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re-factor hooks

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* gracefully pass missing dependencies (grep and sed)
This commit is contained in:
Martin Zuther 2019-12-27 23:25:45 +01:00
parent 91266ca8eb
commit e96345eb87
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GPG key ID: 47D3346D758A37D8
2 changed files with 123 additions and 67 deletions
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73
contrib/hooks/post_encrypt
View file

@ -20,38 +20,63 @@
YADM_DIRECTORY=$(dirname $YADM_HOOK_REPO)
YADM_CHECKSUMS=$YADM_DIRECTORY/files.checksums
CHECKSUM_ALGORITHM="512256"
CHECKSUM_ALGORITHM_NAME="SHA-512/256"
WARNING_MESSAGE="No checksums were created."
# check if "shasum" exists
if command -v shasum > /dev/null; then
# check if "shasum" supports SHA-512/256 algorithm
echo -n | shasum --algorithm 512256 2>&1 1> /dev/null
function print_warning_and_exit {
MESSAGE=$1
# set output color to yellow
echo -e "\033[1;33m"
echo "WARNING: $MESSAGE $WARNING_MESSAGE"
# reset output color
echo -e "\033[0m"
exit $YADM_HOOK_EXIT
}
function ensure_command {
COMMAND_NAME=$1
# check if command exists
if ! command -v "$COMMAND_NAME" > /dev/null; then
print_warning_and_exit "command \"$COMMAND_NAME\" not found."
fi
}
function ensure_algorithm {
# check if "shasum" supports algorithm
echo -n | shasum --algorithm "$CHECKSUM_ALGORITHM" &> /dev/null
if [ $? -ne 0 ]; then
echo
echo "WARNING: \"shasum\" does not support SHA-512/256. No checksums were created."
exit $YADM_HOOK_EXIT
print_warning_and_exit "\"shasum\" does not support $CHECKSUM_ALGORITHM_NAME."
fi
}
# empty checksum file
echo -n > $YADM_CHECKSUMS
# calculate checksums for encrypted files
for included in ${YADM_ENCRYPT_INCLUDE_FILES[@]}; do
shasum --algorithm 512256 $included >> $YADM_CHECKSUMS
ERROR_CODE=$?
# check if "shasum" exists and supports algorithm
ensure_command shasum
ensure_algorithm
# signal errors
if [ $ERROR_CODE -ne 0 ]; then
exit $ERROR_CODE
fi
done
# empty checksum file
echo -n > $YADM_CHECKSUMS
echo "Wrote checksums: $YADM_CHECKSUMS (SHA-512/256)"
else
echo
echo "WARNING: command \"shasum\" not found. No checksums were created."
exit $YADM_HOOK_EXIT
fi
# calculate checksums for encrypted files
for included in ${YADM_ENCRYPT_INCLUDE_FILES[@]}; do
shasum --algorithm $CHECKSUM_ALGORITHM $included >> $YADM_CHECKSUMS
# signal errors
if [ $? -ne 0 ]; then
exit $?
fi
done
echo "Wrote checksums: $YADM_CHECKSUMS ($CHECKSUM_ALGORITHM_NAME)"
# return exit status of the yadm command
exit $YADM_HOOK_EXIT

117
contrib/hooks/post_status
View file

@ -20,50 +20,81 @@
YADM_DIRECTORY=$(dirname $YADM_HOOK_REPO)
YADM_CHECKSUMS=$YADM_DIRECTORY/files.checksums
CHECKSUM_ALGORITHM="512256"
CHECKSUM_ALGORITHM_NAME="SHA-512/256"
WARNING_MESSAGE="Checksums were not verified."
function print_warning_and_exit {
MESSAGE=$1
# set output color to yellow
echo -e "\033[1;33m"
echo "WARNING: $MESSAGE $WARNING_MESSAGE"
# reset output color
echo -e "\033[0m"
exit $YADM_HOOK_EXIT
}
function ensure_command {
COMMAND_NAME=$1
# check if command exists
if ! command -v "$COMMAND_NAME" > /dev/null; then
print_warning_and_exit "command \"$COMMAND_NAME\" not found."
fi
}
function ensure_algorithm {
# check if "shasum" supports algorithm
echo -n | shasum --algorithm "$CHECKSUM_ALGORITHM" &> /dev/null
if [ $? -ne 0 ]; then
print_warning_and_exit "\"shasum\" does not support $CHECKSUM_ALGORITHM_NAME."
fi
}
# check whether file with checksums exists
if [ -f $YADM_CHECKSUMS ]; then
# check if "shasum" exists
if command -v shasum > /dev/null; then
# check if "shasum" supports SHA-512/256 algorithm
echo -n | shasum --algorithm 512256 2>&1 1> /dev/null
if [ $? -ne 0 ]; then
echo
echo "WARNING: \"shasum\" does not support SHA-512/256. Checksums were not verified."
exit $YADM_HOOK_EXIT
fi
# check encrypted files for differences and capture output
YADM_CHECKSUM_OUTPUT=$(shasum --algorithm 512256 --check $YADM_CHECKSUMS 2> /dev/null)
ERROR_CODE=$?
# some checksums do not match
if [ $ERROR_CODE -ne 0 ]; then
echo
echo "Some SHA-512/256 sums do not match:"
# set output color to red
echo -e "\033[0;31m"
# display mismatching files
while IFS= read -r line; do
echo $line | grep -iv "\sok$" | sed 's/^/ / ; s/: FAILED$//'
done <<< "$YADM_CHECKSUM_OUTPUT"
# reset output color
echo -e "\033[0m"
echo "Consider running either \"yadm encrypt\" or \"yadm decrypt\"."
# signal error
exit $ERROR_CODE
fi
else
echo
echo "WARNING: command \"shasum\" not found. Checksums were not verified."
exit $YADM_HOOK_EXIT
fi
if [ ! -f $YADM_CHECKSUMS ]; then
# return exit status of the yadm command
exit $YADM_HOOK_EXIT
fi
# return exit status of the yadm command
exit $YADM_HOOK_EXIT
# check if "shasum" exists and supports algorithm
ensure_command shasum
ensure_algorithm
# check encrypted files for differences and capture output
YADM_CHECKSUM_OUTPUT=$(shasum --algorithm "$CHECKSUM_ALGORITHM" --check $YADM_CHECKSUMS 2> /dev/null)
ERROR_CODE=$?
# some checksums do not match
if [ $ERROR_CODE -ne 0 ]; then
echo
echo "Some $CHECKSUM_ALGORITHM_NAME sums do not match:"
# set output color to red
echo -e "\033[0;31m"
# display mismatching files
while IFS= read -r line; do
# try to beautify output
if command -v grep > /dev/null && command -v sed > /dev/null; then
echo $line | grep -iv "\sok$" | sed 's/^/ / ; s/: FAILED$//'
else
echo $line
fi
done <<< "$YADM_CHECKSUM_OUTPUT"
# reset output color
echo -e "\033[0m"
echo "Consider running either \"yadm encrypt\" or \"yadm decrypt\"."
# signal error
exit $ERROR_CODE
fi