Enable remote cache if applicable (#297)

* Add caching mechanism

* Add ccache to CUDA and C

* Enable verbose output for ORT

* Update cache installation

* Update Dockerfile instructions

* Fix pre-commit issue

Author: mc-nv

tools/gen_ort_dockerfile.py

@@ -132,6 +132,22 @@ def dockerfile_for_linux(output_file):
 RUN pip3 install patchelf==0.17.2
 """
     else:
+        if os.getenv("CCACHE_REMOTE_ONLY") and os.getenv("CCACHE_REMOTE_STORAGE"):
+            df += """
+ENV CCACHE_REMOTE_ONLY="true" \\
+    CCACHE_REMOTE_STORAGE="{}" \\
+    CMAKE_CXX_COMPILER_LAUNCHER="ccache" \\
+    CMAKE_C_COMPILER_LAUNCHER="ccache" \\
+    CMAKE_CUDA_COMPILER_LAUNCHER="ccache" \\
+    VERBOSE=1
+
+RUN apt-get update \\
+      && apt-get install -y --no-install-recommends ccache && ccache -p \\
+      && rm -rf /var/lib/apt/lists/*
+""".format(
+                os.getenv("CCACHE_REMOTE_STORAGE")
+            )
+
         df += """
 
 RUN apt-get update && apt-get install -y --no-install-recommends \