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| author | Ludovic Courtès <ludo@gnu.org> | 2014-11-22 12:32:32 +0100 |
|---|---|---|
| committer | Ludovic Courtès <ludo@gnu.org> | 2014-11-22 12:32:32 +0100 |
| commit | e6039b9c70c658d648723a2d331f1c9637b49126 (patch) | |
| tree | 51507be7c3695b2f65c45201a15e47e03ff83591 /guix/build/utils.scm | |
| parent | e56512125d808522325324b99eaf966d8272355e (diff) | |
| download | guix-patches-e6039b9c70c658d648723a2d331f1c9637b49126.tar guix-patches-e6039b9c70c658d648723a2d331f1c9637b49126.tar.gz | |
utils: Export 'parallel-job-count'.
* guix/build/utils.scm (parallel-job-count): New procedure.
* guix/build/gnu-build-system.scm (%parallel-job-count): Remove.
(build, check): Use 'parallel-job-count' instead.
Diffstat (limited to 'guix/build/utils.scm')
| -rw-r--r-- | guix/build/utils.scm | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/guix/build/utils.scm b/guix/build/utils.scm index cda4fb12ef..bfbc4dd43e 100644 --- a/guix/build/utils.scm +++ b/guix/build/utils.scm @@ -31,6 +31,8 @@ #:re-export (alist-cons alist-delete) #:export (%store-directory + parallel-job-count + directory-exists? executable-file? call-with-ascii-input-file @@ -69,6 +71,14 @@ (or (getenv "NIX_STORE") "/gnu/store")) +(define (parallel-job-count) + "Return the number of processes to be passed next to GNU Make's `-j' +argument." + (match (getenv "NIX_BUILD_CORES") ;set by the daemon + (#f 1) + ("0" (current-processor-count)) + (x (or (string->number x) 1)))) + (define (directory-exists? dir) "Return #t if DIR exists and is a directory." (let ((s (stat dir #f))) |