Update builder to use GraalVM 19 release (#4)

* bump to release version of graal & see what breaks

GraalVM was released, and it looks like there were quite a few API
changes from the latest "release candidate" to the release version --
including the removal of native-image from the default install. I guess
they don't really get the concept of a release candidate... well, lets
start by just bumping the version number and seeing what breaks as a
starting point.

* fix: metadata checksum issue with ol7_developer

appears to be entirely unrelated to the other upgrades we are doing now,
but necessary to get things working again until the oracle servers get
their act back together?

* restore native-image in docker builder

* graalvm download archive file URL path changes

archive files have swapped positioning of platform<->version, and macOS
has reverted back to using less userfriendly "darwin" identifier.

* ci: immediately exit in build on error

apparently azure CI treats scripts like.. actual scripts! which means
we need set -e to have a command exit halt everything.

* ci: gu install native-image

lets see if this puts things where it should go or requires some PATH
manipulation.  fingers crossed.

Dockerfile

@@ -3,19 +3,24 @@
 #
 # Also see regarding potential future built-in native target support:
 # https://github.com/scalameta/scalafmt/issues/1172
-FROM oracle/graalvm-ce:1.0.0-rc16 as builder
+FROM oracle/graalvm-ce:19.0.0 as builder
 ARG SCALAFMT_VERSION=v2.0.0-RC7
 
 WORKDIR /root
 
 # install sbt
 RUN curl https://bintray.com/sbt/rpm/rpm \
     -o /etc/yum.repos.d/bintray-sbt-rpm.repo && \
-    yum install -y sbt
+    yum --disablerepo=ol7_developer install -y sbt
+    # ^^ temporary fix for upstream repository issue, TODO: remove me later
+    # yum install -y sbt
 
 # other tools needed
 RUN yum install -y git zlib-static
 
+# native-image is no longer bundled with graalvm :-/
+RUN gu install native-image
+
 # get the source for the version of scalafmt we want
 RUN git clone https://github.com/scalameta/scalafmt \
     --branch ${SCALAFMT_VERSION} --single-branch

azure-pipelines.yml

@@ -4,7 +4,7 @@
 
 variables:
   scalafmt_version: v2.0.0-RC7
-  graalvm_version: 1.0.0-rc16
+  graalvm_version: '19.0.0'
 
 trigger:
   branches:
@@ -48,7 +48,7 @@ jobs:
 - template: ci/native-build.yml
   parameters:
     name: BuildNative_macOS
-    platform: macOS-amd64
+    platform: darwin-amd64
     vmImage: macOS-10.14
     binPath: Contents/Home/bin
 
@@ -69,7 +69,7 @@ jobs:
       targetPath: $(Build.ArtifactStagingDirectory)
   - task: DownloadPipelineArtifact@0
     inputs:
-      artifactName: dist_macOS-amd64
+      artifactName: dist_darwin-amd64
       targetPath: $(Build.ArtifactStagingDirectory)
   - script: ls -lh $(Build.ArtifactStagingDirectory)
   - task: GithubRelease@0

ci/native-build.yml

@@ -21,12 +21,17 @@ jobs:
       artifactName: jar
       targetPath: $(System.DefaultWorkingDirectory)
   - script: |
-      curl -fsL https://github.com/oracle/graal/releases/download/vm-$(graalvm_version)/graalvm-ce-${GRAALVM_VERSION}-${PLATFORM}.tar.gz \
+      curl -fsL https://github.com/oracle/graal/releases/download/vm-$(graalvm_version)/graalvm-ce-${PLATFORM}-${GRAALVM_VERSION}.tar.gz \
         --output graalvm.tgz
       tar xzf graalvm.tgz && rm -rf graalvm.tgz
       mv graalvm-ce-$(graalvm_version) graalvm
     displayName: Install GraalVM
   - script: |
+      set -e
+      ./graalvm/${BIN_PATH}/gu install native-image
+    displayName: Install native-image
+  - script: |
+      set -e
       JAVA_OPTS="-Xmx=2g" ./graalvm/${BIN_PATH}/native-image \
         ${BUILD_FLAGS} \
         --no-fallback \