#14648: ghc-pkg does handle unitids -------------------------------------+------------------------------------- Reporter: lspitzner | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: ghc-pkg | Version: 8.2.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by ezyang): Yes, the defaulting to pkgname-version is tiresome but it's this way for backwards compatibility (since that is how ghc-pkg worked in the old days); and the surprising behavior stems from another BC thing where version numbers parse with tags and then Cabal ignores the tag, so `semigroupoids-5.2.1-f552e489ce3109c2672606e2dc6e33c4f38174da930d5db0bb0dafbb4dccae8` parses into `semigroupoids-5.2.1` and off we go. If someone updates ghc-pkg not to use Cabal's "tag ignoring" parser and handles the parsing itself, we could make it error when it sees a tag, or better yet automatically interpret it as an IPID. It's more work in the implementation but it would smooth this edge. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14648#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler