Added fast PS1 example

bashrc_sample

@@ -141,7 +141,7 @@ if [ -d "$HOME/bin" ] ; then
     PATH="$HOME/bin:$PATH"
 fi
 
-# ssh-agent configuration for WSL
+# ssh-agent configuration for WSL. Will only ask for passphrase once per session.
 if [ -z "$(pgrep ssh-agent)" ]; then
    rm -rf /tmp/ssh-*
    eval $(ssh-agent -s) > /dev/null
@@ -151,7 +151,7 @@ else
 fi
 
 # This is only required if you want to load the default, or single
-# ssh key on bash session start. In my case there are different 
+# ssh key on bash session start. In my case there are different
 # keys per application so no point in loading any here yet.
 #if [ "$(ssh-add -l)" == "The agent has no identities." ]; then
 #    ssh-add
@@ -160,13 +160,25 @@ fi
 # Informative git prompt for bash and fish
 # https://github.com/magicmonty/bash-git-prompt
 # GIT_PROMPT_ONLY_IN_REPO=1
-GIT_PROMPT_THEME=Custom # use custom .git-prompt-colors.sh
-source ~/.bash-git-prompt/gitprompt.sh
+# GIT_PROMPT_THEME=Custom # use custom .git-prompt-colors.sh
+# source ~/.bash-git-prompt/gitprompt.sh
 
-# Own rolled super fast prompt if not using .bash-git-prompt.sh above.
+# Own rolled super fast prompt if not using .bash-git-prompt.sh above
+# and in particular under WSL, or slower machines.
 # http://ezprompt.net/
-# export PS1="\[\e[32m\]\u\[\e[m\]@\[\e[36m\]\H\[\e[m\]\[\e[33m\]:\[\e[m\]\[\e[33m\]\w\[\e[m\] \n∴ "
-
+# https://unix.stackexchange.com/questions/245548/git-ps1-current-branch-in-bash-prompt-is-always-out-of-date-somehow
+update_PS1 () {
+  # my default symbol below needs a unicode font - DejaVu Sans Mono
+  # (for Powerline) seems to work best across all platforms.
+  # See ./dotfiles/fonts for both Windows and *nix installers
+  prompt=∴
+  GIT_PS1_SHOWDIRTYSTATE=true
+  PS1="\[\e[32m\]\u\[\e[m\]@\[\e[36m\]\H\[\e[m\]\[\e[33m\]:\[\e[m\]\[\e[33m\]\w\[\e[m\]$(__git_ps1) \n$prompt "
+}
+shopt -u promptvars
+PROMPT_COMMAND=update_PS1
+
+# load any local settings
 if [ -f ~/.localrc ]; then
   . ~/.localrc
 fi