Move stc from bintray to maven central

[oyvindberg]

Hey there.

Since bintray is shutting down this might be one of many to make this leap. The Scalablytyped converter, stc for short, had to move to maven central.

Do you think this proposed change is enough for coursier to start resolving from maven central if it was already installed from bintray?

Before this PR both maven central and bintray were specified in the channel file. Probably because it was originally resolved in bintray, coursier doesn't descend into the directories in maven central.

(beta30 is on bintray, beta31 is on maven central)

[oyvind:~] 9m54s 1 $ whereis stc
stc: /home/olvind/.local/share/coursier/bin/stc
[oyvind:~] 10m21s 1 $ stc --version
ScalablyTyped Converter (version 1.0.0-beta30)
[oyvind:~] 10m31s 1 $ cs update
... snip
Downloading https://dl.bintray.com/oyvindberg/converter/org/scala-lang/scala-library/maven-metadata.xml
Downloaded https://dl.bintray.com/oyvindberg/converter/org/scala-lang/scala-library/maven-metadata.xml
Downloading https://dl.bintray.com/oyvindberg/converter/org/scala-lang/scala-library/maven-metadata.xml.sha1
Downloaded https://dl.bintray.com/oyvindberg/converter/org/scala-lang/scala-library/maven-metadata.xml.sha1
Checking https://repo1.maven.org/maven2/
Checked https://repo1.maven.org/maven2/
Checking https://repo1.maven.org/maven2/org/
Checked https://repo1.maven.org/maven2/org/
Checking https://repo1.maven.org/maven2/org/scalablytyped/
Checked https://repo1.maven.org/maven2/org/scalablytyped/
Checking https://repo1.maven.org/maven2/org/scalablytyped/converter/
Checked https://repo1.maven.org/maven2/org/scalablytyped/converter/
Checking https://dl.bintray.com/oyvindberg/converter/
Checked https://dl.bintray.com/oyvindberg/converter/
Downloading https://dl.bintray.com/oyvindberg/converter/
Downloaded https://dl.bintray.com/oyvindberg/converter/
Checking https://dl.bintray.com/oyvindberg/converter/org/
Checked https://dl.bintray.com/oyvindberg/converter/org/
Downloading https://dl.bintray.com/oyvindberg/converter/org/
Downloaded https://dl.bintray.com/oyvindberg/converter/org/
Checking https://dl.bintray.com/oyvindberg/converter/org/scalablytyped/
Checked https://dl.bintray.com/oyvindberg/converter/org/scalablytyped/
Downloading https://dl.bintray.com/oyvindberg/converter/org/scalablytyped/
Downloaded https://dl.bintray.com/oyvindberg/converter/org/scalablytyped/
Checking https://dl.bintray.com/oyvindberg/converter/org/scalablytyped/converter/
Checked https://dl.bintray.com/oyvindberg/converter/org/scalablytyped/converter/
Downloading https://dl.bintray.com/oyvindberg/converter/org/scalablytyped/converter/
Downloaded https://dl.bintray.com/oyvindberg/converter/org/scalablytyped/converter/
Checking https://repo1.maven.org/maven2/org/scalablytyped/converter/cli_2.12/maven-metadata.xml
Checked https://repo1.maven.org/maven2/org/scalablytyped/converter/cli_2.12/maven-metadata.xml
Checking https://dl.bintray.com/oyvindberg/converter/org/scalablytyped/converter/cli_2.12/maven-metadata.xml
Checked https://dl.bintray.com/oyvindberg/converter/org/scalablytyped/converter/cli_2.12/maven-metadata.xml
Checking https://repo1.maven.org/maven2/org/scalablytyped/converter/cli_2.12/maven-metadata.xml
Checked https://repo1.maven.org/maven2/org/scalablytyped/converter/cli_2.12/maven-metadata.xml
Checking https://dl.bintray.com/oyvindberg/converter/org/scalablytyped/converter/cli_2.12/maven-metadata.xml
Checked https://dl.bintray.com/oyvindberg/converter/org/scalablytyped/converter/cli_2.12/maven-metadata.xml
[oyvind:~] 10m44s 1 $ stc --version
ScalablyTyped Converter (version 1.0.0-beta30)

I didn't know how to really test the update situation, but with install and this updated channel it works at least

cs install --default-channels=false  --channel ./apps/resources stc
...
Downloading https://repo1.maven.org/maven2/org/scalablytyped/converter/cli_2.12/1.0.0-beta31/cli_2.12-1.0.0-beta31.pom

[oyvindberg]

(a good idea for future improvement is to validate that all the json files are valid - my first commit was forgot to remove a , and the build was green)

[alexarchambault]

Thanks @oyvindberg!

[alexarchambault]

I believe it should still have worked with the former descriptor, that's odd. Might be a bug.

It's better nonetheless to remove the bintray repo from the descriptor, as it's useless now.

[alexarchambault]

I agree about validating the JSON files here. Ideally, we should check that they conform to the app descriptor schema, with no superfluous fields.

We could also require some new fields, like a description or a home page, or fill up home page ourselves from the CI here, using what's in the main dependency POM.