zsh settings

.zshrc

# Find and set branch name var if in git repository.
function git_branch_name()
{
  branch=$(git symbolic-ref HEAD 2> /dev/null | awk 'BEGIN{FS="/"} {print $NF}')
  if [[ $branch == "" ]];
  then
    :
  else
    echo '%F{242}['$branch']%f'
  fi
}

# Enable prompt substitution
setopt PROMPT_SUBST

# Load zsh color names
autoload -U colors && colors

# Compact prompt: show last 2 dirs + branch
PROMPT='%F{cyan}%2~%f$(git_branch_name) %% '

# Path
export PATH="/opt/homebrew/bin/:$PATH"

# History file and size
export HISTFILE="$HOME/.zsh_history"
export HISTSIZE=10240
export SAVEHIST=10240

# Zsh history settings
setopt HIST_IGNORE_ALL_DUPS     # no duplicates at all
setopt HIST_REDUCE_BLANKS       # remove extra spaces
setopt HIST_VERIFY              # edit before executing history command
setopt EXTENDED_HISTORY         # add timestamps

# Critical settings for desired behavior
setopt INC_APPEND_HISTORY       # append after each command
setopt NO_SHARE_HISTORY         # disables cross-terminal history merging
setopt HIST_EXPIRE_DUPS_FIRST   # expire duplicate entries first

# HISTIGNORE can be buggy;
HISTIGNORE="&:[ ]*:exit:ls:bg:fg:history"

# Load history when starting a new shell session
if [[ -f $HISTFILE ]]; then
    fc -R
fi

# Keybindings
bindkey -e
WORDCHARS=${WORDCHARS//\/}

# Autocomplete
zstyle :compinstall filename '~/.zshrc'
autoload -Uz compinit
zstyle ':completion:*' use-cache on
zstyle ':completion:*' cache-path ~/.zsh/cache
compinit

# Aliases & editor
alias vi='vim'
export EDITOR=vi

# Permissions
umask 002

# Terminal type
export TERM=xterm