Commit graph

8 commits

Author SHA1 Message Date
rnhmjoj 61b7cab481
treewide: use perl.withPackages when possible
Since 03eaa48 added perl.withPackages, there is a canonical way to
create a perl interpreter from a list of libraries, for use in script
shebangs or generic build inputs. This method is declarative (what we
are doing is clear), produces short shebangs[1] and needs not to wrap
existing scripts.

Unfortunately there are a few exceptions that I've found:

  1. Scripts that are calling perl with the -T switch. This makes perl
  ignore PERL5LIB, which is what perl.withPackages is using to inform
  the interpreter of the library paths.

  2. Perl packages that depends on libraries in their own path. This
  is not possible because perl.withPackages works at build time. The
  workaround is to add `-I $out/${perl.libPrefix}` to the shebang.

In all other cases I propose to switch to perl.withPackages.

[1]: https://lwn.net/Articles/779997/
2021-03-31 21:35:37 +02:00
Michael Raskin 9486375887 nixos/service-runner: fix evaluation
Follow-up to: nixos/systemd: allow preStart with other ExecStartPre cmdlines #109976

As the additional ExecStartPre and ExecStartPost are now lists, update
their processing by service-runner.nix
2021-02-05 13:02:56 +01:00
Robert Hensing 43521ac965 nixos/service-runner.nix: Allow quotes in commands + test 2020-02-28 14:26:29 +01:00
danbst 27982b408e types.optionSet: deprecate and remove last usages 2019-01-31 00:41:10 +02:00
volth bb9557eb7c lib.makePerlPath -> perlPackages.makePerlPath 2018-12-15 03:50:31 +00:00
volth 2e979e8ceb [bot] nixos/*: remove unused arguments in lambdas 2018-07-20 20:56:59 +00:00
Eelco Dolstra 29027fd1e1 Rewrite ‘with pkgs.lib’ -> ‘with lib’
Using pkgs.lib on the spine of module evaluation is problematic
because the pkgs argument depends on the result of module
evaluation. To prevent an infinite recursion, pkgs and some of the
modules are evaluated twice, which is inefficient. Using ‘with lib’
prevents this problem.
2014-04-14 16:26:48 +02:00
Eelco Dolstra 2b0aea1793 Allow running NixOS services outside of systemd
The attribute ‘config.systemd.services.<service-name>.runner’
generates a script that runs the service outside of systemd.  This is
useful for testing, and also allows NixOS services to be used outside
of NixOS.  For instance, given a configuration file foo.nix:

  { config, pkgs, ... }:

  { services.postgresql.enable = true;
    services.postgresql.package = pkgs.postgresql92;
    services.postgresql.dataDir = "/tmp/postgres";
  }

you can build and run PostgreSQL as follows:

  $ nix-build -A config.systemd.services.postgresql.runner -I nixos-config=./foo.nix
  $ ./result

This will run the service's ExecStartPre, ExecStart, ExecStartPost and
ExecStopPost commands in an appropriate environment.  It doesn't work
well yet for "forking" services, since it can't track the main
process.  It also doesn't work for services that assume they're always
executed by root.
2013-11-18 18:04:17 +01:00