All languages 17 working now

backend/src/api.ts

@@ -1,3 +1,5 @@
+"use strict";
+
 import * as fs from "fs";
 import * as pty from "node-pty";
 import { IPty } from "node-pty";
@@ -18,19 +20,27 @@ export class Session {
     this.config = langs[lang];
     this.term = { pty: null, live: false };
     this.code = "";
-    this.ws.send(
-      JSON.stringify({
-        event: "setMonacoLanguage",
-        monacoLanguage: this.config.monacoLang,
-      })
-    );
-    if (this.config.template) {
+    try {
       this.ws.send(
         JSON.stringify({
-          event: "insertTemplate",
-          template: this.config.template,
+          event: "setMonacoLanguage",
+          monacoLanguage: this.config.monacoLang,
         })
       );
+    } catch (err) {
+      //
+    }
+    if (this.config.template) {
+      try {
+        this.ws.send(
+          JSON.stringify({
+            event: "insertTemplate",
+            template: this.config.template,
+          })
+        );
+      } catch (err) {
+        //
+      }
     }
     this.run().catch(console.error);
     ws.on("message", this.handleClientMessage);
@@ -67,12 +77,16 @@ export class Session {
     }
   };
   run = async () => {
-    const { repl, file, suffix, compile, run } = this.config;
+    const { repl, main, suffix, compile, run, hacks } = this.config;
     if (this.term.pty) {
       this.term.pty.kill();
       this.term.live = false;
     }
-    this.ws.send(JSON.stringify({ event: "terminalClear" }));
+    try {
+      this.ws.send(JSON.stringify({ event: "terminalClear" }));
+    } catch (err) {
+      //
+    }
     const tmpdir: string = await new Promise((resolve, reject) =>
       tmp.dir({ unsafeCleanup: true }, (err, path) => {
         if (err) {
@@ -84,14 +98,14 @@ export class Session {
     );
     let cmdline: string;
     if (!run) {
-      cmdline = `echo 'Support for ${this.config.name} is not yet implemented.`;
+      cmdline = `echo 'Support for ${this.config.name} is not yet implemented.'`;
     } else if (this.code) {
       let code = this.code;
       if (suffix) {
         code += suffix;
       }
       await new Promise((resolve, reject) =>
-        fs.writeFile(path.resolve(tmpdir, file), code, (err) => {
+        fs.writeFile(path.resolve(tmpdir, main), code, (err) => {
           if (err) {
             reject(err);
           } else {
@@ -108,6 +122,30 @@ export class Session {
     } else {
       return;
     }
+    if (hacks && hacks.includes("ghci-config") && run) {
+      if (this.code) {
+        const contents = ":load Main\nmain\n";
+        await new Promise((resolve, reject) => {
+          fs.writeFile(path.resolve(tmpdir, ".ghci"), contents, (err) => {
+            if (err) {
+              reject(err);
+            } else {
+              resolve();
+            }
+          });
+        });
+      } else {
+        await new Promise((resolve, reject) =>
+          fs.unlink(path.resolve(tmpdir, ".ghci"), (err) => {
+            if (err && err.code !== "ENOENT") {
+              reject(err);
+            } else {
+              resolve();
+            }
+          })
+        );
+      }
+    }
     const term = {
       pty: pty.spawn("bash", ["-c", cmdline], {
         name: "xterm-color",
@@ -121,7 +159,13 @@ export class Session {
       // Capture term in closure so that we don't keep sending output
       // from the old pty even after it's been killed (see ghci).
       if (term.live) {
-        this.ws.send(JSON.stringify({ event: "terminalOutput", output: data }));
+        try {
+          this.ws.send(
+            JSON.stringify({ event: "terminalOutput", output: data })
+          );
+        } catch (err) {
+          //
+        }
       }
     });
   };

backend/src/langs.ts

@@ -1,28 +1,32 @@
+"use strict";
+
 export interface LangConfig {
   name: string;
   monacoLang: string;
   repl?: string;
-  file?: string;
+  main?: string;
   prefix?: string;
   suffix?: string;
   compile?: string;
   run?: string;
   template?: string;
+  hacks?: "ghci-config"[];
 }
 
 export const langs: { [key: string]: LangConfig } = {
   bash: {
     name: "Bash",
     monacoLang: "shell",
-    repl: "bash",
-    file: "main.bash",
+    repl: "bash --rcfile /dev/null",
+    main: "main.bash",
     run: "bash --rcfile main.bash",
-    template: 'echo "Hello, world!"',
+    template: `echo "Hello, world!"
+`,
   },
   c: {
     name: "C",
     monacoLang: "c",
-    file: "main.c",
+    main: "main.c",
     compile: "clang -Wall -Wextra main.c -o main",
     run: "./main",
     template: `#include <stdio.h>
@@ -36,81 +40,167 @@ int main() {
   "c++": {
     name: "C++",
     monacoLang: "cpp",
+    main: "main.cpp",
+    compile: "clang++ -Wall -Wextra main.cpp -o main",
+    run: "./main",
+    template: `#include <iostream>
+
+int main() {
+  std::cout << "Hello, world!" << std::endl;
+  return 0;
+}
+`,
   },
   clojure: {
     name: "Clojure",
     monacoLang: "clojure",
     repl: "clojure",
+    main: "main.clj",
+    run: "clojure -i main.clj -r",
+    template: `(println "Hello, world!")
+`,
   },
   emacs: {
     name: "Emacs Lisp",
     monacoLang: "plaintext",
-    repl: "emacs",
+    repl: "emacs --eval '(ielm)'",
+    main: "main.el",
+    run: "emacs --load main.el --eval '(ielm)'",
+    template: `(message "Hello, world!")
+`,
   },
   fish: {
     name: "Fish",
     monacoLang: "plaintext",
     repl: "SHELL=/usr/bin/fish fish",
+    main: "main.fish",
+    run: 'fish -C "$(< main.fish)"',
+    template: `echo "Hello, world!"
+`,
   },
   go: {
     name: "Go",
     monacoLang: "go",
+    main: "main.go",
+    compile: "go build main.go",
+    run: "./main",
+    template: `package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("Hello, world!")
+}
+`,
   },
   haskell: {
     name: "Haskell",
     monacoLang: "plaintext",
     repl: "ghci",
-    file: "Main.hs",
-    run: "ghci Main.hs",
+    main: "Main.hs",
+    run: "ghci",
+    template: `module Main where
+
+main :: IO ()
+main = putStrLn "Hello, world!"
+`,
+    hacks: ["ghci-config"],
   },
   java: {
     name: "Java",
     monacoLang: "java",
+    main: "Main.java",
+    compile: "javac Main.java",
+    run: "java Main",
+    template: `public class Main {
+    public static void main(String[] args) {
+        System.out.println("Hello, world!");
+    }
+}
+`,
   },
   julia: {
     name: "Julia",
     monacoLang: "plaintext",
     repl: "julia",
+    main: "main.jl",
+    run: "julia -L main.jl",
+    template: `println("Hello, world!")
+`,
   },
   lua: {
     name: "Lua",
     monacoLang: "lua",
     repl: "lua",
+    main: "main.lua",
+    run: "lua -i main.lua",
+    template: `print("Hello, world!")
+`,
   },
   nodejs: {
     name: "Node.js",
     monacoLang: "javascript",
     repl: "node",
-    file: "main.js",
-    suffix: '\n;require("repl").start();',
+    main: "main.js",
+    suffix: `
+require("repl").start();
+`,
     run: "node main.js",
+    template: `console.log("Hello, world!")
+`,
   },
   python: {
     name: "Python",
     monacoLang: "python",
     repl: "python3 -u",
-    file: "main.py",
+    main: "main.py",
     run: "python3 -u -i main.py",
+    template: `print("Hello, world!")
+`,
   },
   ruby: {
     name: "Ruby",
     monacoLang: "ruby",
     repl: "irb",
+    main: "main.rb",
+    suffix: `
+require 'irb'
+IRB.setup(ARGV[0], argv: [])
+workspace = IRB::WorkSpace.new(binding)
+binding_irb = IRB::Irb.new(workspace)
+binding_irb.run(IRB.conf)
+`,
+    run: "ruby main.rb",
+    template: `puts "Hello, world!"
+`,
   },
   rust: {
     name: "Rust",
     monacoLang: "rust",
+    main: "main.rs",
+    compile: "rustc main.rs",
+    run: "./main",
+    template: `fn main() {
+    println!("Hello, world!");
+}
+`,
   },
   vim: {
     name: "Vimscript",
     monacoLang: "plaintext",
     repl: "vim",
+    main: "main.vim",
+    run: `vim -c "$(< main.vim)"`,
+    template: `:echo "Hello, world!"
+`,
   },
   zsh: {
     name: "Zsh",
     monacoLang: "shell",
     repl: "SHELL=/usr/bin/zsh zsh",
-    file: ".zshrc",
+    main: ".zshrc",
     run: "ZDOTDIR=. zsh",
+    template: `echo "Hello, world!"
+`,
   },
 };

backend/src/server.ts

@@ -1,3 +1,5 @@
+"use strict";
+
 import * as appRoot from "app-root-path";
 import * as express from "express";
 import { Request } from "express";
@@ -23,6 +25,9 @@ app.use(sslRedirect());
 app.get("/", (_, res) => {
   res.sendFile(appRoot.path + "/frontend/pages/index.html");
 });
+app.get("/cpp", (_, res) => {
+  res.redirect("/c++");
+});
 app.get("/:lang", (req, res) => {
   if (langs[req.params.lang]) {
     res.sendFile(appRoot.path + "/frontend/pages/app.html");

frontend/src/app.ts

@@ -1,3 +1,5 @@
+"use strict";
+
 import * as monaco from "monaco-editor";
 import { Terminal } from "xterm";
 import { FitAddon } from "xterm-addon-fit";
@@ -24,10 +26,9 @@ function tryConnect() {
   socket = new WebSocket(
     (document.location.protocol === "http:" ? "ws://" : "wss://") +
       document.location.host +
-      `/api/v1/ws?lang=${lang}`
+      `/api/v1/ws?lang=${encodeURIComponent(lang)}`
   );
   socket.addEventListener("open", () => {
-    retryDelayMs = initialRetryDelayMs;
     console.log("Successfully connected to server");
   });
   socket.addEventListener("message", (event: MessageEvent) => {
@@ -38,6 +39,9 @@ function tryConnect() {
       console.error("Malformed message from server:", event.data);
       return;
     }
+    if (message?.event && message?.event !== "error") {
+      retryDelayMs = initialRetryDelayMs;
+    }
     switch (message?.event) {
       case "terminalClear":
         term.reset();