don't recursively call docker

.travis.yml

@@ -62,8 +62,7 @@ matrix:
             - qemu-user-static
     - env: TARGET=powerpc64le-unknown-linux-gnu
       os: linux
-      services:
-        - docker
+      services: docker
       sudo: required
     - env: TARGET=x86_64-apple-darwin
       os: osx

ci/env.sh

@@ -29,7 +29,9 @@ case $TARGET in
         export QEMU_LD_PREFIX=/usr/powerpc-linux-gnu
         ;;
     powerpc64le-unknown-linux-gnu)
-        export DOCKER=y
+        if [[ -z $DOCKER ]]; then
+            export DOCKER=y
+        fi
         export PREFIX=powerpc64le-linux-gnu-
         export QEMU=qemu-ppc64le
         export QEMU_LD_PREFIX=/usr/powerpc64le-linux-gnu

ci/script.sh

@@ -32,8 +32,9 @@ inspect() {
 }
 
 main() {
-    if [[ $DOCKER ]]; then
+    if [[ $DOCKER == "y" ]]; then
         docker run \
+               -e DOCKER=n \
                -e TARGET=$TARGET \
                -e TRAVIS_OS_NAME=$TRAVIS_OS_NAME \
                -v $(pwd):/mnt \
@@ -44,7 +45,6 @@ main() {
         run_tests
         inspect
     fi
-
 }
 
 main