How to support different variants of the same project

[ZhaoXiangXML]

I'm working on a project which is used by multiple clients, they want different features and some of them has purchased the source code.

I can't just publish different binaries to them. I'd like to manage the release process with semantic-release.

Right now I've different branch for each client, they contains different commits but most commits are the same.

I've tried the channel setting, having two release branches with different channels, but it appears I can't release the second branch if it does not contain all commits of the first.

My (not working) branches setting looks like this:

"branches": [
    "+([0-9])?(.{+([0-9]),x}).x",
    "release",
    {
      "name": "beta",
      "prerelease": true
    },
    {
      "name": "alpha",
      "prerelease": true
    },
    {
      "name": "client-a-alpha",
      "channel": "client-a",
      "prerelease": true
    },
    {
      "name": "client-a-beta",
      "channel": "client-a",
      "prerelease": true
    },
    {
      "name": "client-a-release",
      "channel": "client-a"
    }
  ],