This is the source tree for darcs, a distributed version control system
written in Haskell.
For more information, visit the darcs web site:
Compilation and Installation
Building Darcs is best done with the Haskell Platform:
http://www.haskell.org/platform/. Any release of darcs should build with
the most recent version of the Platform at the time of the release. This
will also generally apply to unstable versions.
If you are not using the Platform, then you need GHC and Cabal.
The versions required can be found in the darcs.cabal file under
'build-tools' and 'Cabal-Version' respectively.
The cabal-install package is also recommended.
If you have the Platform or otherwise have the "cabal-install" package
on your system (that is, there is a "cabal" executable in your path),
you can use the following command to create an executable in
~/.cabal/bin/darcs (this will also automatically fetch and build
dependencies from the Hackage server).
$ cabal update
$ cabal install
Otherwise, if you have the "cabal" package but not the "cabal-install"
package, run the following:
$ runghc Setup configure
$ runghc Setup build
$ sudo runghc Setup install
You may also omit the last step and copy the darcs executable (found in
dist/build/darcs/darcs) to a location of your choosing.
More detailed instructions can be found at
including instructions on obtaining a copy of cabal-install.
Please also note that the cabal-based build by default requires the cURL
library (and development headers). If, for some reason, you cannot provide
cURL, please pass "-f-curl" to the configure step above.
For more information about darcs hacking and best practices please check
the darcs wiki at http://wiki.darcs.net
Of particular interest are the following documents:
Comments about do-notation warnings
You may find a number of comments (163 of them at the time of writing) looking
-- Warning: A do-notation statement discarded a result of type Whatever.
They signal warnings issued by GHC that have been automatically silenced.
See http://bugs.darcs.net/issue1988 for more detail.
These warnings were most certainly harmless, but who knows... If you stumble
upon one such comment, take a minute or two to check if it is really okay to
ignore the return value (look for "_ <- " on the line next to the comment). If
everything is correct, please remove the comment and send a patch (mentioning
issue1988). If it isn't, you have found a bug, congratulations! Fix it, or
fill a bug report on http//bugs.darcs.net/. Finally, if in doubt, leave it as
is. Many thanks.
For more information about the test suite, including how to run specific
tests please read tests/README.test_maintainers.txt.