Add support for raising if you set a tsconfig entry of target/module with the right setting in the root

src/compiler/commandLineParser.ts

@@ -2852,6 +2852,7 @@ namespace ts {
         let typeAcquisition: TypeAcquisition | undefined, typingOptionstypeAcquisition: TypeAcquisition | undefined;
         let watchOptions: WatchOptions | undefined;
         let extendedConfigPath: string | undefined;
+        let rootCompilerOptions: PropertyName[] | undefined;
 
         const optionsIterator: JsonConversionNotifier = {
             onSetValidOptionKeyValueInParent(parentOption: string, option: CommandLineOption, value: CompilerOptionsValue) {
@@ -2894,6 +2895,9 @@ namespace ts {
                 if (key === "excludes") {
                     errors.push(createDiagnosticForNodeInSourceFile(sourceFile, keyNode, Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
                 }
+                if (find(commandOptionsWithoutBuild, (opt) => opt.name === key)) {
+                    rootCompilerOptions = append(rootCompilerOptions, keyNode);
+                }
             }
         };
         const json = convertConfigFileToObject(sourceFile, errors, /*reportOptionsErrors*/ true, optionsIterator);
@@ -2913,6 +2917,11 @@ namespace ts {
             }
         }
 
+        // eslint-disable-next-line no-in-operator
+        if (rootCompilerOptions && json && !("compilerOptions" in json)) {
+            errors.push(createDiagnosticForNodeInSourceFile(sourceFile, rootCompilerOptions[0], Diagnostics._0_should_be_set_inside_the_compilerOptions_object_of_the_config_json_file, getTextOfPropertyName(rootCompilerOptions[0]) as string));
+        }
+
         return { raw: json, options, watchOptions, typeAcquisition, extendedConfigPath };
     }
 

src/compiler/diagnosticMessages.json

@@ -4918,6 +4918,10 @@
         "category": "Message",
         "code": 6257
     },
+    "'{0}' should be set inside the 'compilerOptions' object of the config json file": {
+        "category": "Error",
+        "code": 6258
+    },
 
     "Projects to reference": {
         "category": "Message",

src/testRunner/unittests/config/convertCompilerOptionsFromJson.ts

@@ -663,7 +663,36 @@ namespace ts {
             });
         });
 
-        it("Don't crash when root expression is not objecty at all", () => {
+        it("raises an error if you've set a compiler flag in the root without including 'compilerOptions'", () => {
+            assertCompilerOptionsWithJsonText(`{
+                "module": "esnext",
+            }`, "tsconfig.json", {
+                compilerOptions: {},
+                errors: [{
+                    ...Diagnostics._0_should_be_set_inside_the_compilerOptions_object_of_the_config_json_file,
+                    messageText: "'module' should be set inside the 'compilerOptions' object of the config json file.",
+                    file: undefined,
+                    start: 0,
+                    length: 0
+                }]
+            });
+        });
+
+        it("does not raise an error if you've set a compiler flag in the root when you have included 'compilerOptions'", () => {
+            assertCompilerOptionsWithJsonText(`{
+                "target": "esnext",
+                "compilerOptions": {
+                    "module": "esnext"
+                }
+            }`, "tsconfig.json", {
+                compilerOptions: {
+                    module: ModuleKind.ESNext
+                },
+                errors: []
+            });
+        });
+
+        it("Don't crash when root expression is not object at all", () => {
             assertCompilerOptionsWithJsonText(`42`, "tsconfig.json", {
                 compilerOptions: {},
                 errors: [{

src/testRunner/unittests/tsbuildWatch/programUpdates.ts

@@ -718,7 +718,9 @@ export function someFn() { }`),
                 const alphaExtendedConfigFile: File = {
                     path: "/a/b/alpha.tsconfig.json",
                     content: JSON.stringify({
-                        strict: true
+                        compilerOptions: {
+                            strict: true
+                        }
                     })
                 };
                 const project1Config: File = {
@@ -734,7 +736,9 @@ export function someFn() { }`),
                 const bravoExtendedConfigFile: File = {
                     path: "/a/b/bravo.tsconfig.json",
                     content: JSON.stringify({
-                        strict: true
+                        compilerOptions: {
+                            strict: true
+                        }
                     })
                 };
                 const otherFile: File = {

tests/baselines/reference/tsbuild/watchMode/programUpdates/works-correctly-when-project-with-extended-config-is-removed.js

@@ -16,7 +16,7 @@ interface Array<T> { length: number; [n: number]: T; }
 {"references":[{"path":"./project1.tsconfig.json"},{"path":"./project2.tsconfig.json"}],"files":[]}
 
 //// [/a/b/alpha.tsconfig.json]
-{"strict":true}
+{"compilerOptions":{"strict":true}}
 
 //// [/a/b/project1.tsconfig.json]
 {"extends":"./alpha.tsconfig.json","compilerOptions":{"composite":true},"files":["/a/b/commonFile1.ts","/a/b/commonFile2.ts"]}
@@ -28,7 +28,7 @@ let x = 1
 let y = 1
 
 //// [/a/b/bravo.tsconfig.json]
-{"strict":true}
+{"compilerOptions":{"strict":true}}
 
 //// [/a/b/project2.tsconfig.json]
 {"extends":"./bravo.tsconfig.json","compilerOptions":{"composite":true},"files":["/a/b/other.ts"]}
@@ -60,7 +60,7 @@ Output::
 
 
 Program root files: ["/a/b/commonFile1.ts","/a/b/commonFile2.ts"]
-Program options: {"composite":true,"watch":true,"configFilePath":"/a/b/project1.tsconfig.json"}
+Program options: {"strict":true,"composite":true,"watch":true,"configFilePath":"/a/b/project1.tsconfig.json"}
 Program structureReused: Not
 Program files::
 /a/lib/lib.d.ts
@@ -78,7 +78,7 @@ Shape signatures in builder refreshed for::
 /a/b/commonfile2.ts (used version)
 
 Program root files: ["/a/b/other.ts"]
-Program options: {"composite":true,"watch":true,"configFilePath":"/a/b/project2.tsconfig.json"}
+Program options: {"strict":true,"composite":true,"watch":true,"configFilePath":"/a/b/project2.tsconfig.json"}
 Program structureReused: Not
 Program files::
 /a/lib/lib.d.ts
@@ -117,6 +117,7 @@ FsWatchesRecursive::
 exitCode:: ExitStatus.undefined
 
 //// [/a/b/commonFile1.js]
+"use strict";
 var x = 1;
 
 
@@ -125,6 +126,7 @@ declare let x: number;
 
 
 //// [/a/b/commonFile2.js]
+"use strict";
 var y = 1;
 
 
@@ -133,7 +135,7 @@ declare let y: number;
 
 
 //// [/a/b/project1.tsconfig.tsbuildinfo]
-{"program":{"fileNames":["../lib/lib.d.ts","./commonfile1.ts","./commonfile2.ts"],"fileInfos":[{"version":"-7698705165-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }","affectsGlobalScope":true},{"version":"2167136208-let x = 1","affectsGlobalScope":true},{"version":"2168322129-let y = 1","affectsGlobalScope":true}],"options":{"composite":true},"referencedMap":[],"exportedModulesMap":[],"semanticDiagnosticsPerFile":[2,3,1]},"version":"FakeTSVersion"}
+{"program":{"fileNames":["../lib/lib.d.ts","./commonfile1.ts","./commonfile2.ts"],"fileInfos":[{"version":"-7698705165-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }","affectsGlobalScope":true},{"version":"2167136208-let x = 1","affectsGlobalScope":true},{"version":"2168322129-let y = 1","affectsGlobalScope":true}],"options":{"composite":true,"strict":true},"referencedMap":[],"exportedModulesMap":[],"semanticDiagnosticsPerFile":[2,3,1]},"version":"FakeTSVersion"}
 
 //// [/a/b/project1.tsconfig.tsbuildinfo.readable.baseline.txt]
 {
@@ -161,7 +163,8 @@ declare let y: number;
       }
     },
     "options": {
-      "composite": true
+      "composite": true,
+      "strict": true
     },
     "referencedMap": {},
     "exportedModulesMap": {},
@@ -172,10 +175,11 @@ declare let y: number;
     ]
   },
   "version": "FakeTSVersion",
-  "size": 753
+  "size": 767
 }
 
 //// [/a/b/other.js]
+"use strict";
 var z = 0;
 
 
@@ -184,7 +188,7 @@ declare let z: number;
 
 
 //// [/a/b/project2.tsconfig.tsbuildinfo]
-{"program":{"fileNames":["../lib/lib.d.ts","./other.ts"],"fileInfos":[{"version":"-7698705165-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }","affectsGlobalScope":true},{"version":"2874288940-let z = 0;","affectsGlobalScope":true}],"options":{"composite":true},"referencedMap":[],"exportedModulesMap":[],"semanticDiagnosticsPerFile":[2,1]},"version":"FakeTSVersion"}
+{"program":{"fileNames":["../lib/lib.d.ts","./other.ts"],"fileInfos":[{"version":"-7698705165-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }","affectsGlobalScope":true},{"version":"2874288940-let z = 0;","affectsGlobalScope":true}],"options":{"composite":true,"strict":true},"referencedMap":[],"exportedModulesMap":[],"semanticDiagnosticsPerFile":[2,1]},"version":"FakeTSVersion"}
 
 //// [/a/b/project2.tsconfig.tsbuildinfo.readable.baseline.txt]
 {
@@ -206,7 +210,8 @@ declare let z: number;
       }
     },
     "options": {
-      "composite": true
+      "composite": true,
+      "strict": true
     },
     "referencedMap": {},
     "exportedModulesMap": {},
@@ -216,7 +221,7 @@ declare let z: number;
     ]
   },
   "version": "FakeTSVersion",
-  "size": 666
+  "size": 680
 }