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#!/bin/bash
# See mktar-batch for simple usage
archive() {
local tar_bin=/usr/bin/tar
local gpg_bin=/usr/bin/gpg
local age_bin=age
local encrypt=""
local encrypt_cmd=""
local encrypt_flags=""
local passphrase_flags=""
local passphrase=""
local archive_cmd=""
local archive_flags=""
local archive_late_flags=""
local archive_fn=""
local positional=()
while [[ $# -gt 0 ]]; do
case $1 in
--archive=tar)
encrypt=0
encrypt_cmd=""
encrypt_flags=""
passphrase_flags=""
archive_cmd="${tar_bin}"
archive_flags="${archive_flags}cf"
archive_late_flags=""
shift
;;
--archive=tar.age)
encrypt=1
encrypt_cmd="${age_bin}"
encrypt_flags="${encrypt_flags} --encrypt --passphrase --output"
passphrase_flags="--plaintext"
archive_cmd="${tar_bin}"
archive_flags="${archive_flags}c"
archive_late_flags=""
shift
;;
--archive=tar.gpg)
encrypt=1
encrypt_cmd="${gpg_bin}"
encrypt_flags="${encrypt_flags} --symmetric --output"
passphrase_flags="--batch --passphrase"
archive_cmd="${tar_bin}"
archive_flags="${archive_flags}c"
archive_late_flags=""
shift
;;
--archive=tar.gz)
encrypt=0
encrypt_cmd=""
encrypt_flags=""
passphrase_flags=""
archive_cmd="${tar_bin}"
archive_flags="${archive_flags}czf"
archive_late_flags=""
shift
;;
--archive=tar.gz.age)
encrypt=1
encrypt_cmd="${age_bin}"
encrypt_flags="${encrypt_flags} --encrypt --passphrase --output"
passphrase_flags="--plaintext"
archive_cmd="${tar_bin}"
archive_flags="${archive_flags}cz"
archive_late_flags=""
shift
;;
--archive=tar.gz.gpg)
encrypt=1
encrypt_cmd="${gpg_bin}"
encrypt_flags="${encrypt_flags} --symmetric --output"
passphrase_flags="--batch --passphrase"
archive_cmd="${tar_bin}"
archive_flags="${archive_flags}cz"
archive_late_flags=""
shift
;;
--archive=tar.xz)
encrypt=0
encrypt_cmd=""
encrypt_flags=""
passphrase_flags=""
archive_cmd="${tar_bin}"
archive_flags="${archive_flags}cJf"
archive_late_flags=""
shift
;;
--archive=tar.xz.age)
encrypt=1
encrypt_cmd="${age_bin}"
encrypt_flags="${encrypt_flags} --encrypt --passphrase --output"
passphrase_flags="--plaintext"
archive_cmd="${tar_bin}"
archive_flags="${archive_flags}cJ"
archive_late_flags=""
shift
;;
--archive=tar.xz.gpg)
encrypt=1
encrypt_cmd="${gpg_bin}"
encrypt_flags="${encrypt_flags} --symmetric --output"
passphrase_flags="--batch --passphrase"
archive_cmd="${tar_bin}"
archive_flags="${archive_flags}cJ"
archive_late_flags=""
shift
;;
--archive=tar.zst)
encrypt=0
encrypt_cmd=""
encrypt_flags=""
passphrase_flags=""
archive_cmd="${tar_bin}"
archive_flags="${archive_flags}cf"
archive_late_flags="--zstd"
shift
;;
--archive=tar.zst.age)
encrypt=1
encrypt_cmd="${age_bin}"
encrypt_flags="${encrypt_flags} --encrypt --passphrase --output"
passphrase_flags="--plaintext"
archive_cmd="${tar_bin}"
archive_flags="${archive_flags}c"
archive_late_flags="--zstd"
shift
;;
--archive=tar.zst.gpg)
encrypt=1
encrypt_cmd="${gpg_bin}"
encrypt_flags="${encrypt_flags} --symmetric --output"
passphrase_flags="--batch --passphrase"
archive_cmd="${tar_bin}"
archive_flags="${archive_flags}c"
archive_late_flags="--zstd"
shift
;;
--archive=tar.bz2)
encrypt=0
encrypt_cmd=""
encrypt_flags=""
passphrase_flags=""
archive_cmd="${tar_bin}"
archive_flags="${archive_flags}cjf"
archive_late_flags=""
shift
;;
--archive=tar.bz2.age)
encrypt=1
encrypt_cmd="${age_bin}"
encrypt_flags="${encrypt_flags} --encrypt --passphrase --output"
passphrase_flags="--plaintext"
archive_cmd="${tar_bin}"
archive_flags="${archive_flags}cj"
archive_late_flags=""
shift
;;
--archive=tar.bz2.gpg)
encrypt=1
encrypt_cmd="${gpg_bin}"
encrypt_flags="${encrypt_flags} --symmetric --output"
passphrase_flags="--batch --passphrase"
archive_cmd="${tar_bin}"
archive_flags="${archive_flags}cj"
archive_late_flags=""
shift
;;
--archive=*)
error_msg "unsupported archive type '${1}'"
;;
--name)
archive_fn="$2"
shift; shift
;;
--passphrase)
passphrase="$2"
shift; shift
;;
*)
positional+=("$1")
shift
;;
esac
done
# error if no input files given
if [[ "${#positional[@]}" -lt 1 ]]; then
error_msg "no input files given"
usage_msg
fi
# error if input file does not exist
for target in "${positional[@]}"; do
if [[ ! -f "$target" ]] && [[ ! -d "$target" ]]; then
error_msg "no such file '${target}'"
fi
done
# error if no archive file given
if [[ -z "$archive_fn" ]]; then
error_msg "no archive file given"
usage_msg
fi
# error if archive exists and should not be overwritten
if ! prompt_overwrite "$archive_fn"; then
error_msg "archive '${archive_fn}' cannot be overwritten"
usage_msg
fi
# error if archive is an input file
if contains "$archive_fn" "${positional[@]}"; then
error_msg "archive '${archive_fn}' cannot be an input file"
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 [[ "$encrypt" -eq 1 ]]; then
debug_msg "$archive_cmd $archive_flags $archive_late_flags ${positional[@]} 2>$verbosity | $encrypt_cmd $encrypt_flags $archive_fn $passphrase_flags 2>$verbosity"
else
debug_msg "$archive_cmd $archive_flags $archive_fn $archive_late_flags ${positional[@]} 2>$verbosity"
fi
# archive routine
if [[ "$encrypt" -eq 1 ]]; then
( \
$archive_cmd $archive_flags $archive_late_flags "${positional[@]}" 2>$verbosity \
|| error_msg "could not archive '${archive_fn}'" \
) \
| ( \
$encrypt_cmd $encrypt_flags "$archive_fn" $passphrase_flags 2>$verbosity \
|| error_msg "could not encrypt '${archive_fn}'" \
)
else
$archive_cmd $archive_flags "$archive_fn" $archive_late_flags "${positional[@]}" 2>$verbosity \
|| error_msg "could not archive '${archive_fn}'"
fi
}