Fix #103 Add support for --link in COPY instructions

Signed-off-by: Remy Suen <[email protected]>

CHANGELOG.md

@@ -2,6 +2,9 @@
 All notable changes to this project will be documented in this file.
 
 ## [Unreleased]
+### Added
+- add support for validating the `--link` flag in COPY instructions ([#103](https://github.com/rcjsuen/dockerfile-language-service/issues/103)
+
 ### Fixed
 - semantic tokens will no longer have negative values if quoted string content is inside a variable ([#104](https://github.com/rcjsuen/dockerfile-language-service/issues/104))
 

package.json

@@ -21,7 +21,7 @@
   },
   "dependencies": {
     "dockerfile-ast": "0.4.2",
-    "dockerfile-utils": "0.9.4",
+    "dockerfile-utils": "0.10.0",
     "vscode-languageserver-types": "3.17.0-next.3"
   },
   "main": "./lib/main.js",

test/dockerValidate.test.ts

@@ -42,4 +42,10 @@ describe("Docker Validation Tests", () => {
         assert.strictEqual(1, problems.length);
         assertInstructionCasing(problems[0], DiagnosticSeverity.Error);
     });
+
+    it("issue #103", () => {
+        const content = "FROM alpine\nCOPY --link . .";
+        const problems = service.validate(content, { instructionCasing: ValidationSeverity.ERROR });
+        assert.strictEqual(0, problems.length);
+    });
 });