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44 lines
1.6 KiB
44 lines
1.6 KiB
# Create an initial ramdisk containing the closure of the specified |
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# file system objects. An initial ramdisk is used during the initial |
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# stages of booting a Linux system. It is loaded by the boot loader |
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# along with the kernel image. It's supposed to contain everything |
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# (such as kernel modules) necessary to allow us to mount the root |
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# file system. Once the root file system is mounted, the `real' boot |
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# script can be called. |
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# |
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# An initrd is really just a gzipped cpio archive. |
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# |
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# Symlinks are created for each top-level file system object. E.g., |
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# `contents = {object = ...; symlink = /init;}' is a typical |
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# argument. |
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{ stdenv, perl, cpio, contents, ubootChooser, compressor, prepend }: |
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let |
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inputsFun = ubootName : [ perl cpio ] |
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++ stdenv.lib.optional (ubootName != null) [ (ubootChooser ubootName) ]; |
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makeUInitrdFun = ubootName : (ubootName != null); |
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in |
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stdenv.mkDerivation { |
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name = "initrd"; |
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builder = ./make-initrd.sh; |
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nativeBuildInputs = inputsFun stdenv.platform.uboot; |
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makeUInitrd = makeUInitrdFun stdenv.platform.uboot; |
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# !!! should use XML. |
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objects = map (x: x.object) contents; |
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symlinks = map (x: x.symlink) contents; |
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suffices = map (x: if x ? suffix then x.suffix else "none") contents; |
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# For obtaining the closure of `contents'. |
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exportReferencesGraph = |
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map (x: [("closure-" + baseNameOf x.symlink) x.object]) contents; |
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pathsFromGraph = ./paths-from-graph.pl; |
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crossAttrs = { |
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nativeBuildInputs = inputsFun stdenv.cross.platform.uboot; |
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makeUInitrd = makeUInitrdFun stdenv.cross.platform.uboot; |
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}; |
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inherit compressor prepend; |
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}
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