nix: move to weasypdf from wkhtmltopdf

Closes #1873

nix/checks/solr.nix

@@ -6,8 +6,6 @@
   nixpkgs.config = {
     permittedInsecurePackages = [
       "solr-8.6.3"
-      # NOTE: Qtwebkit is a dep for wkhtmltopdf, this line is needed until #201765 is fixed in nixpkgs
-      "qtwebkit-5.212.0-alpha4"
     ];
   };
 

nix/dev-vm/default.nix

@@ -16,7 +16,7 @@
   };
 
   # Otherwise oomkiller kills docspell
-  virtualisation.memorySize = 2048;
+  virtualisation.memorySize = 4096;
 
   virtualisation.forwardPorts = [
     # SSH

nix/modules/joex.nix

@@ -178,8 +178,24 @@ let
 
       wkhtmlpdf = {
         command = {
-          program = "${pkgs.wkhtmltopdf}/bin/wkhtmltopdf";
+          program = "";
-          args = [ "-s" "A4" "--encoding" "UTF-8" "-" "{{outfile}}" ];
+          args = [ "--encoding" "UTF-8" "-" "{{outfile}}" ];
+          timeout = "2 minutes";
+        };
+        working-dir = "/tmp/docspell-convert";
+      };
+
+      weasyprint = {
+        command = {
+          program = "${pkgs.python310Packages.weasyprint}/bin/weasyprint";
+          args = [
+            "--optimize-size"
+            "all"
+            "--encoding"
+            "{{encoding}}"
+            "-"
+            "{{outfile}}"
+          ];
           timeout = "2 minutes";
         };
         working-dir = "/tmp/docspell-convert";
@@ -1207,6 +1223,11 @@ in
                 converted to a PDF file.
               '';
             };
+            html-converter = mkOption {
+              type = types.enum [ "wkhtmlpdf" "weasyprint" ];
+              default = "weasyprint";
+              description = "Which tool to use for converting html to pdfs";
+            };
             wkhtmlpdf = mkOption {
               type = types.submodule ({
                 options = {
@@ -1246,6 +1267,45 @@ in
                 wkhtmltopdf is used.
               '';
             };
+            weasyprint = mkOption {
+              type = types.submodule ({
+                options = {
+                  working-dir = mkOption {
+                    type = types.str;
+                    default = defaults.convert.weasyprint.working-dir;
+                    description = "Directory where the conversion processes can put their temp files";
+                  };
+                  command = mkOption {
+                    type = types.submodule ({
+                      options = {
+                        program = mkOption {
+                          type = types.str;
+                          default = defaults.convert.weasyprint.command.program;
+                          description = "The path to the executable.";
+                        };
+                        args = mkOption {
+                          type = types.listOf types.str;
+                          default = defaults.convert.weasyprint.command.args;
+                          description = "The arguments to the program";
+                        };
+                        timeout = mkOption {
+                          type = types.str;
+                          default = defaults.convert.weasyprint.command.timeout;
+                          description = "The timeout when executing the command";
+                        };
+                      };
+                    });
+                    default = defaults.convert.weasyprint.command;
+                    description = "The system command";
+                  };
+                };
+              });
+              default = defaults.convert.weasyprint;
+              description = ''
+                To convert HTML files into PDF files, the external tool
+                weasyprint is used.
+              '';
+            };
             tesseract = mkOption {
               type = types.submodule ({
                 options = {