afab29c5fc
* Improve handling of submodules at upgrade (#284, #285, #293) * Improve Zsh completions (#292, #298) * Use stderr for error messages (#297)
96 lines
2.8 KiB
Bash
Executable file
96 lines
2.8 KiB
Bash
Executable file
#!/usr/bin/env bash
|
|
|
|
# yadm - Yet Another Dotfiles Manager
|
|
# Copyright (C) 2015-2021 Tim Byrne and Martin Zuther
|
|
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
|
|
YADM_CHECKSUMS="$YADM_HOOK_DIR/files.checksums"
|
|
WARNING_MESSAGE="No checksums were created"
|
|
|
|
# unpack exported array; filenames including a newline character (\n)
|
|
# are NOT supported
|
|
OLD_IFS="$IFS"
|
|
IFS=$'\n'
|
|
YADM_ENCRYPT_INCLUDE_FILES=( $YADM_ENCRYPT_INCLUDE_FILES )
|
|
IFS="$OLD_IFS"
|
|
|
|
|
|
function get_checksum_command {
|
|
# check if "shasum" exists and supports the algorithm (which is
|
|
# tested by sending an empty string to "shasum")
|
|
if command -v "shasum" > /dev/null && printf "" | shasum --algorithm "256" &> /dev/null; then
|
|
printf "shasum --algorithm 256"
|
|
# check if "sha256sum" exists
|
|
elif command -v "sha256sum" > /dev/null; then
|
|
printf "sha256sum"
|
|
# check if "gsha256sum" exists
|
|
elif command -v "gsha256sum" > /dev/null; then
|
|
printf "gsha256sum"
|
|
else
|
|
# display warning in bright yellow
|
|
printf "\033[1;33m" >&2
|
|
printf "\nWARNING: \"shasum\", \"sha256sum\" and \"gsha256sum\" not found. %s\n" "$WARNING_MESSAGE." >&2
|
|
|
|
# reset output color
|
|
printf "\033[0m" >&2
|
|
|
|
# signal error
|
|
return 1
|
|
fi
|
|
}
|
|
|
|
|
|
# get checksum command
|
|
CHECKSUM_COMMAND=$(get_checksum_command)
|
|
|
|
# no command found
|
|
if (($?)); then
|
|
# return original exit status of yadm command
|
|
exit "$YADM_HOOK_EXIT"
|
|
fi
|
|
|
|
# empty (or create) checksum file
|
|
true > "$YADM_CHECKSUMS"
|
|
|
|
# calculate checksums for encrypted files
|
|
for included in "${YADM_ENCRYPT_INCLUDE_FILES[@]}"; do
|
|
# highlight any errors in red
|
|
printf "\033[0;31m"
|
|
|
|
# calculate checksums
|
|
$CHECKSUM_COMMAND "$included" >> "$YADM_CHECKSUMS"
|
|
ERROR_CODE=$?
|
|
|
|
# reset output color
|
|
printf "\033[0m"
|
|
|
|
# handle errors
|
|
if (($ERROR_CODE)); then
|
|
# display warning in bright yellow
|
|
printf "\033[1;33m" >&2
|
|
printf "\nWARNING: an error occurred. Please inspect the checksum file.\n" >&2
|
|
|
|
# reset output color
|
|
printf "\033[0m" >&2
|
|
|
|
# exit and signal error
|
|
exit $ERROR_CODE
|
|
fi
|
|
done
|
|
|
|
# announce success and return original exit status of yadm command
|
|
printf "Wrote SHA-256 checksums: %s\n" "$YADM_CHECKSUMS"
|
|
exit "$YADM_HOOK_EXIT"
|