Minimal .zshrc to output git branch name in prompt using vcs_info.

minimal_zshrc_1.sh

# ~/.zshrc 

# Enabling and setting git info var to be used in prompt config.
autoload -Uz vcs_info
zstyle ':vcs_info:*' enable git svn
# This line obtains information from the vcs.
zstyle ':vcs_info:git*' formats "- (%b) "
precmd() {
    vcs_info
}

# Enable substitution in the prompt.
setopt prompt_subst

# Config for the prompt. PS1 synonym.
prompt='%2/ ${vcs_info_msg_0_}> '