deps: upgrade npm to 6.1.0

PR-URL: https://github.com/nodejs/node/pull/20190
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/deps/npm/node_modules/iferr/iferr.js b/deps/npm/node_modules/iferr/iferr.js
new file mode 100644
index 0000000000..028f0e24a3
--- /dev/null
+++ b/deps/npm/node_modules/iferr/iferr.js
@@ -0,0 +1,23 @@
+// Delegates to `succ` on sucecss or to `fail` on error
+// ex: Thing.load(123, iferr(cb, thing => ...))
+const iferr = (fail, succ) => (err, ...a) => err ? fail(err) : succ(...a)
+
+// Like iferr, but also catches errors thrown from `succ` and passes to `fail`
+const tiferr = (fail, succ) => iferr(fail, (...a) => {
+  try { succ(...a) }
+  catch (err) { fail(err) }
+})
+
+// Delegate to the success function on success, throws the error otherwise
+// ex: Thing.load(123, throwerr(thing => ...))
+const throwerr = iferr.bind(null, err => { throw err })
+
+// Prints errors when one is passed, or does nothing otherwise
+// ex: Thing.load(123, printerr)
+const printerr = iferr(err => console.error(err), () => {})
+
+module.exports = exports = iferr
+exports.iferr = iferr
+exports.tiferr = tiferr
+exports.throwerr = throwerr
+exports.printerr = printerr