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1
| 'use strict';
var fs = require('fs');
var path = require('path');
var join = path.join;
var dirname = path.dirname;
var extname = path.extname;
var requires = require('requires');
var Class = require('arale').Class;
var Events = require('arale').Events;
var debug = require('debug')('father:package');
// config an extension as key, when that extension is found, value will be added to deps
var extraDeps = {
handlebars: 'handlebars'
};
var Package = Class.create({
Implements: [Events],
initialize: function(dir, father) {
if (father) {
this.father = father;
} else {
this.packages = {};
}
this.dest = dir;
this._dependencies = [];
var keys = ['name', 'version', 'main', 'origin', 'dependencies', 'files', 'output'];
this._exportProperty(keys);
},
_parse: function() {
debug('start parse %s', this.dest);
this._running = true;
var Self = this.constructor;
var pkg = this._pkg = this.readPackage();
debug('pkg(%s) id %s', pkg.id, pkg.id);
this.id = pkg.id;
Object.keys(pkg.dependencies)
.forEach(function(name) {
var sub = pkg.dependencies[name];
if (!this.get(sub.id)) {
this.set(new Self(sub.dest, this)._parse());
}
this._dependencies.push(sub.id);
}.bind(this));
debug('pkg(%s) dependencies [%s]', this.id, Object.keys(pkg.dependencies));
this._parseFiles();
debug('end parse %s', this.dest);
this._parsed = true;
this._running = false;
return this;
},
_parseFiles: function() {
var that = this, dest = this.dest;
var pkg = this._pkg, files = pkg.files = {};
// base on pkg.main
lookupFiles(pkg.main);
// base on pkg.output
Eif (Array.isArray(pkg.output)) {
pkg.output.forEach(lookupFiles);
}
function lookupFiles(src) {
extname(src) || (src = src + '.js');
if (!files[src]) {
var data;
try {
data = fs.readFileSync(join(dest, src));
} catch(e) {
that.trigger('notfound', src);
return [];
}
var req = requires(data)
.reduce(function(previous, current) {
var path = current.path;
previous.push(path.replace(/\.js$/, ''));
// extension in extraDeps will be added to deps
var ext = extname(path).substring(1);
if (extraDeps[ext]) {
previous.push(extraDeps[ext]);
}
return previous;
}, []);
req
.slice()
.filter(function(item) {
return item.charAt(0) === '.';
})
.forEach(function(item) {
item = join(dirname(src), item);
req = req.concat(lookupFiles(item));
});
var deps = req.filter(function(item, index, arr) {
return index === arr.indexOf(item);
});
files[src] = {
dependencies: deps
};
debug('pkg(%s) file %s, deps %s', pkg.id, src, deps);
}
return req || [];
}
},
set: function(pkg) {
if (this.father) {
return this.father.set(pkg);
}
Eif (!this.packages[pkg.id]) {
this.packages[pkg.id] = pkg;
}
},
get: function(id) {
if (this.father) {
return this.father.get(id);
}
Iif (!this._parsed && !this._running) this._parse();
return id === this.id ? this : this.packages[id];
},
_exportProperty: function(keys) {
var that = this;
keys.forEach(function(key) {
Object.defineProperty(that, key, {
get: function() {
if (!that._parsed && !that._running) that._parse();
if (key === 'dependencies') {
var deps = {};
that._dependencies.forEach(function(id) {
var pkg = that.get(id);
deps[pkg.name] = pkg;
});
return deps;
} else {
var pkg = that.get(that.id);
return pkg ? pkg._pkg[key] : '';
}
},
configurable: true
});
});
},
/*
Method below can be overridden
*/
readPackage: function() {}
});
module.exports = Package;
|