[PATCH 1/2] data_smart: simple bracket matching inside python expressions

[Markus Lehtonen <markus.lehtonen@linux.intel.com>]

This expands the python expansion regex by matching curly brackets
inside python expressions. In its simplicity it is limited: e.g. it does
not correctly handle nested curly brackets or open curly brackets (i.e.
'{' without a matching '}') inside python expressions. Making python
parsing inside data_smart fully error-free would require significantly
more work, basically using/implementing python parser to correctly
handle python strings etc.

[YOCTO #8849]

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
---
 lib/bb/data_smart.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/bb/data_smart.py b/lib/bb/data_smart.py
index ca5774b..6069499 100644
--- a/lib/bb/data_smart.py
+++ b/lib/bb/data_smart.py
@@ -41,7 +41,7 @@ logger = logging.getLogger("BitBake.Data")
 __setvar_keyword__ = ["_append", "_prepend", "_remove"]
 __setvar_regexp__ = re.compile('(?P<base>.*?)(?P<keyword>_append|_prepend|_remove)(_(?P<add>.*))?$')
 __expand_var_regexp__ = re.compile(r"\${[^{}@\n\t ]+}")
-__expand_python_regexp__ = re.compile(r"\${@.+?}")
+__expand_python_regexp__ = re.compile(r"\${@(({[^{]*?})|.)+?}")
 
 def infer_caller_details(loginfo, parent = False, varval = True):
     """Save the caller the trouble of specifying everything."""
-- 
2.1.4