Remove Dockerfile caching

Author: russcam

.ci/DockerFile

@@ -50,34 +50,13 @@ ENV CFG_RELEASE_CHANNEL=nightly
 # create app directory
 WORKDIR /usr/src/elasticsearch-rs
 
-# copy just enough to build dependencies
 COPY .ci/certs ./.ci/certs
 COPY Cargo.toml ./Cargo.toml
 COPY README.md ./README.md
+COPY api_generator ./api_generator
 COPY elasticsearch/Cargo.toml ./elasticsearch/Cargo.toml
-COPY api_generator/Cargo.toml ./api_generator/Cargo.toml
-COPY yaml_test_runner/Cargo.toml ./yaml_test_runner/Cargo.toml
-
-# cache dependencies
-RUN mkdir -p elasticsearch/src; \
-echo "// dummy file" > elasticsearch/src/lib.rs; \
-mkdir -p api_generator/src; \
-echo "// dummy file" > api_generator/src/lib.rs; \
-mkdir -p yaml_test_runner/src; \
-echo "// dummy file" > yaml_test_runner/src/main.rs; \
-cargo build --tests; \
-rm elasticsearch/src/lib.rs; \
-rm api_generator/src/lib.rs; \
-rm yaml_test_runner/src/main.rs;
-
-# copy all source
 COPY elasticsearch/src ./elasticsearch/src
 COPY elasticsearch/build.rs ./elasticsearch/build.rs
-COPY api_generator ./api_generator
 COPY yaml_test_runner ./yaml_test_runner
 
-# build
-RUN rm ./target/debug/deps/api_generator*; \
-rm ./target/debug/deps/elasticsearch*; \
-rm ./target/debug/deps/yaml_test_runner*; \
-cargo build --tests;
+RUN cargo build --tests