Use dockerfile to build skopeo version 1.13.0

.github/workflows/podman_tests.yaml

@@ -14,10 +14,12 @@ jobs:
         uses: taiki-e/install-action@just
       - name: Install requirements
         run: sudo env PATH=$PATH just ci-prepare
+      - name: Build latest skopeo # because ubuntu 22.04 does not have latest, and podman tests depend on that
+        run: docker build -f ./hack/skopeo.Dockerfile . --target skopeo-rootfs --output=/ && skopeo --version
       - run: just youki-dev
       - run: sudo cp youki /usr/local/bin
       - name: Install requirements for Podman
-        run: sudo apt-get install -y pkg-config libsystemd-dev libdbus-glib-1-dev libelf-dev libseccomp-dev libgpgme-dev bats
+        run: sudo apt-get install -y pkg-config libsystemd-dev libdbus-glib-1-dev libelf-dev libseccomp-dev libgpgme-dev bats skopeo
       - name: Clone podman repository
         uses: actions/checkout@v3
         with:

hack/skopeo.Dockerfile

@@ -0,0 +1,23 @@
+# ref https://github.com/containers/skopeo/issues/1648#issuecomment-1132161659
+FROM golang:1.20 AS skopeo-build
+
+WORKDIR /usr/src/skopeo
+
+ARG SKOPEO_VERSION="1.13.1"
+RUN curl -fsSL "https://github.com/containers/skopeo/archive/v${SKOPEO_VERSION}.tar.gz" \
+  | tar -xzf - --strip-components=1
+
+RUN CGO_ENABLED=0 DISABLE_DOCS=1 make BUILDTAGS=containers_image_openpgp GO_DYN_FLAGS=
+
+RUN ./bin/skopeo --version
+
+
+FROM scratch AS skopeo-rootfs
+
+COPY --from=skopeo-build /usr/src/skopeo/bin/skopeo /usr/local/bin/
+COPY --from=skopeo-build /usr/src/skopeo/default-policy.json /etc/containers/policy.json
+
+
+FROM scratch
+
+COPY --from=skopeo-rootfs / /