docs: setup_extract.ps1

setup_extract.ps1

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+param([string]$OutDir = "")
+$ErrorActionPreference = "Stop"
+$ScriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
+$TarName = "DressCode.tar"
+$TarPath = Join-Path $ScriptDir $TarName
+if (-not $OutDir) { $OutDir = Join-Path $ScriptDir "data\DressCode" }
+
+function Join-Parts([string]$OutFile) {
+    $parts = Get-ChildItem -Path ($OutFile + ".part*") -EA SilentlyContinue | Sort-Object Name
+    if (-not $parts -or $parts.Count -eq 0) { return $false }
+    Write-Host "==> Joining $($parts.Count) parts -> $OutFile"
+    if (Test-Path $OutFile) { Remove-Item $OutFile -Force }
+    $fs = [System.IO.File]::Open($OutFile, 'Create')
+    try {
+        foreach ($p in $parts) {
+            Write-Host "  + $($p.Name)"
+            $src = [System.IO.File]::OpenRead($p.FullName)
+            try { $src.CopyTo($fs) } finally { $src.Dispose() }
+        }
+    } finally { $fs.Dispose() }
+    return $true
+}
+
+if (-not (Test-Path $TarPath)) {
+    if (-not (Join-Parts $TarPath)) { Write-Error "Missing $TarPath / parts" }
+}
+
+$parent = Split-Path -Parent $OutDir
+New-Item -ItemType Directory -Force -Path $parent | Out-Null
+Write-Host "==> Extracting $TarName -> $parent"
+& tar.exe -xf $TarPath -C $parent
+if ($LASTEXITCODE -ne 0) { throw "tar extract failed" }
+
+$Root = $OutDir
+foreach ($c in @((Join-Path $parent "DressCode"), (Join-Path $OutDir "DressCode"), $OutDir)) {
+    if (Test-Path (Join-Path $c "dresses")) { $Root = $c; break }
+}
+$missing = $false
+foreach ($n in @("dresses", "upper_body", "lower_body")) {
+    if (-not (Test-Path (Join-Path $Root $n))) { Write-Host "  MISSING: $n"; $missing = $true }
+    else { Write-Host "  OK: $n" }
+}
+if ($missing) { throw "layout check failed" }
+Write-Host "==> Done. Dataset root: $Root"