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-rw-r--r--gnu/packages.scm35
1 files changed, 27 insertions, 8 deletions
diff --git a/gnu/packages.scm b/gnu/packages.scm
index 9df3b975d5..ddabacd199 100644
--- a/gnu/packages.scm
+++ b/gnu/packages.scm
@@ -35,6 +35,7 @@
search-bootstrap-binary
%patch-directory
%bootstrap-binaries-path
+ %package-module-path
fold-packages
@@ -86,6 +87,12 @@
;; Absolute file name of the module hierarchy.
(dirname (search-path %load-path "guix.scm")))
+(define %package-module-path
+ ;; Search path for package modules. Each item must be either a directory
+ ;; name or a pair whose car is a directory and whose cdr is a sub-directory
+ ;; to narrow the search.
+ (list (cons %distro-root-directory "gnu/packages")))
+
(define* (scheme-files directory)
"Return the list of Scheme files found under DIRECTORY."
(file-system-fold (const #t) ; enter?
@@ -106,13 +113,12 @@
directory
stat))
-(define (file-name->module-name file)
- "Return the module name (a list of symbols) corresponding to FILE."
- (define not-slash
- (char-set-complement (char-set #\/)))
-
- (map string->symbol
- (string-tokenize (string-drop-right file 4) not-slash)))
+(define file-name->module-name
+ (let ((not-slash (char-set-complement (char-set #\/))))
+ (lambda (file)
+ "Return the module name (a list of symbols) corresponding to FILE."
+ (map string->symbol
+ (string-tokenize (string-drop-right file 4) not-slash)))))
(define* (package-modules directory #:optional sub-directory)
"Return the list of modules that provide packages for the distribution.
@@ -128,6 +134,19 @@ Optionally, narrow the search to SUB-DIRECTORY."
(string-append directory "/" sub-directory)
directory))))
+(define* (all-package-modules #:optional (path (%package-module-path)))
+ "Return the list of package modules found in PATH, a list of directories to
+search."
+ (fold-right (lambda (spec result)
+ (match spec
+ ((? string? directory)
+ (append (package-modules directory) result))
+ ((directory . sub-directory)
+ (append (package-modules directory sub-directory)
+ result))))
+ '()
+ path))
+
(define (fold-packages proc init)
"Call (PROC PACKAGE RESULT) for each available package, using INIT as
the initial value of RESULT. It is guaranteed to never traverse the
@@ -147,7 +166,7 @@ same package twice."
module)))
init
vlist-null
- (package-modules %distro-root-directory "gnu/packages"))))
+ (all-package-modules))))
(define* (find-packages-by-name name #:optional version)
"Return the list of packages with the given NAME. If VERSION is not #f,