avoid duplicating expensive call to "stack path"

1 files changed, 2 insertions, 1 deletions

diff --git a/dot/bashrc b/dot/bashrc
index 9b257b6..c289c5f 100644
--- a/dot/bashrc
+++ b/dot/bashrc
@@ -40,6 +40,7 @@ memoize_retval()
 
   add_stack_binpath()
   {
+    [ "$STACK_PATH_HAS_BEEN_SET" ] && return
     local result="$( stack path 2>&1 | while read k v
       do
         case "$k" in
@@ -51,7 +52,7 @@ memoize_retval()
         esac
       done
     )"
-    [ "$result" ] && eval "$result"
+    [ "$result" ] && eval "$result" && export STACK_PATH_HAS_BEEN_SET=y
   }
 
 ### bash settings, general environment ###