changes configure_file input rebuilt the buildir like meson setup build --reconfigure

[aullidolunar]

Basically:

blp_file = configure_file(
	input: data_sources.get(0), # builder.blp.in
	output: data_files.get(0).substring(0, -3), # builder.blp
	configuration: {
		'PROGRAM_NAME': PROGRAM_NAME,
		'PROGRAM_TITLE': PROGRAM_TITLE
	}
)

Any changes in builder.blp.in causes meson to reconfigure all over, any ideas about how to only update the configure_file similar when you make changes in sources files to compile only the sources changed?

[eli-schwartz]

This happens because configure_file itself runs at configure time, whereas a custom_target runs at build time. Usually, configured files tend to be files that very rarely change.

It's possible to instead use a custom_target() where the command is something like sed. Or perhaps a custom python script that performs the necessary replacements. You'd pass PROGRAM+NAME and PROGRAM_TITLE as arguments to your sed/python script.

[aullidolunar]

Thanks for the input.