Read input program from file

example.gby

@@ -0,0 +1,3 @@
+u8 x;
+
+x <- 1;

lib/main.ts

@@ -1,9 +1,15 @@
+import { promises } from "fs"
 import { compile } from "./compile"
 
-const output = compile(`
-u8 x;
+const { readFile } = promises
 
-x <- 1;
-`)
+if (process.argv.length !== 3) {
+    console.error("usage: gbuoy <program.b>")
+    process.exit(1)
+}
 
-console.log(output)
+const fileName = process.argv[2]
+readFile(fileName, { encoding: "utf-8" }).then(source => {
+    const output = compile(source)
+    console.log(output)
+})

package-lock.json

@@ -8,14 +8,21 @@
       "name": "gbuoy",
       "version": "1.0.0",
       "license": "MIT",
-      "dependencies": {
-        "systemjs": "^6.10.3"
+      "bin": {
+        "gbuoy": "gbuoy.js"
       },
       "devDependencies": {
+        "@types/node": "^16.9.1",
         "peggy": "^1.2.0",
         "typescript": "^4.4.3"
       }
     },
+    "node_modules/@types/node": {
+      "version": "16.9.1",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-16.9.1.tgz",
+      "integrity": "sha512-QpLcX9ZSsq3YYUUnD3nFDY8H7wctAhQj/TFKL8Ya8v5fMm3CFXxo8zStsLAl780ltoYoo1WvKUVGBQK+1ifr7g==",
+      "dev": true
+    },
     "node_modules/peggy": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/peggy/-/peggy-1.2.0.tgz",
@@ -28,11 +35,6 @@
         "node": ">=10"
       }
     },
-    "node_modules/systemjs": {
-      "version": "6.10.3",
-      "resolved": "https://registry.npmjs.org/systemjs/-/systemjs-6.10.3.tgz",
-      "integrity": "sha512-mXwfLJdaADqWg1J5+Z0bGQEdcXSe+ePPTfzffMB29aVls5cXveRl0vneSV/19t3SfuUBsAraLP8W/g5u9cmYXA=="
-    },
     "node_modules/typescript": {
       "version": "4.4.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.4.3.tgz",
@@ -48,17 +50,18 @@
     }
   },
   "dependencies": {
+    "@types/node": {
+      "version": "16.9.1",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-16.9.1.tgz",
+      "integrity": "sha512-QpLcX9ZSsq3YYUUnD3nFDY8H7wctAhQj/TFKL8Ya8v5fMm3CFXxo8zStsLAl780ltoYoo1WvKUVGBQK+1ifr7g==",
+      "dev": true
+    },
     "peggy": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/peggy/-/peggy-1.2.0.tgz",
       "integrity": "sha512-PQ+NKpAobImfMprYQtc4Egmyi29bidRGEX0kKjCU5uuW09s0Cthwqhfy7mLkwcB4VcgacE5L/ZjruD/kOPCUUw==",
       "dev": true
     },
-    "systemjs": {
-      "version": "6.10.3",
-      "resolved": "https://registry.npmjs.org/systemjs/-/systemjs-6.10.3.tgz",
-      "integrity": "sha512-mXwfLJdaADqWg1J5+Z0bGQEdcXSe+ePPTfzffMB29aVls5cXveRl0vneSV/19t3SfuUBsAraLP8W/g5u9cmYXA=="
-    },
     "typescript": {
       "version": "4.4.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.4.3.tgz",

package.json

@@ -1,5 +1,6 @@
 {
   "devDependencies": {
+    "@types/node": "^16.9.1",
     "peggy": "^1.2.0",
     "typescript": "^4.4.3"
   },