Add changelog.js for CHANGELOG.md [skip ci]

changelog.js

@@ -0,0 +1,70 @@
+'use strict'
+
+// TODO: consider migrate to the "conventional-changelog-angular"
+
+const url = require('./package.json').repository.url
+const exec = require('child_process').exec
+
+exec('git log --pretty=format:"%b"', (error, stdout, stderr) => {
+  if (error) {
+    console.error(error)
+    process.exit(1)
+  }
+
+  // "reverts commit 6537cab0bf940cf7b780a87c8c754d380b4cd5ba"
+  // -> "6537cab0bf940cf7b780a87c8c754d380b4cd5ba"
+  const pattern = 'reverts commit ([\\w\\d]{40})'
+  const strs = stdout.match(new RegExp(pattern, 'g')) || []
+  const reverts = strs.map((str) => (str.match(new RegExp(pattern)))[1])
+
+  const script = 'git log --pretty=format:"[%ad] %H %an : %s"'
+  exec(script, (error, stdout, stderr) => {
+    if (error) {
+      console.error(error)
+      process.exit(1)
+    }
+
+    const logs = []
+    stdout.split('\n').forEach((line) => {
+      const matches = line.match(/^\[(.+?)\] (\w+) (.+?) : (.+?)$/)
+      const date = new Date(matches[1]).toLocaleString()
+      const hash = matches[2]
+      const commiter = matches[3]
+      const subject = matches[4] || ''
+
+      if (reverts.indexOf(hash) > -1) {
+        return
+      }
+
+      const semver = subject.match(/^([\d.]+)/)
+      if (semver) {
+        const version = semver[0]
+        logs.push('')
+        logs.push(version)
+        logs.push('---')
+
+        const isTag = version === subject
+        if (isTag) {
+          return
+        }
+      }
+
+      const commitUrl = url.replace(/(.git|\/)$/, '') + '/commit/' + hash
+      const normalizeCommiter = commiter.replace('horse_n_deer', '59naga')
+      const issueUrlBase = url.replace(/(.git|\/)$/, '') + '/issues/'
+      const linkedDescription = subject.split('`').map((chunk, i) => {
+        if (i % 2 === 1) {
+          return chunk // ignore if code-block
+        }
+        return chunk.replace(/#([\d]+)/, (str, issueNumber) => {
+          return `[${str}](${issueUrlBase}${issueNumber})`
+        })
+      }).join('`')
+
+      let log = ` - [${date}](${commitUrl}) ${linkedDescription} by ${normalizeCommiter}`
+      logs.push(log)
+    })
+    process.stdout.write(logs.join('\n') + '\n')
+    process.exit(0)
+  })
+})

package.json

@@ -23,6 +23,8 @@
     "cover:test": "nyc --reporter=lcov --reporter=text npm test",
     "cover:report": "npm-if TRAVIS \"codeclimate-test-reporter < coverage/lcov.info\"",
     "lint": "eslint src test",
+    "version": "node changelog.js > CHANGELOG.md && git add CHANGELOG.md",
+    "postversion": "git push --follow-tags",
     "build": "abby compile --log --env"
   },
   "nyc": {