mirror of
https://github.com/erenfro/gen2stage4.git
synced 2024-11-21 22:25:35 -05:00
163 lines
3.5 KiB
Bash
Executable file
163 lines
3.5 KiB
Bash
Executable file
#!/usr/bin/env bash
|
|
|
|
# get available compression types
|
|
declare -A compressTypes
|
|
compressTypes=(
|
|
["bz2"]="bzip2 pbzip2 lbzip2"
|
|
["gz"]="gzip pigz"
|
|
["lrz"]="lrzip"
|
|
["lz"]="lzip plzip"
|
|
["lz4"]="lz4"
|
|
["lzo"]="lzop"
|
|
["xz"]="xz pixz"
|
|
["zst"]="zstd"
|
|
)
|
|
declare -A compressAvail
|
|
for ext in "${!compressTypes[@]}"; do
|
|
for exechk in ${compressTypes[${ext}]}; do
|
|
binchk=$(command -v "${exechk}")
|
|
if [[ -n "$binchk" ]]; then
|
|
compressAvail+=(["${ext}"]="$binchk")
|
|
fi
|
|
done
|
|
done
|
|
|
|
# set flag variables to null/default
|
|
optQuiet=false
|
|
|
|
|
|
function showHelp() {
|
|
echo "Usage:"
|
|
echo "$(basename "$0") [-q ] [-s || -t <target>] <archivename> [-- [additional-tar-options]]"
|
|
echo
|
|
echo "-q activates quiet mode (no confirmation)"
|
|
echo "-s extracts archive in current directory"
|
|
echo "-t <path> extracts archive in target <path>"
|
|
echo "-h display this help message."
|
|
|
|
if [[ "$1" -ge 0 ]]; then
|
|
exit "$1"
|
|
else
|
|
exit 0
|
|
fi
|
|
}
|
|
|
|
function errorMsg() {
|
|
local rc=0
|
|
|
|
if [[ "$1" -gt 0 ]]; then
|
|
rc="$1"
|
|
shift
|
|
fi
|
|
|
|
echo "$*" >&2
|
|
|
|
if [[ "$rc" -gt 0 ]]; then
|
|
exit "$rc"
|
|
fi
|
|
}
|
|
|
|
|
|
# reads options:
|
|
tarArgs=()
|
|
while [[ $# -gt 0 ]]; do
|
|
while getopts ":t:sqh" flag; do
|
|
case "$flag" in
|
|
t) targetPath="$OPTARG";;
|
|
s) targetPath="$(pwd)";;
|
|
q) optQuiet=true;;
|
|
h) showHelp 0;;
|
|
\?) errorMsg 1 "Invalid option: -$OPTARG";;
|
|
:) errorMsg 1 "Option -$OPTARG requires an argument.";;
|
|
esac
|
|
done || exit 1
|
|
|
|
[[ $OPTIND -gt $# ]] && break # reached the end of parameters
|
|
|
|
shift $((OPTIND - 1)) # Free processed options so far
|
|
OPTIND=1 # we must reset OPTIND
|
|
if [[ -z "$archiveFile" ]]; then
|
|
archiveFile=$1
|
|
else
|
|
tarArgs[${#tarArgs[*]}]=$1
|
|
fi
|
|
shift # remove saved arg
|
|
done
|
|
|
|
# checks if run as root:
|
|
if [[ "$(id -u)" -ne 0 ]]; then
|
|
echo "$(basename "$0"): must run as root"
|
|
exit 250
|
|
fi
|
|
|
|
if [[ ! -r "$archiveFile" ]]; then
|
|
echo "ERROR: archive file (\`$archiveFile\`) does not exist"
|
|
exit 1
|
|
fi
|
|
|
|
archiveExt="${archiveFile##*.}"
|
|
|
|
if [[ "${archiveFile%%."$archiveExt"}" != *.tar ]]; then
|
|
echo "The stage file you are trying to unpack (\`$archiveFile\`) does not appear to be an archived TAR file"
|
|
echo "${archiveFile%%."$archiveExt"}"
|
|
exit 1
|
|
fi
|
|
|
|
if [[ -n "$targetPath" ]]; then
|
|
if [[ ! -d "$targetPath" ]]; then
|
|
echo "$(basename "$0"): target path '$targetPath' does not exist"
|
|
exit 1
|
|
fi
|
|
|
|
# make sure targetPath path ends with slash
|
|
if [[ "$targetPath" != */ ]]; then
|
|
targetPath="${targetPath}/"
|
|
fi
|
|
else
|
|
echo "ERROR: Neither -s or -t <path> provided"
|
|
exit 2
|
|
fi
|
|
|
|
# Check if specified type is available
|
|
if [[ -z "${compressAvail[$archiveExt]}" ]]; then
|
|
echo "$(basename "$0"): specified archive compression type not supported."
|
|
echo "Supported: ${compressAvail[*]}"
|
|
exit 1
|
|
fi
|
|
|
|
compressOptions=("${compressAvail[$archiveExt]}")
|
|
case "$archiveExt" in
|
|
xz) compressOptions+=("-T0");;
|
|
zst) compressOptions+=("-T0");;
|
|
esac
|
|
|
|
tarOptions=(
|
|
"-x"
|
|
"--xattrs-include=*.*"
|
|
"--numeric-owner"
|
|
"--use-compress-prog=${compressOptions[*]}"
|
|
)
|
|
|
|
tarOptions+=("${tarArgs[@]}")
|
|
|
|
|
|
# if not in optQuiet mode, this message will be displayed:
|
|
if ! $optQuiet; then
|
|
echo "Are you sure that you want to extract a stage archive to the system"
|
|
echo "to the destination path?"
|
|
echo "$targetPath"
|
|
echo
|
|
echo "COMMAND LINE PREVIEW:"
|
|
echo 'tar' "${tarOptions[@]}" -f "$archiveFile" -C "$targetPath"
|
|
echo
|
|
echo -n 'Type "yes" to continue or anything else to quit: '
|
|
read -r promptAgree
|
|
if [[ "${promptAgree,,}" == "yes" ]]; then
|
|
optQuiet=true
|
|
fi
|
|
fi
|
|
|
|
# start stage4 creation:
|
|
if $optQuiet; then
|
|
tar "${tarOptions[@]}" -f "$archiveFile" -C "$targetPath"
|
|
fi
|