gorillajs
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A smart development environment designed to easily install and neatly manage web applications. Gorilla JS frees you from the repetitive daily tasks like apps installation, database management, creation of virtual environment, server configuration… And it
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JavaScript
var path = require('path')
// path.isAbsolute shim for Node.js 0.10 support
path.isAbsolute = (path.isAbsolute) ? path.isAbsolute : require('path-is-absolute')
var fs = require('graceful-fs')
/**
* Function that returns two types of paths, one relative to symlink, and one
* relative to the current working directory. Checks if path is absolute or
* relative. If the path is relative, this function checks if the path is
* relative to symlink or relative to current working directory. This is an
* initiative to find a smarter `srcpath` to supply when building symlinks.
* This allows you to determine which path to use out of one of three possible
* types of source paths. The first is an absolute path. This is detected by
* `path.isAbsolute()`. When an absolute path is provided, it is checked to
* see if it exists. If it does it's used, if not an error is returned
* (callback)/ thrown (sync). The other two options for `srcpath` are a
* relative url. By default Node's `fs.symlink` works by creating a symlink
* using `dstpath` and expects the `srcpath` to be relative to the newly
* created symlink. If you provide a `srcpath` that does not exist on the file
* system it results in a broken symlink. To minimize this, the function
* checks to see if the 'relative to symlink' source file exists, and if it
* does it will use it. If it does not, it checks if there's a file that
* exists that is relative to the current working directory, if does its used.
* This preserves the expectations of the original fs.symlink spec and adds
* the ability to pass in `relative to current working direcotry` paths.
*/
function symlinkPaths (srcpath, dstpath, callback) {
if (path.isAbsolute(srcpath)) {
return fs.lstat(srcpath, function (err, stat) {
if (err) {
err.message = err.message.replace('lstat', 'ensureSymlink')
return callback(err)
}
return callback(null, {
'toCwd': srcpath,
'toDst': srcpath
})
})
} else {
var dstdir = path.dirname(dstpath)
var relativeToDst = path.join(dstdir, srcpath)
return fs.exists(relativeToDst, function (exists) {
if (exists) {
return callback(null, {
'toCwd': relativeToDst,
'toDst': srcpath
})
} else {
return fs.lstat(srcpath, function (err, stat) {
if (err) {
err.message = err.message.replace('lstat', 'ensureSymlink')
return callback(err)
}
return callback(null, {
'toCwd': srcpath,
'toDst': path.relative(dstdir, srcpath)
})
})
}
})
}
}
function symlinkPathsSync (srcpath, dstpath) {
var exists
if (path.isAbsolute(srcpath)) {
exists = fs.existsSync(srcpath)
if (!exists) throw new Error('absolute srcpath does not exist')
return {
'toCwd': srcpath,
'toDst': srcpath
}
} else {
var dstdir = path.dirname(dstpath)
var relativeToDst = path.join(dstdir, srcpath)
exists = fs.existsSync(relativeToDst)
if (exists) {
return {
'toCwd': relativeToDst,
'toDst': srcpath
}
} else {
exists = fs.existsSync(srcpath)
if (!exists) throw new Error('relative srcpath does not exist')
return {
'toCwd': srcpath,
'toDst': path.relative(dstdir, srcpath)
}
}
}
}
module.exports = {
'symlinkPaths': symlinkPaths,
'symlinkPathsSync': symlinkPathsSync
}