--- /dev/null
+'use strict'
+
+// turn tar(1) style args like `C` into the more verbose things like `cwd`
+
+const argmap = new Map([
+ ['C', 'cwd'],
+ ['f', 'file'],
+ ['z', 'gzip'],
+ ['P', 'preservePaths'],
+ ['U', 'unlink'],
+ ['strip-components', 'strip'],
+ ['stripComponents', 'strip'],
+ ['keep-newer', 'newer'],
+ ['keepNewer', 'newer'],
+ ['keep-newer-files', 'newer'],
+ ['keepNewerFiles', 'newer'],
+ ['k', 'keep'],
+ ['keep-existing', 'keep'],
+ ['keepExisting', 'keep'],
+ ['m', 'noMtime'],
+ ['no-mtime', 'noMtime'],
+ ['p', 'preserveOwner'],
+ ['L', 'follow'],
+ ['h', 'follow']
+])
+
+const parse = module.exports = opt => opt ? Object.keys(opt).map(k => [
+ argmap.has(k) ? argmap.get(k) : k, opt[k]
+]).reduce((set, kv) => (set[kv[0]] = kv[1], set), Object.create(null)) : {}