40-path

#
#  Add directory to PATH if it exists
#
function add_to_path
{
   if [ -d "$1" ]; then
      export PATH=$1:$PATH
   fi
}


#
# Empty the PATH so we have a known-starting point.
#
export PATH=

#
# Add on the expected/standard directories.
#
add_to_path /bin
add_to_path /usr/bin
add_to_path /sbin
add_to_path /usr/sbin
add_to_path /usr/local/bin
add_to_path /usr/local/sbin

#
# Some optional directories might exist, and if so they will be added.
#
add_to_path /opt/node/bin
add_to_path /opt/packer
add_to_path /opt/pass
add_to_path /opt/sysadmin-util
add_to_path /opt/vpn
add_to_path /usr/games
add_to_path /usr/lib/ccache
add_to_path /var/lib/gems/1.8/bin
add_to_path /var/lib/gems/1.9/bin

#
# We allow a per-user, and a per-user + per-host setup.
#
add_to_path ~/bin/
add_to_path ~/bin-$(hostname --short)


#
# Now we have some extra setup for things that might be present.
#


#
# Golang
#
if [ -d /opt/go ]; then

    # Add the path
    add_to_path /opt/go/bin
    add_to_path $HOME/go/bin

    # go-specific environmental variable setup.
    export GO111MODULE=on
    export GOPATH=$HOME/go
    export GOROOT=/opt/go

fi


#
# Ruby Gems
#
if [ -d ~/gems/bin ]; then
    export GEM_HOME=~/gems/
    add_to_path $HOME/gems/bin
fi





#
#  Remove any duplicated entries.
#
export PATH=$(echo "$PATH" | awk -F: '{for (i=1;i<=NF;i++) { if ( !x[$i]++ ) printf("%s:",$i); }}')