setup_path

add_to_path() {
    path="$1"
    if [ -d "$path" ]; then
        case "$PATH" in
          *:$path:*|*:$path|$path:*)
            return
          ;;
        esac
        PATH="$path":"$PATH"
    fi
}

# Set up $PATH appropriately, using user's private bin if it exists,
# plus any contrib directories that exist in user's private bin,
# plus any bin/ directories that compiled software might exist in.
PRIVATE_BIN="$HOME/etc/bin"
if [ -d "$PRIVATE_BIN/contrib/" ] ; then
    for contrib_dir in "$PRIVATE_BIN"/contrib/*; do
        add_to_path "$contrib_dir"
        add_to_path "$contrib_dir"/bin
    done
fi

# ~/local is a mistake, should move to ~/.local
for bin in "$PRIVATE_BIN" "$HOME"/.gem/ruby/*/bin "$HOME"/.cabal/bin \
           "$HOME"/.local/bin "$HOME"/local/bin; do
    add_to_path "$bin"
done

for bin in /opt/*/bin /opt/*/*/bin; do
    add_to_path "$bin"
done

# Seems like I don't actually need this; pip install --user does the
# right thing?
#PYTHONPATH=~/.local/lib/python2.7/site-packages
#export PYTHONPATH