Add GitHub Action for SDKMAN releases

.github/workflows/sdkman.yml

@@ -0,0 +1,88 @@
+name: Publish to SDKMAN!
+on:
+  release:
+    types: [published]
+
+permissions:
+  contents: read
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Resolve release assets
+        id: release
+        uses: actions/github-script@v8
+        with:
+          script: |
+            const release = context.payload.release
+            const version = release.tag_name.startsWith("v")
+              ? release.tag_name.slice(1)
+              : release.tag_name
+            const archiveName = `sbt-${version}.tgz`
+            const checksumName = `${archiveName}.sha256`
+
+            const assets = await github.paginate(
+              github.rest.repos.listReleaseAssets,
+              {
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                release_id: release.id,
+                per_page: 100,
+              },
+            )
+
+            const archive = assets.find((asset) => asset.name === archiveName)
+            if (!archive) {
+              core.setFailed(
+                `Release ${release.tag_name} is missing ${archiveName}; SDKMAN publication requires the packaged .tgz asset.`,
+              )
+              return
+            }
+
+            const checksumAsset = assets.find((asset) => asset.name === checksumName)
+
+            let checksumSha256 = ""
+            if (typeof archive.digest === "string" && archive.digest.startsWith("sha256:")) {
+              checksumSha256 = archive.digest.slice("sha256:".length)
+            } else if (checksumAsset) {
+              const response = await fetch(checksumAsset.browser_download_url)
+              if (!response.ok) {
+                core.setFailed(
+                  `Could not download ${checksumName} from ${checksumAsset.browser_download_url}.`,
+                )
+                return
+              }
+
+              const text = (await response.text()).trim()
+              checksumSha256 = text.split(/\s+/)[0]
+            } else {
+              core.setFailed(
+                `Release ${release.tag_name} is missing both an asset digest and ${checksumName}; SDKMAN publication requires a SHA-256 checksum.`,
+              )
+              return
+            }
+
+            core.setOutput("version", version)
+            core.setOutput("archive_url", archive.browser_download_url)
+            core.setOutput("checksum_sha256", checksumSha256)
+            core.setOutput("prerelease", String(Boolean(release.prerelease)))
+
+      - name: Release candidate on SDKMAN!
+        uses: sdkman/sdkman-release-action@3eb9347b254fc89b9af3a1ed08b874228f3dcd1f
+        with:
+          consumer-key: ${{ secrets.SDKMAN_CONSUMER_KEY }}
+          consumer-token: ${{ secrets.SDKMAN_CONSUMER_TOKEN }}
+          candidate: sbt
+          version: ${{ steps.release.outputs.version }}
+          url: ${{ steps.release.outputs.archive_url }}
+          checksum-sha-256: ${{ steps.release.outputs.checksum_sha256 }}
+
+      - name: Set default SDKMAN! version
+        if: ${{ steps.release.outputs.prerelease != 'true' }}
+        uses: sdkman/sdkman-default-action@38ca710dbacfada85ccfb609953e4c92a717e557
+        with:
+          CONSUMER-KEY: ${{ secrets.SDKMAN_CONSUMER_KEY }}
+          CONSUMER-TOKEN: ${{ secrets.SDKMAN_CONSUMER_TOKEN }}
+          CANDIDATE: sbt
+          VERSION: ${{ steps.release.outputs.version }}