1import { spawn } from 'node:child_process'2import { access, readFile, readdir } from 'node:fs/promises'3import { basename, join, resolve } from 'node:path'45const pythonDirectory = resolve(import.meta.dirname, '../python')6const units = []7for (const entry of (await readdir(pythonDirectory, { withFileTypes: true }))8 .filter(entry => entry.isDirectory())9 .sort((left, right) => left.name.localeCompare(right.name))) {10 const directory = join(pythonDirectory, entry.name)11 try {12 const configPath = join(directory, 'wrangler.jsonc')13 await access(configPath)14 const config = JSON.parse(await readFile(configPath, 'utf8'))15 if (!config.name) throw new Error(`${entry.name}/wrangler.jsonc does not declare a Worker name.`)16 units.push({17 directory,18 name: config.name,19 dependencies: (config.services ?? []).map(service => service.service),20 })21 } catch {22 // A Python support directory without a Wrangler config is not deployable.23 }24}2526if (units.length === 0) throw new Error('No Python Worker units were discovered.')27const names = new Set(units.map(unit => unit.name))28if (names.size !== units.length) throw new Error('Python Worker configuration names must be unique.')2930async function deploy(cwd) {31 await new Promise((resolvePromise, reject) => {32 const child = spawn('uv', ['run', 'pywrangler', 'deploy'], { cwd, stdio: 'inherit' })33 child.on('error', reject)34 child.on('exit', code => code === 0 ? resolvePromise() : reject(new Error(`${basename(cwd)} deployment exited ${code}`)))35 })36}3738const remaining = new Map(units.map(unit => [unit.name, unit]))39let deployed = 040while (remaining.size > 0) {41 const ready = [...remaining.values()].filter(unit =>42 unit.dependencies.every(dependency => !names.has(dependency) || !remaining.has(dependency)),43 )44 if (ready.length === 0) {45 throw new Error(`Cyclic Python Worker service dependencies: ${[...remaining.keys()].join(', ')}`)46 }47 for (const unit of ready) {48 await deploy(unit.directory)49 remaining.delete(unit.name)50 deployed += 151 }52}53console.log(`${deployed}/${units.length} Python renderer units deployed`)