feat(jiraIssue): add initial implementation (#1)

`jiraIssue()` is a Danger plugin that adds a JIRA issue link to the Danger pull request comment.
If a pull request title does not contain the supplied JIRA issue identifier (e.g. ABC-123),
then Danger will comment with a warning on the pull request asking the developer
to include the JIRA issue identifier in the pull request title.

Example usage:

```js
// dangerfile.js
import jiraIssue from 'danger-plugin-jira-issue'

jiraIssue({
  key: 'JIRA',
  url: 'https://myjira.atlassian.net/browse',
  emoji: ':paperclip:',
})
```

BREAKING CHANGE: this commit introduces functionality ready for a 1.0.0 release.

Author: macklinu

.esdoc.json

@@ -0,0 +1,4 @@
+{
+  "source": "./src",
+  "destination": "./docs"
+}

.gitignore

@@ -64,3 +64,6 @@ typings/
 
 # Distributed source
 dist/
+
+# Generated documentation
+docs/

.npmignore

@@ -0,0 +1,7 @@
+.babelrc
+.editorconfig
+.esdoc.json
+.travis.yml
+yarn.lock
+node_modules/
+src/

.travis.yml

@@ -7,7 +7,6 @@ notifications:
 node_js:
   - '7'
   - '6'
-  - '4'
 before_script:
   - npm prune
 after_success:

README.md

@@ -14,16 +14,21 @@ Install:
 yarn add danger-plugin-jira-issue --dev
 ```
 
-Import and invoke the `jiraIssue()` function in your `dangerfile.js` or `dangerfile.ts`:
+At a glance:
 
 ```js
+// dangerfile.js
 import jiraIssue from 'danger-plugin-jira-issue'
 
 jiraIssue({
-  // TODO options
+  key: 'JIRA',
+  url: 'https://myjira.atlassian.net/browse',
+  emoji: ':paperclip:',
 })
 ```
 
+See the [documentation](https://doc.esdoc.org/github.com/macklinu/danger-plugin-jira-issue/) for detailed information .
+
 ## Development
 
 Install [Yarn](https://yarnpkg.com/en/), and install the dependencies - `yarn install`.

package.json

@@ -3,12 +3,15 @@
   "version": "0.0.0-development",
   "description": "Danger plugin to link JIRA issue in pull request",
   "main": "dist/index.js",
+  "types": "types/index.d.ts",
   "scripts": {
     "precommit": "lint-staged",
     "commit": "git-cz",
     "commitmsg": "validate-commit-msg",
-    "build": "babel src --out-dir dist --ignore __tests__,__mocks__",
+    "build": "babel src --out-dir dist --ignore *.test.js",
     "test": "jest",
+    "predocs": "rm -rf docs/",
+    "docs": "esdoc -c .esdoc.json",
     "prepublish": "npm run build",
     "semantic-release": "semantic-release pre && npm publish && semantic-release post"
   },
@@ -27,17 +30,23 @@
     "url": "https://github.com/macklinu/danger-plugin-jira-issue/issues"
   },
   "homepage": "https://github.com/macklinu/danger-plugin-jira-issue#readme",
+  "engines": {
+    "node": ">= 6.0.0"
+  },
   "devDependencies": {
     "babel-cli": "^6.24.1",
     "babel-jest": "^20.0.1",
     "babel-preset-es2015": "^6.24.1",
     "commitizen": "^2.9.6",
     "cz-conventional-changelog": "^2.0.0",
+    "esdoc": "^0.5.2",
     "husky": "^0.13.3",
     "jest": "^20.0.1",
     "lint-staged": "^3.4.1",
     "prettier": "^1.3.1",
     "semantic-release": "^6.3.6",
+    "typescript": "^2.3.2",
+    "typings-tester": "^0.2.2",
     "validate-commit-msg": "^2.12.1"
   },
   "config": {
@@ -47,7 +56,7 @@
   },
   "lint-staged": {
     "*.js": [
-      "prettier --single-quote --trailing-comma=all --no-semi",
+      "prettier --single-quote --trailing-comma=all --no-semi --write",
       "git add"
     ]
   }

src/__tests__/index.test.js

@@ -1 +1,30 @@
-export default function jiraIssue() {}
+import { join } from 'path'
+
+const link = (href, text) => `<a href="${href}">${text}</a>`
+
+/**
+ * A Danger plugin to add a JIRA issue link to the Danger pull request comment.
+ * If a pull request title does not contain the supplied JIRA issue identifier (e.g. ABC-123),
+ * then Danger will comment with a warning on the pull request asking the developer
+ * to include the JIRA issue identifier in the pull request title.
+ *
+ * @param {Object} options - The JIRA options object.
+ * @param {string} options.key - The JIRA issue key (e.g. the ABC in ABC-123).
+ * @param {string} options.url - The JIRA instance issue base URL (e.g. https://jira.atlassian.com/browse/).
+ * @param {string} [options.emoji=':link:'] - The emoji to display with the JIRA issue link.
+ * See the possible emoji values, listed as keys in the [GitHub API `/emojis` response](https://api.github.com/emojis).
+ */
+export default function jiraIssue({ key, url, emoji = ':link:' } = {}) {
+  if (!url) throw Error(`'url' missing - must supply JIRA installation URL`)
+  if (!key) throw Error(`'key' missing - must supply JIRA issue key`)
+
+  const jiraKeyRegex = new RegExp(`^.*(${key}-[0-9]+).*$`, 'g')
+  const match = jiraKeyRegex.exec(danger.github.pr.title)
+  if (match) {
+    const jiraIssue = match[1]
+    const jiraUrl = link(join(url, jiraIssue), jiraIssue)
+    message(`${emoji} ${jiraUrl}`)
+  } else {
+    warn(`Please add the JIRA issue key to the PR title (e.g. ${key}-123)`)
+  }
+}

src/index.js

@@ -0,0 +1,84 @@
+import jiraIssue from '../'
+
+describe('jiraIssue()', () => {
+  beforeEach(() => {
+    global.warn = jest.fn()
+    global.message = jest.fn()
+  })
+  afterEach(() => {
+    global.danger = undefined
+    global.warn = undefined
+    global.message = undefined
+  })
+  it('throws when supplied invalid configuration', () => {
+    expect(() => jiraIssue()).toThrow()
+    expect(() => jiraIssue({})).toThrow()
+    expect(() => jiraIssue({ key: 'ABC' })).toThrow()
+    expect(() => jiraIssue({ url: 'http://my.jira/browse' })).toThrow()
+  })
+  it('warns when PR title is missing JIRA issue key', () => {
+    global.danger = { github: { pr: { title: 'Change some things' } } }
+    jiraIssue({
+      key: 'ABC',
+      url: 'http://my.jira/browse',
+    })
+    expect(global.warn).toHaveBeenCalledWith(
+      'Please add the JIRA issue key to the PR title (e.g. ABC-123)',
+    )
+  })
+  it('adds the JIRA issue link to the messages table', () => {
+    global.danger = {
+      github: { pr: { title: '[ABC-808] Change some things' } },
+    }
+    jiraIssue({
+      key: 'ABC',
+      url: 'http://my.jira/browse',
+    })
+    expect(global.message).toHaveBeenCalledWith(
+      ':link: <a href="http:/my.jira/browse/ABC-808">ABC-808</a>',
+    )
+  })
+  it('properly concatenates URL parts (trailing slash in url)', () => {
+    global.danger = {
+      github: { pr: { title: '[ABC-808] Change some things' } },
+    }
+    jiraIssue({
+      key: 'ABC',
+      url: 'http://my.jira/browse/',
+    })
+    expect(global.message).toHaveBeenCalledWith(
+      ':link: <a href="http:/my.jira/browse/ABC-808">ABC-808</a>',
+    )
+  })
+  it('matches JIRA issue anywhere in title', () => {
+    global.danger = { github: { pr: { title: 'My changes - ABC-123' } } }
+    jiraIssue({
+      key: 'ABC',
+      url: 'http://my.jira/browse',
+    })
+    expect(global.message).toHaveBeenCalledWith(
+      ':link: <a href="http:/my.jira/browse/ABC-123">ABC-123</a>',
+    )
+  })
+  it('does not match lowercase JIRA key in PR title', () => {
+    global.danger = {
+      github: { pr: { title: '[abc-808] Change some things' } },
+    }
+    jiraIssue({
+      key: 'ABC',
+      url: 'http://my.jira/browse',
+    })
+    expect(global.warn).toHaveBeenCalled()
+  })
+  it('honors custom emoji configuration', () => {
+    global.danger = { github: { pr: { title: '(ABC-123) Change stuff' } } }
+    jiraIssue({
+      key: 'ABC',
+      url: 'http://my.jira/browse',
+      emoji: ':paperclip:',
+    })
+    expect(global.message).toHaveBeenCalledWith(
+      ':paperclip: <a href="http:/my.jira/browse/ABC-123">ABC-123</a>',
+    )
+  })
+})

src/index.test.js

@@ -0,0 +1,7 @@
+interface Options {
+  key: string
+  url: string
+  emoji?: string
+}
+
+export default function jiraIssue(options: Options): void