fix(ghostty-native): unpack zig bootstrap zips on windows

Author: Gaubee

packages/ghostty-native/build/build.sh

@@ -106,7 +106,15 @@ if [[ -z "$ZIG_BIN" ]]; then
       echo "  Bootstrapping Zig $ZIG_VERSION ($ZIG_ARCHIVE$ZIG_EXT)..."
       curl -L "https://ziglang.org/download/$ZIG_VERSION/$ZIG_ARCHIVE$ZIG_EXT" -o "$ARCHIVE_PATH"
       rm -rf "$RELEASE_ZIG_ROOT"
-      tar -xf "$ARCHIVE_PATH" -C /tmp
+      if [[ "$ZIG_EXT" == ".zip" ]]; then
+        # Git Bash tar does not reliably unpack Windows Zig zip archives.
+        ARCHIVE_PATH_WIN="$(cygpath -w "$ARCHIVE_PATH")"
+        TMP_DIR_WIN="$(cygpath -w /tmp)"
+        powershell.exe -NoProfile -Command \
+          "\$ErrorActionPreference = 'Stop'; Expand-Archive -LiteralPath '$ARCHIVE_PATH_WIN' -DestinationPath '$TMP_DIR_WIN' -Force"
+      else
+        tar -xf "$ARCHIVE_PATH" -C /tmp
+      fi
       mv "/tmp/$ZIG_ARCHIVE" "$RELEASE_ZIG_ROOT"
     fi
     ZIG_BIN="$RELEASE_ZIG_BIN"

packages/ghostty-native/test/package-boundary.test.ts

@@ -49,6 +49,9 @@ describe("Feature: ghostty-native package boundary", () => {
     expect(buildScript).toContain("https://ziglang.org/download/$ZIG_VERSION/");
     expect(buildScript).toContain('RELEASE_ZIG_ROOT="/tmp/zig-$ZIG_VERSION"');
     expect(buildScript).toContain("ghostty-vt minimal dependency graph");
+    expect(buildScript).toContain('if [[ "$ZIG_EXT" == ".zip" ]]; then');
+    expect(buildScript).toContain("Expand-Archive -LiteralPath");
+    expect(buildScript).toContain('ARCHIVE_PATH_WIN="$(cygpath -w "$ARCHIVE_PATH")"');
     expect(nativeBuild).toContain('root_source_file = b.path(".ghostty-src/src/lib_vt.zig")');
     expect(nativeBuild).toContain('build_options.addOption(bool, "simd", false)');
     expect(nativeBuild).toContain('terminal_options.add(b, ghostty_module)');