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system-info: Record more environment variables

Simon McVittie requested to merge wip/save-the-environment into master

  • tests: Don't look at the real environment for driver_environment()

    If one of the variables we are interested in happens to be set already, and doesn't get overridden, then the test will fail. For example, DRI_PRIME=1 meson test -C _build would fail.

    This will become a lot more likely to happen when I start logging ubiquitous environment variables like DISPLAY.

    We can't just set envp = NULL initially, because g_environ_setenv() in Ubuntu 12.04 won't accept NULL as a valid environment block (although newer versions do).

  • system-info: Record environment variables that influence SDL, Wine, Steam

    Inspired by https://github.com/ValveSoftware/steam-runtime/issues/357 which turned out to be a distro patch from a version of Slackware that didn't support PulseAudio, forcing SDL to use ALSA even though the user had upgraded to a version of Slackware that does support PulseAudio.

    Various environment variables set by the Steam package on Flathub are also included.

  • system-info: Record environment variables that influence PulseAudio

Edited by Simon McVittie

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