Only use VCS_Info when it's available.

It was added in Zsh 4.3.9.

diff --git a/zsh/rc b/zsh/rc
index 73f3f1df4fe3c14602eace34922790f2b4080cd9..d627a083ae66ae51e72aa3361a91a448d7def2fb 100644 (file)
--- a/zsh/rc
+++ b/zsh/rc
@@ -66,30 +66,34 @@ PROMPT="%{${fg[green]}%}%B%m%b%{${fg[default]}%}:\
 %(1j.%{${fg[yellow]}%}%j%{${fg[default]}%}.)%(2L.+.)%# \
 %(?..(%{${fg[red]}%}%B%?%b%{${fg[default]}%}%) )"
 
-# Allow substitutions and expansions in the prompt, necessary for vcs_info.
-setopt promptsubst
-# Load vcs_info to display information about version control repositories.
-autoload -Uz vcs_info
-# Only look for git and mercurial repositories; the only I use.
-zstyle ':vcs_info:*' enable git hg
-# Set style of vcs_info display. The current branch (green) and vcs (blue) is
-# displayed. If there is an special action going on (merge, rebase) it's also
-# displayed (red).
-zstyle ':vcs_info:*' formats \
-"(%{${fg[green]}%}%b%{${fg[default]}%}:\
-%{${fg[blue]}%}%s%{${fg[default]}%})"
-zstyle ':vcs_info:*' actionformats \
-"(%{${fg[green]}%}%b%{${fg[default]}%}/\
-%{${fg[red]}%}%a%{${fg[default]}%}:\
-%{${fg[blue]}%}%s%{${fg[default]}%})"
-# Call vcs_info as precmd before every prompt.
-prompt_precmd() {
-    vcs_info
-}
-add-zsh-hook precmd prompt_precmd
+# VCS_Info was added in 4.3.9.
+if [[ $ZSH_VERSION == (4.3.<9->|4.<4->*|<5->*) ]]; then
+    # Allow substitutions and expansions in the prompt, necessary for
+    # vcs_info.
+    setopt promptsubst
+    # Load vcs_info to display information about version control repositories.
+    autoload -Uz vcs_info
+    # Only look for git and mercurial repositories; the only I use.
+    zstyle ':vcs_info:*' enable git hg
+    # Set style of vcs_info display. The current branch (green) and vcs (blue)
+    # is displayed. If there is an special action going on (merge, rebase)
+    # it's also displayed (red).
+    zstyle ':vcs_info:*' formats \
+    "(%{${fg[green]}%}%b%{${fg[default]}%}:\
+    %{${fg[blue]}%}%s%{${fg[default]}%})"
+    zstyle ':vcs_info:*' actionformats \
+    "(%{${fg[green]}%}%b%{${fg[default]}%}/\
+    %{${fg[red]}%}%a%{${fg[default]}%}:\
+    %{${fg[blue]}%}%s%{${fg[default]}%})"
+    # Call vcs_info as precmd before every prompt.
+    prompt_precmd() {
+        vcs_info
+    }
+    add-zsh-hook precmd prompt_precmd
 
-# Display the vcs information in the right prompt.
-RPROMPT='${vcs_info_msg_0_}'
+    # Display the vcs information in the right prompt.
+    RPROMPT='${vcs_info_msg_0_}'
+fi
 
 # When screen is used set the name of the window to the currently running
 # program.