1 files changed, 59 insertions, 0 deletions
diff --git a/meta-arm/lib/fvp/conffile.py b/meta-arm/lib/fvp/conffile.py
new file mode 100644
index 00000000..603851d1
--- /dev/null
+++ b/meta-arm/lib/fvp/conffile.py
@@ -0,0 +1,59 @@
+import json
+import pathlib
+import os
+
+
+def get_image_directory(machine=None):
+    """
+    Get the DEPLOY_DIR_IMAGE for the specified machine
+    (or the configured machine if not set).
+    """
+    try:
+        import bb.tinfoil
+    except ImportError as e:
+        raise RuntimeError("Cannot connect to BitBake, did you oe-init-build-env?") from e
+
+    if machine:
+        os.environ["MACHINE"] = machine
+
+    with bb.tinfoil.Tinfoil() as tinfoil:
+        tinfoil.prepare(config_only=True)
+        image_dir = tinfoil.config_data.getVar("DEPLOY_DIR_IMAGE")
+        return pathlib.Path(image_dir)
+
+def find(machine):
+    image_dir = get_image_directory(machine)
+    # All .fvpconf configuration files
+    configs = image_dir.glob("*.fvpconf")
+    # Just the files
+    configs = [p for p in configs if p.is_file() and not p.is_symlink()]
+    if not configs:
+            print(f"Cannot find any .fvpconf in {image_dir}")
+            raise RuntimeError()
+    # Sorted by modification time
+    configs = sorted(configs, key=lambda p: p.stat().st_mtime)
+    return configs[-1]
+
+
+def load(config_file):
+    with open(config_file) as f:
+        config = json.load(f)
+
+    # Ensure that all expected keys are present
+    def sanitise(key, value):
+        if key not in config or config[key] is None:
+            config[key] = value
+    sanitise("fvp-bindir", "")
+    sanitise("exe", "")
+    sanitise("parameters", {})
+    sanitise("data", {})
+    sanitise("applications", {})
+    sanitise("terminals", {})
+    sanitise("args", [])
+    sanitise("consoles", {})
+    sanitise("env", {})
+
+    if not config["exe"]:
+        raise ValueError("Required value FVP_EXE not set in machine configuration")
+
+    return config