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var _ = require('lodash');
var Q = require('q');
var tmp = require('tmp');
var path = require('path');
var fs = require('graceful-fs');
var fsExtra = require('fs-extra');
var Ignore = require('fstream-ignore');
var fsUtils = {
tmp: {
file: function(opt) {
return Q.nfcall(tmp.file.bind(tmp), opt).get(0);
},
dir: function() {
return Q.nfcall(tmp.dir.bind(tmp)).get(0);
}
},
list: listFiles,
stat: Q.denodeify(fs.stat),
readdir: Q.denodeify(fs.readdir),
readFile: Q.denodeify(fs.readFile),
writeFile: writeFile,
writeStream: writeStream,
mkdirp: Q.denodeify(fsExtra.mkdirp),
copy: Q.denodeify(fsExtra.copy),
remove: Q.denodeify(fsExtra.remove),
symlink: Q.denodeify(fsExtra.symlink),
exists: function(path) {
var d = Q.defer();
fs.exists(path, d.resolve);
return d.promise;
},
findFile: findFile,
existsSync: fs.existsSync.bind(fs),
readFileSync: fs.readFileSync.bind(fs),
clean: cleanFolder,
getUniqueFilename: getUniqueFilename
};
// Write a file
function writeFile(filename, data, options) {
var d = Q.defer();
try {
fs.writeFileSync(filename, data, options);
} catch(err) {
d.reject(err);
}
d.resolve();
return d.promise;
}
// Write a stream to a file
function writeStream(filename, st) {
var d = Q.defer();
var wstream = fs.createWriteStream(filename);
wstream.on('finish', function () {
d.resolve();
});
wstream.on('error', function (err) {
d.reject(err);
});
st.on('error', function(err) {
d.reject(err);
});
st.pipe(wstream);
return d.promise;
}
// Find a filename available
function getUniqueFilename(base, filename) {
if (!filename) {
filename = base;
base = '/';
}
filename = path.resolve(base, filename);
var ext = path.extname(filename);
filename = path.join(path.dirname(filename), path.basename(filename, ext));
var _filename = filename+ext;
var i = 0;
while (fs.existsSync(filename)) {
_filename = filename+'_'+i+ext;
i = i + 1;
}
return path.relative(base, _filename);
}
// List files in a directory
function listFiles(root, options) {
options = _.defaults(options || {}, {
ignoreFiles: [],
ignoreRules: []
});
var d = Q.defer();
// Our list of files
var files = [];
var ig = Ignore({
path: root,
ignoreFiles: options.ignoreFiles
});
// Add extra rules to ignore common folders
ig.addIgnoreRules(options.ignoreRules, '__custom_stuff');
// Push each file to our list
ig.on('child', function (c) {
files.push(
c.path.substr(c.root.path.length + 1) + (c.props.Directory === true ? '/' : '')
);
});
ig.on('end', function() {
// Normalize paths on Windows
if(process.platform === 'win32') {
return d.resolve(files.map(function(file) {
return file.replace(/\\/g, '/');
}));
}
// Simply return paths otherwise
return d.resolve(files);
});
ig.on('error', d.reject);
return d.promise;
}
// Clean a folder without removing .git and .svn
// Creates it if non existant
function cleanFolder(root) {
if (!fs.existsSync(root)) return fsUtils.mkdirp(root);
return listFiles(root, {
ignoreFiles: [],
ignoreRules: [
// Skip Git and SVN stuff
'.git/',
'.svn/'
]
})
.then(function(files) {
var d = Q.defer();
_.reduce(files, function(prev, file, i) {
return prev.then(function() {
var _file = path.join(root, file);
d.notify({
i: i+1,
count: files.length,
file: _file
});
return fsUtils.remove(_file);
});
}, Q())
.then(function() {
d.resolve();
}, function(err) {
d.reject(err);
});
return d.promise;
});
}
// Find a file in a folder (case incensitive)
// Return the real filename
function findFile(root, filename) {
return Q.nfcall(fs.readdir, root)
.then(function(files) {
return _.find(files, function(file) {
return (file.toLowerCase() == filename.toLowerCase());
});
});
}
module.exports = fsUtils;
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