add github ci

.github/workflows/ci.yaml

@@ -0,0 +1,128 @@
+# Continuous integration testing for ChRIS Plugin.
+# https://github.com/FNNDSC/python-chrisapp-template/wiki/Continuous-Integration
+#
+# - on push and PR: run pytest
+# - on push to main: build and push container images as ":latest"
+# - on push to semver tag: build and push container image with tag and
+#                          upload plugin description to https://chrisstore.co
+
+name: build
+
+on:
+  push:
+    branches: [ main ]
+    tags:
+      - "v?[0-9]+.[0-9]+.[0-9]+*"
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    name: Build
+    if: github.event_name == 'push' || github.event_name == 'release'
+    runs-on: ubuntu-22.04
+
+    steps:
+      - name: Decide image tags
+        id: info
+        shell: python
+        run: |
+          import os
+          import itertools
+
+          def join_tag(t):
+            registry, repo, tag = t
+            return f'{registry}/{repo}:{tag}'.lower()
+
+          registries = ['docker.io', 'ghcr.io']
+          repos = ['${{ github.repository }}']
+          if '${{ github.ref_type }}' == 'branch':
+              tags = ['latest']
+          elif '${{ github.ref_type }}' == 'tag':
+              tag = '${{ github.ref_name }}'
+              version = tag[1:] if tag.startswith('v') else tag
+              tags = ['latest', version]
+          else:
+              tags = []
+
+          if '${{ github.ref_type }}' == 'tag':
+              local_tag = join_tag(('ghcr.io', '${{ github.repository }}', version))
+          else:
+              local_tag = join_tag(('localhost', '${{ github.repository }}', 'latest'))
+
+          product = itertools.product(registries, repos, tags)
+          tags_csv = ','.join(map(join_tag, product))
+          outputs = {
+              'tags_csv' : tags_csv,
+              'push'     : 'true' if tags_csv else 'false',
+              'local_tag': local_tag
+          }
+          with open(os.environ['GITHUB_OUTPUT'], 'a') as out:
+              for k, v in outputs.items():
+                  out.write(f'{k}={v}\n')
+
+      - uses: actions/checkout@v3
+        # QEMU is used for non-x86_64 builds
+      - uses: docker/setup-qemu-action@v3
+        # buildx adds additional features to docker build
+      - uses: docker/setup-buildx-action@v3
+        with:
+          driver-opts: network=host
+
+        # Here, we want to do the docker build twice:
+        # The first build pushes to our local registry for testing.
+        # The second build pushes to Docker Hub and ghcr.io
+      - name: Build (local only)
+        uses: docker/build-push-action@v3
+        id: docker_build
+        with:
+          context: .
+          file: ./Dockerfile
+          tags: ${{ steps.info.outputs.local_tag }}
+          load: true
+          cache-from: type=gha
+      - name: Login to DockerHub
+        if: (github.event_name == 'push' || github.event_name == 'release') && contains(steps.info.outputs.tags_csv, 'docker.io')
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_PASSWORD }}
+      - name: Login to GitHub Container Registry
+        if: (github.event_name == 'push' || github.event_name == 'release') && contains(steps.info.outputs.tags_csv, 'ghcr.io')
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build and push
+        uses: docker/build-push-action@v3
+        if: (github.event_name == 'push' || github.event_name == 'release')
+        with:
+          context: .
+          file: ./Dockerfile
+          tags: ${{ steps.info.outputs.tags_csv }}
+          # linux/ppc64le not working, see https://github.com/ANTsX/ANTs/issues/1644
+          platforms: linux/amd64,linux/arm64
+          push: ${{ steps.info.outputs.push }}
+          cache-to: type=gha,mode=max
+
+      - name: Upload ChRIS Plugin
+        id: upload
+        if: github.ref_type == 'tag'
+        uses: FNNDSC/upload-chris-plugin@v1
+        with:
+          dock_image: ${{ steps.info.outputs.local_tag }}
+          username: ${{ secrets.CHRISPROJECT_USERNAME }}
+          password: ${{ secrets.CHRISPROJECT_PASSWORD }}
+          chris_url: https://cube.chrisproject.org/api/v1/
+          compute_names: host,galena
+
+      - name: Update DockerHub description
+        if: steps.upload.outcome == 'success'
+        uses: peter-evans/dockerhub-description@v3
+        continue-on-error: true  # it is not crucial that this works
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_PASSWORD }}
+          short-description: ${{ steps.upload.outputs.title }}
+          readme-filepath: ./README.md