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utils.js
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utils.js
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var undef, sys = require('util'),
path = require('path'),
fs = require('fs'),
vm = require('vm'),
i8n = require('inflection');
exports.html_tag_params = function(params, override) {
var maybe_params = '';
safe_merge(params, override);
for (var key in params) {
if (params[key] != undef) {
maybe_params += ' ' + key + '="' + params[key].toString().replace(/&/g, '&').replace(/"/g, '"') + '"';
}
}
return maybe_params;
};
var safe_merge = exports.safe_merge = function(merge_what) {
merge_what = merge_what || {};
Array.prototype.slice.call(arguments).forEach(function(merge_with, i) {
if (i == 0) return;
for (var key in merge_with) {
if (!merge_with.hasOwnProperty(key) || key in merge_what) continue;
merge_what[key] = merge_with[key];
}
});
return merge_what;
};
exports.humanize = function(underscored) {
var res = underscored.replace(/_/g, ' ');
return res[0].toUpperCase() + res.substr(1);
};
exports.camelize = function(underscored, upcaseFirstLetter) {
var res = '';
underscored.split('_').forEach(function(part) {
res += part[0].toUpperCase() + part.substr(1);
});
return upcaseFirstLetter ? res : res[0].toLowerCase() + res.substr(1);
};
exports.classify = function(str) {
return exports.camelize(exports.singularize(str));
};
exports.underscore = function(camelCaseStr) {
var initialUnderscore = camelCaseStr.match(/^_/) ? '_' : '';
var str = camelCaseStr
.replace(/^_([A-Z])/g, '$1')
.replace(/([A-Z])/g, '_$1')
.replace(/^_/, initialUnderscore);
return str.toLowerCase();
};
exports.singularize = function singularize(str, singular) {
return i8n.singularize(str, singular);
};
exports.pluralize = function pluralize(str, plural) {
return i8n.pluralize(str, plural)
};
// Stylize a string
function stylize(str, style) {
if (typeof window !== 'undefined') return str;
var styles = {
'bold' : [1, 22],
'italic' : [3, 23],
'underline' : [4, 24],
'cyan' : [96, 39],
'blue' : [34, 39],
'yellow' : [33, 39],
'green' : [32, 39],
'red' : [31, 39],
'grey' : [90, 39],
'green-hi' : [92, 32]
};
var s = styles[style];
return '\033[' + s[0] + 'm' + str + '\033[' + s[1] + 'm';
}
var $ = function(str) {
str = new(String)(str);
['bold', 'grey', 'yellow', 'red', 'green', 'cyan', 'blue', 'italic', 'underline'].forEach(function(style) {
Object.defineProperty(str, style, {
get: function() {
return $(stylize(this, style));
}
});
});
return str;
};
stylize.$ = $;
exports.stylize = stylize;
var addCoverage = exports.addCoverage = function(code, filename) {
if (!global.__cov) return code;
return require('semicov').addCoverage(code, filename);
};
// cache for source code
var cache = {};
// cache for compiled scripts
var scriptCache = {};
function addSpaces(str, len, to_start) {
var str_len = str.length;
for (var i = str_len; i < len; i += 1) {
if (!to_start) {
str += ' ';
} else {
str = ' ' + str;
}
}
return str;
}
exports.addSpaces = addSpaces;
function readYaml(file) {
try {
var yaml = require(['yaml', 'js'].join('-'));
var obj = yaml.load(fs.readFileSync(file).toString());
if (obj && obj.shift) {
obj = obj.shift();
}
return obj;
} catch (e) {
console.log('Error in reading', file);
console.log(e.message);
console.log(e.stack);
}
}
exports.readYaml = readYaml;
exports.existsSync = fs.existsSync || path.existsSync;
function recursivelyWalkDir(directory, filter, callback) {
if(!callback) { callback = filter; filter = null; }
var results = [];
fs.readdir(directory, function(err, list) {
if (err) return callback(err);
var pending = list.length;
if (!pending) return callback(null, results);
list.forEach(function(file) {
file = directory + '/' + file;
fs.stat(file, function(err, stat) {
if (stat && stat.isDirectory()) {
recursivelyWalkDir(file, filter, function(err, res) {
results = results.concat(res);
if (!--pending) callback(null, results);
});
} else {
results.push(file);
if (!--pending) callback(null, results);
}
});
});
});
}
exports.recursivelyWalkDir = recursivelyWalkDir;
function ensureDirectoryExists(directory, root) {
var dirs = directory.split('/')
, dir = dirs.shift()
, root = (root || '') + dir + '/';
try { fs.mkdirSync(root); }
catch (e) {
if(!fs.statSync(root).isDirectory()) throw new Error(e);
}
return !dirs.length || ensureDirectoryExists(dirs.join('/'), root);
}
exports.ensureDirectoryExists = ensureDirectoryExists;