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authorArun Isaac <arunisaac@systemreboot.net>2017-03-08 23:28:34 +0530
committerMarius Bakke <mbakke@fastmail.com>2017-03-09 17:11:03 +0100
commitb6b2ca5d19806a9ef13587b4988aa53ae7812878 (patch)
tree8749f15d6efe1b8e592830b4980e432b31f2628d /gnu
parentc220f0b4740fb95e1b8e27d1a6fca00b68dd6df0 (diff)
downloadguix-b6b2ca5d19806a9ef13587b4988aa53ae7812878.tar
guix-b6b2ca5d19806a9ef13587b4988aa53ae7812878.tar.gz
gnu: Add python2-larch.
* gnu/packages/python.scm (python2-larch): New variable. Signed-off-by: Marius Bakke <mbakke@fastmail.com>
Diffstat (limited to 'gnu')
-rw-r--r--gnu/packages/python.scm31
1 files changed, 31 insertions, 0 deletions
diff --git a/gnu/packages/python.scm b/gnu/packages/python.scm
index 2e68db72d7..ee785c26ed 100644
--- a/gnu/packages/python.scm
+++ b/gnu/packages/python.scm
@@ -13567,3 +13567,34 @@ than using @code{logging.Filter} to accomplish the same thing, which
matters when code is run in production mode. The actual logging still
happens using the @code{logging} library.")
(license license:gpl3+)))
+
+(define-public python2-larch
+ (package
+ (name "python2-larch")
+ (version "1.20151025")
+ (source
+ (origin
+ (method url-fetch)
+ (uri (string-append
+ "http://git.liw.fi/cgi-bin/cgit/cgit.cgi/larch/snapshot/larch-"
+ version ".tar.gz"))
+ (sha256
+ (base32
+ "1p4knkkavlqymgciz2wbcnfrdgdbafhg14maplnk4vbw0q8xs663"))))
+ (build-system python-build-system)
+ (arguments
+ `(#:python ,python-2))
+ (propagated-inputs
+ `(("python2-tracing" ,python2-tracing)))
+ (home-page "https://liw.fi/larch/")
+ (synopsis "Python copy-on-write B-tree library")
+ (description "@code{python2-larch} is an implementation of
+particular kind of B-tree, based on research by Ohad Rodeh. See
+@url{http://liw.fi/larch/ohad-btrees-shadowing-clones.pdf} for details
+on the data structure.
+
+The distinctive feature of this B-tree is that a node is never
+(conceptually) modified. Instead, all updates are done by
+copy-on-write. This makes it easy to clone a tree, and modify only the
+clone, while other processes access the original tree.")
+ (license license:gpl3+)))