fix: strip extra fields out before creating snap.yaml (electron-userl…

…and#7104)

packages/app-builder-lib/src/targets/snap.ts

@@ -124,7 +124,6 @@ export default class SnapTarget extends Target {
       const archTriplet = archNameToTriplet(arch)
       appDescriptor.environment = {
         DISABLE_WAYLAND: options.allowNativeWayland ? "" : "1",
-        TMPDIR: "$XDG_RUNTIME_DIR",
         PATH: "$SNAP/usr/sbin:$SNAP/usr/bin:$SNAP/sbin:$SNAP/bin:$PATH",
         SNAP_DESKTOP_RUNTIME: "$SNAP/gnome-platform",
         LD_LIBRARY_PATH: [
@@ -214,6 +213,16 @@ export default class SnapTarget extends Target {
       return
     }
 
+    if (this.isUseTemplateApp) {
+      // remove fields that are valid in snapcraft.yaml, but not snap.yaml
+      delete snap.compression;
+      delete snap.contact;
+      delete snap.donation;
+      delete snap.issues;
+      delete snap['source-code'];
+      delete snap.website;
+    }
+
     await outputFile(path.join(snapMetaDir, this.isUseTemplateApp ? "snap.yaml" : "snapcraft.yaml"), serializeToYaml(snap))
 
     const hooksDir = await packager.getResource(options.hooks, "snap-hooks")