From 408740f14b0b132deada971a438242015fc2322b Mon Sep 17 00:00:00 2001
From: Benjamin Gutzmann <gutzemann@gmail.com>
Date: Fri, 17 Jan 2025 23:56:27 +0100
Subject: [PATCH] Docker: Add platform `linux/arm/v7`

---
 .github/workflows/docker-publish.yml |  2 +-
 CHANGELOG.md                         |  3 +++
 Dockerfile                           | 12 ++++++++++++
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/docker-publish.yml b/.github/workflows/docker-publish.yml
index bc534a949..f714daa4f 100644
--- a/.github/workflows/docker-publish.yml
+++ b/.github/workflows/docker-publish.yml
@@ -130,7 +130,7 @@ jobs:
         with:
           context: .
           file: Dockerfile
-          platforms: linux/amd64,linux/arm64  # TODO: add linux/arm/v7
+          platforms: linux/amd64,linux/arm64,linux/arm/v7
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           push: true
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8cc6268f2..b94c5ba1c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 ## Development
 
+### Feature
+- Docker: Add platform `linux/arm/v7`
+
 ## 0.102.0 - 2025-01-17
 
 ### Feature
diff --git a/Dockerfile b/Dockerfile
index dd9249489..bcff96dfc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,6 +5,13 @@ ENV TERM=linux
 
 # Install build prerequisites.
 RUN rm -f /etc/apt/apt.conf.d/docker-clean; echo 'Binary::apt::APT::Keep-Downloaded-Packages "true";' > /etc/apt/apt.conf.d/keep-cache
+
+# the following two lines are temporarily required
+# we need proj-bin>=9.2 which is not available in bookworm, so we take it from sid
+RUN echo "deb http://deb.debian.org/debian sid main" >> /etc/apt/sources.list
+# reduce sid priorty to avoid installing other packages from sid, install proj-bin from sid everything else from bookworm
+RUN echo "Package: *\nPin: release a=bookworm\nPin-Priority: 900\n\nPackage: proj-bin\nPin: release a=sid\nPin-Priority: 800" > /etc/apt/preferences.d/proj-bin
+
 RUN \
     --mount=type=cache,id=apt,sharing=locked,target=/var/cache/apt \
     --mount=type=cache,id=apt,sharing=locked,target=/var/lib/apt \
@@ -14,8 +21,13 @@ RUN \
       git build-essential python3-dev python3-pip python3-venv python3-wheel \
       python3-h5py ca-certificates pkg-config libhdf5-dev
 
+# install proj-bin in linux/arm/v7
+RUN if [ "$(uname -m)" = "armv7l" ]; then apt-get install --no-install-recommends --no-install-suggests --yes proj-bin; fi
+
 RUN pip install uv
 
+# install pyproj (required by wradlib) in linux/arm/v7
+RUN if [ "$(uname -m)" = "armv7l" ]; then uv pip install --system pyproj; fi
 # Install wradlib.
 RUN uv pip install --system wradlib