pull debian package (or ubuntu, or whatever)

debian-package.sh

# obtains debian packages

# Examples:
# gimp on current directory from debian 6
# curl -L https://goo.gl/jruRgy | bash -s gimp

# gimp on directory gimp-install-dir
# curl -L https://goo.gl/jruRgy | bash -s gimp gimp-install-dir

# only partial package of gimp (/usr/bin)
# curl -L https://goo.gl/jruRgy | bash -s gimp gimp-install-dir ./usr/bin/

# only partial package of gimp (/usr/bin /usr/lib)
# curl -L https://goo.gl/jruRgy | bash -s gimp gimp-install-dir './usr/bin/ ./usr/lib/'

# firefox from linux mint sonya (upstream package)
# curl -L https://goo.gl/jruRgy | bash -s firefox firefox-from-mint '' http://packages.linuxmint.com/ sonya '' upstream/binary

# gimp from ubuntu xenial
# curl -L https://goo.gl/jruRgy | bash -s gimp gimp-from-xenial '' http://archive.ubuntu.com/ubuntu xenial '' universe

package=${1}
target_dir=${2:-.}
files=${3} # ./usr/sbin/debootstrap

if [ -z "${package}" ]; then
    package=debootstrap
    files=./usr/sbin/debootstrap
fi

distro_url=${4:-http://archive.debian.org/debian}
branch=${5:-Debian-6.0}
arch=${6:-i386}
content_filter=${7:-main/binary}

branch_url="${distro_url}/dists/${branch}"
release_url="${branch_url}/Release"

# obtain release content from distro
release_contents=$(curl ${release_url} | egrep 'Packages' | grep ${arch} | grep ${content_filter})
valid_packages_url=''
# main upstream import backport romeo universe multiverse

# check valid provided url for packages
while read -r release_content; do
    packages_url=$(set -- ${release_content}; echo $3)
    http_code=$(curl --silent --output /dev/null --head --write-out %{http_code} ${branch_url}/${packages_url})
    if [ "${http_code}" -ne '200' ]; then
        "non reachable ${branch_url}/${packages_url}"
    else 
        valid_packages_url=${packages_url}
        break
    fi
done <<< "$release_contents"

if [ -z "${valid_packages_url}" ]; then
    echo "could not obtain packages url for ${arch} branch ${branch} from distribution ${distro_url}" 1>&2
    exit 1
fi

echo "Found packages ${valid_packages_url}"

# retrieve and extract package list
decompress='cat --'
if [[ ${valid_packages_url} =~ .bz2$ ]]; then
    decompress='bzip2 -d'
elif [[ ${valid_packages_url} =~ .gz ]]; then
    decompress='gunzip'
fi

packages=$(curl ${branch_url}/${packages_url} | ${decompress})

# look for requested package
filename=$(cat <<PACKAGES | egrep -A20 '^Package: '$(echo $package | sed 's/[]\.|$(){}?+*^]/\\&/g')'$' | grep '^Filename' | head -n1
${packages}
PACKAGES
)
set -- $filename
filename=$2

if [ -z "${filename}" ]; then
    echo "could not find package ${package}" 1>&2
    exit 2
fi

echo "Found package ${filename}"

# retrieve and unpackage
mkdir -p ${target_dir}/temp >/dev/null 2>&1
pushd ${target_dir}/temp
curl ${distro_url}/${filename} > package.deb
ar x package.deb
echo 'Package content: '
find . -type f | sed 's#^#    > #g'
cd ..
tar -xvf temp/data.tar.* ${files}
if [ $? -ne 0 ]; then
    echo "could not extract specified files from package ($files)" 1>&2
    echo "actual content of package: " 1>&2
    tar -tf temp/data.tar.* | sed 's#^#    > #g' 1>&2
fi
rm -Rf temp

cat <<PACKAGES > packages
${packages}
PACKAGES
popd