add Docker support

.github/workflows/containers.yml

@@ -0,0 +1,78 @@
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
+name: Publish Docker image
+
+on:
+  workflow_run:
+    workflows: ["Build"]
+    types: [completed]
+    branches: [master]
+  push:
+    tags:
+      - '[0-9]+.[0-9]+.[0-9]+'
+
+env:
+  DOCKER_REPOSITORY: ${{ secrets.DOCKER_REPOSITORY || 'geopython/pygeometa' }}
+
+jobs:
+  on-success:
+    name: Build, Test and Push Docker Image to DockerHub
+    runs-on: ubuntu-24.04
+    if: ${{ github.event.workflow_run.conclusion == 'success' || github.event_name == 'workflow_dispatch' || github.event_name == 'push' }}
+    permissions:
+      packages: write
+      contents: read
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@master
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2.1.0
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2.2.1
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v2.1.0
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v2.1.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v4.0.1
+        with:
+          images: |
+            ${{ env.DOCKER_REPOSITORY }}
+            ghcr.io/${{ github.repository }}
+          tags: |
+            type=semver,pattern={{version}}
+            type=raw,value=latest,enable=${{ endsWith(github.ref, github.event.repository.default_branch) }}
+
+      - name: Build and push Docker images
+        uses: docker/build-push-action@v3.3.0
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          platforms: linux/arm64, linux/amd64
+
+  on-failure:
+    runs-on: ubuntu-24.04
+    if: ${{ github.event.workflow_run.conclusion == 'failure' }}
+    steps:
+      - name: Print Test Fail
+        run: echo Tests Failed

Dockerfile

@@ -0,0 +1,62 @@
+# =================================================================
+#
+# Terms and Conditions of Use
+#
+# Unless otherwise noted, computer program source code of this
+# distribution # is covered under Crown Copyright, Government of
+# Canada, and is distributed under the MIT License.
+#
+# The Canada wordmark and related graphics associated with this
+# distribution are protected under trademark law and copyright law.
+# No permission is granted to use them outside the parameters of
+# the Government of Canada's corporate identity program. For
+# more information, see
+# http://www.tbs-sct.gc.ca/fip-pcim/index-eng.asp
+#
+# Copyright title to all 3rd party software distributed with this
+# software is held by the respective copyright holders as noted in
+# those files. Users are asked to read the 3rd Party Licenses
+# referenced with those assets.
+#
+# Copyright (c) 2026 Tom Kralidis
+#
+# Permission is hereby granted, free of charge, to any person
+# obtaining a copy of this software and associated documentation
+# files (the "Software"), to deal in the Software without
+# restriction, including without limitation the rights to use,
+# copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the
+# Software is furnished to do so, subject to the following
+# conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+# OTHER DEALINGS IN THE SOFTWARE.
+#
+# =================================================================
+
+FROM python:3.14-slim
+
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1
+
+RUN useradd -m pygeometa
+
+WORKDIR /app
+COPY ./ /app
+
+RUN python3.14 -m venv --system-site-packages /venv && \
+    /venv/bin/pip3 install .
+
+USER pygeometa
+
+
+ENTRYPOINT ["/venv/bin/pygeometa"]

README.md

@@ -1,5 +1,7 @@
 [![Build Status](https://github.com/geopython/pygeometa/workflows/build%20%E2%9A%99%EF%B8%8F/badge.svg)](https://github.com/geopython/pygeometa/actions)
 [![Join the chat at https://matrix.to/#/#geopython_pygeometa:gitter.im](https://badges.gitter.im/Join%20Chat.svg)](https://matrix.to/#/#geopython_pygeometa:gitter.im)
+[![Docker](https://github.com/geopython/pygeometa/actions/workflows/containers.yml/badge.svg)](https://github.com/geopython/pygeometa/actions/workflows/containers.yml)
+[![Vulnerabilities](https://github.com/geopython/pygeometa/actions/workflows/vulnerabilities.yml/badge.svg)](https://github.com/geopython/pygeometa/actions/workflows/vulnerabilities.yml)
 
 # pygeometa
 
@@ -73,6 +75,16 @@ pygeometa metadata transform path/to/file.xml --input-schema=iso19139 --output-s
 pygeometa metadata transform path/to/file.xml --input-schema=autodetect --output-schema=oarec-record  # --input-schema=autodetect is default
 ```
 
+## Docker
+
+pygeometa can also be run as a Docker application:
+
+```bash
+# run pygeometa via Docker, and map local path /path/to/my-data-dir to /data in Docker
+docker run -ti -v /path/to/my-data-dir/:/data/ pygeometa:latest metadata generate --schema oarec-record /data/sample.mcf.yml
+```
+
+
 ### Supported schemas
 Schemas supported by pygeometa:
 * CSV on the web, [reference](https://www.w3.org/TR/2015/REC-tabular-metadata-20151217/)