Update to latest Lix main

flake.lock

@@ -27,11 +27,11 @@
         "pre-commit-hooks": "pre-commit-hooks"
       },
       "locked": {
-        "lastModified": 1718081112,
-        "narHash": "sha256-3cpIVHuyo6yz9n7U/7U/p2Lmwjj1xHdTJR2RkT5JntY=",
+        "lastModified": 1719211568,
+        "narHash": "sha256-oIgmvhe3CV/36LC0KXgqWnKXma39wabks8U9JBMDfO4=",
         "ref": "refs/heads/main",
-        "rev": "8a3d063a494c4b8c767190a5ce3e4075a75f9d07",
-        "revCount": 15756,
+        "rev": "4c3d93611f2848c56ebc69c85f2b1e18001ed3c7",
+        "revCount": 15877,
         "type": "git",
         "url": "https://git@git.lix.systems/lix-project/lix"
       },
@@ -58,16 +58,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1715218190,
-        "narHash": "sha256-R98WOBHkk8wIi103JUVQF3ei3oui4HvoZcz9tYOAwlk=",
+        "lastModified": 1719145550,
+        "narHash": "sha256-K0i/coxxTEl30tgt4oALaylQfxqbotTSNb1/+g+mKMQ=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "9a9960b98418f8c385f52de3b09a63f9c561427a",
+        "rev": "e4509b3a560c87a8d4cb6f9992b8915abf9e36d8",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-23.11",
+        "ref": "nixos-24.05",
         "repo": "nixpkgs",
         "type": "github"
       }

flake.nix

@@ -1,7 +1,7 @@
 {
   description = "A Nix-based continuous build system";
 
-  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11";
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05";
   inputs.nix.url = "git+https://git@git.lix.systems/lix-project/lix";
   inputs.nix.inputs.nixpkgs.follows = "nixpkgs";
 

src/hydra-eval-jobs/hydra-eval-jobs.cc

@@ -349,14 +349,14 @@ int main(int argc, char * * argv)
         /* Start a handler thread per worker process. */
         auto handler = [&]()
         {
-            pid_t pid = -1;
+            Pid pid;
             try {
                 AutoCloseFD from, to;
 
                 while (true) {
 
                     /* Start a new worker process if necessary. */
-                    if (pid == -1) {
+                    if (!pid) {
                         Pipe toPipe, fromPipe;
                         toPipe.create();
                         fromPipe.create();
@@ -383,13 +383,13 @@ int main(int argc, char * * argv)
                             });
                         from = std::move(fromPipe.readSide);
                         to = std::move(toPipe.writeSide);
-                        debug("created worker process %d", pid);
+                        debug("created worker process %d", pid.get());
                     }
 
                     /* Check whether the existing worker process is still there. */
                     auto s = readLine(from.get());
                     if (s == "restart") {
-                        pid = -1;
+                        pid.wait();
                         continue;
                     } else if (s != "next") {
                         auto json = nlohmann::json::parse(s);
@@ -455,7 +455,7 @@ int main(int argc, char * * argv)
                     }
                 }
             } catch (...) {
-                check_pid_status_nonblocking(pid);
+                check_pid_status_nonblocking(pid.release());
                 auto state(state_.lock());
                 state->exc = std::current_exception();
                 wakeup.notify_all();

src/hydra-evaluator/hydra-evaluator.cc

@@ -191,7 +191,7 @@ struct Evaluator
             txn.commit();
         }
 
-        assert(jobset.pid == -1);
+        assert(jobset.pid);
 
         jobset.pid = startProcess([&]() {
             Strings args = { "hydra-eval-jobset", jobset.name.project, jobset.name.jobset };
@@ -206,7 +206,7 @@ struct Evaluator
 
     bool shouldEvaluate(Jobset & jobset)
     {
-        if (jobset.pid != -1) {
+        if (jobset.pid) {
             // Already running.
             debug("shouldEvaluate %s? no: already running",
                   jobset.name.display());
@@ -330,7 +330,7 @@ struct Evaluator
 
             if (state->runningEvals < maxEvals) {
                 for (auto & i : state->jobsets)
-                    if (i.second.pid == -1 &&
+                    if (!i.second.pid &&
                         i.second.checkInterval > 0)
                         sleepTime = std::min(sleepTime, std::chrono::seconds(
                                 std::max((time_t) 1, i.second.lastCheckedTime - now + i.second.checkInterval)));
@@ -407,7 +407,7 @@ struct Evaluator
                 for (auto & i : state->jobsets) {
                     auto & jobset(i.second);
 
-                    if (jobset.pid == pid) {
+                    if (jobset.pid.get() == pid) {
                         printInfo("evaluation of jobset ‘%s’ %s",
                             jobset.name.display(), statusToString(status));
 

src/hydra-queue-runner/build-remote.cc

@@ -531,7 +531,7 @@ void State::buildRemote(ref<Store> destStore,
         {
             auto activeStepState(activeStep->state_.lock());
             if (activeStepState->cancelled) throw Error("step cancelled");
-            activeStepState->pid = child.sshPid;
+            activeStepState->pid = child.sshPid.get();
         }
 
         Finally clearPid([&]() {