[OE-Core][PATCH v2 5/5] oeqa/utils/postactions: testimage: add host disk usage stat as post action

["Alexis Lothoré" <alexis.lothore@bootlin.com>]

From: Alexis Lothoré <alexis.lothore@bootlin.com>

Since the target under test can be a virtualized guest, when some tests
fail because of disk usage (see [1]), also fetch disk usage statistics from
host to allow checking whether a host disk space saturation could affect
running tests.

[1] https://bugzilla.yoctoproject.org/show_bug.cgi?id=15220

Signed-off-by: Alexis Lothoré <alexis.lothore@bootlin.com>
---
Changes in v2:
- use new shared helper get_json_result_dir()
---
 meta/lib/oeqa/utils/postactions.py | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/meta/lib/oeqa/utils/postactions.py b/meta/lib/oeqa/utils/postactions.py
index 008968b56a3f..03cecdc21578 100644
--- a/meta/lib/oeqa/utils/postactions.py
+++ b/meta/lib/oeqa/utils/postactions.py
@@ -32,6 +32,16 @@ def get_target_disk_usage(d, tc):
     except Exception as e:
         bb.warn(f"Can not get target disk usage: {e}")
 
+def get_host_disk_usage(d, tc):
+    import subprocess
+
+    output_file = os.path.join(get_json_result_dir(d), "artifacts", "host_disk_usage.txt")
+    try:
+        with open(output_file, 'w') as f:
+            output = subprocess.run(['/usr/bin/df', '-hl'], check=True, text=True, stdout=f)
+    except Exception as e:
+        bb.warn(f"Can not get host disk usage: {e}")
+
 ##################################################################
 # Artifacts retrieval
 ##################################################################
@@ -80,7 +90,8 @@ def run_failed_tests_post_actions(d, tc):
     post_actions=[
         create_artifacts_directory,
         list_and_fetch_failed_tests_artifacts,
-        get_target_disk_usage
+        get_target_disk_usage,
+        get_host_disk_usage
     ]
 
     for action in post_actions:
-- 
2.43.1