Allow blackd to be run as a package (#2800)

[etc/vim.git] / Dockerfile

diff --git a/Dockerfile b/Dockerfile
index a03d23a10782f09ea291c3a67880a758a5bef692..c393e29f6320e951f155d137264f8798c317555f 100644 (file)
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,8 +1,17 @@
-FROM python:3
+FROM python:3-slim AS builder
 
-ENV PYTHONDONTWRITEBYTECODE 1
-ENV PYTHONUNBUFFERED 1
+RUN mkdir /src
+COPY . /src/
+RUN pip install --no-cache-dir --upgrade pip setuptools wheel \
+    # Install build tools to compile dependencies that don't have prebuilt wheels
+    && apt update && apt install -y git build-essential \
+    && cd /src \
+    && pip install --user --no-cache-dir .[colorama,d]
 
-RUN pip install --upgrade --no-cache-dir black
+FROM python:3-slim
 
-ENTRYPOINT /usr/local/bin/black --check --diff  .
+# copy only Python packages to limit the image size
+COPY --from=builder /root/.local /root/.local
+ENV PATH=/root/.local/bin:$PATH
+
+CMD ["black"]