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#!/bin/bash
# See tarcat for simple usage
is_flagged_for_list() {
#NOTE: Origins of these flags:
# "t" = tar
# "tf" = tar
# "Ot" = tar
# "Otf" = tar
# "l" = unrar, 7z
# "-l" = unzip, unrpa
if contains "$1" "l" "-l" "t" "tf" "Ot" "Otf"; then
return 0
fi
return 1
}
is_flagged_for_stdout() {
#NOTE: Origins of these flags:
# "Ox" = tar
# "Oxf" = tar
# "p" = unrar
# "-p" = unzip
# "x -so" = 7z
if contains "$1" "p" "-p" "Ox" "Oxf"; then
return 0
fi
return 1
}
unarchive() {
local tar_bin=/usr/bin/tar
local gpg_bin=/usr/bin/gpg
local age_bin=age
local unzip_bin=/usr/bin/unzip
local unrar_bin=/usr/bin/unrar
local unrpa_bin=unrpa
local _7z_bin=/usr/bin/7z
local decrypt=""
local decrypt_cmd=""
local decrypt_flags=""
local passphrase_flags=""
local passphrase=""
local unarchive_cmd=""
local unarchive_flags=""
local unarchive_late_flags=""
local to_directory=""
while [[ $# -gt 0 ]]; do
case $1 in
--archive=tar)
decrypt=0
decrypt_cmd=""
decrypt_flags=""
passphrase_flags=""
unarchive_cmd="${tar_bin}"
unarchive_flags="${unarchive_flags}xf"
unarchive_late_flags=""
shift
;;
--archive=tar.age)
decrypt=1
decrypt_cmd="${age_bin}"
decrypt_flags="${decrypt_flags} --decrypt"
passphrase_flags="--plaintext"
unarchive_cmd="${tar_bin}"
unarchive_flags="${unarchive_flags}x"
unarchive_late_flags=""
shift
;;
--archive=tar.gpg)
decrypt=1
decrypt_cmd="${gpg_bin}"
decrypt_flags="${decrypt_flags} --decrypt --quiet"
passphrase_flags="--batch --passphrase"
unarchive_cmd="${tar_bin}"
unarchive_flags="${unarchive_flags}x"
unarchive_late_flags=""
shift
;;
--archive=tar.gz)
decrypt=0
decrypt_cmd=""
decrypt_flags=""
passphrase_flags=""
unarchive_cmd="${tar_bin}"
unarchive_flags="${unarchive_flags}xzf"
unarchive_late_flags=""
shift
;;
--archive=tar.gz.age)
decrypt=1
decrypt_cmd="${age_bin}"
decrypt_flags="${decrypt_flags} --decrypt"
passphrase_flags="--plaintext"
unarchive_cmd="${tar_bin}"
unarchive_flags="${unarchive_flags}xz"
unarchive_late_flags=""
shift
;;
--archive=tar.gz.gpg)
decrypt=1
decrypt_cmd="${gpg_bin}"
decrypt_flags="${decrypt_flags} --decrypt --quiet"
passphrase_flags="--batch --passphrase"
unarchive_cmd="${tar_bin}"
unarchive_flags="${unarchive_flags}xz"
unarchive_late_flags=""
shift
;;
--archive=tar.xz)
decrypt=0
decrypt_cmd=""
decrypt_flags=""
passphrase_flags=""
unarchive_cmd="${tar_bin}"
unarchive_flags="${unarchive_flags}xJf"
unarchive_late_flags=""
shift
;;
--archive=tar.xz.age)
decrypt=1
decrypt_cmd="${age_bin}"
decrypt_flags="${decrypt_flags} --decrypt"
passphrase_flags="--plaintext"
unarchive_cmd="${tar_bin}"
unarchive_flags="${unarchive_flags}xJ"
unarchive_late_flags=""
shift
;;
--archive=tar.xz.gpg)
decrypt=1
decrypt_cmd="${gpg_bin}"
decrypt_flags="${decrypt_flags} --decrypt --quiet"
passphrase_flags="--batch --passphrase"
unarchive_cmd="${tar_bin}"
unarchive_flags="${unarchive_flags}xJ"
unarchive_late_flags=""
shift
;;
--archive=tar.zst)
decrypt=0
decrypt_cmd=""
decrypt_flags=""
passphrase_flags=""
unarchive_cmd="${tar_bin}"
unarchive_flags="${unarchive_flags}xf"
unarchive_late_flags="--zstd"
shift
;;
--archive=tar.zst.age)
decrypt=1
decrypt_cmd="${age_bin}"
decrypt_flags="${decrypt_flags} --decrypt"
passphrase_flags="--plaintext"
unarchive_cmd="${tar_bin}"
unarchive_flags="${unarchive_flags}x"
unarchive_late_flags="--zstd"
shift
;;
--archive=tar.zst.gpg)
decrypt=1
decrypt_cmd="${gpg_bin}"
decrypt_flags="${decrypt_flags} --decrypt --quiet"
passphrase_flags="--batch --passphrase"
unarchive_cmd="${tar_bin}"
unarchive_flags="${unarchive_flags}x"
unarchive_late_flags="--zstd"
shift
;;
--archive=tar.bz2)
decrypt=0
decrypt_cmd=""
decrypt_flags=""
passphrase_flags=""
unarchive_cmd="${tar_bin}"
unarchive_flags="${unarchive_flags}xjf"
unarchive_late_flags=""
shift
;;
--archive=tar.bz2.age)
decrypt=1
decrypt_cmd="${age_bin}"
decrypt_flags="${decrypt_flags} --decrypt"
passphrase_flags="--plaintext"
unarchive_cmd="${tar_bin}"
unarchive_flags="${unarchive_flags}xj"
unarchive_late_flags=""
shift
;;
--archive=tar.bz2.gpg)
decrypt=1
decrypt_cmd="${gpg_bin}"
decrypt_flags="${decrypt_flags} --decrypt --quiet"
passphrase_flags="--batch --passphrase"
unarchive_cmd="${tar_bin}"
unarchive_flags="${unarchive_flags}xj"
unarchive_late_flags=""
shift
;;
--archive=zip)
decrypt=0
decrypt_cmd=""
decrypt_flags=""
passphrase_flags=""
unarchive_cmd="${unzip_bin}"
if is_flagged_for_list "$unarchive_flags"; then
unarchive_flags="-l"
elif is_flagged_for_stdout "$unarchive_flags"; then
unarchive_flags="-p"
else
unarchive_flags=""
fi
unarchive_late_flags=""
shift
;;
--archive=rar)
decrypt=0
decrypt_cmd=""
decrypt_flags=""
passphrase_flags=""
unarchive_cmd="${unrar_bin}"
if is_flagged_for_list "$unarchive_flags"; then
unarchive_flags="l"
elif is_flagged_for_stdout "$unarchive_flags"; then
unarchive_flags="p"
else
unarchive_flags="x"
fi
unarchive_late_flags=""
shift
;;
--archive=rpa)
decrypt=0
decrypt_cmd=""
decrypt_flags=""
passphrase_flags=""
unarchive_cmd="${unrpa_bin}"
if is_flagged_for_list "$unarchive_flags"; then
unarchive_flags="-l"
elif is_flagged_for_stdout "$unarchive_flags"; then
error_msg "unrpa does not support --stdout"
else
unarchive_flags=""
fi
unarchive_late_flags=""
shift
;;
--archive=7z)
decrypt=0
decrypt_cmd=""
decrypt_flags=""
passphrase_flags=""
unarchive_cmd="${_7z_bin}"
if is_flagged_for_list "$unarchive_flags"; then
unarchive_flags="l -bso0 -bsp0"
elif is_flagged_for_stdout "$unarchive_flags"; then
unarchive_flags="x -so -bsp0"
else
unarchive_flags="x -bso0 -bsp0"
fi
unarchive_late_flags=""
shift
;;
--archive=*)
error_msg "unsupported archive type '${1}'"
;;
--directory)
to_directory="$2"
shift; shift
;;
--list)
case "$unarchive_cmd" in
"$unzip_bin")
#NOTE: `-l` is incompatible with all other flags, so overwrite
unarchive_flags="-l"
;;
"$unrar_bin")
#NOTE: `l` is incompatible with all other flags, so overwrite
unarchive_flags="l"
;;
"$unrpa_bin")
#NOTE: `-l` is incompatible with all other flags, so overwrite
unarchive_flags="-l"
;;
"$_7z_bin")
#NOTE: `l` is incompatible with all other flags, so overwrite
unarchive_flags="l -bso0 -bsp0"
;;
*)
#NOTE: `t` is incompatible with `x` (which I set by default), so partially overwrite
unarchive_flags="$(/usr/bin/sed -e 's/x/t/' <<<"$unarchive_flags")"
;;
esac
shift
;;
--passphrase)
passphrase="$2"
shift; shift
;;
--stdout)
case "$unarchive_cmd" in
"$unzip_bin")
#NOTE: `-p` is incompatible with all other flags, so overwrite
unarchive_flags="-p"
;;
"$unrar_bin")
#NOTE: `p` is incompatible with all other flags, so overwrite
unarchive_flags="p"
;;
"$unrpa_bin")
error_msg "unrpa does not support --stdout"
;;
"$_7z_bin")
#NOTE: `x` is incompatible with all other flags, so overwrite and append `-so`
unarchive_flags="x -so -bsp0"
;;
*)
#NOTE: while the effect is unusual, `O` is not incompatible with `x`/`t`, so append
unarchive_flags="O${unarchive_flags}"
;;
esac
shift
;;
*)
archive_fn="$(realpath "$1")"
shift
;;
esac
done
# error if archive does not exist
if [[ ! -f "$archive_fn" ]]; then
error_msg "no such archive '${archive_fn}'"
usage_msg
fi
# handle passphrase
if [[ ! -z "$passphrase_flags" && ! -z "$passphrase" ]]; then
passphrase_flags="${passphrase_flags} ${passphrase}"
else
passphrase_flags=
fi
# handle debugging information
local verbosity=/dev/stderr
if [[ "$verbose" -ne 1 ]]; then
verbosity=/dev/null
elif [[ "$decrypt" -eq 1 ]]; then
debug_msg "cd ${to_directory:-.} && $decrypt_cmd $decrypt_flags $archive_fn $passphrase_flags 2>$verbosity | $unarchive_cmd $unarchive_flags $unarchive_late_flags 2>$verbosity"
else
debug_msg "cd ${to_directory:-.} && $unarchive_cmd $unarchive_flags $archive_fn $unarchive_late_flags 2>$verbosity"
fi
# unarchive routine
if [[ ! -z "$to_directory" ]] && ! cd "$to_directory" >/dev/null 2> >(/usr/bin/sed -e "s/.*cd/cd/" >$verbosity); then
error_msg "could not access directory '${to_directory}'"
echo "ping"
fi
if [[ "$decrypt" -eq 1 ]]; then
( \
$decrypt_cmd $decrypt_flags $passphrase_flags "$archive_fn" 2>$verbosity \
|| error_msg "could not decrypt '${archive_fn}'" \
) \
| ( \
$unarchive_cmd $unarchive_flags $unarchive_late_flags 2>$verbosity \
|| error_msg "could not unarchive '${archive_fn}'" \
)
else
$unarchive_cmd $unarchive_flags "$archive_fn" $unarchive_late_flags 2>$verbosity \
|| error_msg "could not unarchive '${archive_fn}'"
fi
}