Support pinning to latest of version of a node version

[fieldju]

Right now I have the following

node {
  version = '10.16.3'
  download = true
}

I would like to pin to https://nodejs.org/dist/latest-v10.x

node {
  version = 'latest-v10.x'
  download = true
}

When I do I get the following error

* What went wrong:
Execution failed for task ':cerberus-dashboard:nodeSetup'.
> Could not resolve all files for configuration ':cerberus-dashboard:detachedConfiguration1'.
   > Could not find org.nodejs:node:latest-v10.x.
     Searched in the following locations:
       - https://nodejs.org/dist/vlatest-v10.x/node-vlatest-v10.x-darwin-x64.tar.gz
     Required by:
         project :cerberus-dashboard

[deepy]

You could work around this by setting distBaseUrl to null and adding the repository manually, but you still wouldn't be able to say version = 'latest-v10.x' atleast not if I look at https://nodejs.org/dist/latest-v10.x which has artifacts named like node-v10.17.0-linux-x64.tar.gz.

But if you're ok with version = 10.17.0 and distBaseUrl = null you can copy the repository part from here https://github.com/node-gradle/gradle-node-plugin/blob/master/src/main/groovy/com/moowork/gradle/node/task/SetupTask.groovy#L180-L198

You need the useMetadataSourcesRepository part if you're on Gradle >= 4.5 and usePatternLayout if >= 5.0

[deepy]

We could probably do version detection from the SHASUMS256.txt file and that way support something like version = '10.+', but then we'd have to create our own repository instead of making use of the configurable nature of IvyArtifactRepository

[deepy]

There's a perfect component for this: ComponentMetadataVersionLister, so I figured I might as well give it a try and the following rough sketch works as expected.

So even though I have a personal grudge against dynamic versions this might be supported in the future :-) But for now if you're feeling brave you can clean the below snippet

public class SpecificListener implements ComponentMetadataVersionLister {

    @Override
    void execute(ComponentMetadataListerDetails details) {
        println details.getModuleIdentifier()
        if (details.moduleIdentifier.group == "org.nodejs" && details.moduleIdentifier.name == "node") {
            try {
                def url = new URL("https://nodejs.org/dist/latest-v10.x/SHASUMS256.txt").text
                if (url) {
                    def versions = url.lines()
                        .map { str -> return str  .replace("  ", " ")
                                                        .split(" ")[1]
                                    ?.substring(6)
                                    ?.replaceFirst(/(\.tar)?\.[a-zA-Z]*$/, "")
                                    ?.split("-")[0] }
                        .filter { !it.contains("/") }
                        .collect(Collectors.toSet())
                    details.listed(versions.toList())
                }
            } catch (Exception e) {
                println "Exception!"
                e.printStackTrace()
            }
        }
    }
}


repositories.ivy {
    setUrl('https://nodejs.org/dist/latest-v10.x/')
    patternLayout {
        artifact("[artifact](-v[revision]-[classifier]).[ext]")
    }
    metadataSources {
        artifact()
    }
    setComponentVersionsLister(SpecificListener)
}

node {
    distBaseUrl = null
    version = '10.+'
}