From 9ea48355673a75f1d63320be20a231837a816781 Mon Sep 17 00:00:00 2001
From: Alexander Barton <alex@barton.de>
Date: Mon, 8 Jun 2015 14:59:24 +0200
Subject: [PATCH] Change plugins to not do anything if tool isn't available

Don't even echo error messages, simply skip the plugin to do anything
when the respective tool(s) isn't available on the system.
---
 plugins/5_dev_env/5_dev_env.plugin.zsh     | 14 +++++++++-----
 plugins/boot2docker/boot2docker.plugin.zsh | 12 +++++++-----
 plugins/keychain/keychain.plugin.zsh       |  4 +++-
 plugins/thefuck/thefuck.plugin.zsh         |  4 +++-
 4 files changed, 22 insertions(+), 12 deletions(-)

diff --git a/plugins/5_dev_env/5_dev_env.plugin.zsh b/plugins/5_dev_env/5_dev_env.plugin.zsh
index 2977ff8..9e4cd26 100644
--- a/plugins/5_dev_env/5_dev_env.plugin.zsh
+++ b/plugins/5_dev_env/5_dev_env.plugin.zsh
@@ -15,10 +15,14 @@ done
 unset ssh_wrapper
 
 # pip
-export PIP_REQUIRE_VIRTUALENV="true"
+if (( $+commands[pip] )); then
+	export PIP_REQUIRE_VIRTUALENV="true"
+fi
 
 # virtualenv[wrapper]
-export WORKON_HOME="$XDG_CACHE_HOME/virtualenvs"
-[ -d "$LOCAL_HOME/Develop" ] \
-        && export PROJECT_HOME="$LOCAL_HOME/Develop" \
-        || export PROJECT_HOME="$HOME/Develop"
+if (( $+commands[virtualenv] )); then
+	export WORKON_HOME="$XDG_CACHE_HOME/virtualenvs"
+	[ -d "$LOCAL_HOME/Develop" ] \
+	        && export PROJECT_HOME="$LOCAL_HOME/Develop" \
+	        || export PROJECT_HOME="$HOME/Develop"
+fi
diff --git a/plugins/boot2docker/boot2docker.plugin.zsh b/plugins/boot2docker/boot2docker.plugin.zsh
index 9813acd..8a63173 100644
--- a/plugins/boot2docker/boot2docker.plugin.zsh
+++ b/plugins/boot2docker/boot2docker.plugin.zsh
@@ -1,8 +1,10 @@
 # boot2docker.plugin.zsh
 
-boot2docker status | fgrep "running" >/dev/null
-if [ $? -eq 0 ]; then
-	# boot2docker VM is running
-	eval `boot2docker shellinit 2>/dev/null`
-	DOCKER_HOST_IPA=${(z)${(s.:.)DOCKER_HOST#tcp://}[1]}
+if (( $+commands[boot2docker] )); then
+	boot2docker status | fgrep "running" >/dev/null
+	if [ $? -eq 0 ]; then
+		# boot2docker VM is running
+		eval `boot2docker shellinit 2>/dev/null`
+		DOCKER_HOST_IPA=${(z)${(s.:.)DOCKER_HOST#tcp://}[1]}
+	fi
 fi
diff --git a/plugins/keychain/keychain.plugin.zsh b/plugins/keychain/keychain.plugin.zsh
index c1c6fbb..e01f9ae 100644
--- a/plugins/keychain/keychain.plugin.zsh
+++ b/plugins/keychain/keychain.plugin.zsh
@@ -1,3 +1,5 @@
 # keychain.plugin.zsh
 
-eval $(keychain --agents ssh --eval --quick --quiet)
+if (( $+commands[keychain] )); then
+	eval $(keychain --agents ssh --eval --quick --quiet)
+fi
diff --git a/plugins/thefuck/thefuck.plugin.zsh b/plugins/thefuck/thefuck.plugin.zsh
index 4042544..754d342 100644
--- a/plugins/thefuck/thefuck.plugin.zsh
+++ b/plugins/thefuck/thefuck.plugin.zsh
@@ -1,3 +1,5 @@
 # thefuck.plugin.zsh
 
-alias fuck='eval $(thefuck $(fc -ln -1 | tail -n 1)); fc -R'
+if (( $+commands[thefuck] )); then
+	alias fuck='eval $(thefuck $(fc -ln -1 | tail -n 1)); fc -R'
+fi
-- 
2.39.2