dotfiles/.bashrc

#!/bin/bash

# `bash`-specific configurations


# Prevent running this file twice, as a non-login `bash` enters here,
# sources ~/.profile, and ~/.profile sources this file again
[ -n "$BASHRC_LOADED" ] && return
BASHRC_LOADED=1


# Load configuration files common to all kinds of shells,
# if not already done by a `bash` login shell
[ -z "$PROFILE_LOADED" ] && [ -f "$HOME/.profile" ] && . "$HOME/.profile"


# Ensure `bash` is running interactively
case $- in
    *i*) ;;
      *) return;;
esac


# Configure the `history`

# Set these environment variables here
# to avoid conflict/overlap with `zsh`

export HISTFILE="$XDG_STATE_HOME/bash/history"

export HISTSIZE=999999      # Number of lines kept in memory
export HISTFILESIZE=999999  # Number of lines kept in the `$HISTFILE`

# Ignore commands prefixed with a space
# and ones entered identically just before
export HISTCONTROL=ignoreboth

shopt -s cmdhist       # Remember multi-line commands as just one line
shopt -s histappend    # Do not overwrite the `$HISTFILE`
shopt -s histreedit    # Allow editing failed history substitutions
shopt -s lithist       # Store multi-line commands in history without `;`


# Make `bash` feel a bit more like `zsh`

shopt -s autocd        # Just type the directory to `cd` into it
shopt -s cdspell       # Correct minor spelling mistakes with `cd`

shopt -s checkjobs     # Show number of running jobs when exiting `bash`

shopt -s checkwinsize  # Update `$LINES` and `$COLUMNS` after commands

shopt -s globstar      # Expand ** into recursive directories
shopt -s extglob       # Advanced glob patterns (like `EXTENDED_GLOB` in `zsh`)
shopt -s failglob      # Abort when a glob matches nothing (like `NO_MATCH` in `zsh`)


stty -ixon             # Prevent <Control>s from freezing `bash`


# Make `bash` show `chroot`s in the prompt
if [ -z "${debian_chroot:-}" ] && [ -r /etc/debian_chroot ]; then
    debian_chroot=$(cat /etc/debian_chroot)
fi


# Align `bash` and `zsh` for prompts (see `$PS1` in ~/.zshrc)
PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '


# Enable tab completion
if ! shopt -oq posix; then
    if [ -f /usr/share/bash-completion/bash_completion ]; then
        . /usr/share/bash-completion/bash_completion
    elif [ -f /etc/bash_completion ]; then
        . /etc/bash_completion
    fi
fi


# Jump to frequently used directories with `z <fragment>`
if _command_exists zoxide; then
    eval "$(zoxide init bash)"
fi


# Suggest the `apt` package providing an unknown command
if [ -r /etc/bash_command_not_found ]; then
    . /etc/bash_command_not_found
fi


# Fuzzy finding for
#  - `history`: <Control>r
#  - files: <Control>t
#  - `cd`: <Alt>c
if [ -r /usr/share/doc/fzf/examples/key-bindings.bash ]; then
    . /usr/share/doc/fzf/examples/key-bindings.bash
fi

# Fuzzy completion with the `**` trigger (e.g., `vi **<Tab>`, `ssh **<Tab>`)
# is set up in ~/.bash_completion, so that it is loaded before `complete_alias`