Hi,
Looking at this definition in gnu/system.scm [1] I am trying to figure
out what 'os' is:
(define* (operating-system-kernel-arguments
os root-device #:key (version %boot-parameters-version))
"Return all the kernel arguments, including the ones not specified directly
by the user. VERSION should match that of the target <boot-parameters> record
object that will contain the kernel parameters."
(append (bootable-kernel-arguments os root-device version)
(operating-system-user-kernel-arguments os)))
The same file also contains a record definition for <operating-system>
so it seemed reasonable to assume that 'os' referred to such a
record. In fact, the second procedure inside the 'append' above,
operating-system-user-kernel-arguments, is one of the accessors [2]
(even though the name does not match the field).
In the first procedure bootable-kernel-arguments [3] however, 'os'
(which is called 'system' there) is used like a string, although inside
a gexp:
(define* (bootable-kernel-arguments system root-device version)
"Return a list of kernel arguments (gexps) to boot SYSTEM from ROOT-DEVICE.
VERSION is the target version of the boot-parameters record."
;; If the version is newer than 0, we use the new style initrd parameter
;; names, otherwise we use the legacy ones. This is to maintain backward
;; compatibility when producing bootloader configurations for older
;; generations.
(define version>0? (> version 0))
(list (string-append (if version>0? "root=" "--root=")
;; Note: Always use the DCE format because that's what
;; (gnu build linux-boot) expects for the 'root'
;; kernel command-line option.
(file-system-device->string root-device
#:uuid-type 'dce))
#~(string-append (if #$version>0? "gnu.system=" "--system=") #$system)
#~(string-append (if #$version>0? "gnu.load=" "--load=")
#$system "/boot")))
I know objects in the store become paths when unquoted via '#$'. Does
that also work for Guix records declared via define-record-type* [4]
(please note the asterisk)? Thanks!
Kind regards
Felix
[1] https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/system.scm#n319
[2] https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/system.scm#n231
[3] https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/system.scm#n207
[4] https://git.savannah.gnu.org/cgit/guix.git/tree/guix/records.scm#n282
