.bashrc

#!/bin/bash
# shellcheck disable=SC1090

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

# Add ~/.local/bin/ to PATH
export PATH="$HOME/.local/bin${PATH:+:${PATH}}"
# Need to be sourced before everything else so that bash-completion works as expected.
[ -f ~/.fzf.bash ] && source ~/.fzf.bash
[ -f ~/.cargo/env ] && source ~/.cargo/env

has_existing_non_scratch_tmux_session() {
    if ! tmux info &>/dev/null; then
        # tmux server isn't running; there's no sessions of any kind
        return 1
    fi

    local non_scratch_sessions
    non_scratch_sessions="$(tmux list-sessions -f '#{?#{==:#S,scratch},,#S}' 2>/dev/null)"
    test -n "$non_scratch_sessions"
}

if [[ -z "$TMUX" ]]; then
    if ! has_existing_non_scratch_tmux_session; then
        # If there are no existing sessions, make a new one
        tmux new-session
    else
        # If there _is_ an existing session, make a new one, but use the first discovered session as
        # a shared session group. This is the "rogue mode" from https://github.com/zolrath/wemux
        # Windows are shared (and cursors within a window). But two sessions can be in different
        # windows at the same time.
        #
        # Note that for this to be a pleasant experience, both sessions should use the same size.
        # Otherwise, when a window gets focused, it will resize both windows.
        tmux new-session -t "$(tmux list-sessions -F '#S' | head -1)"
    fi
fi

##################################################################################################
# Find the location of the dotfiles repository by resolving the ~/.bashrc symlink.
##################################################################################################
SOURCE="${BASH_SOURCE[0]}"
# resolve $SOURCE until the file is no longer a symlink
while [ -h "$SOURCE" ]; do
    DIR="$(cd -P "$(dirname "$SOURCE")" >/dev/null 2>&1 && pwd)"
    SOURCE="$(readlink "$SOURCE")"
    # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
    [[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE"
done
DOTFILES_DIR="$(cd -P "$(dirname "$SOURCE")" >/dev/null 2>&1 && pwd)/.."
DOTFILES_DIR="$(readlink --canonicalize --no-newline "${DOTFILES_DIR}")"
export DOTFILES_DIR
unset -v DIR
unset -v SOURCE

##################################################################################################
# Source each of components in alphabetical order.
# This is where most of the customizations come from.
##################################################################################################
for rcfile in "${DOTFILES_DIR}/bashrc.d/"*.sh; do
    [ -f "$rcfile" ] && source "$rcfile"
done
unset -v rcfile