From de5c26ed4a996f3d0c3929314481ebd36427c453 Mon Sep 17 00:00:00 2001
From: Ramon Wijnands <rwijnands@smart-robotics.nl>
Date: Wed, 29 Jul 2020 11:05:05 +0200
Subject: [PATCH] Convert black back to a single stage based on review comments

---
 black/Dockerfile | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/black/Dockerfile b/black/Dockerfile
index e190d6b..705e4d0 100644
--- a/black/Dockerfile
+++ b/black/Dockerfile
@@ -1,18 +1,13 @@
-FROM python:3-alpine as black-build
-
-# we don't want gcc in the final image, so let's do a multi stage build
-RUN apk update && apk add --no-cache build-base
-RUN pip install --user --upgrade black
-
 FROM python:3-alpine
 
 LABEL io.whalebrew.name 'black'
 LABEL io.whalebrew.config.working_dir '/workdir'
 WORKDIR /workdir
 
-# copy only the installed files from black
-COPY --from=black-build /root/.local /root/.local
-ENV PATH=/root/.local/bin:$PATH
+# we don't want gcc in the final image, so remove it in one docker layer
+RUN apk add --no-cache build-base \
+    && pip install --no-cache-dir --upgrade black \
+    && apk del build-base
 
 ENTRYPOINT ["black"]
 CMD ["--help"]
\ No newline at end of file