Downgrade Leiningen #bugs

technomancy/leiningen#2059

bin/lein

@@ -4,7 +4,7 @@
 # somewhere on your $PATH, like ~/bin. The rest of Leiningen will be
 # installed upon first run into the ~/.lein/self-installs directory.
 
-export LEIN_VERSION="2.6.1"
+export LEIN_VERSION="2.5.3"
 
 case $LEIN_VERSION in
     *SNAPSHOT) SNAPSHOT="YES" ;;
@@ -222,14 +222,9 @@ else # Not running from a checkout
     fi
 fi
 
-if [ ! -x "$JAVA_CMD" ] && ! type -f java >/dev/null
-then
-    >&2 echo "Leiningen coundn't find 'java' executable, which is required."
-    >&2 echo "Please either set JAVA_CMD or put java (>=1.6) in your \$PATH ($PATH)."
-    exit 1
-fi
-
-export LEIN_JAVA_CMD="${LEIN_JAVA_CMD:-${JAVA_CMD:-java}}"
+# TODO: explain what to do when Java is missing
+export JAVA_CMD="${JAVA_CMD:-"java"}"
+export LEIN_JAVA_CMD="${LEIN_JAVA_CMD:-$JAVA_CMD}"
 
 if [[ -z "${DRIP_INIT+x}" && "$(basename "$LEIN_JAVA_CMD")" == *drip* ]]; then
     export DRIP_INIT="$(printf -- '-e\n(require (quote leiningen.repl))')"