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64 lines
2.1 KiB
Bash
64 lines
2.1 KiB
Bash
#!/bin/sh
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set -exu
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rootdir="$1"
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if [ -e "$rootdir/var/lib/dpkg/arch" ]; then
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chrootarch=$(head -1 "$rootdir/var/lib/dpkg/arch")
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else
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chrootarch=$(dpkg --print-architecture)
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fi
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eval $(apt-config shell trusted Dir::Etc::trusted/f)
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eval $(apt-config shell trustedparts Dir::Etc::trustedparts/d)
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tmpfile=$(mktemp --tmpdir="$rootdir/tmp")
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cat << END > "$tmpfile"
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Apt::Architecture "$chrootarch";
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Apt::Architectures "$chrootarch";
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Dir "$rootdir";
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Dir::Etc::Trusted "$trusted";
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Dir::Etc::TrustedParts "$trustedparts";
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END
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# we run "apt-get download --print-uris" in a temporary directory, to make sure
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# that the packages do not already exist in the current directory, or otherwise
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# nothing will be printed for them
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tmpdir=$(mktemp --directory --tmpdir="$rootdir/tmp")
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env --chdir="$tmpdir" APT_CONFIG="$tmpfile" apt-get download --print-uris eatmydata libeatmydata1 \
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| sed -ne "s/^'\([^']\+\)'\s\+\([^\s]\+\)\s\+\([0-9]\+\)\s\+\(SHA256:[a-f0-9]\+\)$/\1 \2 \3 \4/p" \
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| while read uri fname size hash; do
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echo "processing $fname" >&2
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if [ -e "$tmpdir/$fname" ]; then
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echo "$tmpdir/$fname already exists" >&2
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exit 1
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fi
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env --chdir="$tmpdir" APT_CONFIG="$tmpfile" /usr/lib/apt/apt-helper download-file "$uri" "$fname" Checksum-FileSize:"$size" "$hash"
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case "$fname" in
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eatmydata_*_all.deb)
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mkdir -p "$rootdir/usr/bin"
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dpkg-deb --fsys-tarfile "$tmpdir/$fname" \
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| tar --directory="$rootdir/usr/bin" --strip-components=3 --extract --verbose ./usr/bin/eatmydata
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;;
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libeatmydata1_*_$chrootarch.deb)
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libdir="/usr/lib/$(dpkg-architecture -a $chrootarch -q DEB_HOST_MULTIARCH)"
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mkdir -p "$rootdir$libdir"
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dpkg-deb --fsys-tarfile "$tmpdir/$fname" \
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| tar --directory="$rootdir$libdir" --strip-components=4 --extract --verbose --wildcards ".$libdir/libeatmydata.so*"
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;;
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*)
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echo "unexpected filename: $fname" >&2
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exit 1
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;;
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esac
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rm "$tmpdir/$fname"
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done
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rm "$tmpfile"
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rmdir "$tmpdir"
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mv "$rootdir/usr/bin/dpkg" "$rootdir/usr/bin/dpkg.orig"
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cat << END > "$rootdir/usr/bin/dpkg"
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#!/bin/sh
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exec /usr/bin/eatmydata /usr/bin/dpkg.orig "\$@"
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END
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chmod +x "$rootdir/usr/bin/dpkg"
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