@trailstash/ultra/build-pinhead-compat.js

A web based tool for making MapLibre GL maps with data from sources such as Overpass, GeoJSON, GPX, KML, TCX, etc

import fs from "fs";

import changelog from "@waysidemapping/pinhead/dist/changelog.json" with { type: "json" };
import index from "@waysidemapping/pinhead/dist/icons/index.json" with { type: "json" };

const aliases = structuredClone(index.icons);

for (const { iconChanges } of changelog.reverse()) {
  for (const { newId, oldId } of iconChanges) {
    if (!newId || !oldId) continue;
    if (newId === oldId) continue;
    if (!aliases[oldId]) {
      aliases[oldId] = structuredClone(aliases[newId]);
      aliases[newId][oldId] = true;
    }
  }
}

for (const r of ["", "@2x"]) {
  const f = `static/sprites/pinhead${r}.json`;
  const sprites = JSON.parse(fs.readFileSync(f));
  for (const key of Object.keys(sprites)) {
    for (const alias of Object.keys(aliases[key])) {
      console.log(`adding alias ${alias}->${key}`);
      sprites[alias] = sprites[key];
    }
  }
  fs.writeFileSync(f, JSON.stringify(sprites));
}