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add comment about cpio creation

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This commit is contained in:
Tobias Powalowski 2024-07-17 07:03:18 +02:00
parent 4739557062
commit a92633a10c
1 changed files with 10 additions and 1 deletions
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11
usr/lib/archboot/cpio/cpio.sh
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@ -246,9 +246,17 @@ _install_libs() {
}
_create_cpio() {
# Reproducibility:
# set all timestamps to 0
# fd . -u --min-depth 1 -X touch -hcd "@0"
# Pipe needed as is, bsdcpio is not reproducible!
# cpio, pax, tar are slower than bsdtar!
# LC_ALL=C.UTF-8 bsdtar --null -cnf - -T - |
# LC_ALL=C.UTF-8 bsdtar --null -cf - --format=newc @-
# Result:
# Multi CPIO archive, extractable with 3cpio
pushd "${_ROOTFS}" >"${_NO_LOG}" || return
echo "Creating initramfs:"
# Reproducibility: set all timestamps to 0
fd . -u --min-depth 1 -X touch -hcd "@0"
echo "Appending directories..."
fd . -u -t d -0 | sort -z |
@ -258,6 +266,7 @@ _create_cpio() {
fd . -t f -t l -u -e 'bz2' -e 'gz' -e 'xz' -e 'zst' --min-depth 1 -0 | sort -z |
LC_ALL=C.UTF-8 bsdtar --null -cnf - -T - |
LC_ALL=C.UTF-8 bsdtar --null -cf - --format=newc @- >> "${_GENERATE_IMAGE}" || _abort "Image creation failed!"
echo "Removing compressed files..."
fd . -u -e 'bz2' -e 'gz' -e 'xz' -e 'zst' --min-depth 1 -X rm
fd . -u --min-depth 1 -X touch -hcd "@0"
echo "Appending zstd compressed image..."