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#!/bin/dash
if mountpoint -q -- "${HOME}/.var/opt/signal/SignalCrypt.d"; then
printf '%s\n' 'mount-signal: already mounted' >&2
elif test -e /dev/mapper/SignalCrypt; then
asroot env SIGNAL_DIR="${HOME}/.var/opt/signal" sh -ec \
'mount -- /dev/mapper/SignalCrypt "${SIGNAL_DIR}/SignalCrypt.d"'
else
gpg --decrypt -- "${HOME}/.var/opt/signal/SignalCrypt.key" | \
key2root -k SignalCrypt env \
SIGNAL_IMG="${HOME}/.var/opt/signal/SignalCrypt.img" \
SIGNAL_DIR="${HOME}/.var/opt/signal" \
SIGNAL_DEV="$(losetup | sed 's/\s\+/ /g' | cut -d ' ' -f 1,6 | \
sed -n 's#\(/[^ ]*\) '"$(realpath -- "${HOME}/.var/opt/signal/SignalCrypt.img")"'$#\1#p' | sed 1q)" \
sh -ec '
if test -z "${SIGNAL_DEV}"; then
SIGNAL_DEV="$(losetup --show -f -P "${SIGNAL_IMG}")"
fi
cryptsetup -d - -- open "${SIGNAL_DEV}" SignalCrypt
mount -- /dev/mapper/SignalCrypt "${SIGNAL_DIR}/SignalCrypt.d"
'
fi
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