[core] support unbraced $name fields in $ style formats - #69
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nhairs merged 3 commits intoAug 15, 2026
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BaseJsonFormatter.parse() matched only ${name} for StringTemplateStyle,
so a format like "$asctime $message" produced no fields at all and the
resulting log records were missing every requested attribute. Python's
string.Template accepts both $name and ${name}.
The regex now matches both forms and skips the $$ escape, and parse()
picks whichever group matched.
Closes nhairs#18
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Thanks for your work on this @Sanjays2402
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Closes #18
parse()matched only${name}forStringTemplateStyle, so a$-style format like"$asctime $levelname $message"returned no fields at all and the emitted JSON was missing every requested attribute.string.Templateaccepts both$nameand${name}, so the regex now matches both and skips the$$escape.New
test_string_template_formatsits besidetest_percentage_format/test_comma_formatintests/test_formatters.pyand covers both forms plus$$; it fails on the current regex and passes with the fix.This change was prepared with AI assistance; the regression test was run locally and fails without the fix.