main: work in progress [might break]

buildroot-v86/board/v86/rootfs_overlay/root/.profile

@@ -9,7 +9,7 @@ alias mg='echo "HINT: type Ctrl+c Ctrl-x to quit";read;me';
 alias nano='echo "HINT: type Ctrl+x to quit"       ;read;nano'; 
 
 # start index.js
-test -f index.js && chmod +x index.js && ./index.js
+test -f index.js && chmod +x index.js && ./index.js | grep -v undefined
 
 # start index.html
 test -f index.html && chmod +x index.html && ./index.html

buildroot-v86/board/v86/rootfs_overlay/root/bin/codemirror

@@ -0,0 +1,3 @@
+#!/bin/sh
+cat lib/aframe/codemirror.js             > /dev/browser/js
+echo '<a-entity codemirror></a-entity>' >> /dev/browser/html 

buildroot-v86/board/v86/rootfs_overlay/root/foo

@@ -1 +0,0 @@
-bar

buildroot-v86/board/v86/rootfs_overlay/root/lib/aframe/codemirror.js

@@ -0,0 +1,120 @@
+if( AFRAME.components.codemirror ) delete AFRAME.components.codemirror 
+
+AFRAME.registerComponent('codemirror', {
+  schema: { 
+    foo: { type:"string"}
+  },
+
+  init: function () {
+    this.el.object3D.visible = false
+    //this.el.innerHTML = ` `
+    this.requireAll()
+  },
+
+  requireAll: async function(){
+    let s = await AFRAME.utils.require(this.requires)
+    setTimeout( () => this.el.setAttribute("dom",""), 300 )
+  },
+
+  requires:{
+    window:        "com/window.js",
+    codemirror:    "https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.58.1/codemirror.js",
+    codemirrorcss: "https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.35.0/codemirror.css",
+    cmtheme:       "https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.35.0/theme/shadowfox.css"
+  },
+
+  dom: {
+    scale:   0.5,
+    events:  ['click','keydown'],
+    html:    (me) => `<div class="codemirror">
+                      </div>`,
+
+    css:     (me) => `.codemirror{
+                        width:100%;
+                     }
+                     .wb-body + .codemirror{ overflow:hidden; }
+                     .CodeMirror {
+                      margin-top:18px;
+                     }
+                     .cm-s-shadowfox.CodeMirror {
+                       background:transparent !important; 
+                     }
+                     `
+  },
+
+  events:{
+
+    // component events
+    DOMready: function(e){
+      console.log(`title: codemirror; uid: ${this.el.dom.id}; attach: #overlay; dom: #${this.el.dom.id};`)
+      this.el.setAttribute("window", `title: codemirror; uid: ${this.el.dom.id}; attach: #overlay; dom: #${this.el.dom.id};`)
+      this.editor = CodeMirror( this.el.dom, {
+        value: "function myScript(){return 100;}\n",
+        mode:  "javascript",
+        lineNumbers: true,
+        styleActiveLine: true,
+        matchBrackets: true,
+        Tab: "indentMore",
+        defaultTab: function(cm) {
+          if (cm.somethingSelected()) cm.indentSelection("add");
+          else cm.replaceSelection("  ", "end");
+        }
+      })
+      this.editor.setOption("theme", "shadowfox")
+    },
+  },
+
+
+  manifest: { // HTML5 manifest to identify app to xrsh
+    "short_name": "Paste",
+    "name": "Paste",
+    "icons": [
+      {
+        "src": "https://css.gg/clipboard.svg",
+        "type": "image/svg+xml",
+        "sizes": "512x512"
+      }
+    ],
+    "id": "/?source=pwa",
+    "start_url": "/?source=pwa",
+    "background_color": "#3367D6",
+    "display": "standalone",
+    "scope": "/",
+    "theme_color": "#3367D6",
+    "shortcuts": [
+      {
+        "name": "What is the latest news?",
+        "cli":{
+          "usage":  "helloworld <type> [options]",
+          "example": "helloworld news",
+          "args":{
+            "--latest": {type:"string"}
+          }
+        },
+        "short_name": "Today",
+        "description": "View weather information for today",
+        "url": "/today?source=pwa",
+        "icons": [{ "src": "/images/today.png", "sizes": "192x192" }]
+      }
+    ],
+    "description": "Paste the clipboard",
+    "screenshots": [
+      {
+        "src": "/images/screenshot1.png",
+        "type": "image/png",
+        "sizes": "540x720",
+        "form_factor": "narrow"
+      }
+    ],
+    "help":`
+Helloworld application 
+
+This is a help file which describes the application.
+It will be rendered thru troika text, and will contain
+headers based on non-punctualized lines separated by linebreaks,
+in above's case "\nHelloworld application\n" will qualify as header.
+    `
+  }
+
+});
+

nix/chibicc.nix

@@ -0,0 +1,23 @@
+{ pkgs ? import <nixpkgs> {} }:
+
+pkgs.mkShell {
+  buildInputs = [
+    pkgs.pkg-config
+    pkgs.gnumake  # For running make
+    pkgs.gcc_multi # GCC with multi-lib support (32-bit and 64-bit)
+    pkgs.glibc_multi
+    pkgs.gccMultiStdenv
+    pkgs.binutils
+  ];
+
+  # Set up environment variables for cross-compilation to 32-bit
+  shellHook = ''
+    export CC="gcc -m32 -static"
+    export CXX="g++ -m32 -static"
+    export LD="ld -m elf_i386"
+    echo "32-bit cross-compilation environment with static linking is set up."
+    git clone https://github.com/rui314/chibicc
+    cd chibicc
+    make
+  '';
+}

nix/configuration.nix

@@ -0,0 +1,43 @@
+# /etc/nixos/configuration.nix
+{ config, pkgs, ... }:
+
+{
+  # Set the hostname of the system
+  networking.hostName = "nixos-minimal"; 
+
+  # Enable the OpenSSH service (optional, useful for remote access)
+  services.openssh.enable = false;
+
+  # Timezone configuration
+  time.timeZone = "UTC";
+
+  # Set the default shell to bash
+  users.defaultUserShell = pkgs.bash;
+
+  # Create a minimal user (replace "your-user" with desired username)
+  users.users.yourUser = {
+    isNormalUser = true;
+    shell = pkgs.bash;
+    initialPassword = "password";  # Replace with a hashed password for production
+  };
+
+  # Boot loader (for booting the system)
+  boot.loader.grub.enable = true;
+  boot.loader.grub.version = 2;
+  boot.loader.grub.devices = [ "/dev/sda" ]; # Replace with your actual boot device
+
+  # Allow unfree packages (if needed)
+  nixpkgs.config.allowUnfree = true;
+
+  # Enable virtual console
+  console.useXkbConfig = true;
+
+  # Enable bash as a package (part of the basic system environment)
+  environment.systemPackages = with pkgs; [
+    bash
+  ];
+
+  # Disable the display manager (minimal CLI system, no graphical interface)
+  services.xserver.enable = false;
+}
+

nix/cross.nix

@@ -0,0 +1,12 @@
+let
+  nixpkgs = fetchTarball "https://github.com/NixOS/nixpkgs/tarball/release-24.05";
+  pkgs = (import nixpkgs {}).pkgsCross.i686-embedded;
+in
+
+# callPackage is needed due to https://github.com/NixOS/nixpkgs/pull/126844
+pkgs.pkgsStatic.callPackage ({ mkShell, zlib, pkg-config, file }: mkShell {
+  # these tools run on the build platform, but are configured to target the host platform
+  nativeBuildInputs = [ pkg-config file ];
+  # libraries needed for the host platform
+  buildInputs = [ zlib ];
+}) {}

nix/hello.c

@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+int main (void)
+{
+  printf ("Hello, world!\n");
+  return 0;
+}

nix/run.sh

@@ -0,0 +1 @@
+nix-shell -p qemu --run 'qemu-system-i386 -cdrom dist/v86-linux.iso'