path: root/zsh/zshrc

# Use emacs keybindings for shell.
bindkey -e

# Use vi as my text editor.
export EDITOR=vi

# Keep plenty of history.
HISTFILE=~/.zsh_history
HISTSIZE=1000000
SAVEHIST=1000000

# Don't worry too much about sending me long lists.
LISTMAX=500

# Append history lines directly.
setopt appendhistory

# Push a directory onto the stack whenever changed.
setopt autopushd 

# Allow completing options for aliases.
setopt completealiases

# Use special globbing features.
setopt extendedglob

# Save a lot more information to the history file.
setopt extendedhistory

# Ignore duplicate history.
setopt histignorealldups

# Ignore duplicate directories on the stack.
setopt pushdignoredups

# Always retrieve history from file, not memory.
setopt sharehistory

# Put completions above my prompt, not below it.
unsetopt alwayslastprompt

# Don't beep at me.
unsetopt beep

# Don't use flow control.
unsetopt flowcontrol

# Don't put filetype suffices in lists.
unsetopt listtypes

# Use zsh's built-in autocompletion.
autoload -Uz zutil
autoload -Uz compinit
autoload -Uz complist
compinit

# Make completion expand and correct helpfully.
zstyle ':completion:*' completer _expand _complete _correct _approximate

# SSH agent setup, if available.
[[ -e ~/.ssh/agent ]] && . ~/.ssh/agent

# Sensible prompts, we'll work out colours shortly.
PS1="[%n@%m:%~]%(!.#.$)"
PS2="..."

# Start stacking up options for ls and grep.
LS_OPTS=
GREP_OPTS=

# If we're using an xterm, force 256 colors.
if [[ $TERM == xterm* ]]; then
   TERM=xterm-256color
fi

# If we have a color terminal, do colory things.
if [[ $TERM == *color ]]; then

    # Change prompt color depending on whether I'm root or not.
    PS1="%{%(!.%F{red}.%F{green})%B%}${PS1}%{%b%f%}"

    # Get colouring for ls and grep if available.
    hash dircolors &>/dev/null && eval "$(dircolors -b)"
    if ls --help | grep -- --color &>/dev/null; then
        LS_OPTS="${LS_OPTS} --color=auto"
    fi
    if grep --help | grep -- --color &>/dev/null; then
       GREP_OPTS="${GREP_OPTS} --color=auto"
    fi

    # Use same colors for completion.
    zstyle ':completion:*:default' list-colors ${(s.:.)LS_COLORS}
    zstyle ':completion:*' list-colors ''
fi

# Set up more options for grep; exclude version control files.
if grep --help | grep -- --exclude &>/dev/null; then
    for PATTERN in .git .gitignore .gitmodules; do
        GREP_OPTS="${GREP_OPTS} --exclude=${PATTERN}"
    done
fi
if grep --help | grep -- --exclude-dir &>/dev/null; then
    for PATTERN in .cvs .git .hg .svn; do
        GREP_OPTS="${GREP_OPTS} --exclude-dir=${PATTERN}"
    done
fi

# Alias ls and grep with the options we've collected.
alias ls="ls ${LS_OPTS}"
alias grep="grep ${GREP_OPTS}"

# Protect innocent MySQL databases from my stupidity.
alias mysql='mysql --safe-updates'

# I always do this, and I hate slow train.
alias sl='ls'

# Set window titles in various terminals. Doesn't work yet.
case $TERM in
    screen*)
        precmd () {print -Pn "\ek%m\e\\"}
        ;;
    xterm*)
        precmd () {print -Pn "\e]0;%m\a"}
        ;;
esac

# Add space suffix to the prompt now that we're done hacking it up.
PS1="${PS1} "