Hi, Tomáš Čech <sleep_wal...@gnu.org> skribis:
> I'm playing a bit with initrd and I miss there a way, how to add > additional content to the image (busybox in my case now). Is there > really no way yet how to do that? The initrd automatically contains everything the given gexp refers to: --8<---------------cut here---------------start------------->8--- scheme@(guile-user)> ,use(guix) scheme@(guile-user)> ,use(gnu system linux-initrd) scheme@(guile-user)> ,use(gnu packages busybox) scheme@(guile-user)> ,enter-store-monad store-monad@(guile-user) [1]> (expression->initrd #~(execl (string-append #$busybox "/bin/uname") "uname" "-a")) $2 = #<derivation /gnu/store/ns4abqm8llcm06r9wg8rrnaj5axvg3la-guile-initrd.drv => /gnu/store/5m2vp3z30b8f9yxv6yqa0x5imssl2qvr-guile-initrd 377cc30> store-monad@(guile-user) [1]> (built-derivations (list $2)) [...] --8<---------------cut here---------------end--------------->8--- … and then: --8<---------------cut here---------------start------------->8--- $ gunzip < /gnu/store/5m2vp3z30b8f9yxv6yqa0x5imssl2qvr-guile-initrd/initrd | cpio -tv|grep busybox.*bin/uname lrwxrwxrwx 1 root root 7 Jan 1 1970 ./gnu/store/0rgimvxi572zncpr87q3867hkwkfmlva-busybox-1.25.0/bin/uname -> busybox 106143 blocks --8<---------------cut here---------------end--------------->8--- > In expression->initrd it refers to closure yet I fail to find how is > it found/constructed... If you look at the definition of ‘expression->initrd’, you’ll see that it turns the given gexp into a script using ‘gexp->script’. In the example above, said script refers to Busybox, because our expression refers to Busybox. Then, ‘expression->initrd’ queries the closure of this script via #:references-graphs and populates the initrd with exclusively what’s in that closure. In this example, the closure includes Busybox and Guile. Very short introduction, but I hope it helps! Ludo’.
