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substitution is something the Spring framework does when reading its configuration for example. it is not a feature of properties files.

right, I think I've seen something else that does it though too (maven?). The question is whether gradle supports it. I'm guessing from your answer, the answer is no

You can set arbitrary Gradle properties via environment variables by prefixing the environment variable name with `ORG_GRADLE_PROJECT_`. So `export ORG_GRADLE_PROJECT_foo=bar` sets the `foo` Gradle property to `bar`.

yeah, but I was trying to avoid the value being on the cli, credentials, see previous rant (dear gh, why you putting them in the env), neways... might as well just access the env vars in the kts...

I mean, I guess I could... do it that way because it'd be ORG_GRADLE_PROJECT... = GH..

probably makes my build more verbose than is beneficial though

Are you talking about GH workflows? I simply do e.g.
```        env:
          ORG_GRADLE_PROJECT_mavenCentralUsername: ${{ secrets.OSSRH_USERNAME }}```
there.

yeah, definitely an option, in this case I'm (at least starting) publishing to githubs own package repo stuff, which uses

```        username = System.getenv("GITHUB_ACTOR")
        password = System.getenv("GITHUB_TOKEN")```


I guess it's a question of "which file"...

no reason to actually use their publishing template

```publishing {
    repositories {
        maven("<https://maven.pkg.github.com/foo/bar|https://maven.pkg.github.com/foo/bar>") {
            name = "GitHubPackages"
           credentials(PasswordCredentials::class)
        }
    }
}
```
```env:
  ORG_GRADLE_PROJECT_GitHubPackagesUsername: ${{ github.actor }}
  ORG_GRADLE_PROJECT_GitHubPackagesPassword: ${{ secrets.GITHUB_TOKEN }}```

right, but is that better for some reason?

Not trying to argue just kind of on the fence and trying to think about whether one is better than the other for some reason or another