Looking for a Go way to extract all consts from a ...
# deva
Ariel Shaqed (Scolnicov)
03/05/2023, 8:04 AMLooking for a Go way to extract all consts from a package. This can be at runtime (reflect during startup) or at build time (go generate ...magic...).
My intended usage is to get a slice containing the names of all Actions from package permissions. They are all consts that end in "Action". For motivation: in C I would just list the actions in a separate source file wrapped in a macro ACTION, then include it twice with different definitions of ACTION. It would take 4 lines and they would be readable. SURELY GO CAN DO BETTER!
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Ariel Shaqed (Scolnicov)
03/05/2023, 8:06 AM@Barak Amar would something like this work?
o
Oz Katz
03/05/2023, 8:11 AM
perhaps https://pkg.go.dev/go/ast ?
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a
Ariel Shaqed (Scolnicov)
03/05/2023, 8:12 AMLooking...
Ariel Shaqed (Scolnicov)
03/05/2023, 8:18 AMYeah, it's halfway down the list of packages for understanding Golang types.
b
Barak Amar
03/05/2023, 9:33 AM
Barak Amar
03/05/2023, 9:33 AM
Using code parse ^
Barak Amar
03/05/2023, 9:34 AM
Had to set a type so it will be easy to pull the relevant ones.
Based on other code I found.
Barak Amar
03/05/2023, 9:35 AM
But I would consider to just have a slice that contains all of the values and not to reflect if possible
Barak Amar
03/05/2023, 9:36 AM
or validation func that will include a big switch case with true for all the right ones
Barak Amar
03/05/2023, 9:37 AM
Our code today just validate format - but possible values
a
Ariel Shaqed (Scolnicov)
03/05/2023, 9:41 AMYeah. it's not reflection 🙂 Thing is: how do I get a FileSet after the program has already been built?
Anyway, I reckon I'll
go generate//go:generate go run ./cmd/tools/extract_xyzzyb
Barak Amar
03/05/2023, 9:42 AM
The above code needs the source like in go generate. So I think we both use the same technic.
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Ariel Shaqed (Scolnicov)
03/05/2023, 2:17 PMEnded up using your stuff in a
go generate🤘 1
Ariel Shaqed (Scolnicov)
03/07/2023, 11:55 AMWorks :-) Happy for reviews...
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