#+title: my shell prompt
#+rss_title: my shell prompt
#+pubdate: <2020-11-09>

A [[https://nixers.net/Thread-Your-PROMPT][thread]] was recently promoted on nixers to show your shell prompt, so I'll share some features of mine. I usually use bash with Emacs shell-mode, so I get vim bindings for free via evil, with the mode indicator being the cursor ('|' vs '█'). I usually use '♥'  as a prompt character, but for the sake of this post I'll use '$', as the heart can look wildly different depending on your font setup.

Errors and background processes:

#+begin_src text
$ false
! vim temp.txt
[1]+  Stopped                 vim temp.txt
$! true
$$ fg
vim temp
$
#+end_src

git stuff:

#+begin_src text
$ cd $(mktemp -d)
$ git init
Initialized empty Git repository in /tmp/tmp.enlQwywyEv/.git/
$ touch readme.md
? $ git checkout -b new_branch
Switched to a new branch 'new_branch'
(new_branch|?) $ git add readme.md
(new_branch|+) $ echo 'edit' >> readme.md
(new_branch|+*) $ git commit -m "initial"
[new_branch (root-commit) 3ff638e] initial
 1 file changed, 0 insertions(+), 0 deletions(-)
 create mode 100644 readme.md
(new_branch) $ git checkout -b master; git reset --hard
Switched to a new branch 'master'
HEAD is now at 3ff638e initial
$
#+end_src

non-standard environment detection (checks capital variables):

#+begin_src text
$ PYTHONPATH="$HOME/something/stateful"
E $ envv
PYTHONPATH=/home/neeasade/something/stateful
E $ unset PYTHONPATH
$
#+end_src

ssh hostname:

#+begin_src text
$ ssh super.cool.vps
trouw $ logout
$
#+end_src

and a hack that tells Emacs where the shell is (including tramp information -- this is normally used in the prompt, I'm just showing it out here):

#+begin_src text
$ ssh super.cool.vps
trouw $ tell_emacs_shell_location
+Pr0mPT+/ssh:neeasade@192.0.2.0:/home/neeasade+
trouw $ logout
$
#+end_src

Source is here: [[https://github.com/neeasade/dotfiles/blob/083d2996df4a2fff6b7ebfbc237a6a27babcf4b9/shell/.sh.d/style#L109][~/.sh.d/style]]