nesh/lib/plugins/require.js

An enhanced, extensible shell for Node.js

// Generated by CoffeeScript 1.11.1
(function() {
  var __doc__, colors, displayUsage, fs, optimist, vm;

  __doc__ = "Shorthand for requiring and assigning a module\n\n.require colors -> colors = require('colors')\n.require ./User -> User = require('./User')\n.require ./model/User -> User = require('./model/User')\n.require use-global-fibrous -> useGlobalFibrous = require('use-global-fibrous')\n.require lodash-node/modern/objects -> objects = require('lodash-node/modern/objects')\n\nIf the `require` is successful, the name of the variable that the module\nhas been assigned to will be pre-filled into the REPL as the next\nline of input. This behavior can be disabled with the command-line\nargument `--no-require-echo`.\n";

  colors = require('colors');

  optimist = require('optimist');

  vm = require('vm');

  fs = require('fs');

  displayUsage = function(repl) {
    repl.outputStream.write(colors.cyan("Usage: .require <unquoted-module-name-or-path> [assign-to]\n"));
    return repl.displayPrompt();
  };

  exports.postStart = function(context) {
    var action, exec, repl;
    repl = context.repl;
    exec = function(s) {
      if (repl.useGlobal) {
        return vm.runInThisContext(s);
      } else {
        return vm.runInContext(s, repl.context);
      }
    };
    action = function(m) {
      var c, capNext, e, e2, expanded, i, len, ok, tokens, vName;
      if (m.trim().length === 0) {
        displayUsage(repl);
        return;
      }
      if (/^[\.\/]+$/.test(m)) {
        m = fs.realpathSync(process.cwd() + "/" + m);
      }
      tokens = m.split(/\s+/);
      if (tokens.length > 2) {
        displayUsage(repl);
        return;
      } else if (tokens.length === 2) {
        vName = tokens[1];
        m = tokens[0];
      } else {
        vName = "";
        capNext = false;
        for (i = 0, len = m.length; i < len; i++) {
          c = m[i];
          if (c === '/') {
            vName = "";
          } else if (c === '-') {
            capNext = true;
          } else if (c === '.') {

          } else {
            if (capNext) {
              vName += c.toUpperCase();
            } else {
              vName += c;
            }
            capNext = false;
          }
        }
      }
      expanded = vName + " = require(" + (JSON.stringify(m)) + ")";
      repl.outputStream.write(colors.green(expanded + "\n"));
      ok = true;
      try {
        exec(expanded);
      } catch (error) {
        e = error;
        ok = false;
        try {
          if (m.slice(0, 2) !== "./") {
            action("./" + m);
          } else {
            throw e;
          }
        } catch (error) {
          e2 = error;
          ok = false;
          repl.outputStream.write(colors.red(".require: " + e + "\n"));
        }
      }
      repl.displayPrompt();
      if (ok && optimist.argv['require-echo'] !== false) {
        return repl.rli.write(vName);
      }
    };
    return repl.defineCommand('require', {
      help: "Require a module and assign it to a variable with the same name",
      action: action
    });
  };

}).call(this);

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