fix: Check for buildx before using docker

process/drivers/docker_driver.rs

@@ -57,6 +57,10 @@ impl DockerDriver {
     fn setup() -> Result<()> {
         trace!("DockerDriver::setup()");
 
+        if !Self::has_buildx() {
+            bail!("Docker Buildx is required to use the Docker driver");
+        }
+
         let mut lock = DOCKER_SETUP.lock().expect("Should lock");
 
         if *lock {
@@ -105,6 +109,13 @@ impl DockerDriver {
         drop(lock);
         Ok(())
     }
+
+    #[must_use]
+    pub fn has_buildx() -> bool {
+        pipe!(cmd!("docker", "--help") | cmd!("grep", "buildx"))
+            .status()
+            .is_ok_and(|status| status.success())
+    }
 }
 
 impl DriverVersion for DockerDriver {

process/drivers/types.rs

@@ -58,7 +58,9 @@ impl DetermineDriver<BuildDriverType> for Option<BuildDriverType> {
                 blue_build_utils::check_command_exists("podman"),
                 blue_build_utils::check_command_exists("buildah"),
             ) {
-                (Ok(_docker), _, _) if DockerDriver::is_supported_version() => {
+                (Ok(_docker), _, _)
+                    if DockerDriver::is_supported_version() && DockerDriver::has_buildx() =>
+                {
                     BuildDriverType::Docker
                 }
                 (_, Ok(_podman), _) if PodmanDriver::is_supported_version() => {
@@ -70,7 +72,10 @@ impl DetermineDriver<BuildDriverType> for Option<BuildDriverType> {
                 _ => panic!(
                     "{}{}{}{}",
                     "Could not determine strategy, ",
-                    format_args!("need either docker version {}, ", DockerDriver::VERSION_REQ,),
+                    format_args!(
+                        "need either docker version {} with buildx, ",
+                        DockerDriver::VERSION_REQ,
+                    ),
                     format_args!("podman version {}, ", PodmanDriver::VERSION_REQ,),
                     format_args!(
                         "or buildah version {} to continue",