Fixes #48714: Added conversion from local case of the file to git case. This...

Fixes #48714: Added conversion from local case of the file to git case.  This does not fix the view in the Explorer, but this solution should be easy to apply to that issue too.

extensions/git/src/git.ts

@@ -738,6 +738,27 @@ export class Repository {
 		return { mode, object, size: parseInt(size) };
 	}
 
+	async lstreeOutput(treeish: string, path: string): Promise<string> {
+		if (!treeish) { // index
+			const { stdout } = await this.run(['ls-files', '--stage', '--', path]);
+			return stdout;
+		}
+
+		const { stdout } = await this.run(['ls-tree', '-l', treeish, '--', path]);
+		return stdout;
+	}
+
+	async relativePathToGitRelativePath(treeish: string, path: string): Promise<string> {
+		let gitPath: string = path;
+		const pathPrefix = path.substring(0, path.lastIndexOf('/'));
+		const lstOutput = await this.lstreeOutput(treeish, pathPrefix + '/');
+		const findResult = lstOutput.toUpperCase().indexOf(path.toUpperCase());
+		if (findResult) {
+			gitPath = lstOutput.substr(findResult, path.length);
+		}
+		return gitPath;
+	}
+
 	async detectObjectType(object: string): Promise<{ mimetype: string, encoding?: string }> {
 		const child = await this.stream(['show', object]);
 		const buffer = await readBytes(child.stdout, 4100);

extensions/git/src/repository.ts

@@ -811,12 +811,17 @@ export class Repository implements Disposable {
 	}
 
 	async show(ref: string, filePath: string): Promise<string> {
-		return this.run(Operation.Show, () => {
-			const relativePath = path.relative(this.repository.root, filePath).replace(/\\/g, '/');
+		return this.run(Operation.Show, async () => {
+			let relativePath = path.relative(this.repository.root, filePath).replace(/\\/g, '/');
 			const configFiles = workspace.getConfiguration('files', Uri.file(filePath));
 			const defaultEncoding = configFiles.get<string>('encoding');
 			const autoGuessEncoding = configFiles.get<boolean>('autoGuessEncoding');
 
+			if (ref === '') {
+				ref = 'HEAD';
+			}
+
+			relativePath = await this.repository.relativePathToGitRelativePath(ref, relativePath);
 			return this.repository.bufferString(`${ref}:${relativePath}`, defaultEncoding, autoGuessEncoding);
 		});
 	}