Sun Mar 2 13:50:20 CET 2008 Pepe Iborra
* Trac #221 part 1
This patch adds two missing cl flags to configure, --extra-include-dirs and extra-lib-dirs.
These have effect over all the buildables in a project.
The next step is to close #223 so that all the configure
cl flags can be stored in the .cabal/config file. With this patch, that should close #221 too.
Sat Mar 15 20:12:52 CET 2008 Pepe Iborra
* Refactoring Distribution.Command.Simple.Option (see Ticket #223)
so that it really represents an option and not just a flag.
data Option a = Option {
optionName :: Name,
optionDescr :: [OptDescr a] }
data OptDescr a = ReqArg Description OptFlags ArgDescr (ReadE (a->a)) (a -> [String])
| OptArg Description OptFlags ArgDescr (ReadE (a->a)) (a->a) (a -> [Maybe String])
| Choice [(Description, OptFlags, a->a, a -> Bool)]
Now an option can expand to several flags, which are all defined together.
For example, the compiler flag is defined as follows.
option [] ["compiler"] "compiler"
configHcFlavor (\v flags -> flags { configHcFlavor = v })
(choiceOpt [ (Flag GHC, ("g", ["ghc"]), "compile with GHC")
, (Flag NHC, ([] , ["nhc98"]), "compile with NHC")
, (Flag JHC, ([] , ["jhc"]), "compile with JHC")
, (Flag Hugs,([] , ["hugs"]), "compile with Hugs")])
We can need to use several kinds of OptDescr for the same option, as in the
optimization Option (really a extreme case):
,multiOption "optimization"
configOptimization (\v flags -> flags { configOptimization = v })
[optArg' "n" (Flag . flagToOptimisationLevel)
....
....
"Build with optimization (n is 0--2, default is 1)",
noArg (Flag NoOptimisation) []
("disable-optimization": case showOrParseArgs of
-- Allow British English spelling:
ShowArgs -> []; ParseArgs -> ["disable-optimisation"])
"Build without optimization"
]
The benefit is that we can now derive a FieldDescr from an Option,
viewAsFieldDescr :: Option a -> FieldDescr a
and this allows for easy human readable serialization of Options to a config file,
as it is needed for cabal-install.
