dokuwiki: Combine mechanism for plugins and templates

Copy templates and plugins into Dokuwiki instead of linking to address
template compatibility. As noted by @sinavir[^1], (some) templates would
fail due to relative PHP imports.

[^1]: https://github.com/NixOS/nixpkgs/pull/208299#issuecomment-1370413116

nixos/modules/services/web-apps/dokuwiki.nix

@@ -73,28 +73,16 @@ let
     ${if isString pc then pc else pc_gen pc}
   '';
 
-  pkg = hostName: cfg: pkgs.stdenv.mkDerivation rec {
-    pname = "dokuwiki-${hostName}";
-    version = src.version;
-    src = cfg.package;
 
-    installPhase = ''
-      mkdir -p $out
-      cp -r * $out/
+  pkg = hostName: cfg: cfg.package.combine {
+    inherit (cfg) plugins templates;
 
-      # symlink the dokuwiki config
-      ln -sf ${dokuwikiLocalConfig hostName cfg} $out/share/dokuwiki/conf/local.php
+    pname = p: "${p.pname}-${hostName}";
 
-      # symlink plugins config
-      ln -sf ${dokuwikiPluginsLocalConfig hostName cfg} $out/share/dokuwiki/conf/plugins.local.php
-
-      # symlink acl (if needed)
-      ${optionalString (cfg.mergedConfig.useacl && cfg.acl != null) "ln -sf ${dokuwikiAclAuthConfig hostName cfg} $out/share/dokuwiki/acl.auth.php"}
-
-      # symlink additional plugin(s) and templates(s)
-      ${concatMapStringsSep "\n" (template: "ln -sf ${template} $out/share/dokuwiki/lib/tpl/${template.name}") cfg.templates}
-      ${concatMapStringsSep "\n" (plugin: "ln -sf ${plugin} $out/share/dokuwiki/lib/plugins/${plugin.name}") cfg.plugins}
-    '';
+    basePackage = cfg.package;
+    localConfig = dokuwikiLocalConfig hostName cfg;
+    pluginsConfig = dokuwikiPluginsLocalConfig hostName cfg;
+    aclConfig = if cfg.aclUse && cfg.acl != null then dokuwikiAclAuthConfig hostName cfg else null;
   };
 
   aclOpts = { ... }: {

nixos/tests/dokuwiki.nix

@@ -142,6 +142,14 @@ in {
               "curl -sSfL 'http://site2.local/doku.php?id=plugin-list' | (! grep 'plugin:tag')",
           )
 
+          # Test if theme is applied and working correctly (no weired relative PHP import errors)
+          machine.succeed(
+            "curl -sSfL 'http://site1.local/doku.php' | grep 'bootstrap3/images/logo.png'",
+            "curl -sSfL 'http://site1.local/lib/exe/css.php' | grep 'bootstrap3'",
+            "curl -sSfL 'http://site1.local/lib/tpl/bootstrap3/css.php'",
+          )
+
+
         # Just to ensure both Webserver configurations are consistent in allowing that
         with subtest("Rewriting"):
           machine.succeed(

pkgs/servers/web-apps/dokuwiki/default.nix

@@ -1,4 +1,10 @@
-{ lib, stdenv, fetchFromGitHub, writeText, nixosTests }:
+{ lib
+, stdenv
+, fetchFromGitHub
+, writeText
+, nixosTests
+, dokuwiki
+}:
 
 stdenv.mkDerivation rec {
   pname = "dokuwiki";
@@ -38,15 +44,41 @@ stdenv.mkDerivation rec {
   '';
 
   installPhase = ''
+    runHook preInstall
+
     mkdir -p $out/share/dokuwiki
     cp -r * $out/share/dokuwiki
     cp ${preload} $out/share/dokuwiki/inc/preload.php
     cp ${phpLocalConfig} $out/share/dokuwiki/conf/local.php
     cp ${phpPluginsLocalConfig} $out/share/dokuwiki/conf/plugins.local.php
+
+    runHook postInstall
   '';
 
-  passthru.tests = {
-    inherit (nixosTests) dokuwiki;
+  passthru = {
+    combine = { basePackage ? dokuwiki
+      , plugins ? []
+      , templates ? []
+      , localConfig ? null
+      , pluginsConfig ? null
+      , aclConfig ? null
+      , pname ? (p: "${p.pname}-combined")
+    }: let
+      isNotEmpty = x: lib.optionalString (! builtins.elem x [ null "" ]);
+    in basePackage.overrideAttrs (prev: {
+      pname = if builtins.isFunction pname then pname prev else pname;
+
+      postInstall = prev.postInstall or "" + ''
+        ${lib.concatMapStringsSep "\n" (tpl: "cp -r ${toString tpl} $out/share/dokuwiki/lib/tpl/${tpl.name}") templates}
+        ${lib.concatMapStringsSep "\n" (plugin: "cp -r ${toString plugin} $out/share/dokuwiki/lib/plugins/${plugin.name}") plugins}
+        ${isNotEmpty localConfig "ln -sf ${localConfig} $out/share/dokuwiki/conf/local.php" }
+        ${isNotEmpty pluginsConfig "ln -sf ${pluginsConfig} $out/share/dokuwiki/conf/plugins.local.php" }
+        ${isNotEmpty aclConfig "ln -sf ${aclConfig} $out/share/dokuwiki/acl.auth.php" }
+      '';
+    });
+    tests = {
+      inherit (nixosTests) dokuwiki;
+    };
   };
 
   meta = with lib; {