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"main-is" misparsed in if/else, only by sdist #807

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bos opened this Issue · 1 comment

2 participants

@bos
Owner

(Imported from Trac #817, reported by @jeffwheeler on 2011-03-22)

An if/else block which sets the main-is value for an executable based on a flag is misparsed when running "cabal sdist" (it's parsed correctly when running "cabal install").

Upon failure, it appears that it's looking for a filename that is the two main-is options concatenated together. E.g., I get the error "cabal: HackerMain?.hsMain.hs doesn't exist".

The problematic bit looks like:

if flag(hacking)

main-is: `HackerMain?`.hs

else

main-is: Main.hs

My entire config can be found on hpaste: http://hpaste.org/44939/yicabal (problematic lines around 268).

@bos
Owner

(Imported comment by @dcoutts on 2011-03-22)

Another example http://hpaste.org/48025

Two problems: one is the way sdist uses flatten, and the other is that monoid instance for main-is concatenates rather than picks the last. sdist should not use flatten, it needs to get the collection of values.

@ttuegel ttuegel added this to the _|_ milestone
@ttuegel ttuegel removed the low-priority label
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