Add support for Pkl

.gitmodules

@@ -737,6 +737,9 @@
 [submodule "vendor/grammars/language-pcb"]
 	path = vendor/grammars/language-pcb
 	url = https://github.com/Alhadis/language-pcb
+[submodule "vendor/grammars/language-pkl"]
+	path = vendor/grammars/language-pkl
+	url = https://github.com/nishtahir/language-pkl.git
 [submodule "vendor/grammars/language-povray"]
 	path = vendor/grammars/language-povray
 	url = https://github.com/c-lipka/language-povray
@@ -1353,3 +1356,6 @@
 [submodule "vendor/grammars/zephir-sublime"]
 	path = vendor/grammars/zephir-sublime
 	url = https://github.com/phalcon/zephir-sublime
+[submodule "vendor/grammars/language-pkl"]
+	path = vendor/grammars/language-pkl
+	url = https://github.com/nishtahir/language-pkl.git

grammars.yml

@@ -702,6 +702,8 @@ vendor/grammars/language-pcb:
 - source.pcb.board
 - source.pcb.schematic
 - source.pcb.sexp
+vendor/grammars/language-pkl:
+- source.pkl
 vendor/grammars/language-povray:
 - source.pov-ray sdl
 vendor/grammars/language-property-list:

lib/linguist/heuristics.yml

@@ -516,6 +516,11 @@ disambiguations:
     pattern: '<\?hh'
   - language: PHP
     pattern: '<\?[^h]'
+- extensions: ['.pkl']
+  rules:
+  - language: Pkl
+    pattern: 'new|class|function|import|module|(\w+\s*({|=))'
+  - language: Pickle
 - extensions: ['.pl']
   rules:
   - language: Prolog

lib/linguist/languages.yml

@@ -5240,6 +5240,16 @@ Pike:
   tm_scope: source.pike
   ace_mode: text
   language_id: 287
+Pkl:
+  type: programming
+  color: "#6b9543"
+  extensions:
+  - ".pkl"
+  interpreters:
+  - pkl
+  tm_scope: source.pkl
+  ace_mode: text
+  language_id: 502403550
 PlantUML:
   type: data
   color: "#fbbd16"

samples/Pkl/app-config.pkl

@@ -0,0 +1,38 @@
+// ===----------------------------------------------------------------------===//
+// Copyright © 2024 Apple Inc. and the Pkl project authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//	https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// ===----------------------------------------------------------------------===//
+// This sample is taken from https://github.com/apple/pkl-go-examples and showcases
+// the use of PKL for configuration of a Go app, see the original repository for
+// more information
+
+/// Application configuration for the Pkl Go Example application.
+///
+/// See generated sources in the gen/ directory.
+@go.Package { name = "github.com/apple/pkl-go-examples/gen/appconfig" }
+module org.pkl.golang.example.AppConfig
+
+import "package://pkg.pkl-lang.org/pkl-go/pkl.golang@0.5.0#/go.pkl"
+import "RedisConfig.pkl"
+
+typealias Port = UInt16(this > 0)
+
+/// The host to listen on
+host: String = "127.0.0.1"
+
+/// The application port to listen on
+port: Port = 5051
+
+/// Redis settings for this application
+redis: RedisConfig

samples/Pkl/frontend.pkl

@@ -0,0 +1,101 @@
+//===----------------------------------------------------------------------===//
+// Copyright © 2024 Apple Inc. and the Pkl project authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//===----------------------------------------------------------------------===//
+// This sample is taken from https://github.com/apple/pkl-k8s-examples and showcases
+// the use of PKL to generate YAML manifests for K8s, see the original repository for
+// additional information
+
+import "@k8s/K8sResource.pkl"
+import "@k8s/api/apps/v1/Deployment.pkl"
+import "@k8s/api/core/v1/Service.pkl"
+
+resources: Listing<K8sResource> = new {
+  new Service {
+    metadata {
+      name = "frontend"
+      labels {
+        ["app"] = "guestbook"
+        ["tier"] = "frontend"
+      }
+    }
+    spec {
+      type = "NodePort"
+      ports {
+        new {
+          port = 80
+        }
+      }
+      selector {
+        ["app"] = "guestbook"
+        ["tier"] = "frontend"
+      }
+    }
+  }
+
+  new Deployment {
+    metadata {
+      name = "frontend"
+    }
+    spec {
+      selector {
+        matchLabels {
+          ["app"] = "guestbook"
+          ["tier"] = "frontend"
+        }
+      }
+      replicas = 3
+      template {
+        metadata {
+          labels {
+            ["app"] = "guestbook"
+            ["tier"] = "frontend"
+          }
+        }
+        spec {
+          containers {
+            new {
+              name = "php-redis"
+              image = "gcr.io/google-samples/gb-frontend:v4"
+              resources {
+                requests {
+                  ["cpu"] = "100m"
+                  ["memory"] = "100Mi"
+                }
+              }
+              env {
+                new {
+                  name = "GET_HOSTS_FROM"
+                  value = "dns"
+                }
+              }
+              ports {
+                new {
+                  containerPort = 80
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+}
+
+output {
+  value = resources
+  renderer = (K8sResource.output.renderer as YamlRenderer) {
+    isStream = true
+  }
+}

vendor/README.md

@@ -418,6 +418,7 @@ This is a list of grammars that Linguist selects to provide syntax highlighting
 - **PicoLisp:** [textmate/lisp.tmbundle](https://github.com/textmate/lisp.tmbundle)
 - **PigLatin:** [goblindegook/sublime-text-pig-latin](https://github.com/goblindegook/sublime-text-pig-latin)
 - **Pike:** [hww3/pike-textmate](https://github.com/hww3/pike-textmate)
+- **Pkl:** [nishtahir/language-pkl](https://github.com/nishtahir/language-pkl)
 - **PlantUML:** [qjebbs/vscode-plantuml](https://github.com/qjebbs/vscode-plantuml)
 - **Pod 6:** [perl6/atom-language-perl6](https://github.com/perl6/atom-language-perl6)
 - **PogoScript:** [featurist/PogoScript.tmbundle](https://github.com/featurist/PogoScript.tmbundle)