eslint-plugin: add support for inline packages

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

packages/eslint-plugin/src/__fixtures__/monorepo/packages/bar/package.json

@@ -1,14 +1,15 @@
 {
   "name": "@internal/bar",
+  "backstage": {
+    "role": "frontend-plugin"
+  },
   "exports": {
     ".": "./src/index.ts",
     "./BarPage": "./src/components/Bar.tsx",
     "./package.json": "./package.json"
   },
-  "backstage": {
-    "role": "frontend-plugin"
-  },
   "dependencies": {
+    "inline-dep": "*",
     "react-router": "*"
   },
   "devDependencies": {

packages/eslint-plugin/src/__fixtures__/monorepo/packages/inline-dep-invalid-direct/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "@internal/inline-dep-direct",
+  "files": [
+    "dist",
+    "type-utils"
+  ],
+  "dependencies": {
+    "@internal/inline": "workspace:^",
+    "@internal/inline-dep-valid": "workspace:^",
+    "react": "*"
+  }
+}

packages/eslint-plugin/src/__fixtures__/monorepo/packages/inline-dep-invalid-missing/package.json

@@ -0,0 +1,7 @@
+{
+  "name": "@internal/inline-dep-missing",
+  "files": [
+    "dist",
+    "type-utils"
+  ]
+}

packages/eslint-plugin/src/__fixtures__/monorepo/packages/inline-dep-valid/package.json

@@ -0,0 +1,10 @@
+{
+  "name": "@internal/inline-dep-valid",
+  "files": [
+    "dist",
+    "type-utils"
+  ],
+  "peerDependencies": {
+    "react": "*"
+  }
+}

packages/eslint-plugin/src/__fixtures__/monorepo/packages/inline/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "@internal/inline",
+  "backstage": {
+    "inline": true
+  },
+  "files": [
+    "dist",
+    "type-utils"
+  ],
+  "dependencies": {
+    "@internal/inline-dep-valid": "workspace:^"
+  },
+  "peerDependencies": {
+    "react": "*"
+  }
+}

packages/eslint-plugin/src/no-undeclared-imports.test.ts

@@ -52,6 +52,12 @@ const ERR_SWITCHED = (
 const ERR_SWITCH_BACK = () => ({
   message: 'Switch back to import declaration',
 });
+const ERR_INLINE_DIRECT = (name: string) => ({
+  message: `The dependency on the inline package ${name} must not be declared in package dependencies.`,
+});
+const ERR_INLINE_MISSING = (name: string, missing: string) => ({
+  message: `Each production dependency from the inline package ${name} must be re-declared by this package, the following dependencies are missing: ${missing}`,
+});
 
 // cwd must be restored
 const origDir = process.cwd();
@@ -102,6 +108,17 @@ ruleTester.run(RULE, rule, {
       code: `require('lod' + 'ash')`,
       filename: joinPath(FIXTURE, 'packages/bar/src/index.ts'),
     },
+    {
+      code: `import '@internal/inline'`,
+      filename: joinPath(FIXTURE, 'packages/inline-dep-valid/src/index.ts'),
+    },
+    {
+      code: `import '@internal/inline'`,
+      filename: joinPath(
+        FIXTURE,
+        'packages/inline-dep-valid/src/index.test.ts',
+      ),
+    },
   ],
   invalid: [
     {
@@ -264,6 +281,29 @@ ruleTester.run(RULE, rule, {
         ),
       ],
     },
+    {
+      code: `import '@internal/inline'`,
+      output: `import 'directive:inline-imports:@internal/inline'`,
+      filename: joinPath(
+        FIXTURE,
+        'packages/inline-dep-invalid-direct/src/index.ts',
+      ),
+      errors: [ERR_INLINE_DIRECT('@internal/inline')],
+    },
+    {
+      code: `import '@internal/inline'`,
+      output: `import 'directive:inline-imports:@internal/inline'`,
+      filename: joinPath(
+        FIXTURE,
+        'packages/inline-dep-invalid-missing/src/index.ts',
+      ),
+      errors: [
+        ERR_INLINE_MISSING(
+          '@internal/inline',
+          '@internal/inline-dep-valid, react',
+        ),
+      ],
+    },
 
     // Switching back to original import declarations
     {
@@ -302,5 +342,14 @@ ruleTester.run(RULE, rule, {
       filename: joinPath(FIXTURE, 'packages/bar/src/index.ts'),
       errors: [ERR_SWITCH_BACK()],
     },
+    {
+      code: `import 'directive:inline-imports:@internal/inline'`,
+      output: `import '@internal/inline'`,
+      filename: joinPath(
+        FIXTURE,
+        'packages/inline-dep-invalid-direct/src/index.ts',
+      ),
+      errors: [ERR_SWITCH_BACK()],
+    },
   ],
 });