ShiboSoftwareDev/MSP-EXP430FR2433

scripts/fix-kicad-export.mjs

import { readFileSync, writeFileSync } from "node:fs"
import { resolve } from "node:path"

const inputPath = resolve(process.argv[2])
const outputPath = resolve(process.argv[3] ?? process.argv[2])
let pcb = readFileSync(inputPath, "utf8")

// circuit-json-to-kicad currently emits the pre-KiCad-9 numeric layer IDs.
// KiCad 9+ uses a different fixed ID table, including even IDs for copper.
const kicad9LayerIds = {
  "F.Cu": 0,
  "In1.Cu": 2,
  "In2.Cu": 4,
  "B.Cu": 6,
  "F.Mask": 1,
  "B.Mask": 3,
  "F.SilkS": 5,
  "B.SilkS": 7,
  "F.Adhes": 9,
  "B.Adhes": 11,
  "F.Paste": 13,
  "B.Paste": 15,
  "Dwgs.User": 17,
  "Cmts.User": 19,
  "Eco1.User": 21,
  "Eco2.User": 23,
  "Edge.Cuts": 25,
  Margin: 27,
  "B.CrtYd": 29,
  "F.CrtYd": 31,
  "B.Fab": 33,
  "F.Fab": 35,
}
for (const [name, id] of Object.entries(kicad9LayerIds)) {
  const escapedName = name.replaceAll(".", "\\.")
  pcb = pcb.replace(
    new RegExp(`^(\\s*)\\(\\d+ "${escapedName}" (signal|user)\\)$`, "m"),
    `$1(${id} "${name}" $2)`,
  )
}

pcb = pcb
  .replace("(generator circuit-json-to-kicad)", '(generator "circuit-json-to-kicad")')
  .replace("(generator_version 0.0.1)", '(generator_version "0.0.1")')

// KiCad 10 requires layer-name atoms and the paper name to be quoted.
pcb = pcb.replace(/\(paper\s+A4\s*\)/g, '(paper "A4")')
pcb = pcb.replace(
  /\((layer|layers) ([^)\r\n]+)\)/g,
  (_match, keyword, names) => {
    const quotedNames = names
      .trim()
      .split(/\s+/)
      .map((name) => (name.startsWith('"') ? name : `"${name}"`))
      .join(" ")
    return `(${keyword} ${quotedNames})`
  },
)

// KiCad vias name exactly their start and end copper layers. The converter
// emits every traversed layer, which crashes KiCad's board loader.
pcb = pcb.replace(
  /\(layers ((?:"(?:F\.Cu|In1\.Cu|In2\.Cu|B\.Cu)"\s*){3,})\)/g,
  (_match, layerList) => {
    const layers = layerList.match(/"[^"]+"/g)
    return `(layers ${layers[0]} ${layers.at(-1)})`
  },
)

// KiCad's s-expression number lexer does not accept JavaScript exponent form.
pcb = pcb.replace(/[+-]?\d+\.\d+[eE][+-]?\d+/g, (number) => {
  const fixed = Number(number).toFixed(12).replace(/\.?0+$/, "")
  return fixed === "-0" || fixed === "" ? "0" : fixed
})

writeFileSync(outputPath, pcb)
console.log(`Corrected tscircuit KiCad layer syntax in ${outputPath}`)