Add infrastructure for setting up GraalVM.

src/main.ts

@@ -1,9 +1,48 @@
+import * as c from './constants'
 import * as core from '@actions/core'
+import * as graalvm from './graalvm'
+import {join} from 'path'
+import {mkdirP} from '@actions/io'
+import {setUpGraalVMTrunk} from './graalvm-trunk'
 
 async function run(): Promise<void> {
   try {
+    const graalvmVersion: string = core.getInput('version', {required: true})
+    const javaVersion: string = core.getInput('java-version', {required: true})
+    const componentsString: string = core.getInput('components')
+    const components: string[] =
+      componentsString.length > 0 ? componentsString.split(',') : []
+    const setJavaHome = core.getInput('set-java-home') === 'true'
+
+    await mkdirP(c.GRAALVM_BASE)
+
+    // Download or build GraalVM
     let graalVMHome
+    switch (graalvmVersion) {
+      case c.VERSION_LATEST:
+        graalVMHome = await graalvm.setUpGraalVMLatest(javaVersion)
+        break
+      case c.VERSION_NIGHTLY:
+        graalVMHome = await graalvm.setUpGraalVMNightly(javaVersion)
+        break
+      case c.VERSION_TRUNK:
+        graalVMHome = await setUpGraalVMTrunk(javaVersion, components)
+        break
+      default:
+        graalVMHome = await graalvm.setUpGraalVMRelease(
+          graalvmVersion,
+          javaVersion
+        )
+        break
+    }
+
+    // Activate GraalVM
+    core.debug(`Activating GraalVM located at '${graalVMHome}'...`)
     core.exportVariable('GRAALVM_HOME', graalVMHome)
+    core.addPath(join(graalVMHome, 'bin'))
+    if (setJavaHome) {
+      core.exportVariable('JAVA_HOME', graalVMHome)
+    }
   } catch (error) {
     if (error instanceof Error) core.setFailed(error.message)
   }