USHIFT-6715: Enable building multiple bootc blueprint layers in parallel

test/bin/ci_phase_iso_build.sh

@@ -70,8 +70,8 @@ update_build_cache() {
     # Build templates
     $(dry_run) bash -x ./bin/build_bootc_images.sh -g ./image-blueprints-bootc/templates
     # Build the bootc base layer and brew RPMs to be cached
-    $(dry_run) bash -x ./bin/build_bootc_images.sh -l ./image-blueprints-bootc/layer1-base
-    $(dry_run) bash -x ./bin/build_bootc_images.sh -l ./image-blueprints-bootc/layer4-release
+    $(dry_run) bash -x ./bin/build_bootc_images.sh -l ./image-blueprints-bootc/el9/layer1-base -l ./image-blueprints-bootc/el10/layer1-base
+    $(dry_run) bash -x ./bin/build_bootc_images.sh -l ./image-blueprints-bootc/el9/layer4-release -l ./image-blueprints-bootc/el10/layer4-release
 
     # Prepare for the cache upload by stopping composer services and cleaning
     # temporary artifacts
@@ -132,31 +132,33 @@ run_bootc_image_build() {
 
         if [[ "${os}" == "el9" || "${os}" == "el10" ]]; then
 
-            $(dry_run) bash -x ./bin/build_bootc_images.sh -l ./image-blueprints-bootc/layer1-base
+            $(dry_run) bash -x ./bin/build_bootc_images.sh -l "./image-blueprints-bootc/${os}/layer1-base"
             $(dry_run) bash -x ./bin/build_bootc_images.sh -l "./image-blueprints-bootc/${os}/layer2-presubmit"
 
             if [[ "${os}" == "el10" ]]; then
                 # Build el9 images for upgrade tests
+                $(dry_run) bash -x ./bin/build_bootc_images.sh -l ./image-blueprints-bootc/el9/layer1-base
                 $(dry_run) bash -x ./bin/build_bootc_images.sh -l ./image-blueprints-bootc/el9/layer2-presubmit
             fi
 
             if [[ "${CI_JOB_NAME}" =~ .*periodic.* ]]; then
                 $(dry_run) bash -x ./bin/build_bootc_images.sh -l "./image-blueprints-bootc/${os}/layer3-periodic"
             fi
+            if [[ "${CI_JOB_NAME}" =~ .*release.* ]]; then
+                $(dry_run) bash -x ./bin/build_bootc_images.sh -l "./image-blueprints-bootc/${os}/layer4-release"
+            fi
         fi
 
         # Build upstream images
         if [[ "${CI_JOB_NAME}" =~ .*upstream.* ]]; then
             $(dry_run) bash -x ./bin/build_bootc_images.sh -l ./image-blueprints-bootc/upstream
         fi
     else
-        $(dry_run) bash -x ./bin/build_bootc_images.sh -l ./image-blueprints-bootc/layer1-base
         # Full build for all OS versions
-        for os_ver in el9 el10; do
-            $(dry_run) bash -x ./bin/build_bootc_images.sh -l "./image-blueprints-bootc/${os_ver}/layer2-presubmit"
-            $(dry_run) bash -x ./bin/build_bootc_images.sh -l "./image-blueprints-bootc/${os_ver}/layer3-periodic"
-        done
-        $(dry_run) bash -x ./bin/build_bootc_images.sh -l ./image-blueprints-bootc/layer4-release
+        $(dry_run) bash -x ./bin/build_bootc_images.sh -l ./image-blueprints-bootc/el9/layer1-base -l ./image-blueprints-bootc/el10/layer1-base
+        $(dry_run) bash -x ./bin/build_bootc_images.sh -l ./image-blueprints-bootc/el9/layer2-presubmit -l ./image-blueprints-bootc/el10/layer2-presubmit
+        $(dry_run) bash -x ./bin/build_bootc_images.sh -l ./image-blueprints-bootc/el9/layer3-periodic -l ./image-blueprints-bootc/el10/layer3-periodic
+        $(dry_run) bash -x ./bin/build_bootc_images.sh -l ./image-blueprints-bootc/el9/layer4-release -l ./image-blueprints-bootc/el10/layer4-release
         $(dry_run) bash -x ./bin/build_bootc_images.sh -l ./image-blueprints-bootc/upstream
     fi
 }

test/bin/pyutils/build_bootc_images.py

@@ -581,7 +581,7 @@ def main():
                         choices=["image-bootc", "containerfile", "container-encapsulate"],
                         help="Only build images of the specified type.")
     dirgroup = parser.add_mutually_exclusive_group(required=False)
-    dirgroup.add_argument("-l", "--layer-dir", type=str, help="Path to the layer directory to process.")
+    dirgroup.add_argument("-l", "--layer-dir", action="append", default=[], help="Path to the layer directory to process. Can be specified multiple times.")
     dirgroup.add_argument("-g", "--group-dir", type=str, help="Path to the group directory to process.")
     dirgroup.add_argument("-t", "--template", type=str, help="Path to a template to build. Allows glob patterns (requires double qoutes).")
 
@@ -600,8 +600,12 @@ def main():
             args.group_dir = os.path.abspath(args.group_dir)
             dir2process = args.group_dir
         if args.layer_dir:
-            args.layer_dir = os.path.abspath(args.layer_dir)
-            dir2process = args.layer_dir
+            # Convert input layer directories to absolute paths
+            args.layer_dir = [os.path.abspath(d) for d in args.layer_dir]
+            # Validate each layer directory exists
+            for layer_dir in args.layer_dir:
+                if not os.path.isdir(layer_dir):
+                    raise Exception(f"The layer directory '{layer_dir}' does not exist")
         if args.template:
             args.template = os.path.abspath(args.template)
             dir2process = os.path.dirname(args.template)
@@ -672,11 +676,12 @@ def main():
         PULL_SECRET = opull_secret
         # Process layer directory contents sorted by length and then alphabetically
         if args.layer_dir:
-            for item in sorted(os.listdir(args.layer_dir), key=lambda i: (len(i), i)):
-                item_path = os.path.join(args.layer_dir, item)
-                # Check if this item is a directory
-                if os.path.isdir(item_path):
-                    process_group(item_path, args.build_type, dry_run=args.dry_run)
+            for layer_dir in args.layer_dir:
+                for item in sorted(os.listdir(layer_dir), key=lambda i: (len(i), i)):
+                    item_path = os.path.join(layer_dir, item)
+                    # Check if this item is a directory
+                    if os.path.isdir(item_path):
+                        process_group(item_path, args.build_type, dry_run=args.dry_run)
         else:
             # Process individual group directory or template
             process_group(dir2process, args.build_type, pattern, args.dry_run)