feat: add no-internal

source/rules/no-internal.ts

@@ -0,0 +1,36 @@
+/**
+ * @license Use of this source code is governed by an MIT-style license that
+ * can be found in the LICENSE file at https://github.com/cartant/eslint-plugin-rxjs
+ */
+
+import { Rule } from "eslint";
+import * as es from "estree";
+
+const rule: Rule.RuleModule = {
+  meta: {
+    docs: {
+      category: "RxJS",
+      description: "Disallows the importation of internals.",
+      recommended: true
+    },
+    fixable: null,
+    messages: {
+      forbidden: "RxJS imports from internal are forbidden."
+    },
+    schema: []
+  },
+  create: context => {
+    return {
+      ["ImportDeclaration Literal[value=/^rxjs\\u002finternal/]"]: (
+        node: es.Literal
+      ) => {
+        context.report({
+          messageId: "forbidden",
+          node
+        });
+      }
+    };
+  }
+};
+
+export = rule;

tests/rules/no-internal.ts

@@ -0,0 +1,59 @@
+/**
+ * @license Use of this source code is governed by an MIT-style license that
+ * can be found in the LICENSE file at https://github.com/cartant/eslint-plugin-rxjs
+ */
+
+import { stripIndent } from "common-tags";
+import rule = require("../../source/rules/no-internal");
+import { ruleTester } from "../utils";
+
+ruleTester({ types: false }).run("no-internal", rule, {
+  valid: [
+    `import { Observable } from "rxjs";`,
+    `import { map } from "rxjs/operators";`
+  ],
+  invalid: [
+    {
+      code: stripIndent`
+        import { concat } from "rxjs/internal/observable/concat";
+        import { map } from "rxjs/internal/operators/map";`,
+      errors: [
+        {
+          messageId: "forbidden",
+          line: 1,
+          column: 24,
+          endLine: 1,
+          endColumn: 57
+        },
+        {
+          messageId: "forbidden",
+          line: 2,
+          column: 21,
+          endLine: 2,
+          endColumn: 50
+        }
+      ]
+    },
+    {
+      code: stripIndent`
+        import { concat } from 'rxjs/internal/observable/concat';
+        import { map } from 'rxjs/internal/operators/map';`,
+      errors: [
+        {
+          messageId: "forbidden",
+          line: 1,
+          column: 24,
+          endLine: 1,
+          endColumn: 57
+        },
+        {
+          messageId: "forbidden",
+          line: 2,
+          column: 21,
+          endLine: 2,
+          endColumn: 50
+        }
+      ]
+    }
+  ]
+});