Add stacktrace builtin

[izissise]

return a list of dict containing filename, package_name, subrepo and function leading to the current scope where stacktrace was called

This useful when using breakpoint() to have a stacktrace. Also it can be useful to tag current function name to a build_rule

[peterebden]

I'm not convinced we need this. The build language is meant to be minimal and it isn't meant to need to do a lot of introspection - the syntax is Pythonic but it deliberately doesn't have a lot of Python's dynamism.

[izissise]

While I understand the intention behind keeping the build language minimal, having stacktrace feature can improve debugging and development efficiency. It can also be beneficial for newcomers as a way to understand how subinclude and subrepo work.

It is true that it introduce some dynamism, but I don't see any-other alternative to able to a genrule with the current function name.

Regards, Hugues

[stale[bot]]

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[izissise]

I still would like this feature, to auto generate rules name from the function name or the N-1 function name. Is there an alternative way to do this ?