Fix call hierarchy file node paths by Copilot · Pull Request #64108 · microsoft/TypeScript

Copilot · 2026-08-31T17:39:23Z

TypeScript 7 call hierarchy file nodes displayed absolute paths, making large hierarchies difficult to scan.

Display: Use the file basename as the node name.
Context: Show the project-relative containing directory as detail.
Navigation: Preserve the absolute file URI.
Coverage: Add a subdirectory regression case and update affected call hierarchy baselines.

Before: /workspace/src/callers.ts
After:  callers.ts  src

Fixes On TypeScript 7, Call hierarchy shows a full absolute path instead of file name + relative path #64097

Co-authored-by: RyanCavanaugh <6685088+RyanCavanaugh@users.noreply.github.com>

Jake Bailey (jakebailey) · 2026-09-01T18:16:12Z

I'm not sure this is 100% right; it turns out that the old VS Code extension did vscode.workspace.asRelativePath(path.dirname(item.file)) which actually made the path relative to the workspace root.

I think we'd have to somehow plumb that info down from the init message.

Brian (brian-xu-vlt) · 2026-10-31T08:52:15Z

Hi! As OP on the issue #64097, I was wondering if there is any progress on this issue? Can I help in any way?

Jake Bailey (jakebailey) · 2026-10-31T10:50:56Z

Copilot merge main and do better per the above

…archy-file-path # Conflicts: # tsc/internal/ls/callhierarchy.go Co-authored-by: jakebailey <5341706+jakebailey@users.noreply.github.com>

Co-authored-by: jakebailey <5341706+jakebailey@users.noreply.github.com>

Copilot · 2026-10-31T11:27:25Z

Copilot merge main and do better per the above

Merged main in ce08218. In 1de9546, call hierarchy details use initialized workspace folders with typed paths, including named multi-root folders and VS Code’s workspace-root parent lookup. Navigation URIs remain unchanged. Build, tests, lint, and format passed; CodeQL was blocked by a Git diff timeout.

Copilot

🟡 Changes recommended

Workspace-folder selection relies on UTF-8 byte length rather than case-aware ancestry, which can select an outer folder on case-insensitive hosts and produce incorrect call-hierarchy details.

1 open issue

Select deepest workspace folder using case-aware ancestry · New

What changed in this PR

This PR addresses #64097 by making call hierarchy file nodes easier to scan in the native TypeScript language server while preserving navigation targets.

Changes:

Display file basenames with workspace-relative directory details where applicable.
Pass workspace folder paths and names from server initialization to the language service.
Add workspace regression cases and update call hierarchy baselines.

File	Description
`tsc/testdata/baselines/reference/fourslash/callHierarchy/callHierarchyInterfaceMethod.callHierarchy.txt`	Updates incoming file labels and directory details.
`tsc/testdata/baselines/reference/fourslash/callHierarchy/callHierarchyFileWorkspaceRootUri.callHierarchy.txt`	Records root-URI-relative details.
`tsc/testdata/baselines/reference/fourslash/callHierarchy/callHierarchyFileWorkspaceFolders.callHierarchy.txt`	Records nested workspace selection and naming.
`tsc/testdata/baselines/reference/fourslash/callHierarchy/callHierarchyFileWorkspaceFolderRoot.callHierarchy.txt`	Records details for files at a workspace root.
`tsc/testdata/baselines/reference/fourslash/callHierarchy/callHierarchyFileOutsideWorkspace.callHierarchy.txt`	Records absolute-directory fallback outside workspaces.
`tsc/testdata/baselines/reference/fourslash/callHierarchy/callHierarchyFileNestedWorkspaceRoot.callHierarchy.txt`	Records nested-root directory handling.
`tsc/testdata/baselines/reference/fourslash/callHierarchy/callHierarchyFile.callHierarchy.txt`	Updates the subdirectory regression baseline.
`tsc/testdata/baselines/reference/fourslash/callHierarchy/callHierarchyExportEqualsFunction.callHierarchy.txt`	Updates source-file module labels.
`tsc/testdata/baselines/reference/fourslash/callHierarchy/callHierarchyCallExpressionByConstNamedFunctionExpression.callHierarchy.txt`	Updates incoming file labels.
`tsc/testdata/baselines/reference/fourslash/callHierarchy/callHierarchyAnonymousFunctionNoCrash2.callHierarchy.txt`	Updates anonymous-function fallback labels.
`tsc/testdata/baselines/reference/fourslash/callHierarchy/callHierarchyAnonymousClassNoCrash2.callHierarchy.txt`	Updates anonymous-class fallback labels.
`tsc/internal/project/snapshot.go`	Exposes workspace folders to the language service.
`tsc/internal/project/session.go`	Adds initial workspace folder metadata.
`tsc/internal/lsp/server.go`	Captures workspace paths and display names during initialization.
`tsc/internal/ls/host.go`	Defines workspace folder metadata and its host accessor.
`tsc/internal/ls/file_rename_test.go`	Updates the test host for the extended interface.
`tsc/internal/ls/callhierarchy.go`	Formats file basenames and workspace-aware directory details.
`tsc/internal/fourslash/tests/callHierarchyFile_test.go`	Adds subdirectory and workspace regression cases.
`tsc/internal/fourslash/fourslash.go`	Allows tests to supply workspace initialization parameters.

_{Review effort: Balanced}

Jake Bailey (jakebailey) · 2026-10-31T16:47:30Z

+			if l.CaseSensitivity().ComparePaths(folder.Path.AsPath(), directory.AsPath()) == 0 {
+				searchDirectory = directory.AsPath().Directory()
+			}
+			if l.CaseSensitivity().ContainsPath(folder.Path, searchDirectory.AsPath()) && (containingFolder == nil || len(folder.Path) > len(containingFolder.Path)) {


Copilot investigate, also why so many AsPaths

Fixed in 5e5788f: workspace-folder depth is now determined with case-aware ancestry, with a regression test for the Unicode case-folding scenario. The .AsPath() calls convert RootedDirectoryPath values to the distinct RootedPath type required by the path-comparison APIs; they are type conversions, not repeated path normalization.

Co-authored-by: jakebailey <5341706+jakebailey@users.noreply.github.com>

Initial plan

f922233

Copilot AI assigned Copilot and Ryan Cavanaugh (RyanCavanaugh) Aug 31, 2026

typescript-automation Bot added the For Milestone Bug PRs that fix a bug with a specific milestone label Aug 31, 2026

Copilot started work on behalf of Ryan Cavanaugh (RyanCavanaugh) August 31, 2026 17:39

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Copilot AI linked an issue Aug 31, 2026 that may be closed by this pull request

On TypeScript 7, Call hierarchy shows a full absolute path instead of file name + relative path #64097

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typescript-automation Bot added For Uncommitted Bug PR for untriaged, rejected, closed or missing bug and removed For Milestone Bug PRs that fix a bug with a specific milestone labels Aug 31, 2026

Fix call hierarchy file path display

a57f105

Co-authored-by: RyanCavanaugh <6685088+RyanCavanaugh@users.noreply.github.com>

Copilot AI changed the title ~~[WIP] Fix call hierarchy to show relative file paths instead of absolute~~ Fix call hierarchy file node paths Aug 31, 2026

Copilot finished work on behalf of Ryan Cavanaugh (RyanCavanaugh) August 31, 2026 18:02

Copilot AI requested a review from Ryan Cavanaugh (RyanCavanaugh) August 31, 2026 18:02

Copilot started work on behalf of Jake Bailey (jakebailey) October 31, 2026 10:51

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Merge remote-tracking branch 'origin/main' into copilot/fix-call-hier…

ce08218

…archy-file-path # Conflicts: # tsc/internal/ls/callhierarchy.go Co-authored-by: jakebailey <5341706+jakebailey@users.noreply.github.com>

typescript-automation Bot added the Author: Team label Oct 31, 2026

Make call hierarchy file details workspace-relative

1de9546

Co-authored-by: jakebailey <5341706+jakebailey@users.noreply.github.com>

Copilot finished work on behalf of Jake Bailey (jakebailey) October 31, 2026 11:28

Copilot AI requested a review from Jake Bailey (jakebailey) October 31, 2026 11:28

Jake Bailey (jakebailey) requested a balanced review from Copilot October 31, 2026 11:37

Copilot started reviewing on behalf of Jake Bailey (jakebailey) October 31, 2026 11:37

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Copilot started work on behalf of Jake Bailey (jakebailey) October 31, 2026 16:48

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Fix incorrect workspace details on case-insensitive hosts

5e5788f

Co-authored-by: jakebailey <5341706+jakebailey@users.noreply.github.com>

Copilot finished work on behalf of Jake Bailey (jakebailey) October 31, 2026 17:07

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Fix call hierarchy file node paths - #64108

Fix call hierarchy file node paths#64108
Ryan Cavanaugh (RyanCavanaugh) with Copilot wants to merge 5 commits into
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