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authorLudovic Courtès <ludo@gnu.org>2017-06-30 00:04:38 +0200
committerLudovic Courtès <ludo@gnu.org>2017-06-30 00:16:50 +0200
commita8ac4f081a9a679498ea42ccfe001f218bba3043 (patch)
tree7c5d85cc5d3d52ecb1c482bfde52c4755b48a8bb /gnu/build
parenta2cf57e79e0c1ca59ff854c12ece178a73fe224d (diff)
vm: Estimate the disk size by default.
* gnu/build/vm.scm (estimated-partition-size): New procedure. * gnu/system/vm.scm (expression->derivation-in-linux-vm): Change #:disk-image-size default to 'guess. [builder]: When DISK-IMAGE-SIZE is 'guess, use 'estimated-partition-size' and compute and estimate of the image size. (qemu-image): Likewise. * guix/build/store-copy.scm (file-size, closure-size): New procedures. * guix/scripts/system.scm (%default-options): Change 'image-size' to 'guess. * doc/guix.texi (Building the Installation Image): Remove '--image-size' flag from example. (Invoking guix system): Document the image size estimate.
Diffstat (limited to 'gnu/build')
-rw-r--r--gnu/build/vm.scm7
1 files changed, 7 insertions, 0 deletions
diff --git a/gnu/build/vm.scm b/gnu/build/vm.scm
index 7d5e613956..d0bc8c3033 100644
--- a/gnu/build/vm.scm
+++ b/gnu/build/vm.scm
@@ -46,6 +46,7 @@
partition-flags
partition-initializer
+ estimated-partition-size
root-partition-initializer
initialize-partition-table
initialize-hard-disk))
@@ -150,6 +151,12 @@ the #:references-graphs parameter of 'derivation'."
(flags partition-flags (default '()))
(initializer partition-initializer (default (const #t))))
+(define (estimated-partition-size graphs)
+ "Return the estimated size of a partition that can store the store items
+given by GRAPHS, a list of file names produced by #:references-graphs."
+ ;; Simply add a 20% overhead.
+ (round (* 1.2 (closure-size graphs))))
+
(define (fold2 proc seed1 seed2 lst) ;TODO: factorize
"Like `fold', but with a single list and two seeds."
(let loop ((result1 seed1)