Re: [Nix-dev] Depending on a service from inside an expression?
Hi Mateusz, Mateusz Kowalczyk writes: > There is a project that as part of its tests has to create a postgresql > database which means that the postgres server needs to be running. > > Is there an easy way to achieve this? How does one go about testing such > packages to begin with? I am currently setting something like that (hydra tests) for a nix module (a systemd service) which requires postgresql. What works for me: 1) a nix package file for your program (say foo) so that your program compiles and installs 2) a nix env file (say fooEnv) for runtime-only dependencies (not detected by nix) which will be deployed as part of the service (because there is a limit on the PATH variable length) 3) a nix module file which defines the systemd service. I have two modules: - foo-init which takes a long time to set up the database and other things - foo-service which is the actual service running the foo program 4) a nix vm file which defines a VM with that module plus postgresql module. This is also useful for manually testing the VM. 5) a nix vmtest file which imports nixpkgs/nixos/tests/make-test.nix, creates the VM and runs the testScript If your program doesn't run as a service, you would not need 3) I guess. nixpkgs/nixos/tests/make-test.nix runs the tests in a fresh qemu machine which is then discarded. Cheers, Tomas ___ nix-dev mailing list nix-dev@lists.science.uu.nl http://lists.science.uu.nl/mailman/listinfo/nix-dev
Re: [Nix-dev] Depending on a service from inside an expression?
It's possible to run postgres with just a unix domain socket for communication, and no network access. Then, you can point your tests at that self-contained postgres environment. Would that work for your situation? On Mon, Apr 27, 2015 at 8:52 PM, Mateusz Kowalczyk wrote: > Hi, > > There is a project that as part of its tests has to create a postgresql > database which means that the postgres server needs to be running. > > Is there an easy way to achieve this? How does one go about testing such > packages to begin with? > > -- > Mateusz K. > ___ > nix-dev mailing list > nix-dev@lists.science.uu.nl > http://lists.science.uu.nl/mailman/listinfo/nix-dev > ___ nix-dev mailing list nix-dev@lists.science.uu.nl http://lists.science.uu.nl/mailman/listinfo/nix-dev
[Nix-dev] Depending on a service from inside an expression?
Hi, There is a project that as part of its tests has to create a postgresql database which means that the postgres server needs to be running. Is there an easy way to achieve this? How does one go about testing such packages to begin with? -- Mateusz K. ___ nix-dev mailing list nix-dev@lists.science.uu.nl http://lists.science.uu.nl/mailman/listinfo/nix-dev
