diff options
Diffstat (limited to 'guix/import/utils.scm')
| -rw-r--r-- | guix/import/utils.scm | 48 |
1 files changed, 47 insertions, 1 deletions
diff --git a/guix/import/utils.scm b/guix/import/utils.scm index 062cfc54f3..969491d28d 100644 --- a/guix/import/utils.scm +++ b/guix/import/utils.scm @@ -20,7 +20,16 @@ #:use-module (ice-9 match) #:use-module (ice-9 regex) #:use-module (srfi srfi-1) - #:export (factorize-uri)) + #:use-module (guix hash) + #:use-module (guix utils) + #:use-module ((guix build download) #:prefix build:) + #:export (factorize-uri + + hash-table->alist + flatten + assoc-ref* + + url-fetch)) (define (factorize-uri uri version) "Factorize URI, a package tarball URI as a string, such that any occurrences @@ -49,3 +58,40 @@ of the string VERSION is replaced by the symbol 'version." result)))) '() indices)))))) + +(define (hash-table->alist table) + "Return an alist represenation of TABLE." + (map (match-lambda + ((key . (lst ...)) + (cons key + (map (lambda (x) + (if (hash-table? x) + (hash-table->alist x) + x)) + lst))) + ((key . (? hash-table? table)) + (cons key (hash-table->alist table))) + (pair pair)) + (hash-map->list cons table))) + +(define (flatten lst) + "Return a list that recursively concatenates all sub-lists of LST." + (fold-right + (match-lambda* + (((sub-list ...) memo) + (append (flatten sub-list) memo)) + ((elem memo) + (cons elem memo))) + '() lst)) + +(define (assoc-ref* alist key . rest) + "Return the value for KEY from ALIST. For each additional key specified, +recursively apply the procedure to the sub-list." + (if (null? rest) + (assoc-ref alist key) + (apply assoc-ref* (assoc-ref alist key) rest))) + +(define (url-fetch url file-name) + "Save the contents of URL to FILE-NAME. Return #f on failure." + (parameterize ((current-output-port (current-error-port))) + (build:url-fetch url file-name))) |