Installation via brew fails on M1 Macs

Trying to install the latest bloop via Homebrew on a M1 MBP fails:

➜ brew install scalacenter/bloop/bloop
==> Installing bloop from scalacenter/bloop
==> Downloading https://github.com/scalacenter/bloop/releases/download/v1.4.8/ba
Already downloaded: /Users/moritz/Library/Caches/Homebrew/downloads/15b656d402cb87c13fcd6b5ed9a4fa4844dc7a8bfd053e3dd8436e081d2827d3--bash-completions
==> Downloading https://github.com/scalacenter/bloop/releases/download/v1.4.8/zs
Already downloaded: /Users/moritz/Library/Caches/Homebrew/downloads/8097faaab156e49489f66095321e47efcbf6eb834af7fb6812db66aa24445af4--zsh-completions
==> Downloading https://github.com/scalacenter/bloop/releases/download/v1.4.8/fi
Already downloaded: /Users/moritz/Library/Caches/Homebrew/downloads/0f402fb7013984ff25db8a5a4ee5a8ac7030ae895220f5a49af243352a97e603--fish-completions
==> Downloading https://github.com/scalacenter/bloop/releases/download/v1.4.8/bl
Already downloaded: /Users/moritz/Library/Caches/Homebrew/downloads/34257445775368b19ca13cd407ed295836d269ffbfdf750d1492bd60cbffeac0--bloop-coursier.json
==> coursier install --install-dir bin --default-channels=false --channel channe
Last 15 lines from /Users/moritz/Library/Logs/Homebrew/bloop/01.coursier:
Downloading https://github.com/shyiko/jabba/raw/master/index.json
Downloaded https://github.com/shyiko/jabba/raw/master/index.json
Exception in thread "main" coursier.jvm.JvmCache$JvmNotFoundInIndex: JVM graalvm:19.3 not found in index: No JVM found for OS darwin and CPU architecture arm64
	at coursier.jvm.JvmCache.$anonfun$getIfInstalled$2(JvmCache.scala:101)
	at coursier.jvm.JvmCache.$anonfun$getIfInstalled$2$adapted(JvmCache.scala:100)
	at coursier.util.Task$.$anonfun$flatMap$extension$1(Task.scala:14)
	at coursier.util.Task$.$anonfun$flatMap$extension$1$adapted(Task.scala:14)
	at coursier.util.Task$.wrap(Task.scala:84)
	at coursier.util.Task$.$anonfun$flatMap$2(Task.scala:14)
	at scala.concurrent.Future.$anonfun$flatMap$1(Future.scala:307)
	at scala.concurrent.impl.Promise.$anonfun$transformWith$1(Promise.scala:41)
	at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:64)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
	at java.base/java.lang.Thread.run(Thread.java:831)

[rosysalt]

I was able to install bloop a couple of days ago on Apple M1 chip. Below are the steps, in case it’s helpful for someone:

1. Install GraalVM CE 22.2.0-dev build
2. Install bloop with Coursier

Step 1: Install GraalVM CE 22.2.0-dev build

Graal introduced a support for Apple M1 in version 22.2. As of today, that version is still in the dev status. Hence I downloaded that version from the graalvm latest dev releases

I downloaded graalvm-ce-java11-darwin-aarch64-dev.tar.gz, but I think java17 should work as well.

Then follow the Installation on macOS Platforms

After that, I should see:

 >> java -version
openjdk version "11.0.16" 2022-07-19
OpenJDK Runtime Environment GraalVM CE 22.2.0-dev (build 11.0.16+5-jvmci-22.2-b03)
OpenJDK 64-Bit Server VM GraalVM CE 22.2.0-dev (build 11.0.16+5-jvmci-22.2-b03, mixed mode)

Step 2: Install bloop

cs install bloop

And then I have this:

 >> bloop about
bloop v1.5.0-18-003e6c7b

Using Scala v2.12.15 and Zinc v1.6.0
Running on Java JDK v11.0.16 (/Library/Java/JavaVirtualMachines/graalvm-ce-java11-22.2.0-dev/Contents/Home)
  -> Supports debugging user code, Java Debug Interface (JDI) is available.
Maintained by the Scala Center and the community.

[arixmkii]

And update on another issue, that JDK can’t be located in index. It is because for 22.1.0 default graalvm tag is not populated, only these are available in index:

      "jdk@graalvm-java11": {
        "22.1.0": "tgz+https://github.com/graalvm/graalvm-ce-builds/releases/download/vm-22.1.0/graalvm-ce-java11-darwin-aarch64-22.1.0.tar.gz"
      },
      "jdk@graalvm-java17": {
        "22.1.0": "tgz+https://github.com/graalvm/graalvm-ce-builds/releases/download/vm-22.1.0/graalvm-ce-java17-darwin-aarch64-22.1.0.tar.gz"
      },

And here is coursier issue, that states, that currently tag is hardcoded https://github.com/coursier/coursier/issues/1789#issuecomment-658185317

So, I needed a workaround of my own index.json with content:

{
  "darwin": {
    "arm64": {
      "jdk@graalvm": {
        "22.1.0": "tgz+https://github.com/graalvm/graalvm-ce-builds/releases/download/vm-22.1.0/graalvm-ce-java17-darwin-aarch64-22.1.0.tar.gz"
      }
    }
  }
}