# History shared between sessions.
HISTFILE=~/.zsh_history HISTSIZE=10000 SAVEHIST=10000
setopt share_history hist_ignore_dups hist_ignore_space interactive_comments auto_cd

# Completion: menu, case-insensitive, colored. -C skips compaudit, which is slow on
# Windows and meaningless under MSYS2's noacl mounts (rm ~/.zcompdump after adding completions).
autoload -Uz compinit && compinit -C
zstyle ':completion:*' menu select
zstyle ':completion:*' matcher-list 'm:{a-z}={A-Z}'
zstyle ':completion:*' list-colors ${(s.:.)LS_COLORS}

# Emacs keys; Up/Down search history for what is already typed.
bindkey -e
autoload -Uz up-line-or-beginning-search down-line-or-beginning-search
zle -N up-line-or-beginning-search && zle -N down-line-or-beginning-search
bindkey '^[[A' up-line-or-beginning-search '^[OA' up-line-or-beginning-search
bindkey '^[[B' down-line-or-beginning-search '^[OB' down-line-or-beginning-search

# Prompt: user@host:directory, git branch, exit status of the last command if it failed.
# A literal '#' as on Linux: zsh's %# would show '%', since this root is not uid 0.
# The branch is read from .git/HEAD directly: starting git on every prompt is slow on Windows.
precmd() {
  local d=$PWD head=
  until [[ -e $d/.git || $d == / ]]; do d=${d:h}; done
  [[ -f $d/.git/HEAD ]] && read -r head < $d/.git/HEAD
  [[ $head == 'ref: '* ]] && git_branch=${head#ref: refs/heads/} || git_branch=${head:0:7}
  print -Pn '\e]0;%n@%m: %~\a'
}
setopt prompt_subst
PROMPT='%F{green}%n@%m%f:%F{blue}%~%f${git_branch:+ %5F($git_branch)%f}%(?.. %F{red}[%?]%f)# '

alias ls='ls --color=auto' ll='ls -lah' grep='grep --color=auto'

# Process monitor: htop does not exist for MSYS2 (its /proc only shows MSYS2 processes).
# bottom is a native Windows program; winpty lets it draw in the pty, as Server 2016 has no ConPTY.
alias btm='winpty /ucrt64/bin/btm'