ensure rev sync

bin/update.ps1

@@ -3,6 +3,7 @@ $ErrorActionPreference = 'Stop'
 $ScriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
 $Root = Split-Path -Parent $ScriptDir
 $SingBox = Join-Path $Root 'works/sing-box'
+$RevFile = Join-Path $Root 'works/rev'
 
 # defaults
 $RepoUrl = 'git@git.inker.bot:arknights/sing-box.git'
@@ -34,6 +35,10 @@ if (Test-Path (Join-Path $SingBox '.git')) {
     }
 }
 
+$Rev = git -C $SingBox rev-parse HEAD
+Set-Content -Path $RevFile -Value $Rev -NoNewline
+
 $version = git -C $SingBox describe --tags --always 2>$null
-if (-not $version) { $version = git -C $SingBox rev-parse --short HEAD }
+if (-not $version) { $version = $Rev.Substring(0, 7) }
 Write-Host "Done. Version: $version"
+Write-Host "Stored rev: $Rev"