Added support for conditional var assignments.

FOO?="BAR" will only assign "BAR" to $FOO if the $FOO variable is empty.
madumlao · Jun 24, 2012 · 9a4c1de · 9a4c1de
1 parent 7c046cf
commit 9a4c1de
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/bin/rbenv-vars b/bin/rbenv-vars
@@ -26,13 +26,14 @@ find-rbenv-vars-files() {
 
 sanitize-vars() {
   sed \
-    -e "/^[ "$'\t'"]*[A-Za-z_][0-9A-Za-z_]*=/ !d" \
+    -e "/^[ "$'\t'"]*[A-Za-z_][0-9A-Za-z_]*?\{0,1\}=/ !d" \
     -e "s/'/'\\\\''/g" \
     -e "s/\(\\\\\\\$\)/'\\1'/g" \
     -e "s/\\\\\\\\/\\\\/g" \
     -e "s/\(\\\$[0-9A-Za-z_][0-9A-Za-z_]*\)/'\\1'/g" \
     -e "s/\(\\\${[0-9A-Za-z_][0-9A-Za-z_]*}\)/'\\1'/g" \
-    -e "s/^[ "$'\t'"]*\([A-Za-z_][0-9A-Za-z_]*\)=\(.*\)$/export \\1='\\2'/"
+    -e "s/^[ "$'\t'"]*\([A-Za-z_][0-9A-Za-z_]*?\{0,1\}\)=\(.*\)$/export \\1='\\2'/" \
+    -e "s/export \([A-Za-z_][0-9A-Za-z_]*\)?=/[[ -z \"\$\\1\" ]] \\&\\& export \\1=/g"
 }
 
 while read file; do