import attrset via runCommand

aksiksi · Nov 8, 2023 · 4e6ac64 · 4e6ac64
1 parent f681ae3
commit 4e6ac64
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Showing 6 changed files with 34 additions and 27 deletions.
diff --git a/flake.nix b/flake.nix
@@ -42,9 +42,13 @@
       in {
         options.compose2nix = {
           # https://nixos.org/manual/nixos/stable/#sec-option-declarations
+          enable = mkOption {
+            type = types.bool;
+            default = false;
+            description = lib.mdDoc "Enable compose2nix.";
+          };
           paths = mkOption {
             type = types.listOf types.path;
-            default = [];
             description = lib.mdDoc "One or more paths to Docker Compose files.";
           };
           runtime = mkOption {
@@ -87,27 +91,40 @@
             default = true;
             description = lib.mdDoc "Auto-start all containers.";
           };
+          output = mkOption {
+            type = types.anything;
+            description = lib.mdDoc "Output config.";
+          };
         };
-        config.compose2nix = mkIf (cfg.paths != []) {
-          # runCommandLocal ensures that we always build this derivation on the local machine.
-          # This allows us to circumvent the Nix binary cache and minimize the time spent outside
-          # of building the derivation.
-          # https://nixos.org/manual/nixpkgs/stable/#trivial-builder-runCommandLocal
-          output = pkgs.runCommandLocal "run-compose2nix" {
-            env = cfg.env;
+        # runCommandLocal ensures that we always build this derivation on the local machine.
+        # This allows us to circumvent the Nix binary cache and minimize the time spent outside
+        # of building the derivation.
+        # https://nixos.org/manual/nixpkgs/stable/#trivial-builder-runCommandLocal
+        config = let
+          env = cfg.env;
+          paths = cfg.paths;
+          runtime = cfg.runtime;
+          project = cfg.project;
+          projectSeparator = cfg.projectSeparator;
+          envFilesOnly = cfg.envFilesOnly;
+          serviceInclude = cfg.serviceInclude;
+          autoStart = cfg.autoStart;
+        in {
+          config.compose2nix.output = mkIf (paths != []) import (pkgs.runCommandLocal "compose2nix" {
+            env = env;
             buildInputs = [ pkgs.compose2nix ];
           } ''
             ${pkgs.compose2nix}/bin/compose2nix \
-              -paths='${concatStringsSep "," cfg.paths}' \
-              -runtime=${cfg.runtime} \
-              -project=${cfg.project} \
-              -project_separator='${cfg.projectSeparator}' \
-              -env_files='${concatStringsSep "," cfg.envFiles}' \
-              -env_files_only=${cfg.envFilesOnly} \
-              -service_include='${cfg.serviceInclude}' \
-              -auto_start=${cfg.autoStart} \
+              -paths='${concatStringsSep "," paths}' \
+              -runtime=${runtime} \
+              -project=${project} \
+              -project_separator='${projectSeparator}' \
+              -env_files='${concatStringsSep "," envFiles}' \
+              -env_files_only=${envFilesOnly} \
+              -service_include='${serviceInclude}' \
+              -auto_start=${autoStart} \
               -output=$out
-          '';
+        '');
         };
       };
     });

diff --git a/templates/main.nix.tmpl b/templates/main.nix.tmpl
@@ -1,6 +1,4 @@
 {{- $runtime := .Runtime | printf "%s" -}}
-{ pkgs, ... }:
-
 {
   # Runtime
   virtualisation.{{$runtime}} = {

diff --git a/testdata/TestDocker_WithProject_out.nix b/testdata/TestDocker_WithProject_out.nix
@@ -1,5 +1,3 @@
-{ pkgs, ... }:
-
 {
   # Runtime
   virtualisation.docker = {

diff --git a/testdata/TestDocker_out.nix b/testdata/TestDocker_out.nix
@@ -1,5 +1,3 @@
-{ pkgs, ... }:
-
 {
   # Runtime
   virtualisation.docker = {

diff --git a/testdata/TestPodman_WithProject_out.nix b/testdata/TestPodman_WithProject_out.nix
@@ -1,5 +1,3 @@
-{ pkgs, ... }:
-
 {
   # Runtime
   virtualisation.podman = {

diff --git a/testdata/TestPodman_out.nix b/testdata/TestPodman_out.nix
@@ -1,5 +1,3 @@
-{ pkgs, ... }:
-
 {
   # Runtime
   virtualisation.podman = {