Use sh to run script

Author: tesuji

.travis.yml

@@ -63,16 +63,16 @@ script:
         *)                   DOCKER=$TARGET ;;
       esac;
       if [ -n "$DOCKER" ]; then
-          bash ci/build-run-docker.sh "$DOCKER" "$TARGET" "$SKIP_TESTS";
+          sh ci/build-run-docker.sh "$DOCKER" "$TARGET" "$SKIP_TESTS";
       else
-          PATH="$HOME/rust/bin:$PATH" bash ci/run.sh;
+          PATH="$HOME/rust/bin:$PATH" sh ci/run.sh;
       fi
   - if [ "${TRAVIS_OS_NAME}" = linux ]; then
       shellcheck -e SC1090 -- rustup-init.sh ci/*.sh;
     fi
 
 before_deploy:
-  - bash ci/prepare-deploy-travis.sh
+  - sh ci/prepare-deploy-travis.sh
 
 deploy:
   - provider: s3

ci/build-run-docker.sh

@@ -16,7 +16,7 @@ SKIP_TESTS="$3"
 
 travis_fold start "fetch.image.${TARGET}"
 travis_time_start
-travis_do_cmd bash ci/fetch-rust-docker.sh "$TARGET"
+travis_do_cmd sh ci/fetch-rust-docker.sh "$TARGET"
 travis_time_finish
 travis_fold end "fetch.image.${TARGET}"
 
@@ -45,7 +45,7 @@ docker run \
   --tty \
   --init \
   "$DOCKER" \
-  -c 'PATH="$PATH":/travis-rust/bin exec bash ci/run.sh'
+  -c 'PATH="$PATH":/travis-rust/bin exec sh ci/run.sh'
 
 # check that rustup-init was built with ssl support
 # see https://github.com/rust-lang/rustup.rs/issues/1051