msix: add release script to build MSIX packages

Add msix/release.sh to build MSIX packages for Git for Windows. The
script reuses the shared helpers from release-common.sh for argument
parsing, root directory setup, file list generation, and gitconfig
configuration.

MSIX-specific logic includes:
- Converting Git for Windows version strings to the X.X.X.X format
  required by MSIX (e.g. 2.47.1.windows.1 becomes 2.47.1.1)
- Generating asset images at build time from git-for-windows.svg using
  rsvg-convert, avoiding committed binary artifacts
- Locating makeappx.exe from the Windows SDK to produce the final
  .msix package

Signed-off-by: Shmueli Englard <shmueli.yosef@englard.net>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: shmuelie

msix/release.sh

@@ -0,0 +1,110 @@
+#!/bin/sh
+
+# Build the MSIX package for Git for Windows.
+
+. "$(dirname "$0")/../release-common.sh"
+
+case "$MSYSTEM" in
+MINGW32)  ARTIFACT_SUFFIX="x86";;
+MINGW64)  ARTIFACT_SUFFIX="x64";;
+CLANGARM64) ARTIFACT_SUFFIX=arm64;;
+esac
+
+# MSIX requires version in X.X.X.X format (numeric only)
+# Convert Git for Windows versions like "2.47.1.windows.1" to "2.47.1.1"
+# and test versions like "0-test" to "0.0.0.0"
+MSIX_VERSION="$(echo "$VERSION" | sed -e 's/\.windows\./\./' -e 's/[^0-9.]//g')"
+# Ensure we have exactly 4 numeric segments
+while test "$(echo "$MSIX_VERSION" | tr -cd '.' | wc -c)" -lt 3
+do
+	MSIX_VERSION="$MSIX_VERSION.0"
+done
+
+TARGET="$output_directory"/Git.GitforWindows_"$VERSION"_"$ARTIFACT_SUFFIX".msix
+
+# Generate MSIX asset images from SVG
+ASSETS_DIR="$SCRIPT_PATH/Assets"
+mkdir -p "$ASSETS_DIR" ||
+die "Could not create Assets directory"
+
+type rsvg-convert ||
+case "$ARCH" in
+i686) pacman -Sy --noconfirm mingw-w64-i686-librsvg;;
+x86_64) pacman -Sy --noconfirm mingw-w64-x86_64-librsvg;;
+aarch64) pacman -Sy --noconfirm mingw-w64-clang-aarch64-librsvg;;
+esac ||
+die "Could not install librsvg"
+
+SVG_SOURCE="$SCRIPT_PATH/../git-for-windows.svg"
+for spec in \
+	LockScreenLogo.png:24 \
+	LockScreenLogo.scale-200.png:48 \
+	Square150x150Logo.png:150 \
+	Square150x150Logo.scale-200.png:300 \
+	Square44x44Logo.png:44 \
+	Square44x44Logo.scale-200.png:88 \
+	Square44x44Logo.targetsize-24_altform-unplated.png:24 \
+	StoreLogo.png:50
+do
+	name="${spec%%:*}"
+	size="${spec##*:}"
+	rsvg-convert -w "$size" -h "$size" "$SVG_SOURCE" \
+		-o "$ASSETS_DIR/$name" ||
+	die "Could not generate $name"
+done
+
+prepare_root
+
+init_etc_gitconfig
+generate_file_list "$@"
+copy_dlls_to_libexec
+unpack_pdbs
+
+# Find makeappx.exe from the Windows SDK
+MAKEAPPX=
+for sdk_dir in "/c/Program Files (x86)/Windows Kits/10/bin"/*/
+do
+	case "$ARCH" in
+	x86_64) sdk_arch=x64;;
+	i686) sdk_arch=x86;;
+	aarch64) sdk_arch=arm64;;
+	esac
+	if test -f "$sdk_dir$sdk_arch/makeappx.exe"
+	then
+		MAKEAPPX="$sdk_dir$sdk_arch/makeappx.exe"
+	fi
+done
+test -n "$MAKEAPPX" ||
+die "Could not find makeappx.exe in the Windows SDK"
+
+# Create MSIX
+
+MAPFILE=$SCRIPT_PATH/root/files.map
+MANIFESTIN=$SCRIPT_PATH/appxmanifest.xml.in
+MANIFESTOUT=$SCRIPT_PATH/root/appxmanifest.xml
+
+echo "Create MSIX"
+
+sed -e "s/@@VERSION@@/$MSIX_VERSION/g" <"$MANIFESTIN" >"$MANIFESTOUT"
+
+echo "[Files]" >"$MAPFILE" &&
+echo "\"$(cygpath -aw "$SCRIPT_PATH")/root/appxmanifest.xml\" \"AppxManifest.xml\"" >>"$MAPFILE" &&
+echo "\"$(cygpath -aw "$SCRIPT_PATH")/root/bin/git.exe\" \"bin/git.exe\"" >>"$MAPFILE" &&
+echo "\"$(cygpath -aw "$SCRIPT_PATH")/root/bin/sh.exe\" \"bin/sh.exe\"" >>"$MAPFILE" &&
+echo "\"$(cygpath -aw "$SCRIPT_PATH")/root/bin/bash.exe\" \"bin/bash.exe\"" >>"$MAPFILE" &&
+echo "\"$(cygpath -aw "$SCRIPT_PATH")/Assets/LockScreenLogo.png\" \"Assets/LockScreenLogo.png\"" >>"$MAPFILE" &&
+echo "\"$(cygpath -aw "$SCRIPT_PATH")/Assets/LockScreenLogo.scale-200.png\" \"Assets/LockScreenLogo.scale-200.png\"" >>"$MAPFILE" &&
+echo "\"$(cygpath -aw "$SCRIPT_PATH")/Assets/Square150x150Logo.png\" \"Assets/Square150x150Logo.png\"" >>"$MAPFILE" &&
+echo "\"$(cygpath -aw "$SCRIPT_PATH")/Assets/Square150x150Logo.scale-200.png\" \"Assets/Square150x150Logo.scale-200.png\"" >>"$MAPFILE" &&
+echo "\"$(cygpath -aw "$SCRIPT_PATH")/Assets/Square44x44Logo.png\" \"Assets/Square44x44Logo.png\"" >>"$MAPFILE" &&
+echo "\"$(cygpath -aw "$SCRIPT_PATH")/Assets/Square44x44Logo.scale-200.png\" \"Assets/Square44x44Logo.scale-200.png\"" >>"$MAPFILE" &&
+echo "\"$(cygpath -aw "$SCRIPT_PATH")/Assets/Square44x44Logo.targetsize-24_altform-unplated.png\" \"Assets/Square44x44Logo.targetsize-24_altform-unplated.png\"" >>"$MAPFILE" &&
+echo "\"$(cygpath -aw "$SCRIPT_PATH")/Assets/StoreLogo.png\" \"Assets/StoreLogo.png\"" >>"$MAPFILE" &&
+MSYS_ROOT="$(cygpath -aw /)" &&
+echo "$LIST" | while IFS= read -r entry; do
+	winpath="${entry//\//\\}"
+	echo "\"$MSYS_ROOT\\$winpath\" \"$winpath\""
+done >>"$MAPFILE"
+
+MSYS_NO_PATHCONV=1 "$MAKEAPPX" pack /v /o /f "$(cygpath -aw "$MAPFILE")" /p "$(cygpath -aw "$TARGET")" &&
+echo "Package created at $TARGET"