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guix: utils: Add version-major. 

* guix/utils.scm (version-major): New procedure.
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nee 2017-10-09 23:02:05 +02:00 committed by Christopher Baines
parent 1e52fd83c2
commit 47dc9a0dae
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@ -82,6 +82,7 @@
version>=?
version-prefix
version-major+minor
version-major
guile-version>?
string-replace-substring
arguments-from-environment-variable
@ -497,6 +498,10 @@ For example, (version-prefix \"2.1.47.4.23\" 3) returns \"2.1.47\""
minor version numbers from version-string."
(version-prefix version-string 2))
(define (version-major version-string)
"Return the major version number as string from the version-string."
(version-prefix version-string 1))
(define (version>? a b)
"Return #t when A denotes a version strictly newer than B."
(eq? '> (version-compare a b)))