[PATCH 11/13] test: conftest: add support for describing FW_CFG environment in YAML

[Ahmad Fatoum <a.fatoum@barebox.org>]

We can inject new environment files via FW_CFG with pytest --env.
Add support for an env: key that allows manipulating the barebox
environment with only the YAML.

Co-developed-by: Claude <noreply@claude.ai>
Signed-off-by: Ahmad Fatoum <a.fatoum@barebox.org>
---
 conftest.py | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/conftest.py b/conftest.py
index ef6ca221a5db..4241ebce7702 100644
--- a/conftest.py
+++ b/conftest.py
@@ -143,6 +143,12 @@ def strategy(request, target, pytestconfig):  # noqa: max-complexity=30
     except KeyError:
         features = []
 
+    try:
+        main = target.env.config.data["targets"]["main"]
+        yaml_env = main["env"]
+    except KeyError:
+        yaml_env = {}
+
     try:
         main = target.env.config.data["targets"]["main"]
         qemu_bin = main["drivers"]["QEMUDriver"]["qemu_bin"]
@@ -218,6 +224,19 @@ def strategy(request, target, pytestconfig):  # noqa: max-complexity=30
         else:
             pytest.exit("--env unsupported for target\n", 1)
 
+    for envpath, value in yaml_env.items():
+        if virtio:
+            if value.startswith('@'):
+                source = f"file='{value[1:]}'"
+            else:
+                source = f"string='{value}'"
+
+            strategy.append_qemu_args(
+                '-fw_cfg', f'name=opt/org.barebox.env/{envpath},{source}'
+            )
+        else:
+            pytest.exit("env unsupported for target\n", 1)
+
     if len(pytestconfig.option.bootarg) > 0:
         strategy.append_qemu_bootargs(pytestconfig.option.bootarg)
 
-- 
2.47.3