From b647fdba3884ae0466cbe4b14d72b49779ffb30b Mon Sep 17 00:00:00 2001
From: David Runge <dave@sleepmap.de>
Date: Thu, 8 Feb 2018 13:06:58 +0100
Subject: .zshrc: Fix usage of zsh extensions on other systems or when those
 extensions are not around.

---
 .zshrc | 43 ++++++++++++++++++++++++++++++-------------
 1 file changed, 30 insertions(+), 13 deletions(-)

diff --git a/.zshrc b/.zshrc
index 4d500ec..b03cacb 100644
--- a/.zshrc
+++ b/.zshrc
@@ -391,20 +391,37 @@ zstyle ':completion:*:(ssh|scp|rsync):*:hosts-ipaddr' ignored-patterns '^(<->.<-
 
 
 # syntax-highlighting
-source /usr/share/zsh/plugins/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh
-
-# history-substring-search
-source /usr/share/zsh/plugins/zsh-history-substring-search/zsh-history-substring-search.zsh
-# Vi
-bindkey -M vicmd "k" history-substring-search-up
-bindkey -M vicmd "j" history-substring-search-down
-
-# Emacs and Vi
-for keymap in 'viins'; do
-  bindkey -M "$keymap" "$key_info[Up]" history-substring-search-up
-  bindkey -M "$keymap" "$key_info[Down]" history-substring-search-down
-done
+if [ -f /usr/share/zsh/plugins/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh ]; then
+  source /usr/share/zsh/plugins/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh
+elif [ -f /usr/share/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh ]; then
+  source /usr/share/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh
+fi
 
+if [ -f /usr/share/zsh/plugins/zsh-history-substring-search/zsh-history-substring-search.zsh ]; then
+  # history-substring-search
+  source /usr/share/zsh/plugins/zsh-history-substring-search/zsh-history-substring-search.zsh
+  # Vi
+  bindkey -M vicmd "k" history-substring-search-up
+  bindkey -M vicmd "j" history-substring-search-down
+
+  # Emacs and Vi
+  for keymap in 'viins'; do
+    bindkey -M "$keymap" "$key_info[Up]" history-substring-search-up
+    bindkey -M "$keymap" "$key_info[Down]" history-substring-search-down
+  done
+elif [ -f /usr/share/zsh-history-substring-search/zsh-history-substring-search.zsh ]; then
+  # history-substring-search
+  source /usr/share/zsh-history-substring-search/zsh-history-substring-search.zsh
+  # Vi
+  bindkey -M vicmd "k" history-substring-search-up
+  bindkey -M vicmd "j" history-substring-search-down
+
+  # Emacs and Vi
+  for keymap in 'viins'; do
+    bindkey -M "$keymap" "$key_info[Up]" history-substring-search-up
+    bindkey -M "$keymap" "$key_info[Down]" history-substring-search-down
+  done
+fi
 
 # zsh.after
 #
-- 
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