Dependabot PRs result in an empty release

[NicholasBoll]

We ignore PR lint rules for dependabot PRs because they are autogenerated, but this causes empty releases because this causes empty merge messages.

For example, the release notes are empty: https://github.com/Workday/canvas-kit/releases/tag/v7.0.13

Here's the PR: Workday/canvas-kit#1492

The dependabot PRs lack the normally required "sections" (category and summary). The utility function that needs to be updated is the getSections found here:

canvas-kit-actions/src/utils.ts

Lines 101 to 153 in 79d637f

	export function getSections(input: string): Sections {
	let activeSection: keyof Sections | '' = ''
	const sections = input
	.replace(/\r/g, '')
	.split('\n')
	.reduce((result, line) => {
	const headingMatch = line.match(/^#+\s+(.+)/)
	const badgeMatch = line.match(
	/^!\[[a-z]+\]\(https:\/\/img.shields.io\/badge\/([a-z_]+)-([a-z_]+)-[a-z]+\)/i,
	)
	if (headingMatch) {
	const heading = headingMatch[1].trim().toLowerCase()
	if (isValidHeading(heading)) {
	activeSection = heading
	result[activeSection] = ''
	} else {
	// Deactivate active section until a new one is found
	activeSection = ''
	}
	} else if (badgeMatch) {
	const heading = badgeMatch[1].replace(/_/g, ' ').trim()
	const value = badgeMatch[2].replace(/_/g, ' ').trim()
	if (isValidHeading(heading)) {
	result[heading] = value
	// we're done with this heading, deactivate the section
	activeSection = ''
	}
	} else {
	// A horizontal rule will break out of a section
	if (line.trim() === '---') {
	activeSection = ''
	}
	if (activeSection) {
	result[activeSection] += `\n${line}`
	}
	}
	return result
	}, {} as Sections)
	// trim sections and remove comments
	for (const [key, value] of Object.entries(sections)) {
	sections[key as keyof Sections] = value
	.replace(/<!--[\s\S]+?-->/gm, '') // replace comments non-greedily in multiline mode
	.replace(/[\n]{2,}/g, '\n\n') // assume more than 2 newlines in a row are a mistake, perhaps from removing comments
	.trim()
	}
	return sections
	}

The tests for getSections are unit tests found here:

canvas-kit-actions/src/utils.test.ts

Lines 182 to 290 in 79d637f

	describe('getSections', () => {
	it('should parse headings into sections', () => {
	const input = stripIndent`
	## Summary
	My summary
	## Release Category
	Components
	## Release Note
	My release notes
	### BREAKING CHANGES
	Some breaking changes
	`
	const expected = {
	summary: 'My summary',
	'release category': 'Components',
	'release note': 'My release notes',
	'breaking changes': 'Some breaking changes',
	}
	expect(getSections(input)).toEqual(expected)
	})
	it('should parse headings and a category shield', () => {
	const input = stripIndent`
	## Summary
	My summary
	
	## Release Note
	My release notes
	### BREAKING CHANGES
	Some breaking changes
	`
	const expected = {
	summary: 'My summary',
	'release category': 'Components',
	'release note': 'My release notes',
	'breaking changes': 'Some breaking changes',
	}
	expect(getSections(input)).toEqual(expected)
	})
	})
	describe('getCommitParts', () => {
	// it('should leave the ')
	it('should extract the parts of a commit message', () => {
	const input = stripIndent`
	feat(tooltip): Fix OverflowTooltip with SVG icons in IE11 (#1234)
	My summary
	[category:Components]
	Release Note:
	My release notes
	### BREAKING CHANGES
	Some breaking changes
	`
	const expected = {
	title: 'feat(tooltip): Fix OverflowTooltip with SVG icons in IE11',
	pull_request: '1234',
	category: 'Components',
	'release note': 'My release notes',
	'breaking change': 'Some breaking changes',
	}
	expect(getCommitParts(input)).toEqual(expected)
	})
	it('should remove the breaking indicator from the title', () => {
	const input = stripIndent`
	feat(tooltip)!: Fix OverflowTooltip with SVG icons in IE11 (#1234)
	`
	const expected = {
	title: 'feat(tooltip): Fix OverflowTooltip with SVG icons in IE11',
	pull_request: '1234',
	category: 'Components',
	}
	expect(getCommitParts(input)).toEqual(expected)
	})
	it('should guess that "ci:" is infrastructure', () => {
	const input = stripIndent`
	ci: Upgrade to Github Actions (#1234)
	My summary
	`
	const expected = {
	title: 'ci: Upgrade to Github Actions',
	pull_request: '1234',
	category: 'Infrastructure',
	}
	expect(getCommitParts(input)).toEqual(expected)
	})
	})

The tests are set up the following way:

• input: The PR body. The contents of a Dependabot PR could be copy/pasted into the test
• expected: The sections that will be passed to create a merge title and body

For example, the linked PR should produce an expected sections like the following:

      const expected = {
        summary: 'Bumps [prismjs](https://github.com/PrismJS/prism) from 1.25.0 to 1.27.0.',
        'release category': 'Dependencies',
      }

No other code needs to be updated other than utils.ts and utils.test.ts which means the code should be 100% unit tested without worry our CI will crash!

[NicholasBoll]

Here's the test that should pass:

    it('should parse dependabot pull requests', () => {
      const input = stripIndent`
      Bumps [prismjs](https://github.com/PrismJS/prism) from 1.25.0 to 1.27.0.
      <details>
      <summary>Release notes</summary>
      <p><em>Sourced from <a href="https://github.com/PrismJS/prism/releases">prismjs's releases</a>.</em></p>
      <blockquote>
      <h2>v1.27.0</h2>
      <p>Release 1.27.0</p>
      <h2>v1.26.0</h2>
      <p>Release 1.26.0</p>
      </blockquote>
      </details>

      [![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=prismjs&package-manager=npm_and_yarn&previous-version=1.25.0&new-version=1.27.0)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

      Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting \`@dependabot rebase\`.

      [//]: # (dependabot-automerge-start)
      [//]: # (dependabot-automerge-end)

      ---

      <details>
      <summary>Dependabot commands and options</summary>
      <br />
      You can disable automated security fix PRs for this repo from the [Security Alerts page](https://github.com/Workday/canvas-kit/network/alerts).
      </details>
      `

      const expected = {
        summary: 'Bumps [prismjs](https://github.com/PrismJS/prism) from 1.25.0 to 1.27.0.',
        'release category': 'Dependencies',
      }

      expect(getSections(input)).toEqual(expected)
    })