fix: improve directory link handling in markdown

Enhance the openFile function to better handle directory links in markdown:
- Add support for resolving ./SimpleName paths to home directory if not found in workspace
- Improve path resolution by checking multiple potential locations
- Ensure directories are properly revealed in the Explorer view
- Attempt to expand directories after revealing them

Fixes: #3686
Signed-off-by: Eric Wheeler <[email protected]>

Author: Eric Wheeler

src/integrations/misc/open-file.ts

@@ -28,39 +28,104 @@ interface OpenFileOptions {
 
 export async function openFile(filePath: string, options: OpenFileOptions = {}) {
 	try {
-		// Get workspace root
 		const workspaceRoot = getWorkspacePath()
+		const homeDir = os.homedir()
+		const originalFilePathForError = filePath // Keep original for error messages
 
-		// If path starts with ./, resolve it relative to workspace root if available
-		// Otherwise, use the path as provided without modification
-		const fullPath = filePath.startsWith("./")
-			? workspaceRoot
-				? path.join(workspaceRoot, filePath.slice(2))
-				: filePath
-			: filePath
+		const attemptPaths: string[] = []
 
-		const uri = vscode.Uri.file(fullPath)
+		if (filePath.startsWith("./")) {
+			const relativePart = filePath.slice(2)
+			if (workspaceRoot) {
+				attemptPaths.push(path.join(workspaceRoot, relativePart))
+			}
+			if (homeDir) {
+				const homePath = path.join(homeDir, relativePart)
+				// Add home path if it's different from what might have been added via workspaceRoot
+				// (e.g. if workspaceRoot itself is the home directory)
+				if (!attemptPaths.includes(homePath)) {
+					attemptPaths.push(homePath)
+				}
+			}
+			// If no workspace and no home, or if paths were identical.
+			if (attemptPaths.length === 0) {
+				attemptPaths.push(filePath) // Try the original relative path as a last resort
+			}
+		} else {
+			attemptPaths.push(filePath) // Assumed absolute or directly resolvable
+		}
 
-		// Check if file exists
-		try {
-			await vscode.workspace.fs.stat(uri)
-		} catch {
-			// File doesn't exist
-			if (!options.create) {
-				throw new Error("File does not exist")
+		let fileStat: vscode.FileStat | undefined
+		let successfulUri: vscode.Uri | undefined
+
+		for (const p of attemptPaths) {
+			try {
+				const tempUri = vscode.Uri.file(p)
+				fileStat = await vscode.workspace.fs.stat(tempUri)
+				successfulUri = tempUri // Path found
+				break // Exit loop once a path is successfully stated
+			} catch (e) {
+				// Stat failed for this path, continue to the next one
 			}
+		}
 
-			// Create with provided content or empty string
-			const content = options.content || ""
-			await vscode.workspace.fs.writeFile(uri, Buffer.from(content, "utf8"))
+		let uriToProcess: vscode.Uri
+
+		if (fileStat && successfulUri) {
+			// Path was found
+			if (fileStat.type === vscode.FileType.Directory) {
+				await vscode.commands.executeCommand("revealInExplorer", successfulUri)
+				// Attempt to expand the revealed directory in the explorer.
+				// This requires the explorer to have focus and the item to be selected.
+				// A slight delay might sometimes be needed for focus to shift,
+				// but often it works immediately after revealInExplorer.
+				try {
+					await vscode.commands.executeCommand("list.expand")
+				} catch (expandError) {
+					// Log or handle if expansion specifically fails, though often not critical
+					console.warn("Could not expand directory in explorer:", expandError)
+				}
+				return // Done for directories
+			}
+			uriToProcess = successfulUri // It's an existing file
+		} else {
+			// Path was not found in any attempted locations. Consider creation.
+			if (
+				options.create &&
+				!(originalFilePathForError.endsWith("/") || originalFilePathForError.endsWith("\\"))
+			) {
+				let pathToCreateAt: string
+				if (originalFilePathForError.startsWith("./")) {
+					const relativePart = originalFilePathForError.slice(2)
+					if (workspaceRoot) {
+						pathToCreateAt = path.join(workspaceRoot, relativePart)
+					} else if (homeDir) {
+						pathToCreateAt = path.join(homeDir, relativePart)
+					} else {
+						pathToCreateAt = originalFilePathForError // Fallback: use original relative path
+					}
+				} else {
+					pathToCreateAt = originalFilePathForError // Absolute path
+				}
+
+				uriToProcess = vscode.Uri.file(pathToCreateAt)
+				const contentToCreate = options.content || ""
+				await vscode.workspace.fs.writeFile(uriToProcess, Buffer.from(contentToCreate, "utf8"))
+				// File is now created, uriToProcess points to it.
+			} else {
+				// Not creating, or it's a directory-like path that doesn't exist.
+				throw new Error(`Path does not exist: ${originalFilePathForError}`)
+			}
 		}
 
+		// At this point, uriToProcess points to an existing file or a newly created file.
 		// Check if the document is already open in a tab group that's not in the active editor's column
 		try {
 			for (const group of vscode.window.tabGroups.all) {
 				const existingTab = group.tabs.find(
 					(tab) =>
-						tab.input instanceof vscode.TabInputText && arePathsEqual(tab.input.uri.fsPath, uri.fsPath),
+						tab.input instanceof vscode.TabInputText &&
+						arePathsEqual(tab.input.uri.fsPath, uriToProcess.fsPath),
 				)
 				if (existingTab) {
 					const activeColumn = vscode.window.activeTextEditor?.viewColumn
@@ -75,7 +140,7 @@ export async function openFile(filePath: string, options: OpenFileOptions = {})
 			}
 		} catch {} // not essential, sometimes tab operations fail
 
-		const document = await vscode.workspace.openTextDocument(uri)
+		const document = await vscode.workspace.openTextDocument(uriToProcess)
 		const selection =
 			options.line !== undefined ? new vscode.Selection(options.line - 1, 0, options.line - 1, 0) : undefined
 		await vscode.window.showTextDocument(document, {