37 lines
1.6 KiB
Bash
Executable File
37 lines
1.6 KiB
Bash
Executable File
#!/bin/busybox sh
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# SPDX-FileCopyrightText: Copyright 2022-2023, macmpi
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# SPDX-License-Identifier: MIT
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# script meant to be run on Alpine (busybox) or on Ubuntu
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# verify busybox build options if eventually using other platforms
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command -v doas > /dev/null || alias doas="/usr/bin/sudo"
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build_path="$(mktemp -d)"
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if [ -n "$build_path" ]; then
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# prefer timestamp option for touch as it works on directories too
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t_stamp="$( TZ=UTC date +%Y%m%d0000.00 )"
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cp -a overlay "$build_path"/.
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find "$build_path"/overlay/ -exec sh -c 'TZ=UTC touch -chm -t "$0" "$1"' "$t_stamp" {} \;
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# setting modes and owner/groups for runtime (won't affect mtime)
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find "$build_path"/overlay/etc -type d -exec chmod 755 {} \;
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chmod 755 "$build_path"/overlay/etc/init.d/*
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chmod 755 "$build_path"/overlay/etc/runlevels/default/*
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chmod 777 "$build_path"/overlay/tmp
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chmod 700 "$build_path"/overlay/tmp/.trash
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chmod -R 600 "$build_path"/overlay/tmp/.trash/ssh_host_*_key
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find "$build_path"/overlay/usr -type d -exec chmod 755 {} \;
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chmod 755 "$build_path"/overlay/usr/local/bin/*
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doas chown -Rh 0:0 "$build_path"/overlay/*
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# busybox config on Alpine & Ubuntu has FEATURE_TAR_GNU_EXTENSIONS
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# (will preserve user/group/modes & mtime) and FEATURE_TAR_LONG_OPTIONS
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# shellcheck disable=SC2046 # we want word splitting as result of find
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doas tar cv -C "$build_path"/overlay --no-recursion \
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$(doas find "$build_path"/overlay/ | sed "s|$build_path/overlay/||" | sort | xargs ) | \
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gzip -c9n > headless.apkovl.tar.gz
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TZ=UTC touch -cm -t "$t_stamp" headless.apkovl.tar.gz
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doas rm -rf "$build_path"
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fi
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