How can I contain my binary in prime/ folder

snapcraft
1

Hi. I’m a new snapcraft user maintaining an electron app and in charge of snapping in these days. However, I cannot snap my app well, so I want you to help with my snapping and publishing.

what I want to do

  1. build my app by grunt pre-build
  2. snap this app including the built binary
  3. the command asmstnote kicks running the built binary
  4. publish it without errors

I assume the built file should be located in prime folder, but I’m not sure how to do it.

Here’s my snapcraft.yaml

name: asmstnote # you probably want to 'snapcraft register <name>'
version: '0.1' # just for humans, typically '1.2+git' or '1.3.2'
summary: Single-line elevator pitch for your amazing snap # 79 char long summary
description: |
  This is my-snap's description. You have a paragraph or two to tell the
  most important story about your snap. Keep it under 100 words though,
  we live in tweetspace and your description wants to look good in the snap
  store.

grade: devel # must be 'stable' to release into candidate/stable channels
confinement: devmode # use 'strict' once you have the right plugs and slots

apps:
  asmstnote:
    command: desktop-launch $SNAP/start.wrapper
    plugs:
     - browser-support
     - network
     - unity7
     - gsettings
     # - home
     # - pulseaudio
     # - opengl

parts:
  src:
    plugin: nodejs
    source: .
    prepare: npm install grunt npm@5.2.0 -g && grunt pre-build

  deps:
    plugin: nil
    stage-packages:
      - libgconf-2-4
      - libnss3
      - libxss1
      - fontconfig-config

  desktop-integration:
    plugin: nil
    stage-packages:
      - libappindicator1
      - libdbusmenu-glib4
      - libnotify4
      - libunity9

  launcher:
    plugin: copy
    files:
      start: start.wrapper
    after: [desktop-glib-only]

Thank you in advance for your help.