I said I was done, but is there any chance that th...

# gradle

[xenoterracide]

I said I was done, but is there any chance that this is a bug in the dsl? using groovy I could just pass a string, and that could be null as long as I wasn't trying to publish

publishing {
    repositories {
        maven {
            url = uri(System.getenv("JRS_S3_URI") ?: "" )

[gildor]

what exactly your problem is?

[gildor]

If null is fine for groovy, it should be fine for kotlin

[gildor]

but you shouldn’t pass “” to uri

[xenoterracide]

I guess i'm just finding it weird that now I have to do the null check, where in groovy it was fine to just pass the null or a string, and it would only complain if it was missing at publish, and since publish is a ci task https://bitbucket.org/xenworks/util/src/d83084173dbe91bdcf9e658a93091162a7402cc7/build.gradle?at=master&fileviewer=file-view-default

[gildor]

maybe you need:
url = System.getenv("JRS_S3_URI")?.run { uri(this) }

[gildor]

just because groovy implicitly creates uri for you

[gildor]

because you definitely shouldn’t pass empty string to uri() constructor, because empty string is invalid uri

[xenoterracide]

right, that's what I thought, let me try that string

[gildor]

or if you need less tricky code just:

val s3Uri = System.getenv("JRS_S3_URI")
url = if (s3Uri == null) null else uri(s3Uri)

[xenoterracide]

how exactly does that magic work? not the second one the first where does ?.run come from?

[gildor]

it’s Kotlin stdlib function

[gildor]

?. - means do not call anything after . if expression before ? is null
run - mens: get receiver object as context (this) and return result of lambda, so run converts string to uri. If there is null instead of string just return null

[gildor]

There is a few articles that explains those functions
https://android.jlelse.eu/mastering-kotlin-standard-functions-run-with-let-also-and-apply-9cd334b0ef84

[gildor]

.run and .let very similar, run gets receiver as this but let gets receiver as first lambda argument

[xenoterracide]

idea is warning me on the return that argument may not be null in java but may be null in kotlin

[xenoterracide]

weird

[xenoterracide]

I "think" that's on the url

[gildor]

Because uri returns platform type (null or non-null) I suppose

[gildor]

Could you show screenshot of warning?

[xenoterracide]

C:\Users\xeno\Desktop\2017-12-21 02_24_56-.png

[xenoterracide]

hmm

[gildor]

If you don’t need publishing config if you not provide publishing environment varialbes, just use if:

val publishConigAvailable = System.getenv('JRS_S3_URI') != null
If (publishConigAvailable) {
    publishing {
    ...
    }

}

[xenoterracide]

could work, though I try to avoid too much logic in build scripts, this run seems to work well enough

[gildor]

yes. but you actually have different logic depending on evironment variables

[gildor]

in our case we use the same approach, add publishing configs only when publishing env variables available

[xenoterracide]

System.getenv("JRS_S3_URI")?.let {
    val sourcesJar by tasks.creating(Jar::class) {
        classifier = "sources"
        from(java.sourceSets["main"].allSource)
    }

    publishing {
        repositories {
            maven {
                url = uri(it)

                credentials(AwsCredentials::class.java) {
                    accessKey = System.getenv("JRS_ACCESSKEYID")
                    secretKey = System.getenv("JRS_SECRETACCESSKEY")
                }
            }
        }
        (publications) {
            "mavenJava"(MavenPublication::class) {
                from(components["java"])
                artifact(sourcesJar)
            }
        }
    }
}

going with this, presuming it's effectively the same