dotfiles/scripts/debloc.sh

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#!/usr/bin/env bash
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# Installs Debian packages on a Debian system
# with no root access, in the user home
# (sourceable)
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if [ ! -f /etc/apt/sources.list ]; then
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# Not a Debian system
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return 0
fi
ARCH=$(dpkg --print-architecture)
DEBLOC_DB=$HOME/.config/debloc/$ARCH
DEBLOC_ROOT=$HOME/.debloc/$ARCH
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DEBLOC_LD=$DEBLOC_ROOT/ld
if [ -z $DEBIAN_MIRROR ]; then
DEBIAN_MIRROR=$(cat /etc/apt/sources.list | grep '^deb ' | grep main | grep -v security | grep -v updates | grep -v backports)
DEBIAN_MIRROR=$(echo $DEBIAN_MIRROR | head -1 | cut -d ' ' -f 2 | sed 's/\/$//')
fi
mkdir -p $DEBLOC_DB &> /dev/null
mkdir -p $DEBLOC_ROOT &> /dev/null
export PATH="$DEBLOC_ROOT/usr/bin:$DEBLOC_ROOT/usr/games/:$DEBLOC_ROOT/usr/lib/git-core:$PATH"
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export LD_LIBRARY_PATH="$DEBLOC_LD:$LD_LIBRARY_PATH"
export PYTHONPATH="$DEBLOC_ROOT/usr/lib/python3/dist-packages:$PYTHONPATH"
export QT_QPA_PLATFORM_PLUGIN_PATH="$DEBLOC_ROOT/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms"
# Tell if a package exists
function _debloc-exists { # package
if [[ -n $DEBIAN_DB && -f $DEBIAN_DB ]]; then
grep "^Package: $1\$" $DEBIAN_DB --quiet
else
LANG=C apt-cache show $1 &> /dev/null
fi
if [ $? == 0 ]; then
return 1
else
return 0
fi
}
# Return the real package associated with a virtual package
# If not a virtual package, return the input
function _debloc-filterVirtual { # package
pkg=$1
if [[ -n $DEBIAN_DB && -f $DEBIAN_DB ]]; then
echo $pkg
else
LANG=C apt-cache policy $1 | grep "Candidate" | grep "(none)" > /dev/null
if [ $? == 0 ]; then
# TODO This is not really accurate
LANG=C apt-cache showpkg $pkg | tail -1 | cut -d ' ' -f 1
else
echo $pkg
fi
fi
return 0
}
# Tell if a package is installed via debloc
function _debloc-locallyInstalled { # package
if [ -f $DEBLOC_DB/$1 ]; then
return 1
else
return 0
fi
}
# Tell if a package is installed system-wide
function _debloc-globallyInstalled { # package
STATUS=$(mktemp)
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LANG=C dpkg --list $1 &> $STATUS
if [ $? != 0 ]; then
rm -f $STATUS > /dev/null
return 0
fi
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cat $STATUS | grep '^Status:' | grep ' installed' --quiet
if [ $? != 0 ]; then
rm -f $STATUS > /dev/null
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return 0
else
rm -f $STATUS > /dev/null
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return 1
fi
}
# Get informations about a package
function _debloc-packageShow { # package
pkg=$1
if [[ -n $DEBIAN_DB && -f $DEBIAN_DB ]]; then
startline=$(grep "^Package: ${pkg}\$" $DEBIAN_DB --line-number | cut -d ':' -f 1)
sed -n $startline,$(expr $startline + 100)p $DEBIAN_DB | while read line; do
if [ -z "$line" ]; then
return 0
fi
echo $line
done
return 1
else
LANG=C apt-cache show $pkg | while read line; do
if [ -z "$line" ]; then
return 0
fi
echo $line
done
return 0
fi
}
# Get the path of a package
function _debloc-packagePath { # package
_debloc-packageShow $1 | grep "^Filename:" | head -1 | cut -d ':' -f 2 | sed -e 's/^[[:space:]]*//'
return 0
}
# Get the md5sum of a package
function _debloc-packageMd5sum { # package
_debloc-packageShow $1 | grep "^MD5sum:" | cut -d ':' -f 2 | sed -e 's/^[[:space:]]*//'
return 0
}
# Update symbolics links in $DEBLOC_ROOT/lib
function _debloc-ldconfig {
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mkdir -p $DEBLOC_LD &> /dev/null
rm -f $DEBLOC_LD &> /dev/null
find $DEBLOC_ROOT{/usr,}/lib -type f -name "*.so*" | while read lib; do
ln --symbolic --force "$lib" "$DEBLOC_LD/$(basename $lib)"
done &> /dev/null
find $DEBLOC_ROOT{/usr,}/lib -type l -name "*.so*" | while read link; do
yes | cp --force --no-dereference --preserve=links "$link" "$DEBLOC_LD" &> /dev/null
done &> /dev/null
}
# Install debian archive
function _debloc-installDeb { # path
TMP_DIR=$(mktemp -d) &> /dev/null
$(cd $TMP_DIR; ar x "$1")
TAR_FILE=$(find $TMP_DIR -type f -name "data.tar.*" | head -1)
if [ -e "$TAR_FILE" ]; then
# Output for DB saving
tar tf $TAR_FILE
tar xf $TAR_FILE -C $DEBLOC_ROOT
# _debloc-ldconfig
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mkdir -p $DEBLOC_LD &> /dev/null
tar tf $TAR_FILE | grep '^.\(/usr\)\?/lib/' | grep '\.so' | while read file; do
lib=$(readlink -f $DEBLOC_ROOT/$file)
if [ -f $lib ]; then
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ln --symbolic --force "$lib" "$DEBLOC_LD/$(basename $file)"
fi
if [ -h $lib ]; then
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yes | cp --force --no-dereference --preserve=links "$(basename $link)" "$DEBLOC_LD/" &> /dev/null
fi
done
fi
rm -rf $TMP_DIR &> /dev/null
return 0
}
# Install package
function _debloc-install { # package
pkg=$1
url=${DEBIAN_MIRROR}/$(_debloc-packagePath $pkg)
echo "→ Downloading $url"
DEB_FILE=$(mktemp) &> /dev/null
wget "$url" --quiet -O $DEB_FILE
if [ $? != 0 ]; then
echo "→ Failed!"
return 4
fi
echo "→ Verifying sums"
theo=$(_debloc-packageMd5sum $pkg)
real=$(md5sum $DEB_FILE | cut -d ' ' -f 1)
if [ "$theo" != "$real" ]; then
rm -f $DEB_FILE &> /dev/null
echo "→ Failed!"
return 5
fi
echo "→ Installing"
_debloc-installDeb $DEB_FILE > $DEBLOC_DB/$pkg
echo "→ Done!"
rm -f $DEB_FILE &> /dev/null
return 0
}
# Get the dependencies of a package
function _debloc-packageDeps { # package
_debloc-packageShow $1 | grep '^Depends:' | sed 's/Depends: //' | sed 's/, /\n/g' | cut -d ' ' -f 1
return 0
}
# Install package with dependencies
function _debloc-installDeps { # package
pkg=$1
echo "Installing $pkg"
_debloc-packageDeps $pkg | while read dep; do
dep=$(_debloc-filterVirtual $dep)
_debloc-locallyInstalled $dep
if [ $? == 1 ]; then
echo "- Dependency $dep is already installed with Debloc"
continue
fi
_debloc-globallyInstalled $dep
if [ $? == 1 ]; then
echo "- Dependency $dep is already installed on the system"
continue
fi
_debloc-installDeps $dep | while read line; do echo "- $line"; done
done
_debloc-install $pkg
return 0
}
# Install package with dependencies (user version with verifications)
function debloc-install { # package
for pkg in $*; do
pkg=$(_debloc-filterVirtual $pkg)
_debloc-exists $pkg
if [ $? == 0 ]; then
echo "Unknown package $pkg"
continue
fi
_debloc-locallyInstalled $pkg
if [ $? == 1 ]; then
echo "Package $pkg is already installed with Debloc"
continue
fi
_debloc-globallyInstalled $pkg
if [ $? == 1 ]; then
echo "Package $pkg is already installed on the system"
continue
fi
_debloc-installDeps $pkg
done
return 0
}
# Install debian archive (user version with verifications)
function debloc-deb { # path
for path in $*; do
if [ ! -f "$path" ]; then
echo "$path is not a file"
return 6
fi
echo "Installing $(basename $path)"
_debloc-installDeb "$(readlink -f $path)" > $DEBLOC_DB/$(basename $path)
done
return 0
}
# Remove every package installed with Debloc
function debloc-flush {
rm -rf $DEBLOC_ROOT/* &> /dev/null
rm -f $DEBLOC_DB/* &> /dev/null
}