Deployment using Git Branch in Stack Name

[slpenza]

I'm trying to create one set of stacks per environment based on the Git branch name. Apologies if this is more of a CodeBuild question than a CDK question. Please let me know if there is a more appropriate forum.

In "package.json" i'm populating a context variable w/ the branch name
"scripts": {
"cdk": "cdk --context branch=$(git rev-parse --abbrev-ref HEAD)"
},

The CDK generates the following static CodeBuild build command using the context variable:
npm run cdk synth --context branch=STAGE -- -o dist

When CodeBuild executes the build, setting the context variable in "package.json" takes priority over the build command resulting the following error:
throw new Error("'branch' parameter cannot be an empty string");

Creating a new "scripts" alias called "cdk-codebuild" w/o the context param, fails when attempting to retrieve the context value:
[Container] 2022/06/27 19:36:15 Running command npm run cdk-codebuild synth --context branch=STAGE -- -o dist
buildEnvironment(app.node.tryGetContext('branch').toUpperCase())
TypeError: Cannot read property 'toUpperCase' of undefined

Is there a recommended solution? Thanks

[slpenza]

In case it helps anyone else, I set the branch name to a CodeBuild environment variable and only rely on "context" when synthesizing locally. Does seem like a workaround but maybe not.

// get environment from context when local or environment variable through CodeBuild
try {
  var environment = app.node.tryGetContext('branch') || process.env.ENVIRONMENT
} catch (e) {
  console.log("Verify you're using 'npm run cdk' when executing locally")
}