color-name-list/scripts/tools/history.js

long list of color names

import { execSync } from 'child_process';

function cmd(c) {
  const stdout = execSync(c, {
    maxBuffer: 1024 * 1024 * 100,
  });
  return stdout.toString().trim();
}

// Print the list of colors added/removed/changed by date.
async function main() {
  // Grab the list of all git commits
  const allCommits = cmd('git log --pretty=format:%h --no-merges --follow -- ./src/colornames.csv')
    .split('\n')
    .filter(Boolean);

  // The data, one element for each commit (date)
  const dat = [];

  for (const commit of allCommits) {
    // Figure out what changed in that particular commit
    const diff = cmd(`git show -w --ignore-cr-at-eol ${commit} -- ./src/colornames.csv`)
      .split('\n')
      .filter(Boolean);

    // Grab the date for said commit
    const dt = cmd(`git show -s ${commit} --format=%ci`);

    // The list of colors modified (indexed by hex value) with "op" (+/-/~)
    const modified = {};

    for (const line of diff) {
      // Ignore the header row
      if (line.match(/^(\+|-)?name,hex/)) {
        continue;
      }

      const res = line.match(/^((?<op>(\+|-)))(?<name>[^,]+),(?<hex>[^,]+)/);
      if (!res) {
        continue;
      }
      const name = res.groups?.name;
      const hex = res.groups?.hex?.trim(); // Remove any \r or whitespace
      let op = res.groups?.op;

      // If a value already introduced with a different op, then it's
      // a modification
      if (modified[hex] && modified[hex].op !== op) {
        op = '~';
      }

      modified[hex] = { hex, name, op };
    }

    // Partition by added/removed/changed

    const added = Object.values(modified)
      .filter((x) => x.op === '+')
      .map(({ name, hex }) => ({ name, hex }));

    const removed = Object.values(modified)
      .filter((x) => x.op === '-')
      .map(({ name, hex }) => ({ name, hex }));

    const changed = Object.values(modified)
      .filter((x) => x.op === '~')
      .map(({ name, hex }) => ({ name, hex }));

    // Add the day only if there were changes
    if (added.length > 0 || removed.length > 0 || changed.length > 0) {
      dat.push({ date: dt, added, removed, changed });
    }
  }

  console.log(JSON.stringify(dat));
}

main();