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nixos/tests/avahi: Fix running background command #165146

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merged 1 commit into from
Mar 22, 2022

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@aszlig aszlig commented Mar 21, 2022

Description of changes

In #142747, the implementation behind Machine.execute() has been changed to pipe all the command's output into base64 on the guest machine.

Unfortunately this means that base64 is blocking until stdout is closed, which in turn means that we now need to make sure that whenever we run a program in background via & we also need to make sure to close stdout, which we do by redirecting stdout to stderr.

Things done
  • Built on platform(s)
    • x86_64-linux
    • aarch64-linux
    • x86_64-darwin
    • aarch64-darwin
  • For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
  • Tested, as applicable:
  • Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
  • Tested basic functionality of all binary files (usually in ./result/bin/)
  • 22.05 Release Notes (or backporting 21.11 Release notes)
    • (Package updates) Added a release notes entry if the change is major or breaking
    • (Module updates) Added a release notes entry if the change is significant
    • (Module addition) Added a release notes entry if adding a new NixOS module
    • (Release notes changes) Ran nixos/doc/manual/md-to-db.sh to update generated release notes
  • Fits CONTRIBUTING.md.

@github-actions github-actions bot added the 6.topic: nixos Issues or PRs affecting NixOS modules, or package usability issues specific to NixOS label Mar 21, 2022
@ofborg ofborg bot added 10.rebuild-darwin: 0 This PR does not cause any packages to rebuild on Darwin 10.rebuild-linux: 0 This PR does not cause any packages to rebuild on Linux labels Mar 21, 2022
@aszlig
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aszlig commented Mar 22, 2022

@ofborg test avahi

In NixOS#142747, the implementation
behind Machine.execute() has been changed to pipe all the command's
output into base64 on the guest machine.

Unfortunately this means that base64 is blocking until stdout is closed,
which in turn means that we now need to make sure that whenever we run a
program in background via "&" we also need to make sure to close stdout,
which we do by redirecting stdout to stderr.

Signed-off-by: aszlig <[email protected]>
@aszlig aszlig force-pushed the avahi-test-fixup branch from a83e9ed to de4a69b Compare March 22, 2022 16:24
@aszlig aszlig merged commit de4a69b into NixOS:master Mar 22, 2022
@aszlig aszlig deleted the avahi-test-fixup branch March 22, 2022 16:24
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6.topic: nixos Issues or PRs affecting NixOS modules, or package usability issues specific to NixOS 10.rebuild-darwin: 0 This PR does not cause any packages to rebuild on Darwin 10.rebuild-linux: 0 This PR does not cause any packages to rebuild on Linux
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