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Lock paths can become too long when remote builders are involved #157

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opened 2024-03-19 02:11:27 +00:00 by lunaphied · 5 comments
lunaphied commented 2024-03-19 02:11:27 +00:00
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Running installChecks on https://gerrit.lix.systems/plugins/gitiles/lix/+/dea029ff5141870bed84d4b578f3683280654d7d causes an error due to using the ridiculously long lockfile path of:

/build/nix-shell.CAf3tZ/nix-test/build-remote-trustless-should-pass-3/local/nix/var/nix/current-load/ssh-ng:__localhost?remote-program=_home_lunaphied_code_lix_.w_maint_backport_flake-lock-ux_tests_functional_nix-daemon-untrusting.sh&remote-store=_build_nix-shell.CAf3tZ_nix-test_build-remote-trustless-should-pass-3_remote%3Fsystem-features=foo%20bar%20baz-0

This should likely be replaced by a hash instead so that the name cannot become absurdly long.

Running `installChecks` on https://gerrit.lix.systems/plugins/gitiles/lix/+/dea029ff5141870bed84d4b578f3683280654d7d causes an error due to using the ridiculously long lockfile path of: ``` /build/nix-shell.CAf3tZ/nix-test/build-remote-trustless-should-pass-3/local/nix/var/nix/current-load/ssh-ng:__localhost?remote-program=_home_lunaphied_code_lix_.w_maint_backport_flake-lock-ux_tests_functional_nix-daemon-untrusting.sh&remote-store=_build_nix-shell.CAf3tZ_nix-test_build-remote-trustless-should-pass-3_remote%3Fsystem-features=foo%20bar%20baz-0 ``` This should likely be replaced by a hash instead so that the name cannot become absurdly long.
installCheck.log
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qyriad commented 2024-04-03 23:00:56 +00:00
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Why does the entire remote builder configuration get encoded into a lockfile path in the first place??

Why does the entire remote builder configuration get encoded into a lockfile path in the first place??
lunaphied commented 2024-04-04 01:21:14 +00:00
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See https://git.lix.systems/lix-project/lix/src/branch/main/src/build-remote/build-remote.cc#L40 and https://git.lix.systems/lix-project/lix/src/branch/main/src/build-remote/build-remote.cc#L266

See https://git.lix.systems/lix-project/lix/src/branch/main/src/build-remote/build-remote.cc#L40 and https://git.lix.systems/lix-project/lix/src/branch/main/src/build-remote/build-remote.cc#L266
jade commented 2024-04-04 04:09:08 +00:00
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O_o

simply sha256 the normalized url and take some prefix or so

O_o simply sha256 the normalized url and take some prefix or so
lunaphied commented 2024-04-08 23:04:41 +00:00
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From Nixpkgs' definition of the Nix package:

  # socket path becomes too long otherwise
  preInstallCheck = lib.optionalString stdenv.isDarwin ''
    export TMPDIR=$NIX_BUILD_TOP
  ''

Wonder if this is relevant.

From Nixpkgs' definition of the Nix package: ```nix # socket path becomes too long otherwise preInstallCheck = lib.optionalString stdenv.isDarwin '' export TMPDIR=$NIX_BUILD_TOP '' ``` Wonder if this is relevant.
jade commented 2024-04-08 23:40:51 +00:00
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honestly we should just fix this in a generalized manner by hashing the path though (maybe minus one component? maybe print out the full name so you can find which process was doing it? just to not regress the ability to find who is holding a lock)

honestly we should just fix this in a generalized manner by hashing the path though (maybe minus one component? maybe print out the full name so you can find which process was doing it? just to not regress the ability to find who is holding a lock)
lunaphied was assigned by qyriad 2024-05-12 19:22:44 +00:00
lunaphied was unassigned by jade 2024-05-25 03:55:08 +00:00
jade self-assigned this 2024-05-25 03:55:12 +00:00
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