The current agreed order of importance is as follows: .igtrc < ENV < --switch or to put it in words .igtrc option is less important than ENV .igtrc and ENV are both less important than --switch Real world example: https://patchwork.freedesktop.org/series/63553/ device for IGT execution can be specified as Common::Device in .igtrc, IGT_DEVICE env variable or --device switch on command line. The idea is that .igtrc is the default set on the machine that can be overwritten for the whole session with env or just for a single test with --device. This needs to be documented and the whey we handle this in igt_core.c could use some streamlining.
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