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5a8147479e
To achieve reproducible results, `cpio` archive members are added in sorted order and inodes renumbered. The `cpio-clean.pl` script is made obsolete by setting mtimes via `touch` & using `cpio --reproducible`. Suggested by @dezgeg in https://github.com/NixOS/nixpkgs/pull/21273#issuecomment-268116605. Note that using `--reproducible` means that initial ramdisk creation now requires at least `cpio` version 2.12 (released in 2015).
49 lines
1.1 KiB
Bash
49 lines
1.1 KiB
Bash
source $stdenv/setup
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set -o pipefail
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objects=($objects)
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symlinks=($symlinks)
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suffices=($suffices)
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mkdir root
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# Needed for splash_helper, which gets run before init.
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mkdir root/dev
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mkdir root/sys
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mkdir root/proc
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for ((n = 0; n < ${#objects[*]}; n++)); do
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object=${objects[$n]}
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symlink=${symlinks[$n]}
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suffix=${suffices[$n]}
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if test "$suffix" = none; then suffix=; fi
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mkdir -p $(dirname root/$symlink)
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ln -s $object$suffix root/$symlink
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done
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# Get the paths in the closure of `object'.
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storePaths=$(perl $pathsFromGraph closure-*)
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# Paths in cpio archives *must* be relative, otherwise the kernel
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# won't unpack 'em.
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(cd root && cp -prd --parents $storePaths .)
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# Put the closure in a gzipped cpio archive.
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mkdir -p $out
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for PREP in $prepend; do
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cat $PREP >> $out/initrd
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done
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(cd root && find * -print0 | xargs -0r touch -h -d '@1')
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(cd root && find * -print0 | sort -z | cpio -o -H newc -R +0:+0 --reproducible --null | $compressor >> $out/initrd)
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if [ -n "$makeUInitrd" ]; then
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mv $out/initrd $out/initrd.gz
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mkimage -A arm -O linux -T ramdisk -C gzip -d $out/initrd.gz $out/initrd
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fi
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