feat: add cliffy

cli/bin.ts

@@ -1,31 +1,38 @@
 import { CapiBinary } from "../deps/capi_binary_builds.ts"
+import { Command } from "../deps/cliffy.ts"
 
-export default async function(
+export const bin = new Command()
+  .description("Execute <binary>@<version> with [args...]")
+  .arguments("<binary:string> <version:string> [...args:string]")
+  .stopEarly()
+  .example("run a polkadot node in dev mode", "capi bin polkadot v0.9.41 --dev")
+  .example(
+    "build a chain spec for Rococo local",
+    "capi bin polkadot v0.9.41 build-spec --chain rococo-local",
+  )
+  .action(runBin)
+
+async function runBin(
+  _options: void,
   binary: string,
   version: string,
   ...args: string[]
 ) {
-  if (!binary || !version) throw new Error("Must specify binary and version")
-
   const bin = new CapiBinary(binary, version)
-
   if (!(await bin.exists())) {
     console.error("Downloading", bin.key)
     await bin.download()
   }
-
   const child = new Deno.Command(bin.path, {
     args,
     stdin: "inherit",
     stdout: "inherit",
     stderr: "inherit",
   }).spawn()
-
   for (const signal of ["SIGTERM", "SIGINT"] satisfies Deno.Signal[]) {
     Deno.addSignalListener(signal, () => {
       child.kill(signal)
     })
   }
-
   Deno.exit((await child.status).code)
 }

cli/resolveNets.ts

@@ -1,17 +1,28 @@
 import * as $ from "../deps/scale.ts"
-import * as flags from "../deps/std/flags.ts"
 import * as path from "../deps/std/path.ts"
 import { NetSpec } from "../nets/mod.ts"
 
 const $nets = $.record($.instance(NetSpec as new() => NetSpec, $.tuple(), () => []))
 
-export async function resolveNets(...args: string[]): Promise<Record<string, NetSpec>> {
-  const { nets: netsPathRaw } = flags.parse(args, {
-    string: ["nets"],
-    default: { nets: "./nets.ts" },
-  })
-  const netsPath = path.resolve(netsPathRaw)
-  await Deno.stat(netsPath)
+export async function resolveNets(maybeNetsPath?: string): Promise<Record<string, NetSpec>> {
+  let netsPath
+  if (maybeNetsPath) {
+    netsPath = path.resolve(maybeNetsPath)
+    await Deno.stat(netsPath)
+  } else {
+    for (const p of ["nets.ts", "nets.js"]) {
+      try {
+        const resolved = path.resolve(p)
+        await Deno.stat(resolved)
+        netsPath = resolved
+      } catch (_e) {}
+    }
+  }
+  if (!netsPath) {
+    throw new Error(
+      "Could not resolve net specs path. Create a `nets.ts` file and export a net spec.",
+    )
+  }
   const nets = await import(path.toFileUrl(netsPath).toString())
   $.assert($nets, nets)
   for (const key in nets) nets[key]!.name = key

cli/serve.ts

@@ -1,6 +1,6 @@
-import * as flags from "../deps/std/flags.ts"
+import { Command } from "../deps/cliffy.ts"
 import { blue, gray, yellow } from "../deps/std/fmt/colors.ts"
-import { serve } from "../deps/std/http.ts"
+import { serve as httpServe } from "../deps/std/http.ts"
 import {
   createCodegenHandler,
   createCorsHandler,
@@ -12,33 +12,41 @@ import { gracefulExit } from "../util/mod.ts"
 import { tempDir } from "../util/tempDir.ts"
 import { resolveNets } from "./resolveNets.ts"
 
-export default async function(...args: string[]) {
-  const { port, "--": cmd, out, target } = flags.parse(args, {
-    string: ["port", "out", "target"],
-    default: {
-      port: "4646",
-      out: "target/capi",
-    },
-    "--": true,
-  })
+export const serve = new Command()
+  .description("Start the Capi server")
+  .option("-n, --nets <nets:file>", "nets.ts file path")
+  .option("-p, --port <port:number>", "", { default: 4646 })
+  .option(
+    "-o, --out <out:string>",
+    "Directory at which disk-related operations (such as storing devnet logs and caching metadata) can occur",
+    { default: "target/capi" },
+  )
+  .option("--target <target:string>", "target name in net.ts")
+  .action(runServe)
 
-  const nets = await resolveNets(...args)
+export interface RunServeOptions {
+  nets?: string
+  port: number
+  out: string
+  target?: string
+}
 
+async function runServe(
+  this: { getLiteralArgs(): string[] },
+  { nets: netsPath, port, out, target }: RunServeOptions,
+) {
+  const literalArgs = this.getLiteralArgs()
+  const nets = await resolveNets(netsPath)
   const devnetTempDir = await tempDir(out, "devnet")
-
   const href = `http://localhost:${port}/`
-
   const controller = new AbortController()
   const { signal } = controller
-
   const dataCache = new FsCache(out, signal)
   const tempCache = new InMemoryCache(signal)
-
   const running = await fetch(`${href}capi_cwd`)
     .then((r) => r.text())
     .then((r) => r === Deno.cwd())
     .catch(() => false)
-
   if (!running) {
     const devnetsHandler = createDevnetsHandler(devnetTempDir, nets, signal)
     const codegenHandler = createCodegenHandler(dataCache, tempCache)
@@ -52,7 +60,7 @@ export default async function(...args: string[]) {
       }
       return await codegenHandler(request)
     }))
-    await serve(handler, {
+    await httpServe(handler, {
       hostname: "::",
       port: +port,
       signal,
@@ -70,7 +78,7 @@ export default async function(...args: string[]) {
   }
 
   async function onReady() {
-    const [bin, ...args] = cmd
+    const [bin, ...args] = literalArgs
     if (bin) {
       const command = new Deno.Command(bin, {
         args,

cli/sync.ts

@@ -1,41 +1,53 @@
-import * as flags from "../deps/std/flags.ts"
+import { Command, EnumType } from "../deps/cliffy.ts"
 import { blue, gray } from "../deps/std/fmt/colors.ts"
 import { assertEquals } from "../deps/std/testing/asserts.ts"
 import { syncNets } from "../server/mod.ts"
 import { normalizePackageName } from "../util/mod.ts"
 import { tempDir } from "../util/tempDir.ts"
 import { resolveNets } from "./resolveNets.ts"
 
-export default async function(...args: string[]) {
-  const {
-    "import-map": importMapFile,
-    "package-json": packageJsonFile,
-    check,
-    out,
-    server,
-  } = flags.parse(args, {
-    string: ["config", "import-map", "out", "package-json", "server"],
-    boolean: ["check"],
-    default: {
-      server: "https://capi.dev/",
-      out: "target/capi",
-    },
+export const sync = new Command()
+  .type("runtime", new EnumType(["deno", "node"]))
+  .description("Sync net specs and update your manifest")
+  .arguments("<runtime:runtime>")
+  .option("-n, --nets <nets:file>", "nets.ts file path", { default: "./nets.ts" })
+  .option("--check", "ensures that metadata and codegen are in sync")
+  .option("-o, --out <out:string>", "Metadata and codegen output directory", {
+    default: "target/capi",
   })
+  .option("-s, --server <server:string>", "", { default: "https://capi.dev/" })
+  .option(
+    "--runtime-config <runtimeConfig:string>",
+    "the import_map.json or package.json file path",
+  )
+  .action(runSync)
 
-  const netSpecs = await resolveNets(...args)
+export interface RunSyncOptions {
+  nets: string
+  check?: true
+  out: string
+  server: string
+  runtimeConfig?: string
+}
 
+async function runSync({
+  nets: netsFile,
+  check,
+  out,
+  server,
+  runtimeConfig,
+}: RunSyncOptions, runtime: string) {
+  const netSpecs = await resolveNets(netsFile)
   const devnetTempDir = await tempDir(out, "devnet")
-
   const baseUrl = await syncNets(server, devnetTempDir, netSpecs)
-
-  if (importMapFile) {
-    syncFile(importMapFile, (importMap) => {
+  if (runtime === "deno") {
+    runtimeConfig ??= "import_map.json"
+    syncFile(runtimeConfig, (importMap) => {
       importMap.imports["@capi/"] = baseUrl
     })
-  }
-
-  if (packageJsonFile) {
-    syncFile(packageJsonFile, (packageJson) => {
+  } else if (runtime === "node") {
+    runtimeConfig ??= "package.json"
+    syncFile(runtimeConfig, (packageJson) => {
       const addedPackages = new Set()
       for (const rawName of Object.keys(netSpecs ?? {})) {
         const name = normalizePackageName(rawName)

deno.jsonc

@@ -40,7 +40,7 @@
     "cache": "deno task capi serve -- deno cache -r=http://localhost:4646/",
     "check": "deno task capi serve -- deno cache --check",
     "star": "deno task run _tasks/star.ts && deno task check target/star.ts",
-    "sync": "mkdir -p target && deno task capi serve -- deno task capi sync --server http://localhost:4646/ --import-map import_map.json",
+    "sync": "mkdir -p target && deno task capi serve -- deno task capi sync deno --server http://localhost:4646/",
     "run": "deno task capi serve -- deno run -A -r=http://localhost:4646/"
   }
 }

deps/cliffy.ts

@@ -0,0 +1 @@
+export * from "https://deno.land/x/[email protected]/command/mod.ts"

main.ts

@@ -1,13 +1,14 @@
 import "./deps/shims/register.ts"
+import { Command } from "./deps/cliffy.ts"
 
-import bin from "./cli/bin.ts"
-import serve from "./cli/serve.ts"
-import sync from "./cli/sync.ts"
+import { bin } from "./cli/bin.ts"
+import { serve } from "./cli/serve.ts"
+import { sync } from "./cli/sync.ts"
 
-const commands: Record<string, (...args: string[]) => void> = { bin, serve, sync }
-
-if (Deno.args[0]! in commands) {
-  commands[Deno.args[0]!]!(...Deno.args.slice(1))
-} else {
-  throw new Error("Unrecognized command")
-}
+await new Command()
+  .name("capi")
+  .description("Capi is a framework for crafting interactions with Substrate chains")
+  .command("bin", bin)
+  .command("sync", sync)
+  .command("serve", serve)
+  .parse(Deno.args)