Add Create-DMG ci script

Author: CrSjimo

scripts/ci/Create-DMG.ps1

@@ -0,0 +1,112 @@
+param (
+    [Parameter(Mandatory)]
+    [string]$AppPath,
+
+    [Parameter(Mandatory)]
+    [string]$Semver,
+
+    [Parameter(Mandatory)]
+    [string]$ApplicationDisplayName,
+
+    [Parameter(Mandatory)]
+    [string]$InstallerFileBase
+)
+
+$BackgroundSrcDir = "src/app/share/dmg"
+
+$Bg1x = Join-Path $BackgroundSrcDir "dmg_background.png"
+$Bg2x = Join-Path $BackgroundSrcDir "dmg_background@2x.png"
+
+if (!(Test-Path $Bg1x) -or !(Test-Path $Bg2x)) {
+    throw "dmg_background.png and dmg_background@2x.png do not exist in $BackgroundSrcDir"
+}
+
+if (!(Test-Path $AppPath)) {
+    throw "App bundle not exist: $AppPath"
+}
+
+# Temporary directory
+$TempDir = Join-Path ([System.IO.Path]::GetTempPath()) ("dmg-build-" + [System.Guid]::NewGuid())
+New-Item -ItemType Directory -Path $TempDir | Out-Null
+
+$Bg1xOut = Join-Path $TempDir "dmg_background.png"
+$Bg2xOut = Join-Path $TempDir "dmg_background@2x.png"
+$BgTiff  = Join-Path $TempDir "dmg_background.tiff"
+
+$VersionText = "Version $Semver"
+
+try {
+    # -----------------------------
+    # Step 1: Preprocess background
+    # -----------------------------
+
+    # 1x image
+    & magick `
+        "$Bg1x" `
+        -gravity south `
+        -pointsize 12 `
+        -fill "rgba(37,37,37,0.25)" `
+        -annotate +0+8 "$VersionText" `
+        "$Bg1xOut" | Write-Host
+
+    if ($LASTEXITCODE -ne 0) {
+        throw "ImageMagick failed to process dmg_background.png"
+    }
+
+    # 2x image (scaled)
+    & magick `
+        "$Bg2x" `
+        -gravity south `
+        -pointsize 24 `
+        -fill "rgba(37,37,37,0.25)" `
+        -annotate +0+16 "$VersionText" `
+        "$Bg2xOut" | Write-Host
+
+    if ($LASTEXITCODE -ne 0) {
+        throw "ImageMagick failed to process dmg_background@2x.png"
+    }
+
+    # Combine into TIFF
+    & tiffutil `
+        -cathidpicheck `
+        "$Bg1xOut" `
+        "$Bg2xOut" `
+        -out "$BgTiff" | Write-Host
+
+    if ($LASTEXITCODE -ne 0) {
+        throw "tiffutil failed to create TIFF"
+    }
+
+    # -----------------------------
+    # Step 2: Build DMG
+    # -----------------------------
+    $DmgName = "$InstallerFileBase.dmg"
+    $DmgPath = Join-Path (Get-Location) $DmgName
+
+    if (Test-Path $DmgPath) {
+        Remove-Item $DmgPath -Force
+    }
+
+    <# TODO: create-dmg currently places hidden .background file to the right of the visible area, so we have to leave some space for the horizontal scroll bar #>
+    & create-dmg `
+        --volname "$ApplicationDisplayName" `
+        --background "$BgTiff" `
+        --window-size 600 448 `
+        --icon-size 128 `
+        --icon "$(Split-Path $AppPath -Leaf)" 132 280 `
+        --app-drop-link 468 280 `
+        "$DmgPath" `
+        "$AppPath" | Write-Host
+
+    if ($LASTEXITCODE -ne 0) {
+        throw "create-dmg failed"
+    }
+
+    Write-Output $DmgPath
+}
+finally {
+    # Cleanup temp files
+    if (Test-Path $TempDir) {
+        Remove-Item $TempDir -Recurse -Force
+    }
+}