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index.js
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index.js
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var cp = require('child_process'), spawn = cp.spawn, exec = cp.exec;
var sysPath = require('path');
var progeny = require('progeny');
var libsass = require('node-sass');
var Promise = require('promise');
var os = require('os');
var isWindows = os.platform() === 'win32';
var compassRe = /compass/;
var sassRe = /\.sass$/;
var extend = function(object, source) {
for (var key in source) object[key] = source[key];
return object;
};
function SassCompiler(cfg) {
if (cfg == null) cfg = {};
this.rootPath = cfg.paths.root;
this.optimize = cfg.optimize;
this.config = (cfg.plugins && cfg.plugins.sass) || {};
this.mode = this.config.mode;
if (this.config.options != null && this.config.options.includePaths != null) {
this.includePaths = this.config.options.includePaths;
}
this.getDependencies = progeny({
rootPath: this.rootPath,
altPaths: this.includePaths,
reverseArgs: true
});
this.seekCompass = progeny({
rootPath: this.rootPath,
exclusion: '',
potentialDeps: true
});
this.gem_home = this.config.gem_home;
this.env = {};
if (this.gem_home) {
var env = extend({}, process.env);
env.GEM_HOME = this.gem_home;
this.env = {
env: env
};
this._bin = this.gem_home + "/bin/" + this._bin;
this._compass_bin = this.gem_home + "/bin/" + this._compass_bin;
}
this.bundler = this.config.useBundler;
this.prefix = this.bundler ? 'bundle exec ' : '';
}
SassCompiler.prototype.brunchPlugin = true;
SassCompiler.prototype.type = 'stylesheet';
SassCompiler.prototype.extension = 'scss';
SassCompiler.prototype.pattern = /\.s[ac]ss$/;
SassCompiler.prototype._bin = isWindows ? 'sass.bat' : 'sass';
SassCompiler.prototype._compass_bin = isWindows ? 'compass.bat' : 'compass';
SassCompiler.prototype._checkRuby = function() {
var prefix = this.prefix;
var env = this.env;
var sassCmd = this.prefix + this._bin + " --version";
var compassCmd = this.prefix + this._compass_bin + " --version";
var sassPromise = new Promise(function(resolve, reject) {
exec(sassCmd, env, function(error) {
if (error) {
console.error("You need to have Sass on your system");
console.error("Execute `gem install sass`");
reject();
} else {
resolve();
}
});
});
var compassPromise = new Promise((function(resolve, reject) {
exec(compassCmd, env, (function(error) {
this.compass = !error;
resolve();
}).bind(this));
}).bind(this));
this.rubyPromise = Promise.all([sassPromise, compassPromise]);
};
SassCompiler.prototype._getIncludePaths = function(path) {
var includePaths = [this.rootPath, sysPath.dirname(path)];
if (Array.isArray(this.includePaths)) {
includePaths = includePaths.concat(this.includePaths);
}
return includePaths;
};
SassCompiler.prototype._nativeCompile = function(source, callback) {
libsass.render({
data: source.data,
success: (function(data) {
if(data.css) data = data.css;
callback(null, data);
}),
error: (function(error) {
callback(error);
}),
includePaths: this._getIncludePaths(source.path),
outputStyle: 'nested',
sourceComments: !this.optimize
});
};
SassCompiler.prototype._rubyCompile = function(source, callback) {
if (this.rubyPromise == null) this._checkRuby();
var result = '';
var error = null;
var cmd = [
this._bin,
'--stdin'
];
var includePaths = this._getIncludePaths(source.path);
includePaths.forEach(function(path) {
cmd.push('--load-path');
cmd.push(path);
});
if (!this.config.allowCache) cmd.push("--no-cache");
if (this.bundler) cmd.unshift('bundle', 'exec');
this.rubyPromise.then((function() {
var debugMode = this.config.debug, hasComments;
if ((debugMode === 'comments' || debugMode === 'debug') && !this.optimize) {
hasComments = this.config.debug === 'comments';
cmd.push(hasComments ? '--line-comments' : '--debug-info');
}
if (!sassRe.test(source.path)) cmd.push('--scss');
if (source.compass && this.compass) cmd.push('--compass');
if (this.config.options != null) cmd.push.apply(cmd, this.config.options);
if (isWindows) {
cmd = ['cmd', '/c', '"' + cmd[0] + '"'].concat(cmd.slice(1));
this.env.windowsVerbatimArguments = true;
}
var sass = spawn(cmd[0], cmd.slice(1), this.env);
sass.stdout.on('data', function(buffer) {
result += buffer.toString();
});
sass.stderr.on('data', function(buffer) {
if (error == null) error = '';
error += buffer.toString();
});
sass.on('close', function(code) {
callback(error, result);
});
if (sass.stdin.write(source.data)) {
sass.stdin.end();
} else {
sass.stdin.on('drain', function() {
sass.stdin.end();
});
}
}).bind(this));
};
SassCompiler.prototype.compile = function(data, path, callback) {
// skip empty source files
if (!data.trim().length) return callback(null, '');
this.seekCompass(path, data, (function (err, imports) {
if (err) callback(err);
var source = {
data: data,
path: path,
compass: imports.some(function (depPath){
return compassRe.test(depPath);
})
};
var fileUsesRuby = sassRe.test(path) || source.compass;
if (this.mode === 'ruby' || (this.mode !== 'native' && fileUsesRuby)) {
this._rubyCompile(source, callback);
} else {
this._nativeCompile(source, callback);
}
}).bind(this));
};
module.exports = SassCompiler;