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TiddlyWiki5/core/modules/commander.js
Jermolene 5b3b62f93d Fix bug handling of build command
We were taking the commands expanded from the build targets and placing
them at the end of the queue. That caused a problem whereby the
prevailing output folder was always the last one in the command token
list.

Now we splice the new commands into the command token list at the
current position.
2014-06-24 12:09:10 +01:00

124 lines
3.1 KiB
JavaScript

/*\
title: $:/core/modules/commander.js
type: application/javascript
module-type: global
The $tw.Commander class is a command interpreter
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
/*
Parse a sequence of commands
commandTokens: an array of command string tokens
wiki: reference to the wiki store object
streams: {output:, error:}, each of which has a write(string) method
callback: a callback invoked as callback(err) where err is null if there was no error
*/
var Commander = function(commandTokens,callback,wiki,streams) {
var path = require("path");
this.commandTokens = commandTokens;
this.nextToken = 0;
this.callback = callback;
this.wiki = wiki;
this.streams = streams;
this.outputPath = path.resolve($tw.boot.wikiPath,$tw.config.wikiOutputSubDir);
};
/*
Add a string of tokens to the command queue
*/
Commander.prototype.addCommandTokens = function(commandTokens) {
var params = commandTokens.slice(0);
params.unshift(0);
params.unshift(this.nextToken);
Array.prototype.splice.apply(this.commandTokens,params);
};
/*
Execute the sequence of commands and invoke a callback on completion
*/
Commander.prototype.execute = function() {
this.executeNextCommand();
};
/*
Execute the next command in the sequence
*/
Commander.prototype.executeNextCommand = function() {
var self = this;
// Invoke the callback if there are no more commands
if(this.nextToken >= this.commandTokens.length) {
this.callback(null);
} else {
// Get and check the command token
var commandName = this.commandTokens[this.nextToken++];
if(commandName.substr(0,2) !== "--") {
this.callback("Missing command");
} else {
commandName = commandName.substr(2); // Trim off the --
// Accumulate the parameters to the command
var params = [];
while(this.nextToken < this.commandTokens.length &&
this.commandTokens[this.nextToken].substr(0,2) !== "--") {
params.push(this.commandTokens[this.nextToken++]);
}
// Get the command info
var command = $tw.commands[commandName],
c,err;
if(!command) {
this.callback("Unknown command: " + commandName);
} else {
if(this.verbose) {
this.streams.output.write("Executing command: " + commandName + " " + params.join(" ") + "\n");
}
if(command.info.synchronous) {
// Synchronous command
c = new command.Command(params,this);
err = c.execute();
if(err) {
this.callback(err);
} else {
this.executeNextCommand();
}
} else {
// Asynchronous command
c = new command.Command(params,this,function(err) {
if(err) {
self.callback(err);
} else {
self.executeNextCommand();
}
});
err = c.execute();
if(err) {
this.callback(err);
}
}
}
}
}
};
Commander.initCommands = function(moduleType) {
moduleType = moduleType || "command";
$tw.commands = {};
$tw.modules.forEachModuleOfType(moduleType,function(title,module) {
var c = $tw.commands[module.info.name] = {};
// Add the methods defined by the module
for(var f in module) {
if($tw.utils.hop(module,f)) {
c[f] = module[f];
}
}
});
};
exports.Commander = Commander;
})();