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* show git hash with --versionEgor Tensin2023-06-30
| | | | Also, use cmake's configure_file to build string constants in.
* use signalfd to stop on SIGTERMEgor Tensin2023-06-13
| | | | | | | | | | | | | | | | | | Is this an overkill? I don't know. The thing is, correctly intercepting SIGTERM (also SIGINT, etc.) is incredibly tricky. For example, before this commit, my I/O loops in server.c and worker.c were inherently racy. This was immediately obvious if you tried to run the tests. The tests (especially the Valgrind flavour) would run a worker, wait until it prints a "Waiting for a new command" line, and try to kill it using SIGTERM. The problem is, the global_stop_flag check could have already been executed by the worker, and it would hang forever in recv(). The solution seems to be to use signalfd and select()/poll(). I've never used either before, but it seems to work well enough - at least the very same tests pass and don't hang now.
* rework server-worker communicationEgor Tensin2023-05-15
| | | | | | | | | | | | | | | | | | OK, this is a major rework. * tcp_server: connection threads are not detached anymore, the caller has to clean them up. This was done so that the server can clean up the threads cleanly. * run_queue: simple refactoring, run_queue_entry is called just run now. * server: worker threads are now killed when a run is assigned to a worker. * worker: the connection to server is no longer persistent. A worker sends "new-worker", waits for a task, closes the connection, and when it's done, sends the "complete" message and waits for a new task. This is supposed to improve resilience, since the worker-server connections don't have to be maintained while the worker is doing a CI run.
* fix unnecessary #include-sEgor Tensin2023-05-13
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* make struct worker opaqueEgor Tensin2023-04-29
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* add copyright noticesEgor Tensin2022-12-02
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* add some more codeEgor Tensin2022-08-26
This adds a basic "worker" program. You can now do something like ./server & ./worker & ./client ci_run URL REV and the server should pass a message to worker, after which it should clone the repository at URL, checkout REV, and try to run the CI script. It's extremely unfinished: I need to sort out the graceful shutdown, how the server manages workers, etc.