[darcs-users] darcs patch: resolve issue784: fix file handle leak and check for exceptions on process running.
droundy at darcs.net
Tue Oct 21 10:21:09 UTC 2008
On Mon, Oct 20, 2008 at 08:08:41AM +0200, Salvatore Insalaco wrote:
> I'm sorry for not using darcs send: unfortunately my mail are blocked
> by the mailing list spam filter.
> This patch should hopefully fix issue 784 (Windows complaining while
> paging the help).
> There where three things involved:
> 1) There is a file handle leak in pipeDocToPager when an exception is
> raised. This is the direct cause of the "permission denied" errors, as
> you can't delete an opened file in Windows.
> 2) ortryrunning doesn't check for exceptions: in Windows a failed
> runProcess returns an exception.
> 3) runProcess on Windows require explicit ".com" suffix for .com
> executables. We should add "more.com" to the list of possible pagers.
Looks good! It's going in, once tests are passed. :)
This is one of the many places where things will be far better with the new
System.Process. It's seriously stupid that we're forced to write a
temporary file just so stdout will be inherited.
> By the way: a bit thank you to David for Franchise. I finally managed
> to compile and patch darcs under Windows installing only GHC and a
> couple of Haskell libraries (HTTP and zlib, required by cabal too). No
> MinGW, no Cygnus. Surely we could improve the build process (the
> configure step before every compilation is a bit annoying), but this
> is a huge step forward.
Setup.hs shouldn't be reconfiguring before each compilation (unless you
touch Setup.hs itself. This sounds like a bug... Can you try demonstrating
it with the latest franchise and darcs, and send in the build.log? (You can
interrupt after the compile begins to keep the build.log from being too
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