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Merge pull request #13905 from obsidiansystems/derivation-building-goal-simplify-0

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Derivation building goal simplify -- no `goto`
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John Ericson 2025-09-03 17:34:27 -04:00 • committed by GitHub
commit b69576e2b3
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3 changed files with 272 additions and 260 deletions
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17
src/libstore/unix/include/nix/store/build/hook-instance.hh
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@ -7,6 +7,14 @@
namespace nix {
/**
* @note Sometimes this is owned by the `Worker`, and sometimes it is
* owned by a `Goal`. This is for efficiency: rather than starting the
* hook every time we want to ask whether we can run a remote build
* (which can be very often), we reuse a hook process for answering
* those queries until it accepts a build. So if there are N
* derivations to be built, at most N hooks will be started.
*/
struct HookInstance
{
/**
@ -29,6 +37,15 @@ struct HookInstance
*/
Pid pid;
/**
* The remote machine on which we're building.
*
* @Invariant When the hook instance is owned by the `Worker`, this
* is the empty string. When it is owned by a `Goal`, this should be
* set.
*/
std::string machineName;
FdSink sink;
std::map<ActivityId, Activity> activities;