Compute the whole closure of to-be-executed generators upfront before executing anything
Properly compute closures for the 4 different scenarios:
1. full_closure: run all generators for a selected machine in topological order
2. all_missing_closure: run just the missing generators including their dependents
3. requested_closure: run only a selected list of generators including their missing dependencies and their dependents
4. minimal_closure: Run just enough to ensure that the list of selected generators are in a consistent state. Don't execute anything if nothing is missing.
Many dependencies of clan-cli are currently dynamically loaded via nix-shell on each execution.
This is nice, as it reduces the initial closure size of clan, but the overhead introduced by nix-shell piles up quickly, as some commands shell out many times during their lifetime. For example, when adding a secret git is called 10+ times.
This reduces the time of a test which adds a secret from around 50 seconds to 15 seconds.
- add run_cmd() as an alternative to nix_shell()
- introduce the concept of static dependencies which do not need to go through nix-shell
- static dependencies are defined at build time and included into the wrapper for clan-cli
- add package: clan-cli-full which statically ships all required dependencies
TODO: deprecate nix_shell() in favor of run_cmd()
