From 343a02f44fdfd8574a7093f48c64edee2a39e08e Mon Sep 17 00:00:00 2001
From: Correl Roush <correl@gmail.com>
Date: Tue, 26 Jan 2021 23:43:15 -0500
Subject: [PATCH] [provisioning] Only install mu if unavailable

---
 recipes/email | 26 ++++++++++++++------------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/recipes/email b/recipes/email
index c737da4..34560ef 100644
--- a/recipes/email
+++ b/recipes/email
@@ -111,18 +111,20 @@ case $_PLATFORM in
         done
         dir=`mktemp -d` && \
             pushd $dir >/dev/null
-        echo "[tgz] Fetching mu"
-        curl -sL https://github.com/djcb/mu/archive/master.tar.gz \
-            | tar xz --strip 1 && \
-            echo "[tgz] Configuring mu" && \
-            ./autogen.sh >/dev/null 2>&1 && \
-            ./configure --prefix=/usr >/dev/null 2>&1 && \
-            echo "[tgz] Building mu" && \
-            make >/dev/null 2>&1 && \
-            echo "[tgz] Installing mu" && \
-            sudo make install >/dev/null 2>&1
-        popd >/dev/null
-        rm -rf "$dir"
+        if ! command -v mu >/dev/null; then
+            echo "[tgz] Fetching mu"
+            curl -sL https://github.com/djcb/mu/archive/master.tar.gz \
+                | tar xz --strip 1 && \
+                echo "[tgz] Configuring mu" && \
+                ./autogen.sh >/dev/null 2>&1 && \
+                ./configure --prefix=/usr >/dev/null 2>&1 && \
+                echo "[tgz] Building mu" && \
+                make >/dev/null 2>&1 && \
+                echo "[tgz] Installing mu" && \
+                sudo make install >/dev/null 2>&1
+            popd >/dev/null
+            rm -rf "$dir"
+        fi
         ;;
 esac