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@bumbu
Created April 10, 2017 14:54
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A script to prepend JIRA tag to the commit message based on branch name. Run from commit-msg git hook.
#!/usr/bin/env node
import * as fs from 'fs';
const JIRA_TAG = 'TAG';
/* If message title:
* * Doesn't start with square brackets []
* * Doesn't start with Merge branch
* * Doesn't start with Merge pull request
* * Doesn't start with #
* and
* branch name starts with ${JIRA_TAG}-XXX (e.g. TAG-123-branch-description)
* then prepend the issue tag to the commit message
*
* My awesome commit -> [TAG-123] My awesome commit
*/
const startsWithBraces = (str) => str.match(/^\[[^\]]/);
const startsWithMergeBranch = (str) => str.indexOf('Merge branch') === 0;
const startsWithMergePR = (str) => str.indexOf('Merge pull request') === 0;
const startsWithHash = (str) => str.indexOf('#') === 0;
const isInvalidMessage = (str) =>
!startsWithBraces(str) && !startsWithMergeBranch(str) && !startsWithMergePR(str) && !startsWithHash(str);
const tagMatcher = new RegExp(`^${JIRA_TAG}-\\d+`, 'i');
const getIssueTagFromBranchName = (str) => {
const matched = str.match(tagMatcher);
return matched && matched[0];
};
const messageFile = process.env.GIT_PARAMS;
const message = fs.readFileSync(messageFile, { encoding: 'utf-8' });
const messageTitle = message.split('\n')[0];
const branchName = require('child_process').execSync('git rev-parse --abbrev-ref HEAD', { encoding: 'utf-8' }).split('\n')[0];
const issueTag = getIssueTagFromBranchName(branchName);
if (issueTag && isInvalidMessage(messageTitle)) {
// Apply the issue tag to message title
const messageLines = message.split('\n');
messageLines[0] = `[${issueTag.toUpperCase()}] ${messageTitle}`;
fs.writeFileSync(messageFile, messageLines.join('\n'), { encoding: 'utf-8' });
console.log(`New message title: ${messageLines[0]}`);
}
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