diff options
Diffstat (limited to 'guix')
| -rw-r--r-- | guix/utils.scm | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/guix/utils.scm b/guix/utils.scm index 34a5e6c971..2814247a68 100644 --- a/guix/utils.scm +++ b/guix/utils.scm @@ -48,6 +48,7 @@ compile-time-value fcntl-flock memoize + strip-keyword-arguments default-keyword-arguments substitute-keyword-arguments @@ -424,6 +425,21 @@ exception if it's already taken." (hash-set! cache args results) (apply values results))))))) +(define (strip-keyword-arguments keywords args) + "Remove all of the keyword arguments listed in KEYWORDS from ARGS." + (let loop ((args args) + (result '())) + (match args + (() + (reverse result)) + (((? keyword? kw) arg . rest) + (loop rest + (if (memq kw keywords) + result + (cons* arg kw result)))) + ((head . tail) + (loop tail (cons head result)))))) + (define (default-keyword-arguments args defaults) "Return ARGS augmented with any keyword/value from DEFAULTS for keywords not already present in ARGS." |