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definition:
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getCpmTool :: String -> IO (Maybe String)
getCpmTool toolbin = do
excmd <- system $ "which " ++ toolbin ++ " > /dev/null"
if excmd == 0
then return $ Just toolbin
else do homedir <- getHomeDirectory
let cpmtoolfile = homedir </> ".cpm" </> "bin" </> toolbin
excpm <- doesFileExist cpmtoolfile
if excpm
then return $ Just cpmtoolfile
else return Nothing
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demand:
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no demanded arguments
|
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deterministic:
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deterministic operation
|
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documentation:
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-- Check whether some tool installable by CPM is available, i.e.,
-- either in the current path or in the CPM bin directory,
-- and return its name or path.
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failfree:
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<FAILING>
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indeterministic:
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referentially transparent operation
|
|
infix:
|
no fixity defined
|
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iotype:
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{(_) |-> _}
|
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name:
|
getCpmTool
|
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precedence:
|
no precedence defined
|
|
result-values:
|
_
|
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signature:
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String -> Prelude.IO (Prelude.Maybe String)
|
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solution-complete:
|
operation might suspend on free variables
|
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terminating:
|
possibly non-terminating
|
|
totally-defined:
|
possibly non-reducible on same data term
|