Add compile jack comand to cli (#459)

* Add compile jack comand to cli

cli/src/index.ts

@@ -1,9 +1,13 @@
 #!/usr/bin/env node
-import { dirname, parse, resolve } from "path";
+import path, { dirname, parse, resolve } from "path";
 import yargs from "yargs";
 import { hideBin } from "yargs/helpers";
 import { main } from "./grading.js";
 import { testRunner } from "./testrunner.js";
+import { NodeFileSystemAdapter } from "@davidsouther/jiffies/lib/esm/fs_node.js";
+import { FileSystem } from "@davidsouther/jiffies/lib/esm/fs.js";
+import * as fsCore from "fs";
+import { compile } from "@nand2tetris/simulator/jack/compiler.js";
 
 yargs(hideBin(process.argv))
   .usage("$0 <cmd>")
@@ -74,6 +78,96 @@ yargs(hideBin(process.argv))
       }
     },
   )
+  .command(
+    "compile <src> [dst]",
+    "Compile .jack files inside a folder",
+    (yargs) =>
+      yargs
+        .positional("src", {
+          type: "string",
+          describe: "Path to input folder with jack files",
+        })
+        .option("dst", {
+          type: "string",
+          describe: "Path to destination folder",
+          default: "",
+        })
+        .coerce(["src", "dst"], function (arg) {
+          return path.resolve(arg) + "/";
+        })
+        .check((argv, options) => {
+          const src = argv.src;
+          const dst = argv.dst;
+          if (src === undefined) {
+            throw Error("Please provide input folder path");
+          }
+
+          if (dst && !fsCore.lstatSync(dst).isDirectory()) {
+            throw Error(src + " is not a folder");
+          }
+          if (!fsCore.lstatSync(src).isDirectory()) {
+            throw Error(src + " is not a folder");
+          }
+
+          return true;
+        })
+        .showHelpOnFail(false, "Specify --help for available options"),
+    async (argv) => {
+      enum Colors {
+        Red = "\x1b[31m",
+        Green = "\x1b[32m",
+        Reset = "\u001b[0m",
+      }
+      const JACK_EXT = ".jack";
+      const src = argv.src;
+      const dst = argv.dst ?? src;
+      if (src === undefined) {
+        throw Error("Please provde input folder path");
+      }
+
+      if (dst === undefined) {
+        throw Error("Please provde input folder path");
+      }
+      const fs = new FileSystem(new NodeFileSystemAdapter());
+
+      const files = await fs.readdir(src);
+      const jackFiles = files.filter((file) => file.endsWith(JACK_EXT));
+      if (jackFiles.length === 0) {
+        throw Error("No jack files inside a folder");
+      }
+      const nameToContent = {} as Record<string, string>;
+      for (const file of jackFiles) {
+        const filepath = path.join(src, file);
+        const content = await fs.readFile(filepath);
+        nameToContent[file.replace(JACK_EXT, "")] = content;
+      }
+      let error = false;
+      for (const [name, compiled] of Object.entries(compile(nameToContent))) {
+        if (typeof compiled === "string") {
+          const outputFilename = name + ".vm";
+          const outpath = path.join(dst, outputFilename);
+          await fs.writeFile(outpath, compiled);
+        } else {
+          if (!error) {
+            console.error("Compilation failed\n");
+          }
+          console.error(
+            Colors.Red +
+              compiled.message.replace(
+                /Line\s([\d]+):/g,
+                name + ".jack:$1" + Colors.Reset,
+              ),
+          );
+          error = true;
+        }
+      }
+      if (error) {
+        process.exit(1);
+      } else {
+        console.log(Colors.Green + "Compiled files" + Colors.Reset);
+      }
+    },
+  )
   .help()
   .demandCommand(1)
   .parse();