devenv devlog: Processes are now tasks
Building on the task runner, devenv now exposes all processes as tasks named devenv:processes:<name>.
Now you can run tasks before or after a process runs - addressing a frequently requested feature for orchestrating the startup sequence.
Usage
Execute setup tasks before the process starts
{
processes.backend = {
exec = "cargo run --release";
};
tasks."db:migrate" = {
exec = "diesel migration run";
before = [ "devenv:processes:backend" ];
};
}
When you run devenv up or the individual process task, migrations run first.
Run cleanup after the process stops
{
processes.app = {
exec = "node server.js";
};
tasks."app:cleanup" = {
exec = ''
rm -f ./server.pid
rm -rf ./tmp/*
'';
after = [ "devenv:processes:app" ];
};
}
Implementation
Under the hood, process-compose now runs processes through devenv-tasks run --mode all devenv:processes:<name> instead of executing them directly. This preserves all existing process functionality while adding task capabilities.
The --mode all flag ensures that both before and after tasks are executed, maintaining the expected lifecycle behavior.
What's next?
Future work on process dependencies (#2037) will also address native health check support (process-compose#371), eliminating the need for manual polling scripts.
Domen