ENH: Support podman Linux builds

Author: thewtex

scripts/dockcross-manylinux-build-module-wheels.sh

@@ -49,6 +49,9 @@
 # Handle case where the script directory is not the working directory
 script_dir=$(cd $(dirname $0) || exit 1; pwd)
 source "${script_dir}/dockcross-manylinux-set-vars.sh"
+source "${script_dir}/oci_exe.sh"
+
+oci_exe=$(ociExe)
 
 if [[ -n ${ITK_MODULE_PREQ} ]]; then
   echo "Building module dependencies ${ITK_MODULE_PREQ}"
@@ -81,14 +84,14 @@ if [[ "${TARGET_ARCH}" = "aarch64" ]]; then
     docker_prefix="sudo"
   fi
 
-  ${docker_prefix} docker run --privileged --rm tonistiigi/binfmt --install all
+  ${docker_prefix} $oci_exe run --privileged --rm tonistiigi/binfmt --install all
 
   # Build wheels
   DOCKER_ARGS+=" -v $(pwd):/work/ --rm"
-  ${docker_prefix} docker run $DOCKER_ARGS ${CONTAINER_SOURCE} "/ITKPythonPackage/scripts/internal/manylinux-aarch64-build-module-wheels.sh" "$@"
+  ${docker_prefix} $oci_exe run $DOCKER_ARGS ${CONTAINER_SOURCE} "/ITKPythonPackage/scripts/internal/manylinux-aarch64-build-module-wheels.sh" "$@"
 else
   # Generate dockcross scripts
-  docker run --rm ${CONTAINER_SOURCE} > /tmp/dockcross-manylinux-x64
+  $oci_exe run --rm ${CONTAINER_SOURCE} > /tmp/dockcross-manylinux-x64
   chmod u+x /tmp/dockcross-manylinux-x64
 
   # Build wheels

scripts/dockcross-manylinux-build-wheels.sh

@@ -17,6 +17,10 @@
 #   export IMAGE_TAG=20221205-459c9f0
 #   scripts/dockcross-manylinux-build-module-wheels.sh cp39
 #
+script_dir=$(cd $(dirname $0) || exit 1; pwd)
+source "${script_dir}/oci_exe.sh"
+
+oci_exe=$(ociExe)
 
 MANYLINUX_VERSION=${MANYLINUX_VERSION:=_2_28}
 
@@ -30,11 +34,9 @@ else
 fi
 
 # Generate dockcross scripts
-docker run --rm dockcross/manylinux${MANYLINUX_VERSION}-x64:${IMAGE_TAG} > /tmp/dockcross-manylinux-x64
+$oci_exe run --rm docker.io/dockcross/manylinux${MANYLINUX_VERSION}-x64:${IMAGE_TAG} > /tmp/dockcross-manylinux-x64
 chmod u+x /tmp/dockcross-manylinux-x64
 
-script_dir=$(cd $(dirname $0) || exit 1; pwd)
-
 # Build wheels
 pushd $script_dir/..
 mkdir -p dist

scripts/dockcross-manylinux-set-vars.sh

@@ -52,7 +52,7 @@ fi
 # Set container for requested version/arch/tag.
 if [[ ${TARGET_ARCH} == x64 ]]; then
   MANYLINUX_IMAGE_NAME=${MANYLINUX_IMAGE_NAME:="manylinux${MANYLINUX_VERSION}-${TARGET_ARCH}:${IMAGE_TAG}"}
-  CONTAINER_SOURCE="dockcross/${MANYLINUX_IMAGE_NAME}"
+  CONTAINER_SOURCE="docker.io/dockcross/${MANYLINUX_IMAGE_NAME}"
 elif [[ ${TARGET_ARCH} == aarch64 ]]; then
   MANYLINUX_IMAGE_NAME=${MANYLINUX_IMAGE_NAME:="manylinux${MANYLINUX_VERSION}_${TARGET_ARCH}:${IMAGE_TAG}"}
   CONTAINER_SOURCE="quay.io/pypa/${MANYLINUX_IMAGE_NAME}"

scripts/oci_exe.sh

@@ -0,0 +1,23 @@
+function ociExe() {
+    # Check for OCI_EXE environmental variable
+    if [[ -n "$OCI_EXE" && -x "$OCI_EXE" ]]; then
+        echo "$OCI_EXE"
+        return
+    fi
+
+    # Check for podman executable
+    if which podman > /dev/null 2>&1; then
+        echo "podman"
+        return
+    fi
+
+    # Check for docker executable
+    if which docker > /dev/null 2>&1; then
+        echo "docker"
+        return
+    fi
+
+    # If none of the above exist, return nothing
+    echo "Could not find podman or docker executable" >&2
+    exit 1
+}