guard against cases when current file name is already in uppercase

vladima · vladima · commit 5cdbe773c6a8 · 2016-10-03T14:42:06.000-07:00
diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
@@ -316,10 +316,9 @@ namespace ts {
                 if (platform === "win32" || platform === "win64") {
                     return false;
                 }
-
-                const upperCaseFilename = _path.basename(__filename).toUpperCase();
-
-                return !fileExists(_path.join(_path.dirname(__filename), upperCaseFilename));
+                // convert current file name to upper case / lower case and check if file exists
+                // (guards against cases when name is already all uppercase or lowercase)
+                return !fileExists(__filename.toUpperCase()) || !fileExists(__filename.toLowerCase());
             }
 
             const platform: string = _os.platform();

Original file line number	Diff line number	Diff line change
`@@ -316,10 +316,9 @@ namespace ts {`
`316`	`316`	`if (platform === "win32" \|\| platform === "win64") {`
`317`	`317`	`return false;`
`318`	`318`	`}`
`319`		`-`
`320`		`- const upperCaseFilename = _path.basename(__filename).toUpperCase();`
`321`		`-`
`322`		`- return !fileExists(_path.join(_path.dirname(__filename), upperCaseFilename));`
	`319`	`+ // convert current file name to upper case / lower case and check if file exists`
	`320`	`+ // (guards against cases when name is already all uppercase or lowercase)`
	`321`	`+ return !fileExists(__filename.toUpperCase()) \|\| !fileExists(__filename.toLowerCase());`
`323`	`322`	`}`
`324`	`323`
`325`	`324`	`const platform: string = _os.platform();`