add build script for windows

build.ps1

@@ -0,0 +1,52 @@
+$ErrorActionPreference = 'Stop'
+
+$ROOT = $PSScriptRoot
+$SHA = (git -C $ROOT rev-parse --short HEAD)
+$COMMIT_COUNT = [int](git -C $ROOT rev-list --count HEAD)
+
+function Build-App {
+  param([string]$App)
+
+  $pubspec = Join-Path $ROOT $App "pubspec.yaml"
+  if (-not (Test-Path $pubspec)) {
+    Write-Error "Not found: $pubspec"
+  }
+
+  $versionLine = Get-Content $pubspec | Select-String -Pattern '^\s*version:\s*' | Select-Object -First 1
+  if (-not $versionLine) {
+    Write-Error "No version line in $pubspec"
+  }
+  $line = $versionLine.Line
+  if ($line -match '^\s*version:\s*([^+\s]+)') {
+    $baseVersion = $Matches[1].Trim()
+  } else {
+    Write-Error "Could not parse version from: $line"
+  }
+
+  $buildName = "${baseVersion}-${SHA}"
+  $versionCode = 2000 + $COMMIT_COUNT
+  if ($App -eq "firka_wear") {
+    $versionCode += 1
+  }
+
+  Write-Host "Building $App : version $buildName (version code: $versionCode)"
+  Push-Location (Join-Path $ROOT $App)
+  try {
+    flutter pub get
+    dart run scripts/codegen.dart
+    flutter build appbundle --build-name="$buildName" --build-number="$versionCode" --verbose
+  } finally {
+    Pop-Location
+  }
+}
+
+$target = if ($args.Count -gt 0) { $args[0] } else { "all" }
+
+switch ($target) {
+  "firka"      { Build-App firka }
+  "firka_wear" { Build-App firka_wear }
+  "all"        { Build-App firka; Build-App firka_wear }
+  default      {
+    Write-Error "Usage: $MyInvocation.MyCommand.Name [firka|firka_wear|all]"
+  }
+}