title: My `.bashrc`
tags: linux bash rc

My `.bashrc` is quite an elaborate setup. I factor most things into files with a `.stuff` extension.
I then put everything in a hierarchy somewhere, such as `/usr/jda` on my own machines, or `$HOME/jda`
in other places (often I want all users to share the same config on personal machines, since all users
are effectively me). The price is that shell startup takes half a second or so, and slightly longer
with WSL.

I split the `.bashrc` into two parts: one sets the paths, even if non-interactive. The other then
does everything else once the interactive check has passed.

```
JDA=/usr/jda
. "$JDA"/etc/bash_paths.bashrc

# If not running interactively, don't do anything
case $- in
    *i*) ;;
      *) return;;
esac

. "$JDA"/etc/bash_common.bashrc
```

## `bash_paths.bashrc`
The `tidypath` script removes non-existent directories and duplicate directories from the `PATH`.
```
# ~/.bashrc: executed by bash(1) for non-login shells.
# see /usr/share/doc/bash/examples/startup-files (in the package bash-doc)
# for examples

if [ -z "$JDA" ]; then
  export JDA=/usr/jda
fi
. "$JDA"/stuff/pathif.stuff
for s in "$JDA"/stuff /usr/npm/bin "$JDA/private/bin" "$JDA/local/bin" "$JDA"/bin "$HOME/.local/bin" "$HOME"/bin; do
  if [[ "$s" =~ etc/$ ]]; then continue; fi
  pathif -p "$s"
done
for s in "$HOME/perl5/bin" "/usr/local/go/bin"; do
  pathif -a "$s"
done
export PYTHONPATH="$HOME/.python:$PYTHONPATH"
if [ -x "$JDA/bin/tidypath" ]; then
  PYTHONPATH="$("$JDA/"bin/tidypath -c "$PYTHONPATH")"
fi
export VISUAL=vi EDITOR=vi
```

## `bash_common.bashrc`
```
# make less more friendly for non-text input files, see lesspipe(1)
[ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)"

.if() { for s; do if [ -f "$s" ]; then . "$s"; fi; done; }
.stuff() { 
  if [ $# = 0 ]; then
    ( cd "$JDA"/stuff; ls *.stuff | cut -f1 -d.; )
  else
    for s; do 
      [ -e "$JDA"/stuff/"$s".stuff ] && . "$JDA"/stuff/"$s".stuff; 
    done; 
  fi
}
.catstuff() {
  for s; do 
    [ -e "$JDA"/stuff/"$s".stuff ] && cat "$JDA"/stuff/"$s".stuff; 
  done; 
}
alias .s=.stuff
.s cmds
.s dircolors
.s completion
.s cd
.s cdh
.s zoxide
.s mpd
.s hist
.s mvdesc
.s cygwin
.s git
.s ssh
.s antlr
.s python
.s x11
.s shopt
.s perl
.s stuff
.s aliases
.s dot_commands
.s clip
.s cargo
.s nvm
.s go
.s tmux
.s vim
. my_prompt
complete -c viw catw batw lessw

# user-specific stuff in ~/bin/my_stuff.d/*.stuff
.s my_stuff

# ensure we got output from tidypath
# if tidypath is not found, this will not set the PATH to the empty string
NEWPATH="$("$JDA"/bin/tidypath "$PATH")"
[ -n "$NEWPATH" ] && PATH="$NEWPATH" 

.if "$HOME/.bash_aliases"

```