dot-files/dot_config/git/template/hooks/executable_prepare-commit-msg.tmpl

// chezmoi:template:left-delimiter="/*{{"
// chezmoi:template:right-delimiter="}}*/"
/*{{- /* vim: set filetype=javascript: */ -}}*/
/*{{ if and .hellotech (lookPath "node") -}}*/
#!/usr/bin/env node

const fs = require("fs");
const childProcess = require("child_process");
const { promisify } = require("util");

const exec = promisify(childProcess.exec);
const readFile = promisify(fs.readFile);
const writeFile = promisify(fs.writeFile);

const [, , message, mode] = process.argv;

async function main() {
  const file = await readFile(message, { encoding: "utf8" });
  let result;
  try {
    result = await exec("git rev-parse --abbrev-ref HEAD");
  } catch (err) {
    return
  }

  if (message.match(/^#/)) {
    return
  }

  const tags = result.stdout
    .split("\n")
    .map(branch => branch.match(/[A-Z]+-\d+/g))
    .filter(x => !!x)
    .reduce((allIDs, matchedIDs) => [...allIDs, ...matchedIDs], [])
    .map(id => `[${id}]`);

  if (tags.length === 0) {
    return;
  }
  if (tags.find(tag => file.includes(tag))) {
    return;
  }

  const newFile = mode === 'message'
    ? file + '\n\n'  + tags.join(" ")
    : `\n\n# ` + tags.join(" ") + "\n" + file;

  await writeFile(message, newFile);
}

main().catch(err => {
  console.error(err);
  process.exit(1);
});
/*{{- end }}*/