Bash PhantomJS REPL modeled after https://github.com/sotownsend/BooJS

phantomjs-repl.sh

#!/usr/bin/env bash
 
### Repl Usage:
#
#  $ ./phantomjs-repl.sh
#  > missing
#  ReferenceError: Can't find variable: missing
#  > window
#  [object Window]
#  > console.log('Hello')
#  Hello
#  undefined
#  > !jquery-1.11.2.min.js
#  Loading jquery-1.11.2.min.js ... done
#  > $('<span>Hello</span>').text()
#  Hello
#  > ^C
#  
### Pipes!
#
#  $ echo 'console.log("Hello")' | ./phantomjs-repl.sh -
#  Hello
#  undefined
 
tmpfile=$(mktemp /tmp/pr-XXXXX)

cat <<EOF >> $tmpfile
var __system = require("system");

phantom.onError = function(msg, trace) {
  __system.stderr.writeLine(msg);
  phantom.exit(1);
};

var __loadfile = function(filename) {
  __system.stdout.write("Loading " + filename + " ... ");
  if (phantom.injectJs(filename)) {
    __system.stdout.write("done\n");
  } else {
    __system.stdout.write("failed\n");;
  }
};

var __repl = function() {
  while (1) {
    if ("$1" !== '-') {
      __system.stdout.write("> ");
    }
    var line = __system.stdin.readLine();
    if (!line.length && "$1" === '-') {
      break;
    } 
    if (line[0] === "!" && line.length > 1) {
      __loadfile(line.slice(1));
    } else {
      try {
        var value = eval(line);
        if (value === void(0)) {
          value = "undefined";
        }
        __system.stdout.writeLine(value); 
      } catch (e) {
        __system.stdout.writeLine(e); 
      }
    }
  }
};

__repl();
phantom.exit(0);
EOF
 
phantomjs $tmpfile