nixpkgs/pkgs/build-support/kernel/make-initrd.nix
Arian van Putten b086b342bb build-support/make-initrd: Don't derive derivation name from file name
not all valid file names are valid derivation names. This can cause
troubles when, for example, trying to place systemd template unit
files, which contain an '@' in their name,  in an initrd.

Fixes #53987
2019-05-29 16:07:05 +02:00

54 lines
1.7 KiB
Nix

# Create an initial ramdisk containing the closure of the specified
# file system objects. An initial ramdisk is used during the initial
# stages of booting a Linux system. It is loaded by the boot loader
# along with the kernel image. It's supposed to contain everything
# (such as kernel modules) necessary to allow us to mount the root
# file system. Once the root file system is mounted, the `real' boot
# script can be called.
#
# An initrd is really just a gzipped cpio archive.
#
# Symlinks are created for each top-level file system object. E.g.,
# `contents = {object = ...; symlink = /init;}' is a typical
# argument.
{ stdenv, perl, cpio, contents, ubootTools
, name ? "initrd"
, compressor ? "gzip -9n"
, prepend ? []
, lib
}:
let
# !!! Move this into a public lib function, it is probably useful for others
toValidStoreName = x: with builtins;
lib.concatStringsSep "-" (filter (x: !(isList x)) (split "[^a-zA-Z0-9_=.?-]+" x));
in stdenv.mkDerivation rec {
inherit name;
builder = ./make-initrd.sh;
makeUInitrd = stdenv.hostPlatform.platform.kernelTarget == "uImage";
nativeBuildInputs = [ perl cpio ]
++ stdenv.lib.optional makeUInitrd ubootTools;
# !!! should use XML.
objects = map (x: x.object) contents;
symlinks = map (x: x.symlink) contents;
suffices = map (x: if x ? suffix then x.suffix else "none") contents;
# For obtaining the closure of `contents'.
# Note: we don't use closureInfo yet, as that won't build with nix-1.x.
# See #36268.
exportReferencesGraph =
lib.zipListsWith
(x: i: [("closure-${toValidStoreName (baseNameOf x.symlink)}-${toString i}") x.object])
contents
(lib.range 0 (lib.length contents - 1));
pathsFromGraph = ./paths-from-graph.pl;
inherit compressor prepend;
}