Merge branch 'julienben/redesign-pipeline' into maciejk/use-ar-related-versions

# Conflicts:
#	scripts/release/atomic_pipeline.py
#	scripts/release/build/image_build_process.py
#	scripts/release/pipeline_main.py

Author: MaciejKaras

scripts/release/build/image_build_process.py

@@ -43,7 +43,6 @@ def ecr_login_boto3(region: str, account_id: str):
 def ensure_buildx_builder(builder_name: str = DEFAULT_BUILDER_NAME) -> str:
     """
     Ensures a Docker Buildx builder exists for multi-platform builds.
-    This function is safe for concurrent execution across multiple processes.
 
     :param builder_name: Name for the buildx builder
     :return: The builder name that was created or reused
@@ -67,13 +66,6 @@ def ensure_buildx_builder(builder_name: str = DEFAULT_BUILDER_NAME) -> str:
         )
         logger.info(f"Created new buildx builder: {builder_name}")
     except DockerException as e:
-        # Check if this is a race condition (another process created the builder)
-        if hasattr(e, 'stderr') and 'existing instance for' in str(e.stderr):
-            logger.info(f"Builder '{builder_name}' was created by another process – using it.")
-            docker.buildx.use(builder_name)
-            return builder_name
-
-        # Otherwise, it's a real error
         logger.error(f"Failed to create buildx builder: {e}")
         raise
 
@@ -119,10 +111,7 @@ def execute_docker_build(
         if len(platforms) > 1:
             logger.info(f"Multi-platform build for {len(platforms)} architectures")
 
-        # Ensure buildx builder exists (safe for concurrent execution)
-        ensure_buildx_builder(builder_name)
-
-        # Build the image using buildx
+        # Build the image using buildx, builder must be already initialized
         docker_cmd.buildx.build(
             context_path=path,
             file=dockerfile,

scripts/release/pipeline_main.py

@@ -49,6 +49,10 @@
     SUPPORTED_PLATFORMS,
     ImageBuildConfiguration,
 )
+from scripts.release.build.image_build_process import (
+    DEFAULT_BUILDER_NAME,
+    ensure_buildx_builder,
+)
 
 """
 The goal of main.py, image_build_configuration.py and build_context.py is to provide a single source of truth for the build
@@ -209,6 +213,10 @@ def main():
     logger.info(f"Building image: {args.image}")
     logger.info(f"Build configuration: {build_config}")
 
+    # Create buildx builder
+    # It must be initialized here as opposed to in build_images.py so that parallel calls (such as agent builds) can access it
+    # and not face race conditions
+    ensure_buildx_builder(DEFAULT_BUILDER_NAME)
     build_image(args.image, build_config)