darcs: a distributed, interactive, smart revision control system

[ development, gpl, library ] [ Propose Tags ]

Darcs is a free, open source revision control system. It is:

  • Distributed: Every user has access to the full command set, removing boundaries between server and client or committer and non-committers.

  • Interactive: Darcs is easy to learn and efficient to use because it asks you questions in response to simple commands, giving you choices in your work flow. You can choose to record one change in a file, while ignoring another. As you update from upstream, you can review each patch name, even the full "diff" for interesting patches.

  • Smart: Originally developed by physicist David Roundy, darcs is based on a unique algebra of patches.

This smartness lets you respond to changing demands in ways that would otherwise not be possible. Learn more about spontaneous branches with darcs.

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Automatic Flags

Use libcurl for HTTP support.


Use the pure Haskell HTTP package for HTTP support.


Build static binary


Use the terminfo package for enhanced console support.


Use threading and SMP support.


Build darcs library


Build darcs executable


Use ansi color escapes.


Compile with mmap support.


Build test harness


Build with optimizations (-O2)


Build with warnings-as-errors


Allow base 4.5 or above on Unix. base 4.4 introduces a change in the behaviour of filenames that requires API calls in base 4.5 to workaround. So base 4.4 is not supported at all.


Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info


Maintainer's Corner

Package maintainers

For package maintainers and hackage trustees


Versions [RSS],,,, 2.2.0, 2.2.1, 2.3.0, 2.3.1, 2.4, 2.4.1, 2.4.3, 2.4.4, 2.5, 2.5.1, 2.5.2, 2.8.0, 2.8.1, 2.8.2, 2.8.3, 2.8.4, 2.8.5, 2.10.0, 2.10.1, 2.10.2, 2.10.3, 2.12.0, 2.12.1, 2.12.2, 2.12.3, 2.12.4, 2.12.5, 2.14.0, 2.14.1, 2.14.2, 2.14.3, 2.14.4, 2.14.5, 2.16.1, 2.16.2, 2.16.3, 2.16.4, 2.16.5, 2.18.1, 2.18.2, 2.18.3
Change log NEWS
Dependencies array (>=0.1 && <0.5), base (>=4 && <4.6), bytestring (>=0.9.0 && <0.10), cmdlib (>=0.2.1 && <0.4), containers (>=0.1 && <0.5), directory (>= && <, extensible-exceptions (>=0.1 && <0.2), filepath (>= && <, hashed-storage (>=0.5.6 && <0.6), haskeline (>=0.6.3 && <0.7), html (>=1.0 && <1.1), HTTP (>=4000.0.8 && <4000.3), HUnit (>=1.0), mmap (>=0.5 && <0.6), mtl (>=1.0 && <2.1), network (>=2.2 && <2.4), old-time (>=1.0 && <1.2), parsec (>=2.0 && <3.2), process (>= && <, QuickCheck (>=2.3), random (>=1.0 && <1.1), regex-compat (>=0.95.1), regex-posix (>=0.95.1), shellish (>=0.1.3 && <0.2), tar (>=0.3 && <0.4), terminfo (>=0.3 && <0.4), test-framework (>=0.4.0), test-framework-hunit (>=0.2.2), test-framework-quickcheck2 (>=0.2.8), text (>= && <, unix (>=1.0 && <2.6), unix-compat (>=0.1.2), vector (>=0.7), zlib (>= && < [details]
License LicenseRef-GPL
Author David Roundy <droundy@darcs.net>, <darcs-users@darcs.net>
Maintainer <darcs-users@darcs.net>
Category Development
Home page http://darcs.net/
Source repo head: darcs get http://darcs.net/
Uploaded by FlorentBecker at 2012-04-22T15:29:23Z
Distributions Arch:2.18.1, Debian:2.14.5, Fedora:2.16.5, FreeBSD:2.10.1, NixOS:2.18.3
Reverse Dependencies 2 direct, 0 indirect [details]
Executables darcs-test, darcs
Downloads 51852 total (248 in the last 30 days)
Rating 2.5 (votes: 3) [estimated by Bayesian average]
Your Rating
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Status Docs uploaded by user
Build status unknown [no reports yet]

Readme for darcs-2.8.0

[back to package description]
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 requires GHC, version 6.10.3 or higher. It also requires the
Cabal package, version 1.6 or higher.  The cabal-install package is also

If you 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:
  * http://wiki.darcs.net/Development/GettingStarted
  * http://wiki.darcs.net/Development/FAQ

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.

Happy hacking!