From 7e6ee423c4aae1c2ff4a51224de19769387aadc5 Mon Sep 17 00:00:00 2001
From: maxday <maxime.david@datadoghq.com>
Date: Thu, 26 Aug 2021 18:13:29 -0400
Subject: [PATCH] make docker build faster

---
 tests/Dockerfile | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/tests/Dockerfile b/tests/Dockerfile
index 218fe3b2..86bafa0b 100644
--- a/tests/Dockerfile
+++ b/tests/Dockerfile
@@ -3,9 +3,15 @@ FROM python:$python_version
 
 ENV PYTHONDONTWRITEBYTECODE True
 
-RUN mkdir -p /test
+RUN mkdir -p /test/datadog_lambda
 WORKDIR /test
 
+# Copy minimal subset of files to make pip install succeed and be cached (next docker builds will be way faster)
+COPY setup.py .
+COPY README.md .
+COPY datadog_lambda/__init__.py datadog_lambda/__init__.py 
+
+RUN pip install .[dev]
+
 # Install datadog-lambda with dev dependencies from local
 COPY . .
-RUN pip install .[dev]
\ No newline at end of file