Move environment variables to ~/.env and add powerline

.bashrc

-export EDITOR=nano
+# important environment variables must be set here since this file is loaded
+# in /etc/profile, i.e. *before* ~/.profile!
+. ~/.env
 
 # setup modules
 module load datashare
@@ -37,13 +39,11 @@ shopt -s histappend
 #HISTFILESIZE=8000
 HISTTIMEFORMAT='%F %T '
 
-# set PS1
-case "$TERM" in
-	xterm-color|*-256color|screen) color_prompt=yes;;
-esac
-if [ "$color_prompt" = yes ]; then
-	PS1='\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
-fi
+# powerline (prompt)
+powerline-daemon -q
+POWERLINE_BASH_CONTINUATION=1
+POWERLINE_BASH_SELECT=1
+. ~/.local/lib/python3.7/site-packages/powerline/bindings/bash/powerline.sh
 
 # additional alias definitions
 if [ -f ~/.alias ]; then

.env

+# only execute once (for login)
+if [ "$_ENV_READ" ]; then
+	return
+fi
+
+# set umask (umask -S: u=rwx,g=,o=)
+umask 077
+
+# set PATH
+PATH="$PATH:$HOME/.local/bin"
+
+# default editor
+EDITOR=nano
+export EDITOR
+
+# default options for less
+# default used by git if LESS is unset: LESS='FRX'
+# TODO: make -F work without -X
+LESS="$LESS -I -M -R -x4"
+export LESS
+
+# set variable to mark this file as read
+_ENV_READ=1
+export _ENV_READ

.profile

+# Note that this file is loaded *after* ~/.bashrc, which is loaded in
+# /etc/profile.
+# Load /etc/profile here if it hasn’t been loaded yet.
 test -z "$PROFILEREAD" && . /etc/profile || true
-
-# set PATH
-PATH="$PATH:$HOME/.local/bin"