Backport breakpointHook [18.09] #49099
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(cherry picked from commit 84e915a)
Usuage: Add breakpointHook to your `buildInputs` like this:
stdenv.mkDerivation rec {
# ...
buildInputs = [ breakpointHook ];
});
When the build fails as show in this example:
pkgs.hello.overrideAttrs (old: {
buildInputs = [ breakpointHook ];
postPatch = ''
false
'';
});
It will halt execution printing the following message:
build failed in patchPhase with exit code 1
To attach to this build run the following command as root:
cntr attach -t command cntr-/nix/store/ynyb4n82x2r7sldd58pbb405jdqh5f00-hello-2.10
Installing cntr and running the command will provide shell access to the
build sandbox of failed build:
sudo cntr attach -t command cntr-/nix/store/ynyb4n82x2r7sldd58pbb405jdqh5f00-hello-2.10
WARNING: bad ownership on /nix/var/nix/profiles/per-user/root, should be 1000
[nixbld@localhost:/var/lib/cntr]$
At /var/lib/cntr the sandbox filesystem is mounted. All commands and
files of the system are still accessible within the shell.
To execute commands from the sandbox use the `cntr exec` subcommand.
(cherry picked from commit f10b935)
(cherry picked from commit 325a569)
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Success on aarch64-linux (full log) Attempted: breakpointHook The following builds were skipped because they don't evaluate on aarch64-linux: cntr Partial log (click to expand)
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No attempt on x86_64-darwin (full log) The following builds were skipped because they don't evaluate on x86_64-darwin: breakpointHook, cntr Partial log (click to expand)
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Success on x86_64-linux (full log) Attempted: breakpointHook, cntr Partial log (click to expand)
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LnL7
reviewed
Oct 26, 2018
doc/stdenv.xml
Outdated
| This hook will make a build pause instead of stopping | ||
| when a failure happen. It prevents nix to cleanup the build | ||
| environment immediatly and allows the user to attach | ||
| to a build environemnt using the <varname>cntr</varname> command. |
There was a problem hiding this comment.
<command> is probably better suited for this
(cherry picked from commit 7f80fb2)
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Success on aarch64-linux (full log) Attempted: breakpointHook The following builds were skipped because they don't evaluate on aarch64-linux: cntr Partial log (click to expand)
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Success on x86_64-linux (full log) Attempted: breakpointHook, cntr Partial log (click to expand)
|
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No attempt on x86_64-darwin (full log) The following builds were skipped because they don't evaluate on x86_64-darwin: breakpointHook, cntr Partial log (click to expand)
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Motivation for this change
Things done
sandboxinnix.confon non-NixOS)nix-shell -p nox --run "nox-review wip"./result/bin/)nix path-info -Sbefore and after)