iserv: Show usage message on argument parse failure
authorBen Gamari <bgamari.foss@gmail.com>
Tue, 30 Aug 2016 21:06:08 +0000 (17:06 -0400)
committerBen Gamari <ben@smart-cactus.org>
Wed, 31 Aug 2016 17:15:33 +0000 (13:15 -0400)
commit3005fa5313b6d5fd9d4f47192c84e96e94ee7f17
tree13f42f4b2436c191f9df0cfa8088f4e1d8b91993
parent0e7492508cefbcabb4cf1398cfb3669edb72db77
iserv: Show usage message on argument parse failure

Test Plan: validate

Reviewers: simonmar, erikd, austin

Reviewed By: simonmar, erikd

Subscribers: thomie, erikd

Differential Revision: https://phabricator.haskell.org/D2494

GHC Trac Issues: #12491
iserv/iserv-bin.cabal
iserv/src/Main.hs