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system: Prevent grub.cfg from being GC'd. 

* guix/build/install.scm (install-grub): Use 'copy-file' instead of
  'symlink' for GRUB.CFG.
This commit is contained in:
Ludovic Courtès 2014-05-18 22:06:38 +02:00
parent d5b429abda
commit 6ffd11f129
1 changed files with 12 additions and 5 deletions
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17
guix/build/install.scm
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@ -38,11 +38,18 @@
(define* (install-grub grub.cfg device mount-point)
"Install GRUB with GRUB.CFG on DEVICE, which is assumed to be mounted on
MOUNT-POINT. Return #t on success."
(mkdir-p (string-append mount-point "/boot/grub"))
(symlink grub.cfg (string-append mount-point "/boot/grub/grub.cfg"))
(zero? (system* "grub-install" "--no-floppy"
"--boot-directory" (string-append mount-point "/boot")
device)))
(let* ((target (string-append mount-point "/boot/grub/grub.cfg"))
(pivot (string-append target ".new")))
(mkdir-p (dirname target))
;; Copy GRUB.CFG instead of just symlinking it since it's not a GC root.
;; Do that atomically.
(copy-file grub.cfg pivot)
(rename-file pivot target)
(zero? (system* "grub-install" "--no-floppy"
"--boot-directory" (string-append mount-point "/boot")
device))))
(define (evaluate-populate-directive directive target)
"Evaluate DIRECTIVE, an sexp describing a file or directory to create under