First commit

.gitignore

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+node_modules
+npm-debug.log
+lib

.npmignore

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+src
+test

.travis.yml

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+language: node_js
+node_js:
+  - "4.1"
+  - "4.0"
+  - "0.12"
+  - "0.11"
+  - "0.10"
+  - "iojs"
+script:
+  - npm run lint
+  - npm run test

LICENSE

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+Creative Commons Legal Code
+
+CC0 1.0 Universal
+
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+express Statement of Purpose.
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+4. Limitations and Disclaimers.
+
+ a. No trademark or patent rights held by Affirmer are waived, abandoned,
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+    party to this document and has no duty or obligation with respect to
+    this CC0 or use of the Work.

README.md

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+auto-changelog
+==============
+
+Command line tool for generating a changelog from git tags and commit history
+
+[![Build Status](https://travis-ci.org/CookPete/auto-changelog.svg)](https://travis-ci.org/CookPete/auto-changelog)
+[![Dependency Status](https://david-dm.org/CookPete/auto-changelog.svg)](https://david-dm.org/CookPete/auto-changelog)
+[![devDependency Status](https://david-dm.org/CookPete/auto-changelog/dev-status.svg)](https://david-dm.org/CookPete/auto-changelog#info=devDependencies)
+
+### Installation
+
+```bash
+npm install -g auto-changelog
+```
+
+### Usage
+
+```bash
+auto-changelog # Outputs log to CHANGELOG.md in current directory
+```
+
+### Todo
+
+- Specify output file
+- More templates
+- Better error handling

package.json

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+{
+  "name": "auto-changelog",
+  "version": "0.0.1",
+  "description": "Command line tool for generating a changelog from git tags and commit history",
+  "bin": {
+    "auto-changelog": "./lib/index.js"
+  },
+  "scripts": {
+    "lint": "standard --verbose | snazzy",
+    "test": "mocha test --compilers js:babel-core/register",
+    "clean": "rm -rf lib",
+    "build": "babel src -d lib",
+    "prepublish": "npm run build",
+    "postpublish": "npm run clean"
+  },
+  "author": "Pete Cook <[email protected]> (http://github.com/cookpete)",
+  "homepage": "https://github.com/CookPete/auto-changelog",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/CookPete/auto-changelog.git"
+  },
+  "bugs": {
+    "url": "https://github.com/CookPete/auto-changelog/issues"
+  },
+  "keywords": [
+    "auto",
+    "automatic",
+    "changelog",
+    "change",
+    "log",
+    "generator",
+    "git",
+    "commit",
+    "commits",
+    "history"
+  ],
+  "license": "CC0-1.0",
+  "dependencies": {
+    "array.prototype.find": "^1.0.0",
+    "semver": "^5.1.0"
+  },
+  "devDependencies": {
+    "babel-cli": "^6.3.17",
+    "babel-core": "^6.3.26",
+    "babel-eslint": "^4.1.6",
+    "babel-preset-es2015": "^6.3.13",
+    "babel-preset-stage-0": "^6.3.13",
+    "chai": "^3.4.1",
+    "mocha": "^2.3.4",
+    "snazzy": "^2.0.1"
+  },
+  "babel": {
+    "presets": [
+      "es2015",
+      "stage-0"
+    ]
+  },
+  "standard": {
+    "parser": "babel-eslint"
+  }
+}

src/commits.js

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+import 'array.prototype.find'
+
+const COMMIT_SEPARATOR = '===COMMIT_SEPARATOR==='
+const MESSAGE_SEPARATOR = '---MESSAGE_SEPARATOR---'
+
+export const LOG_FORMAT = COMMIT_SEPARATOR + '%H%n%D%n%aI%n%an%n%ae%n%B' + MESSAGE_SEPARATOR
+
+const MATCH_COMMIT = /(.*)\n(.*)\n(.*)\n(.*)\n(.*)\n([\S\s]+)/
+const MATCH_STATS = /(\d+) files? changed(?:, (\d+) insertions?...)?(?:, (\d+) deletions?...)?/
+const TAG_PREFIX = 'tag: '
+
+// https://help.github.com/articles/closing-issues-via-commit-messages
+const MATCH_ISSUE_FIX = /(?:close(?:s|d)?|fix(?:es|ed)?|resolve(?:s|d)?)\s(#\d+|https?\:\/\/github\.com\/[^\/]+\/[^\/]+\/issues\/\d+)/gi
+const MATCH_PULL_MERGE = /Merge pull request (#\d+) from .+\n\n(.+)/
+
+export function parseCommits (string) {
+  return string.split(COMMIT_SEPARATOR).slice(1).map(commit => {
+    const [, hash, refs, date, author, email, tail] = commit.match(MATCH_COMMIT)
+    const [message, stats] = tail.split(MESSAGE_SEPARATOR)
+    return {
+      hash,
+      tag: refs ? tagFromRefs(refs) : null,
+      author,
+      email,
+      date,
+      subject: getSubject(message),
+      message: message.trim(),
+      ...parseStats(stats.trim())
+    }
+  })
+}
+
+function tagFromRefs (refs) {
+  const valid = refs.split(', ').find(ref => ref.indexOf(TAG_PREFIX) === 0)
+  return valid ? valid.replace(TAG_PREFIX, '') : null
+}
+
+function parseStats (stats) {
+  if (!stats) return {}
+  const [, files, insertions, deletions] = stats.match(MATCH_STATS)
+  return {
+    files: parseInt(files || 0, 10),
+    insertions: parseInt(insertions || 0, 10),
+    deletions: parseInt(deletions || 0, 10)
+  }
+}
+
+export function findFixes (message) {
+  let fixes = []
+  let match = MATCH_ISSUE_FIX.exec(message)
+  if (!match) return null
+  while (match) {
+    fixes.push(match[1] || match[2])
+    match = MATCH_ISSUE_FIX.exec(message)
+  }
+  return fixes
+}
+
+export function findMerge (message) {
+  const match = message.match(MATCH_PULL_MERGE)
+  if (match) {
+    return {
+      pr: match[1],
+      message: match[2]
+    }
+  }
+  return null
+}
+
+function getSubject (message) {
+  return message.match(/[^\n]+/)[0]
+}

src/index.js

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+#! /usr/bin/env node
+
+import { writeFile } from 'fs'
+
+import { cmd } from './utils'
+import { parseCommits, LOG_FORMAT } from './commits'
+import { parseReleases } from './releases'
+import Template from './templates/Base'
+
+function getCommits () {
+  return cmd('git', ['log', '--shortstat', '--pretty=format:' + LOG_FORMAT]).then(parseCommits)
+}
+
+function getOrigin () {
+  return cmd('git', ['remote', 'show', 'origin']).then(origin => {
+    const match = origin.match(/https:\/\/github.com\/[^\/]+\/[^\.]+/)
+    if (!match) {
+      throw new Error('Must have a git remote called origin')
+    }
+    return match[0]
+  })
+}
+
+Promise.all([ getCommits(), getOrigin() ]).then(([ commits, origin ]) => {
+  const releases = parseReleases(commits)
+  const log = new Template(origin).render(releases)
+  return new Promise((resolve, reject) => {
+    writeFile('CHANGELOG.md', log, err => {
+      if (err) reject(err)
+      resolve(log)
+    })
+  })
+}).then(
+  () => process.exit(0),
+  e => console.error(e.message)
+)

src/releases.js

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+import semver from 'semver'
+
+import { uniq } from './utils'
+import { findFixes, findMerge } from './commits'
+
+export function parseReleases (commits) {
+  const initial = [ newRelease() ]
+  return commits.reduce(commitReducer, initial).reverse()
+}
+
+function newRelease (commit) {
+  const release = {
+    commits: [],
+    fixes: [],
+    merges: []
+  }
+  if (commit) {
+    release.tag = commit.tag
+    release.date = commit.date
+  }
+  return release
+}
+
+function commitReducer (releases, commit) {
+  if (commit.tag && semver.valid(commit.tag)) {
+    releases[0].fixes = uniq(releases[0].fixes, 'issue') // Remove duplicate fixes
+    releases.unshift(newRelease(commit))
+  }
+
+  const merge = findMerge(commit.message)
+  const fixes = findFixes(commit.message)
+
+  if (merge) {
+    releases[0].merges.push(merge)
+  } else if (fixes) {
+    releases[0].fixes.push({ fixes, commit })
+  } else if (filterCommit(commit)) {
+    releases[0].commits.push(commit)
+  }
+
+  return releases
+}
+
+function filterCommit (commit) {
+  return !semver.valid(commit.subject) // Filter out version commits
+}