Rename our allwpilib (which is now 2020) to not have 2019 in the name

Change-Id: I3c07f85ed32ab8b97db765a9b43f2a6ce7da964a
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..81b333f
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,114 @@
+import edu.wpi.first.toolchain.*
+
+plugins {
+    id 'base'
+    id 'edu.wpi.first.wpilib.versioning.WPILibVersioningPlugin' version '4.0.1'
+    id 'edu.wpi.first.wpilib.repositories.WPILibRepositoriesPlugin' version '2020.2'
+    id 'edu.wpi.first.NativeUtils' apply false
+    id 'edu.wpi.first.GradleJni' version '0.10.1'
+    id 'edu.wpi.first.GradleVsCode' version '0.11.0'
+    id 'idea'
+    id 'visual-studio'
+    id 'net.ltgt.errorprone' version '1.1.1' apply false
+    id 'com.github.johnrengelman.shadow' version '5.2.0' apply false
+}
+
+if (project.hasProperty('buildServer')) {
+    wpilibVersioning.buildServerMode = true
+}
+
+if (project.hasProperty('releaseMode')) {
+    wpilibVersioning.releaseMode = true
+}
+
+allprojects {
+    repositories {
+        mavenCentral()
+    }
+    if (project.hasProperty('releaseMode')) {
+        wpilibRepositories.addAllReleaseRepositories(it)
+    } else {
+        wpilibRepositories.addAllDevelopmentRepositories(it)
+    }
+}
+
+buildScan {
+    termsOfServiceUrl = 'https://gradle.com/terms-of-service'
+    termsOfServiceAgree = 'yes'
+
+    publishAlways()
+}
+
+ext.licenseFile = files("$rootDir/LICENSE.txt", "$rootDir/ThirdPartyNotices.txt")
+
+if (project.hasProperty("publishVersion")) {
+    wpilibVersioning.version.set(project.publishVersion)
+}
+
+wpilibVersioning.version.finalizeValue()
+
+def outputsFolder = file("$buildDir/allOutputs")
+
+def versionFile = file("$outputsFolder/version.txt")
+
+task outputVersions() {
+    description = 'Prints the versions of wpilib to a file for use by the downstream packaging project'
+    group = 'Build'
+    outputs.files(versionFile)
+
+    doFirst {
+        buildDir.mkdir()
+        outputsFolder.mkdir()
+    }
+
+    doLast {
+        versionFile.write wpilibVersioning.version.get()
+    }
+}
+
+task libraryBuild() {}
+
+build.dependsOn outputVersions
+
+task copyAllOutputs(type: Copy) {
+    destinationDir outputsFolder
+}
+
+build.dependsOn copyAllOutputs
+copyAllOutputs.dependsOn outputVersions
+
+ext.addTaskToCopyAllOutputs = { task ->
+    copyAllOutputs.dependsOn task
+    copyAllOutputs.inputs.file task.archivePath
+    copyAllOutputs.from task.archivePath
+}
+
+subprojects {
+    apply plugin: 'eclipse'
+    apply plugin: 'idea'
+
+    def subproj = it
+
+    plugins.withType(NativeComponentPlugin) {
+        subproj.apply plugin: MultiBuilds
+    }
+
+    apply from: "${rootDir}/shared/java/javastyle.gradle"
+
+    // Disables doclint in java 8.
+    if (JavaVersion.current().isJava8Compatible()) {
+        tasks.withType(Javadoc) {
+            if (project.name != "docs") {
+                options.addStringOption('Xdoclint:none', '-quiet')
+            }
+        }
+    }
+}
+
+ext.getCurrentArch = {
+    return NativePlatforms.desktop
+}
+
+wrapper {
+    gradleVersion = '6.0'
+}