forked from josch/mmdebstrap
99 lines
3.7 KiB
Bash
Executable file
99 lines
3.7 KiB
Bash
Executable file
#!/bin/sh
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set -eu
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mirrordir="./mirror"
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mirror="http://deb.debian.org/debian"
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nativearch=$(dpkg --print-architecture)
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components=main
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if [ -e "$mirrordir/dists/unstable/Release" ]; then
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http_code=$(curl --output /dev/null --silent --location --head --time-cond "$mirrordir/dists/unstable/Release" --write-out '%{http_code}' "$mirror/dists/unstable/Release")
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case "$http_code" in
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200) ;; # need update
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304) echo up-to-date; exit 0;;
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*) echo unexpected status: $http_code; exit 1;;
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esac
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fi
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for dist in stable testing unstable; do
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rootdir=$(mktemp --directory)
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for p in /etc/apt/apt.conf.d /etc/apt/sources.list.d /etc/apt/preferences.d /var/cache/apt /var/lib/apt/lists/partial /var/lib/dpkg; do
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mkdir -p "$rootdir/$p"
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done
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cat << END > "$rootdir/etc/apt/apt.conf"
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Apt::Architecture "$nativearch";
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Dir::Etc "$rootdir/etc/apt";
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Dir::State "$rootdir/var/lib/apt";
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Dir::Cache "$rootdir/var/cache/apt";
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Apt::Install-Recommends false;
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Apt::Get::Download-Only true;
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Dir::Etc::Trusted "/etc/apt/trusted.gpg";
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Dir::Etc::TrustedParts "/etc/apt/trusted.gpg.d";
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END
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> "$rootdir/var/lib/dpkg/status"
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cat << END > "$rootdir/etc/apt/sources.list"
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deb [arch=$nativearch] $mirror $dist $components
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END
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APT_CONFIG="$rootdir/etc/apt/apt.conf" apt-get update
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pkgs=$(APT_CONFIG="$rootdir/etc/apt/apt.conf" apt-get indextargets \
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--format '$(FILENAME)' 'Created-By: Packages' "Architecture: $nativearch" \
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| xargs --delimiter='\n' /usr/lib/apt/apt-helper cat-file \
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| grep-dctrl --no-field-names --show-field=Package --exact-match \
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\( --field=Essential yes --or --field=Priority required \
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--or --field=Priority important --or --field=Priority standard \))
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pkgs="$(echo $pkgs) build-essential"
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APT_CONFIG="$rootdir/etc/apt/apt.conf" apt-get --yes install $pkgs
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# to be able to also test gpg verification, we need to create a mirror
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mkdir -p "$mirrordir/dists/$dist/" "$mirrordir/dists/$dist/main/binary-$nativearch/"
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curl --location "$mirror/dists/$dist/Release" > "$mirrordir/dists/$dist/Release"
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curl --location "$mirror/dists/$dist/Release.gpg" > "$mirrordir/dists/$dist/Release.gpg"
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curl --location "$mirror/dists/$dist/main/binary-$nativearch/Packages.gz" > "$mirrordir/dists/$dist/main/binary-$nativearch/Packages.gz"
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# the deb files downloaded by apt must be moved to their right locations in the
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# pool directory
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#
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# Instead of parsing the Packages file, we could also attempt to move the deb
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# files ourselves to the appropriate pool directories. But that approach
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# requires re-creating the heuristic by which the directory is chosen, requires
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# stripping the epoch from the filename and will break once mirrors change.
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# This way, it doesn't matter where the mirror ends up storing the package.
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gzip -dc "$mirrordir/dists/$dist/main/binary-$nativearch/Packages.gz" \
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| grep-dctrl --no-field-names --show-field=Package,Version,Architecture,Filename,MD5sum '' \
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| paste -sd " \n" \
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| while read name ver arch fname md5; do
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dir="${fname%/*}"
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basename="${fname##*/}"
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# apt stores deb files with the colon encoded as %3a while
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# mirrors do not contain the epoch at all #645895
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case "$ver" in *:*) ver="${ver%%:*}%3a${ver#*:}";; esac
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aptname="$rootdir/var/cache/apt/archives/${name}_${ver}_${arch}.deb"
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if [ -e "$aptname" ]; then
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# make sure that we found the right file by checking its hash
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echo "$md5 $aptname" | md5sum --check
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mkdir -p "$mirrordir/$dir"
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mv "$aptname" "$mirrordir/$fname"
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fi
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done
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rm "$rootdir/var/cache/apt/archives/lock"
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rmdir "$rootdir/var/cache/apt/archives/partial"
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# now the apt cache should be empty
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if [ ! -z "$(ls -1qA "$rootdir/var/cache/apt/archives/")" ]; then
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echo "/var/cache/apt/archives not empty"
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exit 1
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fi
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rm -r "$rootdir"
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done
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