bash startup-file one-liner for automatic userspace sshfs mount

.sshfs_startup

ping -w1 -c1 "$remote" > /dev/null && ( mount | grep "$remote" > /dev/null || sshfs "$user@$remote:$remote_path" "$local_mnt_path" -o reconnect,ServerAliveInterval=15 )

# Ping once and wait a max of 1s. Only advance if the remote responds.
# These could be larger/longer, but it would increase time to first prompt.
# Suppress output.
#
#   ping -w1 -c1 "$remote" > /dev/null && ( ... )
#
# We found the remote; now we check to see if that remote is already mounted
# by grepping the output of mount. We only proceed if grep *fails*, as this
# indicates that the mount doesn't exist yet. Suppress output.
#
#   mount | grep "$remote" > /dev/null || ...
#
# Mount doesn't exist, proceed to establish it, with auto-reconnect and active
# server connection polling.
# 
#   sshfs "$user@$remote:$remote_path" "$local_mnt_path" -o reconnect,ServerAliveInterval=15,ServerAliveCountMax=3
#
# Output suppressing could be more aggressive with "> /dev/null 2>&1"
#