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return EISDIR if path is a directory #3

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return EISDIR if path is a directory #3

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23 changes: 19 additions & 4 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -35,14 +35,29 @@ function notaShim (path, er) {
return er
}

function isDir (path, er) {
er.code = 'EISDIR'
er.message = "'" + path + "' is a directory"
return er
}

var readCmdShim = module.exports = function (path, cb) {
var er = new Error()
Error.captureStackTrace(er, readCmdShim)
fs.readFile(path, function (readFileEr, contents) {
if (readFileEr) return cb(wrapError(readFileEr, er))
var destination = extractPath(path, contents.toString())
if (destination) return cb(null, destination)
return cb(notaShim(path, er))
if (readFileEr) {
// fs.readFile will return EINVAL rather than EISDIR
// if path is a directory.
if (readFileEr.code !== 'EINVAL') return cb(wrapError(readFileEr, er))
fs.stat(path, function (statEr, stats) {
if (!statEr && stats.isDirectory()) return cb(isDir(path, er))
return cb(wrapError(readFileEr, er))
})
} else {
var destination = extractPath(path, contents.toString())
if (destination) return cb(null, destination)
return cb(notaShim(path, er))
}
})
}

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