fix(desktop): hand-off hardening - fail-closed gates, truthful completion, progress UI, result surfacing

Review feedback on the #82328/#82366 hand-off, all four points plus the
missing progress GUI:

1. FAIL CLOSED. Both preflight gates aborted-open: a Desktop still alive
   after 30s proceeded anyway, and a shim locked after 20s proceeded
   with --force - both mutate a potentially locked install (the exact
   Access-denied brick class). Now: desktop-alive -> exit 4, nothing
   changed; shim-locked -> exit 5, nothing changed. Both relaunch the
   Desktop so the user is never stranded.

2. TRUTHFUL COMPLETION. `hermes update` treats a Desktop GUI build
   failure as non-fatal (warns, exits 0) - correct for CLI use, a lie
   for a Desktop-driven update that then relaunches the OLD exe as
   "success". The script now detects the warning in the update output,
   retries the build once (`hermes desktop --force-build --build-only`),
   and exits 6 with an honest message when it still fails.

3. MARKER OWNERSHIP. Cleanup now removes the marker only while OUR pid
   still owns it - a handoff partner that rewrote the marker keeps its
   claim (same rule as UpdateLock.release).

4. RESULT SURFACING. The script writes .hermes-update-result.json on
   every exit path (ok, exit_code, message, branch, finished_at). New
   electron/handoff-result.ts consumes it exactly once at the boot
   update-gate: success logs, failure shows a real dialog pointing at
   desktop-update-handoff.log. Stale (>30min) and malformed results are
   consumed silently. Previously a failed detached update was
   indistinguishable from "nothing happened" - the exact live report
   that triggered this work.

5. PROGRESS UI. The old Tauri updater showed a window; the script ran
   in a hidden console with zero feedback. It now shows a WinForms
   progress window (marquee bar + streaming log) pumped via DoEvents
   during the update; -NoUi keeps tests/headless sessions clean, and a
   WinForms-unavailable session degrades to log-only.

Also: subprocess execution moved from Start-Process (ExitCode
unreliably $null under PS 5.1 even with the Handle workaround -
observed live: happy path reported "failed (exit )") to
System.Diagnostics.Process with synchronous stdout pumping, which
keeps the UI alive and the exit code real.

E2E on a real Windows box, sandbox HERMES_HOME + compiled fake
hermes.exe, all five paths:
- happy: exit 0, result {ok:true, "Update complete."}
- shim held open via O_RDWR: exit 5, nothing mutated, honest result
- desktop pid alive (60s ping child): exit 4 after the 30s gate
- update exits 0 printing "Desktop build failed" + rebuild fails:
  exit 6, result names the stale build and the retry command
- foreign-owned marker: overwritten by step-0 claim, removed as owner;
  ownership check verified in the cleanup path
vitest 18/18 (5 new handoff-result tests), typecheck 3 projects clean,
eslint clean, PS 5.1 parse + footguns + ASCII-only clean.

Remaining known gap (deliberate): the full click-to-relaunch lifecycle
through a REAL Desktop build still needs one live Windows verification
after this lands - tracked in the PR body.
This commit is contained in:
Teknium
2026-08-09 01:18:41 -07:00
parent 3b08a0f9b5
commit 6495ef82f7
4 changed files with 397 additions and 76 deletions
@@ -0,0 +1,57 @@
import assert from 'node:assert/strict'
import fs from 'node:fs'
import os from 'node:os'
import path from 'node:path'
import { test } from 'vitest'
import { handoffResultPath, readAndConsumeHandoffResult } from './handoff-result'
function tempHome(): string {
return fs.mkdtempSync(path.join(os.tmpdir(), 'handoff-result-'))
}
function write(home: string, body: any) {
fs.writeFileSync(handoffResultPath(home), typeof body === 'string' ? body : JSON.stringify(body))
}
test('consumes and returns a fresh failure result', () => {
const home = tempHome()
write(home, { ok: false, exit_code: 6, message: 'rebuild failed', branch: 'main', finished_at: Math.floor(Date.now() / 1000) })
const result = readAndConsumeHandoffResult(home)
assert.ok(result)
assert.equal(result.ok, false)
assert.equal(result.exitCode, 6)
assert.equal(result.message, 'rebuild failed')
assert.equal(fs.existsSync(handoffResultPath(home)), false, 'result file must be consumed')
})
test('reports each result at most once', () => {
const home = tempHome()
write(home, { ok: true, exit_code: 0, message: 'done', branch: 'main', finished_at: Math.floor(Date.now() / 1000) })
assert.ok(readAndConsumeHandoffResult(home))
assert.equal(readAndConsumeHandoffResult(home), null)
})
test('discards stale results but still consumes the file', () => {
const home = tempHome()
write(home, { ok: false, exit_code: 5, message: 'old', branch: 'main', finished_at: Math.floor(Date.now() / 1000) - 3600 })
assert.equal(readAndConsumeHandoffResult(home), null)
assert.equal(fs.existsSync(handoffResultPath(home)), false)
})
test('malformed JSON is consumed silently', () => {
const home = tempHome()
write(home, '{nope')
assert.equal(readAndConsumeHandoffResult(home), null)
assert.equal(fs.existsSync(handoffResultPath(home)), false)
})
test('absent file returns null', () => {
assert.equal(readAndConsumeHandoffResult(tempHome()), null)
})
+71
View File
@@ -0,0 +1,71 @@
/**
* Consume the detached update hand-off's result file (#82328 follow-up).
*
* scripts/desktop-update.ps1 runs hidden/detached — the user never sees its
* console. It writes HERMES_HOME/.hermes-update-result.json on every exit
* path; the relaunched Desktop reads it exactly once on boot and surfaces
* failures (a silent failed update looks identical to "nothing happened",
* which is how the 2026-08-09 'closed the app then nothing' report was
* born). Read-and-delete so a result is reported at most once; results
* older than the freshness window are discarded unread (a stale file from a
* crashed relaunch chain must not resurface days later).
*/
import fs from 'fs'
import path from 'path'
export const HANDOFF_RESULT_MAX_AGE_MS = 30 * 60 * 1000
export interface HandoffResult {
ok: boolean
exitCode: number
message: string
branch: string
}
export function handoffResultPath(hermesHome: string): string {
return path.join(hermesHome, '.hermes-update-result.json')
}
export function readAndConsumeHandoffResult(
hermesHome: string,
{ now = Date.now, maxAgeMs = HANDOFF_RESULT_MAX_AGE_MS }: { now?: () => number; maxAgeMs?: number } = {}
): HandoffResult | null {
const file = handoffResultPath(hermesHome)
let raw: string
try {
raw = fs.readFileSync(file, 'utf8')
} catch {
return null
}
// Consume unconditionally — even a malformed/stale file must not be
// re-reported on every subsequent boot.
try {
fs.unlinkSync(file)
} catch {
// Best-effort; a locked file just gets consumed on the next boot.
}
let parsed: any
try {
parsed = JSON.parse(raw)
} catch {
return null
}
const finishedAt = Number(parsed?.finished_at)
if (!Number.isFinite(finishedAt) || now() - finishedAt * 1000 > maxAgeMs) {
return null
}
return {
ok: Boolean(parsed?.ok),
exitCode: Number.isFinite(Number(parsed?.exit_code)) ? Number(parsed.exit_code) : 1,
message: typeof parsed?.message === 'string' ? parsed.message : '',
branch: typeof parsed?.branch === 'string' ? parsed.branch : ''
}
}
+23
View File
@@ -121,6 +121,7 @@ import {
removeWorktree,
switchBranch
} from './git-worktree-ops'
import { readAndConsumeHandoffResult } from './handoff-result'
import {
ATTACHMENT_UPLOAD_DEFAULT_MAX_BYTES,
clampDataUrlReadMaxMb,
@@ -1803,6 +1804,28 @@ async function waitForUpdateToFinish() {
timeoutMs: UPDATE_WAIT_TIMEOUT_MS
})
// The detached hand-off script (scripts/desktop-update.ps1) runs hidden;
// its result file is the ONLY way the user learns a detached update
// failed. Consume it exactly once, here, right where boot passes the
// update gate — success gets a log line, failure gets a real dialog
// (previously a failed detached update was indistinguishable from
// "nothing happened").
try {
const result = readAndConsumeHandoffResult(HERMES_HOME)
if (result && result.ok) {
rememberLog(`[updates] detached update finished OK (branch ${result.branch})`)
} else if (result) {
rememberLog(`[updates] detached update FAILED (exit ${result.exitCode}): ${result.message}`)
dialog.showErrorBox(
'Hermes update did not finish',
`${result.message}\n\nDetails: ${path.join(HERMES_HOME, 'logs', 'desktop-update-handoff.log')}`
)
}
} catch (err) {
rememberLog(`[updates] could not read hand-off result: ${err.message}`)
}
if (outcome === 'clear') {
return false
}
+246 -76
View File
@@ -9,160 +9,330 @@
# published. In practice binaries go months stale and users hit long-fixed
# bugs on every update (the 2026-08-09 incident chain).
#
# This script inverts that: it lives in the repo checkout, so EVERY
# `hermes update` refreshes the very code that drives the next update. The
# Desktop spawns it detached (see resolveUpdateScriptHandoff in
# apps/desktop/electron/main.ts) and exits; only PowerShell itself -- an OS
# component -- is "frozen".
# This script lives in the repo checkout, so EVERY `hermes update` refreshes
# the very code that drives the next update. The Desktop spawns it through a
# `cmd start` wrapper (see wrapHandoffForDetachedConsole in
# apps/desktop/electron/updater-process.ts -- a bare detached+hidden
# powershell dies before -File runs) and exits; only PowerShell itself -- an
# OS component -- is "frozen".
#
# CONTRACT (keep in sync with apps/desktop/electron/main.ts):
# powershell -NoProfile -ExecutionPolicy Bypass -File scripts\desktop-update.ps1
# cmd /d /s /c start "" /min powershell -NoProfile -ExecutionPolicy Bypass
# -File scripts\desktop-update.ps1
# -InstallRoot <path> repo checkout (HERMES_HOME\hermes-agent)
# -Branch <ref> branch to update against
# -DesktopPid <pid> the Electron main process to wait out
# [-RelaunchExe <path>] Hermes.exe to start when done (omit = no relaunch)
# [-NoUi] headless (tests); default shows a progress window
# [-NoMarkerCleanup] leave .hermes-update-in-progress in place (tests)
#
# The Desktop pre-writes HERMES_HOME\.hermes-update-in-progress with THIS
# process's pid before quitting. Contracts that already exist make that safe:
# * hermes_cli/update_lock.py `acquire` treats a live marker owned by a
# process ANCESTOR as its own orchestrator -- our `hermes update` child
# adopts the claim instead of refusing (no HANDOFF_PID_ENV needed).
# * electron/update-marker.ts gates backend startup on the marker, so a
# relaunched Desktop parks instead of spawning a venv-locking backend
# into the update window.
# We delete the marker on every exit path; a crash self-heals via the
# 20-minute staleness ceiling both readers enforce.
# SAFETY POSTURE: both preflight gates FAIL CLOSED. A Desktop that never
# exits, or a venv shim that never unlocks, aborts the hand-off without
# mutating the install -- a skipped update is recoverable, a half-updated
# venv is not. Every exit path (success, abort, crash) writes
# .hermes-update-result.json for the relaunched Desktop to surface, and
# relaunches the Desktop so the user is never left stranded.
#
# Marker: we claim HERMES_HOME\.hermes-update-in-progress with OUR pid as
# step 0 (the wrapper cmd.exe pid the Desktop saw is useless -- it exits
# immediately). hermes_cli/update_lock.py's ancestry rule lets our
# `hermes update` child adopt the claim; electron/update-marker.ts parks a
# relaunched Desktop on it. Cleanup only removes the marker while WE still
# own it (a handoff partner that rewrote it keeps its claim).
param(
[Parameter(Mandatory = $true)][string]$InstallRoot,
[string]$Branch = "main",
[int]$DesktopPid = 0,
[string]$RelaunchExe = "",
[switch]$NoUi,
[switch]$NoMarkerCleanup
)
$ErrorActionPreference = "Continue"
$HermesHome = Split-Path -Parent $InstallRoot
$MarkerPath = Join-Path $HermesHome ".hermes-update-in-progress"
$LogPath = Join-Path $HermesHome "logs\desktop-update-handoff.log"
$LogDir = Join-Path $HermesHome "logs"
$LogPath = Join-Path $LogDir "desktop-update-handoff.log"
$ResultPath = Join-Path $HermesHome ".hermes-update-result.json"
$script:Ui = $null
function Write-HandoffLog([string]$Message) {
$line = "{0:yyyy-MM-ddTHH:mm:ssK} {1}" -f (Get-Date), $Message
try { Add-Content -LiteralPath $LogPath -Value $line -Encoding UTF8 } catch {}
Write-Host $line
if ($script:Ui) {
try {
$script:Ui.Box.AppendText($Message + "`r`n")
[System.Windows.Forms.Application]::DoEvents()
} catch {}
}
}
function Remove-Marker {
function Show-ProgressWindow {
if ($NoUi) { return }
try {
Add-Type -AssemblyName System.Windows.Forms | Out-Null
Add-Type -AssemblyName System.Drawing | Out-Null
$form = New-Object System.Windows.Forms.Form
$form.Text = "Hermes Update"
$form.Size = New-Object System.Drawing.Size(720, 420)
$form.StartPosition = "CenterScreen"
$form.ControlBox = $false
$form.TopMost = $true
$label = New-Object System.Windows.Forms.Label
$label.Text = "Updating Hermes -- do not close this window. Hermes restarts automatically when the update finishes."
$label.Dock = "Top"
$label.Height = 34
$label.Padding = New-Object System.Windows.Forms.Padding(8, 8, 8, 0)
$bar = New-Object System.Windows.Forms.ProgressBar
$bar.Style = "Marquee"
$bar.MarqueeAnimationSpeed = 30
$bar.Dock = "Top"
$bar.Height = 18
$box = New-Object System.Windows.Forms.TextBox
$box.Multiline = $true
$box.ReadOnly = $true
$box.ScrollBars = "Vertical"
$box.Dock = "Fill"
$box.Font = New-Object System.Drawing.Font("Consolas", 9)
$form.Controls.Add($box)
$form.Controls.Add($bar)
$form.Controls.Add($label)
$form.Show()
[System.Windows.Forms.Application]::DoEvents()
$script:Ui = [pscustomobject]@{ Form = $form; Box = $box }
} catch {
# Headless session / WinForms unavailable: degrade to log-only.
$script:Ui = $null
}
}
function Close-ProgressWindow {
if ($script:Ui) {
try { $script:Ui.Form.Close() } catch {}
$script:Ui = $null
}
}
function Write-Result([bool]$Ok, [int]$Code, [string]$Message) {
# Consumed (read + deleted) by the relaunched Desktop on boot so the
# user actually SEES how a detached update ended.
try {
$obj = @{
ok = $Ok
exit_code = $Code
message = $Message
branch = $Branch
finished_at = [int][double]::Parse((Get-Date -UFormat %s), [System.Globalization.CultureInfo]::InvariantCulture)
} | ConvertTo-Json -Compress
[System.IO.File]::WriteAllText($ResultPath, $obj)
} catch {}
}
function Remove-MarkerIfOwned {
if ($NoMarkerCleanup) { return }
try {
if (Test-Path -LiteralPath $MarkerPath) {
Remove-Item -LiteralPath $MarkerPath -Force -ErrorAction SilentlyContinue
Write-HandoffLog "removed update marker"
$firstLine = (Get-Content -LiteralPath $MarkerPath -TotalCount 1 -ErrorAction SilentlyContinue)
if ("$firstLine".Trim() -eq "$PID") {
Remove-Item -LiteralPath $MarkerPath -Force -ErrorAction SilentlyContinue
Write-HandoffLog "removed update marker (owned)"
} else {
Write-HandoffLog "leaving update marker: owned by pid '$firstLine', not us ($PID)"
}
}
} catch {}
}
function Start-DesktopRelaunch {
if ($RelaunchExe -and (Test-Path -LiteralPath $RelaunchExe)) {
Write-HandoffLog "relaunching desktop: $RelaunchExe"
try {
Start-Process -FilePath $RelaunchExe -WorkingDirectory (Split-Path -Parent $RelaunchExe) | Out-Null
} catch {
Write-HandoffLog "WARNING: desktop relaunch failed: $($_.Exception.Message)"
}
}
}
function Invoke-StreamedHermes([string]$Exe, [string[]]$HermesArgs, [string]$Tag) {
# Start-Process + output file + poll keeps the WinForms window pumping
# during long silent stretches (pip installs); a blocking pipeline would
# freeze the marquee. Returns @{ Code; Output }.
$outFile = Join-Path $env:TEMP ("hermes-handoff-{0}-{1}.out" -f $Tag, $PID)
$errFile = Join-Path $env:TEMP ("hermes-handoff-{0}-{1}.err" -f $Tag, $PID)
Remove-Item -LiteralPath $outFile, $errFile -Force -ErrorAction SilentlyContinue
# System.Diagnostics.Process directly: Start-Process's .ExitCode is
# unreliably $null under PS 5.1 even with the Handle-touch workaround.
$psi = New-Object System.Diagnostics.ProcessStartInfo
$psi.FileName = $Exe
# .Arguments string (PS 5.1 / .NET Framework has no ArgumentList).
# Args here are fixed flags + a branch ref; quote each defensively.
$psi.Arguments = ($HermesArgs | ForEach-Object { '"{0}"' -f ($_ -replace '"', '\"') }) -join ' '
$psi.UseShellExecute = $false
$psi.RedirectStandardOutput = $true
$psi.RedirectStandardError = $true
$psi.CreateNoWindow = $true
$proc = [System.Diagnostics.Process]::Start($psi)
$outWriter = [System.IO.File]::CreateText($outFile)
$errWriter = [System.IO.File]::CreateText($errFile)
# Pump synchronously in small reads so the UI stays alive; stderr is
# drained at the end (hermes update is stdout-dominant).
while (-not $proc.HasExited) {
while (-not $proc.StandardOutput.EndOfStream) {
$ln = $proc.StandardOutput.ReadLine()
if ($null -ne $ln) {
$outWriter.WriteLine($ln)
if ($ln.Trim()) { Write-HandoffLog ("{0}| {1}" -f $Tag, $ln) }
}
if ($script:Ui) { [System.Windows.Forms.Application]::DoEvents() }
}
Start-Sleep -Milliseconds 150
if ($script:Ui) { [System.Windows.Forms.Application]::DoEvents() }
}
while (-not $proc.StandardOutput.EndOfStream) {
$ln = $proc.StandardOutput.ReadLine()
if ($null -ne $ln) {
$outWriter.WriteLine($ln)
if ($ln.Trim()) { Write-HandoffLog ("{0}| {1}" -f $Tag, $ln) }
}
}
$errText = $proc.StandardError.ReadToEnd()
if ($errText) {
$errWriter.Write($errText)
foreach ($ln in ($errText -split "`r?`n")) {
if ($ln.Trim()) { Write-HandoffLog ("{0}!| {1}" -f $Tag, $ln) }
}
}
$outWriter.Close(); $errWriter.Close()
$proc.WaitForExit()
$code = $proc.ExitCode
$all = ""
try { $all = [System.IO.File]::ReadAllText($outFile) } catch {}
if ($errText) { $all += "`n" + $errText }
Remove-Item -LiteralPath $outFile, $errFile -Force -ErrorAction SilentlyContinue
return @{ Code = $code; Output = $all }
}
$finalCode = 1
$finalMsg = "update did not complete"
try {
New-Item -ItemType Directory -Path $LogDir -Force -ErrorAction SilentlyContinue | Out-Null
Remove-Item -LiteralPath $ResultPath -Force -ErrorAction SilentlyContinue
Show-ProgressWindow
Write-HandoffLog "hand-off start: root=$InstallRoot branch=$Branch desktopPid=$DesktopPid pid=$PID"
# -- 0. Claim the update marker with OUR pid ---------------------------
# The Desktop spawns us through a `cmd start` wrapper (a console-subsystem
# child needs its own console to survive the parent's exit), so the pid
# the Desktop observed is the short-lived cmd.exe -- useless as a marker
# owner. We claim it ourselves as step 0: `hermes update` (our child)
# adopts the claim via update_lock.py's process-ancestry rule, and a
# relaunched Desktop parks on it (update-marker.ts) instead of spawning a
# backend into the update window. Unix seconds + pid, same format as
# every other writer.
try {
$epoch = [int][double]::Parse((Get-Date -UFormat %s), [System.Globalization.CultureInfo]::InvariantCulture)
# WriteAllText for byte-exact LF framing: Set-Content/Add-Content emit
# CRLF, and the marker contract (Rust/TS/Python readers) is "<pid>\n<ts>\n".
# WriteAllText for byte-exact LF framing: Set-Content emits CRLF and
# the marker contract (Rust/TS/Python readers) is "<pid>\n<ts>\n".
[System.IO.File]::WriteAllText($MarkerPath, "$PID`n$epoch`n")
Write-HandoffLog "claimed update marker (pid $PID)"
} catch {
Write-HandoffLog "WARNING: could not write update marker: $($_.Exception.Message)"
}
# -- 1. Wait for the Desktop to actually exit -------------------------
# The Desktop quits right after spawning us, but Electron teardown is
# asynchronous. Bounded wait; a Desktop that never exits is a bug we
# surface rather than fight.
# -- 1. Wait for the Desktop to exit (FAIL CLOSED) ----------------------
if ($DesktopPid -gt 0) {
$deadline = (Get-Date).AddSeconds(30)
while ((Get-Date) -lt $deadline) {
$proc = Get-Process -Id $DesktopPid -ErrorAction SilentlyContinue
if (-not $proc) { break }
Start-Sleep -Milliseconds 300
if ($script:Ui) { [System.Windows.Forms.Application]::DoEvents() }
}
$still = Get-Process -Id $DesktopPid -ErrorAction SilentlyContinue
if ($still) {
Write-HandoffLog "WARNING: desktop pid $DesktopPid still alive after 30s; proceeding (hermes update has its own guards)"
} else {
Write-HandoffLog "desktop exited"
if (Get-Process -Id $DesktopPid -ErrorAction SilentlyContinue) {
# A live Desktop means a live backend re-locking the venv at any
# moment. Updating under it is how installs brick. Abort.
$finalCode = 4
$finalMsg = "Update aborted: the Hermes window (pid $DesktopPid) did not exit within 30s. Nothing was changed. Close Hermes fully and try again."
Write-HandoffLog $finalMsg
exit $finalCode
}
Write-HandoffLog "desktop exited"
}
# -- 2. Wait for the venv shim to unlock ------------------------------
# Mirrors the Rust updater's is_locked(): a running exe refuses O_RDWR.
# -- 2. Wait for the venv shim to unlock (FAIL CLOSED) ------------------
$shim = Join-Path $InstallRoot "venv\Scripts\hermes.exe"
if (Test-Path -LiteralPath $shim) {
$unlocked = $false
$deadline = (Get-Date).AddSeconds(20)
while ((Get-Date) -lt $deadline) {
try {
$fs = [System.IO.File]::Open($shim, 'Open', 'ReadWrite', 'None')
$fs.Close()
Write-HandoffLog "venv shim unlocked"
$unlocked = $true
break
} catch {
Start-Sleep -Milliseconds 400
if ($script:Ui) { [System.Windows.Forms.Application]::DoEvents() }
}
}
if (-not $unlocked) {
# Something still maps the venv. --force-ing past it guarantees a
# half-updated venv (the exact 2026-08-09 Access-denied brick).
$finalCode = 5
$finalMsg = "Update aborted: another process is still holding the Hermes install open (venv\Scripts\hermes.exe locked after 20s). Nothing was changed. Close other Hermes windows/terminals and try again."
Write-HandoffLog $finalMsg
exit $finalCode
}
Write-HandoffLog "venv shim unlocked"
}
# -- 3. Run the update from the CURRENT checkout ----------------------
# hermes update handles everything downstream: gateway pause, venv-holder
# guard (with orphan reap), dep sync, desktop rebuild, skills/config sync,
# gateway restart. --force skips only the hermes.exe shim guard, which by
# this point is provably unlocked (step 2); the venv-python holder guard
# stays active. Our marker claim is adopted by the child via the
# process-ancestry rule in hermes_cli/update_lock.py.
# -- 3. Run the update from the CURRENT checkout ------------------------
# --force skips only the hermes.exe shim guard, which step 2 just PROVED
# is unlocked; the venv-python holder guard (orphan reap included) stays
# active. Our marker claim is adopted by the child via update_lock.py's
# process-ancestry rule.
$hermesExe = Join-Path $InstallRoot "venv\Scripts\hermes.exe"
if (-not (Test-Path -LiteralPath $hermesExe)) {
Write-HandoffLog "ERROR: $hermesExe missing - install too broken for the script hand-off; falling back is the Desktop's job"
exit 3
$finalCode = 3
$finalMsg = "Update aborted: $hermesExe is missing. The install needs repair (run the Hermes installer or `hermes doctor`)."
Write-HandoffLog $finalMsg
exit $finalCode
}
Write-HandoffLog "running: hermes update --yes --gateway --force --branch $Branch"
& $hermesExe update --yes --gateway --force --branch $Branch 2>&1 | ForEach-Object {
Write-HandoffLog ("update| " + $_)
}
$updateExit = $LASTEXITCODE
Write-HandoffLog "hermes update exit code: $updateExit"
$updateArgs = @("update", "--yes", "--gateway", "--force", "--branch", $Branch)
Write-HandoffLog ("running: hermes " + ($updateArgs -join " "))
$res = Invoke-StreamedHermes $hermesExe $updateArgs "update"
Write-HandoffLog "hermes update exit code: $($res.Code)"
if ($updateExit -ne 0) {
if ($res.Code -ne 0 -and $res.Code -ne 2) {
# One retry for the update-boundary class (fresh code on disk, stale
# code in memory -- same rationale as the Tauri updater's retry).
# Skip for exit 2: "close all Hermes windows" is not retryable.
if ($updateExit -ne 2) {
Write-HandoffLog "first attempt failed; retrying once (freshly pulled fix loads on the second run)"
& $hermesExe update --yes --gateway --force --branch $Branch 2>&1 | ForEach-Object {
Write-HandoffLog ("update| " + $_)
}
$updateExit = $LASTEXITCODE
Write-HandoffLog "retry exit code: $updateExit"
}
# code in memory). Exit 2 ("close all Hermes windows") is not retryable.
Write-HandoffLog "first attempt failed; retrying once (freshly pulled fix loads on the second run)"
$res = Invoke-StreamedHermes $hermesExe $updateArgs "update"
Write-HandoffLog "retry exit code: $($res.Code)"
}
# -- 4. Relaunch the Desktop ------------------------------------------
# Marker must be gone BEFORE relaunch or the new Desktop parks on it.
Remove-Marker
if ($RelaunchExe -and (Test-Path -LiteralPath $RelaunchExe)) {
Write-HandoffLog "relaunching desktop: $RelaunchExe"
Start-Process -FilePath $RelaunchExe -WorkingDirectory (Split-Path -Parent $RelaunchExe) | Out-Null
# -- 4. Truthful completion: don't trust exit 0 -------------------------
# `hermes update` treats a Desktop GUI build failure as NON-fatal (prints
# a one-line warning, exits 0). For a Desktop-DRIVEN update that warning
# is fatal: we would relaunch the old exe and call it success. Detect it,
# retry the build once, and propagate honestly.
$desktopBuildFailed = $false
if ($res.Code -eq 0 -and $res.Output -match "Desktop build failed") {
Write-HandoffLog "hermes update reported a desktop build failure (non-fatal there, fatal here); retrying build"
$rebuild = Invoke-StreamedHermes $hermesExe @("desktop", "--force-build", "--build-only") "rebuild"
Write-HandoffLog "desktop rebuild exit code: $($rebuild.Code)"
if ($rebuild.Code -ne 0) { $desktopBuildFailed = $true }
}
exit $updateExit
if ($res.Code -eq 0 -and -not $desktopBuildFailed) {
$finalCode = 0
$finalMsg = "Update complete."
} elseif ($desktopBuildFailed) {
$finalCode = 6
$finalMsg = "Code and dependencies updated, but the Desktop app REBUILD FAILED - you are running the previous build. Run `hermes desktop --force-build` from a terminal to retry."
} else {
$finalCode = $res.Code
$finalMsg = "hermes update failed (exit $($res.Code)). See logs\desktop-update-handoff.log."
}
exit $finalCode
} finally {
Remove-Marker
Write-Result ($finalCode -eq 0) $finalCode $finalMsg
Remove-MarkerIfOwned
Close-ProgressWindow
Start-DesktopRelaunch
}