zsh: Show current Git branch in ${RPROMPT}

This does not apply if ${TERM_PROGRAM} is ‘iTerm.app’ as iTerm2 already
has a status bar that shows that information.

See https://iterm2.com/documentation-status-bar.html for more details.

1 files changed, 12 insertions, 0 deletions

diff --git a/zsh/rc b/zsh/rc
index 3170617..1b56d48 100644
--- a/zsh/rc
+++ b/zsh/rc
@@ -60,6 +60,18 @@ setopt HIST_REDUCE_BLANKS
 setopt INC_APPEND_HISTORY
 setopt SHARE_HISTORY
 
+if [[ ${TERM_PROGRAM} != iTerm.app ]]; then
+  autoload -Uz vcs_info
+
+  zstyle ':vcs_info:*' enable git
+  zstyle ':vcs_info:*' formats '[%b]'
+
+  RPROMPT='${vcs_info_msg_0_}'
+  precmd_functions+=(vcs_info)
+
+  setopt PROMPT_SUBST
+fi
+
 source_if_exists dotfiles-${UNAME}/zsh/rc
 source_if_exists dotfiles-${DOMAIN}/zsh/rc
 source_if_exists dotfiles-${HOST}/zsh/rc