feat(no-compat): Add no-compat rule.

package.json

@@ -59,7 +59,7 @@
     "test": "yarn run lint && yarn run test:build && yarn run test:mocha && yarn run test:tslint-v5 && yarn run test:tslint-v6 && yarn run test:tslint-v6-compat",
     "test:build": "yarn run test:clean && tsc -p tsconfig.json",
     "test:clean": "rimraf build",
-    "test:debug": "tslint --test ./test/v6/fixtures/issues/70/tslint.json",
+    "test:debug": "tslint --test ./test/v6/fixtures/no-compat/default/tslint.json",
     "test:issues": "yarn run test:clean && tsc -p tsconfig.json && tslint --test ./test/v6/fixtures/issues/**/tslint.json",
     "test:mocha": "mocha build/**/*-spec.js",
     "test:tslint-v5": "yarn --cwd ./test/v5 install && yarn --cwd ./test/v5 upgrade && tslint --test ./test/v5/fixtures/**/tslint.json",

source/rules/rxjsNoCompatRule.ts

@@ -0,0 +1,47 @@
+/**
+ * @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/rxjs-tslint-rules
+ */
+/*tslint:disable:no-use-before-declare*/
+
+import * as Lint from "tslint";
+import * as ts from "typescript";
+import { tsquery } from "@phenomnomnominal/tsquery";
+
+export class Rule extends Lint.Rules.AbstractRule {
+
+    public static metadata: Lint.IRuleMetadata = {
+        deprecationMessage: undefined,
+        description: "Disallows importation from locations that depend upon 'rxjs-compat'.",
+        options: null,
+        optionsDescription: "Not configurable.",
+        requiresTypeInfo: false,
+        ruleName: "rxjs-no-compat",
+        type: "functionality",
+        typescriptOnly: false
+    };
+
+    public static FAILURE_STRING = "'rxjs-compat' dependent import locations are forbidden";
+
+    public apply(sourceFile: ts.SourceFile): Lint.RuleFailure[] {
+        const failures: Lint.RuleFailure[] = [];
+        const importDeclarations = tsquery(
+            sourceFile,
+            `ImportDeclaration:has(StringLiteral[value=/^rxjs/])`
+        );
+        importDeclarations.forEach(node => {
+            const importDeclaration = node as ts.ImportDeclaration;
+            const { moduleSpecifier } = importDeclaration;
+            if (!/^['"]rxjs(\/(ajax|operators|testing|webSocket))?['"]$/.test(moduleSpecifier.getText())) {
+                failures.push(new Lint.RuleFailure(
+                    sourceFile,
+                    moduleSpecifier.getStart(),
+                    moduleSpecifier.getStart() + moduleSpecifier.getWidth(),
+                    Rule.FAILURE_STRING,
+                    this.ruleName
+                ));
+            }
+        });
+        return failures;
+    }
+}

test/v6/fixtures/no-compat/default/fixture.ts.lint

@@ -0,0 +1,25 @@
+import { Observable } from "rxjs";
+import { ajax } from "rxjs/ajax";
+import { concatMap } from "rxjs/operators";
+import { TestScheduler } from "rxjs/testing";
+import { webSocket } from "rxjs/webSocket";
+
+import * as Rx from "rxjs/Rx";
+                    ~~~~~~~~~                       [no-compat]
+import { Observable } from "rxjs/Observable";
+                           ~~~~~~~~~~~~~~~~~        [no-compat]
+import { Subject } from "rxjs/Subject";
+                        ~~~~~~~~~~~~~~              [no-compat]
+import { merge } from "rxjs/observable/merge";
+                      ~~~~~~~~~~~~~~~~~~~~~~~       [no-compat]
+import { mergeMap } from "rxjs/operator/mergeMap";
+                         ~~~~~~~~~~~~~~~~~~~~~~~~   [no-compat]
+import { asap } from "rxjs/scheduler/asap";
+                     ~~~~~~~~~~~~~~~~~~~~~          [no-compat]
+
+import "rxjs/add/observable/merge";
+       ~~~~~~~~~~~~~~~~~~~~~~~~~~~                  [no-compat]
+import "rxjs/add/operator/mergeMap";
+       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~                 [no-compat]
+
+[no-compat]: 'rxjs-compat' dependent import locations are forbidden

test/v6/fixtures/no-compat/default/tsconfig.json

@@ -0,0 +1,13 @@
+{
+  "compilerOptions": {
+    "baseUrl": ".",
+    "lib": ["es2015"],
+    "noEmit": true,
+    "paths": {
+      "rxjs": ["../../node_modules/rxjs"]
+    },
+    "skipLibCheck": true,
+    "target": "es5"
+  },
+  "include": ["fixture.ts"]
+}

test/v6/fixtures/no-compat/default/tslint.json

@@ -0,0 +1,8 @@
+{
+  "defaultSeverity": "error",
+  "jsRules": {},
+  "rules": {
+    "rxjs-no-compat": { "severity": "error" }
+  },
+  "rulesDirectory": "../../../../../build/rules"
+}