Ensure that when doing inode watching watchers is replaces only on disappearance or appearance

src/compiler/sys.ts

@@ -1147,7 +1147,12 @@ namespace ts {
                     (!relativeName ||
                         relativeName === lastDirectoryPart ||
                         (relativeName.lastIndexOf(lastDirectoryPartWithDirectorySeparator!) !== -1 && relativeName.lastIndexOf(lastDirectoryPartWithDirectorySeparator!) === relativeName.length - lastDirectoryPartWithDirectorySeparator!.length))) {
-                    updateWatcher(!fileSystemEntryExists(fileOrDirectory, entryKind) ? watchMissingFileSystemEntry : watchPresentFileSystemEntry);
+                    if (inodeWatching) {
+                        updateWatcher(!fileSystemEntryExists(fileOrDirectory, entryKind) ? watchMissingFileSystemEntry : watchPresentFileSystemEntry);
+                    }
+                    else if (!fileSystemEntryExists(fileOrDirectory, entryKind)) {
+                        updateWatcher(watchMissingFileSystemEntry);
+                    }
                 }
             }
 

src/testRunner/unittests/tscWatch/watchEnvironment.ts

@@ -582,6 +582,41 @@ namespace ts.tscWatch {
             });
         });
 
+        verifyTscWatch({
+            scenario,
+            subScenario: `fsWatch/when using file watching thats when rename occurs when file is still on the disk`,
+            commandLineArgs: ["-w", "--extendedDiagnostics"],
+            sys: () => createWatchedSystem(
+                {
+                    [libFile.path]: libFile.content,
+                    [`${projectRoot}/main.ts`]: `import { foo } from "./foo"; foo();`,
+                    [`${projectRoot}/foo.ts`]: `export declare function foo(): string;`,
+                    [`${projectRoot}/tsconfig.json`]: JSON.stringify({
+                        watchOptions: { watchFile: "useFsEvents" },
+                        files: ["foo.ts", "main.ts"]
+                    }),
+                },
+                { currentDirectory: projectRoot, }
+            ),
+            changes: [
+                {
+                    caption: "Introduce error such that when callback happens file is already appeared",
+                    // vm's wq generates this kind of event
+                    // Skip delete event so inode changes but when the create's rename occurs file is on disk
+                    change: sys => sys.modifyFile(`${projectRoot}/foo.ts`, `export declare function foo2(): string;`, {
+                        invokeFileDeleteCreateAsPartInsteadOfChange: true,
+                        ignoreDelete: true,
+                    }),
+                    timeouts: sys => sys.checkTimeoutQueueLengthAndRun(1),
+                },
+                {
+                    caption: "Replace file with rename event that fixes error",
+                    change: sys => sys.modifyFile(`${projectRoot}/foo.ts`, `export declare function foo(): string;`, { invokeFileDeleteCreateAsPartInsteadOfChange: true, }),
+                    timeouts: sys => sys.checkTimeoutQueueLengthAndRun(1),
+                },
+            ]
+        });
+
         describe("with fsWatch on inodes", () => {
             verifyTscWatch({
                 scenario,

tests/baselines/reference/tscWatch/watchEnvironment/fsWatch/when-using-file-watching-thats-when-rename-occurs-when-file-is-still-on-the-disk.js

@@ -0,0 +1,220 @@
+Input::
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+
+//// [/user/username/projects/myproject/main.ts]
+import { foo } from "./foo"; foo();
+
+//// [/user/username/projects/myproject/foo.ts]
+export declare function foo(): string;
+
+//// [/user/username/projects/myproject/tsconfig.json]
+{"watchOptions":{"watchFile":"useFsEvents"},"files":["foo.ts","main.ts"]}
+
+
+/a/lib/tsc.js -w --extendedDiagnostics
+Output::
+[12:00:23 AM] Starting compilation in watch mode...
+
+Current directory: /user/username/projects/myproject CaseSensitiveFileNames: false
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/tsconfig.json 2000 {"watchFile":4} Config file
+Synchronizing program
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/foo.ts","/user/username/projects/myproject/main.ts"]
+  options: {"watch":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/foo.ts 250 {"watchFile":4} Source file
+FileWatcher:: Added:: WatchInfo: /user/username/projects/myproject/main.ts 250 {"watchFile":4} Source file
+FileWatcher:: Added:: WatchInfo: /a/lib/lib.d.ts 250 {"watchFile":4} Source file
+DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 {"watchFile":4} Type roots
+Elapsed:: *ms DirectoryWatcher:: Added:: WatchInfo: /user/username/projects/myproject/node_modules/@types 1 {"watchFile":4} Type roots
+[12:00:28 AM] Found 0 errors. Watching for file changes.
+
+
+
+Program root files: ["/user/username/projects/myproject/foo.ts","/user/username/projects/myproject/main.ts"]
+Program options: {"watch":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
+Program structureReused: Not
+Program files::
+/a/lib/lib.d.ts
+/user/username/projects/myproject/foo.ts
+/user/username/projects/myproject/main.ts
+
+Semantic diagnostics in builder refreshed for::
+/a/lib/lib.d.ts
+/user/username/projects/myproject/foo.ts
+/user/username/projects/myproject/main.ts
+
+Shape signatures in builder refreshed for::
+/a/lib/lib.d.ts (used version)
+/user/username/projects/myproject/foo.ts (used version)
+/user/username/projects/myproject/main.ts (used version)
+
+WatchedFiles::
+/user/username/projects/myproject/node_modules/@types:
+  {"fileName":"/user/username/projects/myproject/node_modules/@types","pollingInterval":500}
+
+FsWatches::
+/user/username/projects/myproject/tsconfig.json:
+  {"directoryName":"/user/username/projects/myproject/tsconfig.json"}
+/user/username/projects/myproject/foo.ts:
+  {"directoryName":"/user/username/projects/myproject/foo.ts"}
+/user/username/projects/myproject/main.ts:
+  {"directoryName":"/user/username/projects/myproject/main.ts"}
+/a/lib/lib.d.ts:
+  {"directoryName":"/a/lib/lib.d.ts"}
+
+FsWatchesRecursive::
+
+exitCode:: ExitStatus.undefined
+
+//// [/user/username/projects/myproject/foo.js]
+"use strict";
+exports.__esModule = true;
+
+
+//// [/user/username/projects/myproject/main.js]
+"use strict";
+exports.__esModule = true;
+var foo_1 = require("./foo");
+(0, foo_1.foo)();
+
+
+
+Change:: Introduce error such that when callback happens file is already appeared
+
+Input::
+//// [/user/username/projects/myproject/foo.ts]
+export declare function foo2(): string;
+
+
+Output::
+FileWatcher:: Triggered with /user/username/projects/myproject/foo.ts 0:: WatchInfo: /user/username/projects/myproject/foo.ts 250 {"watchFile":4} Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/foo.ts 0:: WatchInfo: /user/username/projects/myproject/foo.ts 250 {"watchFile":4} Source file
+Synchronizing program
+[12:00:32 AM] File change detected. Starting incremental compilation...
+
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/foo.ts","/user/username/projects/myproject/main.ts"]
+  options: {"watch":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
+main.ts:1:10 - error TS2724: '"./foo"' has no exported member named 'foo'. Did you mean 'foo2'?
+
+1 import { foo } from "./foo"; foo();
+           ~~~
+
+  foo.ts:1:25
+    1 export declare function foo2(): string;
+                              ~~~~
+    'foo2' is declared here.
+
+[12:00:39 AM] Found 1 error. Watching for file changes.
+
+
+
+Program root files: ["/user/username/projects/myproject/foo.ts","/user/username/projects/myproject/main.ts"]
+Program options: {"watch":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
+Program structureReused: Completely
+Program files::
+/a/lib/lib.d.ts
+/user/username/projects/myproject/foo.ts
+/user/username/projects/myproject/main.ts
+
+Semantic diagnostics in builder refreshed for::
+/user/username/projects/myproject/foo.ts
+/user/username/projects/myproject/main.ts
+
+Shape signatures in builder refreshed for::
+/user/username/projects/myproject/foo.ts (computed .d.ts)
+/user/username/projects/myproject/main.ts (computed .d.ts)
+
+WatchedFiles::
+/user/username/projects/myproject/node_modules/@types:
+  {"fileName":"/user/username/projects/myproject/node_modules/@types","pollingInterval":500}
+
+FsWatches::
+/user/username/projects/myproject/tsconfig.json:
+  {"directoryName":"/user/username/projects/myproject/tsconfig.json"}
+/user/username/projects/myproject/foo.ts:
+  {"directoryName":"/user/username/projects/myproject/foo.ts"}
+/user/username/projects/myproject/main.ts:
+  {"directoryName":"/user/username/projects/myproject/main.ts"}
+/a/lib/lib.d.ts:
+  {"directoryName":"/a/lib/lib.d.ts"}
+
+FsWatchesRecursive::
+
+exitCode:: ExitStatus.undefined
+
+//// [/user/username/projects/myproject/foo.js] file written with same contents
+//// [/user/username/projects/myproject/main.js] file written with same contents
+
+Change:: Replace file with rename event that fixes error
+
+Input::
+//// [/user/username/projects/myproject/foo.ts]
+export declare function foo(): string;
+
+
+Output::
+FileWatcher:: Triggered with /user/username/projects/myproject/foo.ts 2:: WatchInfo: /user/username/projects/myproject/foo.ts 250 {"watchFile":4} Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/foo.ts 2:: WatchInfo: /user/username/projects/myproject/foo.ts 250 {"watchFile":4} Source file
+FileWatcher:: Triggered with /user/username/projects/myproject/foo.ts 0:: WatchInfo: /user/username/projects/myproject/foo.ts 250 {"watchFile":4} Source file
+Scheduling update
+Elapsed:: *ms FileWatcher:: Triggered with /user/username/projects/myproject/foo.ts 0:: WatchInfo: /user/username/projects/myproject/foo.ts 250 {"watchFile":4} Source file
+Synchronizing program
+[12:00:43 AM] File change detected. Starting incremental compilation...
+
+CreatingProgramWith::
+  roots: ["/user/username/projects/myproject/foo.ts","/user/username/projects/myproject/main.ts"]
+  options: {"watch":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
+[12:00:50 AM] Found 0 errors. Watching for file changes.
+
+
+
+Program root files: ["/user/username/projects/myproject/foo.ts","/user/username/projects/myproject/main.ts"]
+Program options: {"watch":true,"extendedDiagnostics":true,"configFilePath":"/user/username/projects/myproject/tsconfig.json"}
+Program structureReused: SafeModules
+Program files::
+/a/lib/lib.d.ts
+/user/username/projects/myproject/foo.ts
+/user/username/projects/myproject/main.ts
+
+Semantic diagnostics in builder refreshed for::
+/user/username/projects/myproject/foo.ts
+/user/username/projects/myproject/main.ts
+
+Shape signatures in builder refreshed for::
+/user/username/projects/myproject/foo.ts (computed .d.ts)
+/user/username/projects/myproject/main.ts (computed .d.ts)
+
+WatchedFiles::
+/user/username/projects/myproject/node_modules/@types:
+  {"fileName":"/user/username/projects/myproject/node_modules/@types","pollingInterval":500}
+
+FsWatches::
+/user/username/projects/myproject/tsconfig.json:
+  {"directoryName":"/user/username/projects/myproject/tsconfig.json"}
+/user/username/projects/myproject/foo.ts:
+  {"directoryName":"/user/username/projects/myproject/foo.ts"}
+/user/username/projects/myproject/main.ts:
+  {"directoryName":"/user/username/projects/myproject/main.ts"}
+/a/lib/lib.d.ts:
+  {"directoryName":"/a/lib/lib.d.ts"}
+
+FsWatchesRecursive::
+
+exitCode:: ExitStatus.undefined
+
+//// [/user/username/projects/myproject/foo.js] file written with same contents
+//// [/user/username/projects/myproject/main.js] file written with same contents