))
+        })
+      }
 
-                if (hash.length) {
-                    body.push('\n## Commits\n');
-                    body = body.concat(hash);
-                }
+      if (hashChanges.length) {
+        body.push('\n## Commits\n')
+        body = body.concat(hashChanges)
+      }
 
-                if (body.length) {
-                    createRelease(payload, {
-                        tag_name: payload.ref,
-                        name: `${payload.ref} @${payload.repository.owner.login}`,
-                        body: body.join('\n')
-                    });
-                }
-            }).catch(err => console.error(err));
-        });
-    });
+      if (body.length) {
+        createRelease(payload, {
+          tag_name: payload.ref,
+          name: `${payload.ref} @${payload.repository.owner.login}`,
+          body: body.join('\n')
+        })
+      }
+    } catch (err) {
+      console.error(err)
+    }
+  })
 }
diff --git a/src/utils.js b/src/utils.js
index 6ea42a7..c1f7afd 100755
--- a/src/utils.js
+++ b/src/utils.js
@@ -3,168 +3,167 @@
  * @author xuexb <fe.xiaowu@gmail.com>
  */
 
-const format = require('string-template');
-const path = require('path');
-const fs = require('fs');
-const crypto = require('crypto');
-const {fixedTimeComparison} = require('cryptiles');
-const {execSync, exec} = require('child_process');
-const gitPullOrClone = require('git-pull-or-clone');
+const format = require('string-template')
+const path = require('path')
+const fs = require('fs')
+const crypto = require('crypto')
+const { fixedTimeComparison } = require('cryptiles')
+const { execSync } = require('child_process')
+const gitPullOrClone = require('git-pull-or-clone')
 
 const utils = {
 
-    /**
-     * 验证请求
-     *
-     * @param  {Object} request req
-     *
-     * @return {boolean}
-     */
-    verifySignature(request) {
-        let signature = crypto.createHmac('sha1', process.env.GITHUB_SECRET_TOKEN)
-            .update(request.rawBody)
-            .digest('hex');
-        signature = `sha1=${signature}`;
-        return fixedTimeComparison(signature, request.headers['x-hub-signature']);
-    },
-
-    /**
-     * 目录是否存在
-     *
-     * @param  {string}  file 路径
-     *
-     * @return {boolean}
-     */
-    isDirectory(file) {
-        try {
-            return fs.statSync(file).isDirectory();
-        }
-        catch (e) {
-            if (e.code !== 'ENOENT') {
-                throw e;
-            }
-
-            return false;
-        }
-    },
-
-    /**
-     * 获取本地 git 目录的第一个提交，主要处理当第一次给项目打标签时不能用2个标签去 ..
-     *
-     * @param {string} options.dir git 目录
-     *
-     * @return {string}
-     */
-    getFirstCommitHash({dir}) {
-        return execSync(`cd ${dir} && git log --oneline --pretty=format:"%h"`).toString()
-            .split(/\n+/).slice(-1)[0];
-    },
-
-    /**
-     * 获取本地 git 目录的日志
-     *
-     * @param  {Object} options 配置数据
-     * @param {string} options.dir git 目录
-     * @param {string} options.before 开始版本号
-     * @param {string} options.after 结束版本号
-     * @param {string} options.html_url 预览的html地址， 用来拼 hash commit
-     * @param {boolean} [options.hash=false] 是否携带 commit hash log
-     *
-     * @return {Array}
-     */
-    getCommitLog(options) {
-        const shell = [
-            'cd {dir}',
-            options.hash
-                ? 'git log {before}..{after} --no-merges --pretty=format:"- [%h]({html_url}/commit/%H) - %s, by @%aN <<%ae>>"'
-                : 'git log {before}..{after} --no-merges --pretty=format:"- %s, by @%aN <<%ae>>"'
-        ].join(' && ');
-
-        return execSync(format(shell, options)).toString().split(/\n+/);
-    },
-
-    /**
-     * 更新 github 项目
-     *
-     * @param  {string} options.repo 项目名
-     *
-     * @return {Promise}
-     */
-    updateRepo({url, repo}) {
-        const repoDir = path.resolve(__dirname, '../github/', repo);
-
-        return new Promise((resolve, reject) => {
-            gitPullOrClone(url, repoDir, err => {
-                if (err) {
-                    return reject(err);
-                }
-
-                resolve(repoDir);
-            });
-        });
-    },
-
-    /**
-     * 获取本地 git 目录的 tag 列表
-     *
-     * @param  {Object} options 配置
-     * @param {string} options.dir git 目录
-     *
-     * @return {Array}
-     */
-    getTags(options) {
-        const shell = [
-            'cd {dir}',
-            'git describe --tags `git rev-list --tags --abbrev=0` --abbrev=0 | uniq'
-        ].join(' && ');
-
-        return execSync(format(shell, options)).toString().split(/\n+/).filter(tag => !!tag);
-    },
-
-    /**
-     * 获取 package.json 里的 config.github-bot
-     *
-     * @return {Object}
-     */
-    getPkgConfig() {
-        const pkg = require('../package.json');
-        const config = Object.assign({
-            'github-bot': {}
-        }, pkg.config);
-
-        return config['github-bot'];
-    },
-
-    /**
-     * 获取 commit log 前缀白名单
-     *
-     * @return {Array}
-     */
-    getPkgCommitPrefix() {
-        const pkg = require('../package.json');
-        const config = Object.assign({
-            'validate-commit-msg': {
-                'types': []
-            }
-        }, pkg.config);
-
-        return config['validate-commit-msg'].types;
-    },
-
-    /**
-     * 转化成 Array
-     *
-     * @param  {string | Array} str 目标值
-     *
-     * @return {Array}
-     */
-    toArray(str) {
-        if (str) {
-            return Array.isArray(str) ? str : [str];
+  /**
+   * 验证请求
+   *
+   * @param  {Object} request req
+   *
+   * @return {boolean}
+   */
+  verifySignature (request) {
+    let signature = crypto.createHmac('sha1', process.env.GITHUB_SECRET_TOKEN)
+      .update(request.rawBody)
+      .digest('hex')
+    signature = `sha1=${signature}`
+    return fixedTimeComparison(signature, request.headers['x-hub-signature'])
+  },
+
+  /**
+   * 目录是否存在
+   *
+   * @param  {string}  file 路径
+   *
+   * @return {boolean}
+   */
+  isDirectory (file) {
+    try {
+      return fs.statSync(file).isDirectory()
+    } catch (e) {
+      if (e.code !== 'ENOENT') {
+        throw e
+      }
+
+      return false
+    }
+  },
+
+  /**
+   * 获取本地 git 目录的第一个提交，主要处理当第一次给项目打标签时不能用2个标签去 ..
+   *
+   * @param {string} options.dir git 目录
+   *
+   * @return {string}
+   */
+  getFirstCommitHash ({ dir }) {
+    return execSync(`cd ${dir} && git log --oneline --pretty=format:"%h"`).toString()
+      .split(/\n+/).slice(-1)[0]
+  },
+
+  /**
+   * 获取本地 git 目录的日志
+   *
+   * @param  {Object} options 配置数据
+   * @param {string} options.dir git 目录
+   * @param {string} options.before 开始版本号
+   * @param {string} options.after 结束版本号
+   * @param {string} options.html_url 预览的html地址， 用来拼 hash commit
+   * @param {boolean} [options.hash=false] 是否携带 commit hash log
+   *
+   * @return {Array}
+   */
+  getCommitLog (options) {
+    const shell = [
+      'cd {dir}',
+      options.hash
+        ? 'git log {before}..{after} --no-merges --pretty=format:"- [%h]({html_url}/commit/%H) - %s, by @%aN <<%ae>>"'
+        : 'git log {before}..{after} --no-merges --pretty=format:"- %s, by @%aN <<%ae>>"'
+    ].join(' && ')
+
+    return execSync(format(shell, options)).toString().split(/\n+/)
+  },
+
+  /**
+   * 更新 github 项目
+   *
+   * @param  {string} options.repo 项目名
+   *
+   * @return {Promise}
+   */
+  updateRepo ({ url, repo }) {
+    const repoDir = path.resolve(__dirname, '../github/', repo)
+
+    return new Promise((resolve, reject) => {
+      gitPullOrClone(url, repoDir, err => {
+        if (err) {
+          return reject(err)
         }
 
-        return str;
+        resolve(repoDir)
+      })
+    })
+  },
+
+  /**
+   * 获取本地 git 目录的 tag 列表
+   *
+   * @param  {Object} options 配置
+   * @param {string} options.dir git 目录
+   *
+   * @return {Array}
+   */
+  getTags (options) {
+    const shell = [
+      'cd {dir}',
+      'git describe --tags `git rev-list --tags --abbrev=0` --abbrev=0 | uniq'
+    ].join(' && ')
+
+    return execSync(format(shell, options)).toString().split(/\n+/).filter(tag => !!tag)
+  },
+
+  /**
+   * 获取 package.json 里的 config.github-bot
+   *
+   * @return {Object}
+   */
+  getPkgConfig () {
+    const pkg = require('../package.json')
+    const config = Object.assign({
+      'github-bot': {}
+    }, pkg.config)
+
+    return config['github-bot']
+  },
+
+  /**
+   * 获取 commit log 前缀白名单
+   *
+   * @return {Array}
+   */
+  getPkgCommitPrefix () {
+    const pkg = require('../package.json')
+    const config = Object.assign({
+      'validate-commit-msg': {
+        'types': []
+      }
+    }, pkg.config)
+
+    return config['validate-commit-msg'].types
+  },
+
+  /**
+   * 转化成 Array
+   *
+   * @param  {string | Array} str 目标值
+   *
+   * @return {Array}
+   */
+  toArray (str) {
+    if (str) {
+      return Array.isArray(str) ? str : [str]
     }
-};
 
-module.exports = utils;
+    return str
+  }
+}
+
+module.exports = utils