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store: Add `store-path-package-name'.

* guix/store.scm (store-path-package-name): New procedure.
* tests/utils.scm ("store-path-package-name"): New test.
gn-latest-20200428
Ludovic Courtès 9 years ago
parent
commit
e3d741065e
2 changed files with 19 additions and 1 deletions
  1. +12
    -1
      guix/store.scm
  2. +7
    -0
      tests/utils.scm

+ 12
- 1
guix/store.scm View File

@ -29,6 +29,7 @@
#:use-module (ice-9 match)
#:use-module (ice-9 rdelim)
#:use-module (ice-9 ftw)
#:use-module (ice-9 regex)
#:export (nix-server?
nix-server-major-version
nix-server-minor-version
@ -55,7 +56,8 @@
%store-prefix
store-path?
derivation-path?))
derivation-path?
store-path-package-name))
(define %protocol-version #x10b)
@ -446,3 +448,12 @@ file name. Return #t on success."
(define (derivation-path? path)
"Return #t if PATH is a derivation path."
(and (store-path? path) (string-suffix? ".drv" path)))
(define (store-path-package-name path)
"Return the package name part of PATH, a file name in the store."
(define store-path-rx
(make-regexp (string-append "^.*" (regexp-quote (%store-prefix))
"/[^-]+-(.+)$")))
(and=> (regexp-exec store-path-rx path)
(cut match:substring <> 1)))

+ 7
- 0
tests/utils.scm View File

@ -19,6 +19,7 @@
(define-module (test-utils)
#:use-module (guix utils)
#:use-module ((guix store) #:select (store-path-package-name))
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-11)
#:use-module (srfi srfi-26)
@ -162,6 +163,12 @@
(match b (($ <foo> 1 2) #t))
(equal? b c)))))
;; This is actually in (guix store).
(test-equal "store-path-package-name"
"bash-4.2-p24"
(store-path-package-name
"/nix/store/qvs2rj2ia5vci3wsdb7qvydrmacig4pg-bash-4.2-p24"))
(test-end)


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