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gnu: Add ocaml-spawn.

* gnu/packages/ocaml.scm (ocaml-spawn): New variable.
master
Julien Lepiller 2019-02-03 17:29:33 +01:00
parent 3e3d5ffc34
commit 9e81db80eb
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@ -6030,3 +6030,47 @@ Configurator allows one to:
@item generate config.h file
@end itemize")
(license license:asl2.0)))
(define-public ocaml-spawn
(package
(name "ocaml-spawn")
(version "0.12.0")
(source (origin
(method git-fetch)
(uri (git-reference
(url "https://github.com/janestreet/spawn.git")
(commit (string-append "v" version))))
(sha256
(base32
"0amgj7g9sjlbjivn1mg7yjdmxd21hgp4a0ak2zrm95dmm4gi846i"))))
(build-system dune-build-system)
(arguments
`(#:phases
(modify-phases %standard-phases
(add-before 'check 'fix-tests
(lambda _
(substitute* "test/tests.ml"
(("/bin/pwd") (which "pwd"))
(("/bin/echo") (which "echo")))
#t)))))
(native-inputs
`(("ocaml-ppx-expect" ,ocaml-ppx-expect)))
(home-page "https://github.com/janestreet/spawn")
(synopsis "Spawning sub-processes")
(description
"Spawn is a small library exposing only one functionality: spawning sub-process.
It has three main goals:
@itemize
@item provide missing features of Unix.create_process such as providing a
working directory,
@item provide better errors when a system call fails in the
sub-process. For instance if a command is not found, you get a proper
@code{Unix.Unix_error} exception,
@item improve performances by using vfork when available. It is often
claimed that nowadays fork is as fast as vfork, however in practice
fork takes time proportional to the process memory while vfork is
constant time. In application using a lot of memory, vfork can be
thousands of times faster than fork.")
(license license:asl2.0)))