plugins/lsp/jsonnet-ls: init

plugins/lsp/language-servers/default.nix

@@ -248,6 +248,13 @@ let
       ];
       settings = cfg: { json = cfg; };
     }
+    {
+      name = "jsonnet-ls";
+      description = "jsonnet language server";
+      package = pkgs.jsonnet-language-server;
+      serverName = "jsonnet_ls";
+      settingsOptions = import ./jsonnet-ls-settings.nix { inherit lib helpers; };
+    }
     {
       name = "julials";
       description = "julials for Julia";

plugins/lsp/language-servers/jsonnet-ls-settings.nix

@@ -0,0 +1,77 @@
+{ lib, helpers }:
+# Options:
+#  - https://github.com/grafana/jsonnet-language-server/tree/main/editor/vim
+#  - https://github.com/grafana/jsonnet-language-server/blob/main/pkg/server/configuration.go
+#  - https://github.com/google/go-jsonnet/blob/master/internal/formatter/jsonnetfmt.go#L55
+with lib;
+{
+  ext_vars = helpers.defaultNullOpts.mkAttrsOf types.str { } ''
+    External variables.
+  '';
+
+  formatting = {
+    Indent = helpers.defaultNullOpts.mkUnsignedInt 2 ''
+      The number of spaces for each level of indenation.
+    '';
+
+    MaxBlankLines = helpers.defaultNullOpts.mkUnsignedInt 2 ''
+      Max allowed number of consecutive blank lines.
+    '';
+
+    StringStyle =
+      helpers.defaultNullOpts.mkEnum
+        [
+          "double"
+          "single"
+          "leave"
+        ]
+        "single"
+        ''
+          Whether strings should use double quotes `"`, single quotes `'`, or be left as-is.
+        '';
+
+    CommentStyle =
+      helpers.defaultNullOpts.mkEnum
+        [
+          "hash"
+          "slash"
+          "leave"
+        ]
+        "slash"
+        ''
+          Whether comments should use hash `#`, slash `//`, or be left as-is.
+        '';
+
+    PrettyFieldNames = helpers.defaultNullOpts.mkBool true ''
+      Causes fields to only be wrapped in `'''` when needed.
+    '';
+
+    PadArrays = helpers.defaultNullOpts.mkBool false ''
+      Causes arrays to be written like `[ this ]` instead of `[this]`.
+    '';
+
+    PadObjects = helpers.defaultNullOpts.mkBool true ''
+      Causes objects to be written like `{ this }` instead of `{this}`.
+    '';
+
+    SortImports = helpers.defaultNullOpts.mkBool true ''
+      Causes imports at the top of the file to be sorted in groups by filename.
+    '';
+
+    UseImplicitPlus = helpers.defaultNullOpts.mkBool true ''
+      Removes plus sign where it is not required.
+    '';
+
+    StripEverything = helpers.defaultNullOpts.mkBool false ''
+      Removes all comments and newlines.
+    '';
+
+    StripComments = helpers.defaultNullOpts.mkBool false ''
+      Removes all comments.
+    '';
+
+    StripAllButComments = helpers.defaultNullOpts.mkBool false ''
+      Removes everything, other than comments.
+    '';
+  };
+}

tests/test-sources/plugins/lsp/_lsp.nix

@@ -143,6 +143,7 @@
             htmx.enable = true;
             java-language-server.enable = true;
             jsonls.enable = true;
+            jsonnet-ls.enable = true;
             julials.enable = true;
             kotlin-language-server.enable = true;
             leanls.enable = true;

tests/test-sources/plugins/lsp/language-servers/jsonnet.nix

@@ -0,0 +1,25 @@
+{
+  example = {
+    plugins.lsp = {
+      enable = true;
+
+      servers.jsonnet-ls = {
+        enable = true;
+
+        settings = {
+          Indent = 4;
+          MaxBlankLines = 10;
+          StringStyle = "single";
+          CommentStyle = "leave";
+          PrettyFieldNames = true;
+          PadArrays = false;
+          PadObjects = true;
+          SortImports = false;
+          UseImplicitPlus = true;
+          StripEverything = false;
+          StripComments = false;
+        };
+      };
+    };
+  };
+}