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autoreload.js
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autoreload.js
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//
// node.js auto reload module
// by Shimon Doodkin.
// license: 2 close BSD.
//
var path = require('path');
var fs = require('fs');
var loadmoduletimer={};
var trackedfiles={}; exports.trackedfiles=trackedfiles;
this.path=__dirname;
// note: there is an upcomming version of node
// with auto reload modules probably it will be integrated in the near future.
//
// also every time you reload a module it does not free the memory of the reviews module.
// it means that reloading modules sutes fine for development,
// but do not relay on havy use of it for production.
function loadlater( filename , callback )
{
console.log((new Date).toString()+' will load file: '+filename);
return setTimeout(function ()
{
console.log((new Date).toString()+' loading file: '+filename);
fs.readFile(filename, function (err, content)
{
if (err) throw err; // need to add better error handling
try
{
var dirname = path.dirname(filename);
// create wrapper function
var wrapper = "(function (exports, require, module, __filename, __dirname) { "
+ content
+ "\n});";
var compiledWrapper = process.compile(wrapper, filename);
var newmodule={};
compiledWrapper.apply(newmodule, [newmodule, require, newmodule, filename, dirname]);
callback(newmodule);
}
catch(err)
{
if (err)
{
console.log(err.message);
console.log(err.stack);
}
//if (err) throw err; // need to add better error handling
}
});
}, 500); // sometimes i had a situation when the watchFile callback called while uploading the file and resulted in error.
} exports.loadlater=loadlater;
function watch()
{
var watchfilename,filename,callback;
if(arguments.length==3)
{
watchfilename=arguments[0];
filename=arguments[1];
callback=arguments[2];
}
else
{
watchfilename=arguments[0];
filename=arguments[0];
callback=arguments[1];
}
if(typeof watchfilename=='string') watchfilename=[watchfilename];
console.log((new Date).toString()+' watch reaload file: '+filename);
trackedfiles[filename]=true;
var functionload=function()
{
if(loadmoduletimer[filename])
{
console.log((new Date).toString()+'timeout cleaned - will load file: '+filename);
clearTimeout(loadmoduletimer[filename]);
}
loadmoduletimer[filename] =
loadlater( filename ,callback);
};
for(var i=0;i<watchfilename.length;i++)
fs.watchFile(watchfilename[i], functionload);
};exports.watch=watch;
function watchrel()
{
var watchfilename,filename,callback;
if(arguments.length==3)
{
watchfilename=arguments[0];
filename=arguments[1];
callback=arguments[2];
}
else
{
watchfilename=arguments[0];
filename=arguments[0];
callback=arguments[1];
}
for(var i=0;i<watchfilename.length;i++)
watchfilename[i]=this.path+'/'+watchfilename[i];
watch(watchfilename,filename,callback);
};
exports.watchrel=watchrel;
function calllater( filename , callback )
{
console.log((new Date).toString()+' will call file: '+filename);
return setTimeout(function ()
{
console.log((new Date).toString()+' calling file: '+filename);
callback(filename);
}, 500); // sometimes i had a situation when the watchFile callback called while uploading the file and resulted in error.
} exports.calllater=calllater;
function watchonly()
{
var watchfilename,filename,callback;
if(arguments.length==3)
{
watchfilename=arguments[0];
filename=arguments[1];
callback=arguments[2];
}
else
{
watchfilename=arguments[0];
filename=arguments[0];
callback=arguments[1];
}
if(typeof watchfilename=='string') watchfilename=[watchfilename];
console.log((new Date).toString()+' watch only file: '+filename);
trackedfiles[filename]=true;
var callfunction=function ()
{
if(loadmoduletimer[filename])
{
console.log((new Date).toString()+'timeout cleaned - will load file: '+filename);
clearTimeout(loadmoduletimer[filename]);
}
loadmoduletimer[filename] =
calllater( filename ,callback);
};
for(var i=0;i<watchfilename.length;i++)
fs.watchFile(watchfilename[i], callfunction);
};exports.watchonly=watchonly;