From 2f78e74e7f2d8331ac4347bec0ac38ef66d976df Mon Sep 17 00:00:00 2001
From: Walter Doekes <walter+github@wjd.nu>
Date: Fri, 11 Nov 2022 10:47:01 +0100
Subject: [PATCH] Add versioning to Docker, so we can trace back every
 component

---
 Dockerfile | 4 +++-
 README.rst | 5 +++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index 7a44aea..475215b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,8 +6,10 @@ LABEL dockerfile-vcs="https://github.com/ossobv/alert-group-nl-log2slack"
 ENV PYTHONUNBUFFERED=1
 RUN pip install BeautifulSoup4 requests phpserialize
 COPY alert_group_nl_log2slack.py /srv/
+ARG GITVERSION
+RUN echo "$GITVERSION (built $(date +%Y-%m-%d))" >/srv/version
 CMD python3 -V && pip freeze && echo '.' && \
-    echo 'Starting publish-forever...' && \
+    echo 'Starting publish-forever...' $(cat /srv/version) && \
     ln -sf /usr/share/zoneinfo/${TIMEZONE:-Etc/UTC} /etc/localtime && \
     test -s /etc/localtime && \
     exec python3 /srv/alert_group_nl_log2slack.py publish
diff --git a/README.rst b/README.rst
index a64af43..4ae71c5 100644
--- a/README.rst
+++ b/README.rst
@@ -10,3 +10,8 @@ Requirements::
     KLANT_CODE = <pass>
     SLACK_WEBHOOK_URL = https://hooks.slack.com/services/T../B../a..
     TIMEZONE = Europe/Amsterdam  # used by Docker image
+
+Building::
+
+    docker build --build-arg=GITVERSION=$(git describe --always) \
+        -t $NAMESPACE/alert-group-nl-log2slack .