fix(host): cancellable listing scans and O(log window) insertion
capability.list gains an optional AbortSignal threaded from the RPC carrier's request signal (the pickDirectory pattern): a disconnected or timed-out caller stops the opendir loop instead of the scan outliving its caller, and the abort surfaces as its own reason rather than a directory-unreadable dressing. boundedInsert rejects a full window's at-or-beyond-tail candidate on one comparison and binary-inserts retained candidates, so an oversized level no longer pays a window scan per dirent.
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@@ -172,9 +172,9 @@ const BROWSE_STUB: DirectoryPickerCapability = {
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describe('host.listDirectory / host.createDirectory', () => {
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it('serves listings and creation through the browse capability, defaulting to home', async () => {
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const { api } = await harness(undefined, BROWSE_STUB)
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const home = await api.host.listDirectory(request({}))
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const home = await api.host.listDirectory(request({}), new AbortController().signal)
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expect(home.result).toMatchObject({ ok: true, value: { path: '/home/user', home: '/home/user' } })
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const listed = await api.host.listDirectory(request({ path: '/home/user/projects' }))
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const listed = await api.host.listDirectory(request({ path: '/home/user/projects' }), new AbortController().signal)
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expect(listed.result).toMatchObject({ ok: true, value: { path: '/home/user/projects' } })
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const created = await api.host.createDirectory(request({ path: '/home/user', name: 'fresh' }))
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expect(created.result).toEqual({ ok: true, value: { path: '/home/user/fresh' } })
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@@ -182,7 +182,7 @@ describe('host.listDirectory / host.createDirectory', () => {
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it('maps typed picker failures onto the wire error codes and folds unknown throws to internal', async () => {
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const { api } = await harness(undefined, BROWSE_STUB)
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expect((await api.host.listDirectory(request({ path: '/denied' }))).result).toMatchObject({
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expect((await api.host.listDirectory(request({ path: '/denied' }), new AbortController().signal)).result).toMatchObject({
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ok: false, error: { code: 'directory-unreadable', details: { path: '/denied' } },
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})
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expect((await api.host.createDirectory(request({ path: '/home/user', name: 'taken' }))).result).toMatchObject({
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@@ -195,7 +195,7 @@ describe('host.listDirectory / host.createDirectory', () => {
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it('refuses the browse RPCs under a native composition', async () => {
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const { api } = await harness()
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expect((await api.host.listDirectory(request({}))).result).toMatchObject({
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expect((await api.host.listDirectory(request({}), new AbortController().signal)).result).toMatchObject({
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ok: false, error: { code: 'directory-picker-unavailable', details: { capability: 'native' } },
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})
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expect((await api.host.createDirectory(request({ path: '/x', name: 'y' }))).result).toMatchObject({
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