ErickErickson commented on a change in pull request #1218: LUCENE-9134: Javacc
skeleton
URL: https://github.com/apache/lucene-solr/pull/1218#discussion_r372711370
##########
File path: gradle/generation/javacc.gradle
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@@ -0,0 +1,102 @@
+// Add a top-level pseudo-task to which we will attach individual regenerate
tasks.
+import static groovy.io.FileType.*
+
+configure(rootProject) {
+ configurations {
+ javacc
+ }
+
+ dependencies {
+ javacc "net.java.dev.javacc:javacc:${scriptDepVersions['javacc']}"
+ }
+
+ task javacc() {
+ description "Regenerate sources for corresponding javacc grammar files."
+ group "generation"
+
+ dependsOn ":lucene:queryparser:javaccParserClassic"
+ dependsOn ":lucene:queryparser:javaccParserSurround"
+ dependsOn ":lucene:queryparser:javaccParserFlexible"
+ }
+}
+
+// We always regenerate, no need to declare outputs.
+class JavaCCTask extends DefaultTask {
+ @Input
+ File javaccFile
+
+ JavaCCTask() {
+ dependsOn(project.rootProject.configurations.javacc)
+ }
+
+ @TaskAction
+ def generate() {
+ if (!javaccFile || !javaccFile.exists()) {
+ throw new RuntimeException("JavaCC input file does not exist:
${javaccFile}")
+ }
+ // Remove old files so we can regenerate them
+ def parentDir = javaccFile.parentFile
+ parentDir.eachFileMatch FILES, ~/.*\.java/, { file ->
+ if (file.text.contains("Generated By:JavaCC")) {
+ file.delete()
+ }
+ }
+ logger.lifecycle("Regenerating JavaCC:\n from: ${javaccFile}\n to:
${parentDir}")
+
+ project.javaexec {
+ classpath {
+ project.rootProject.configurations.javacc
+ }
+ main = "org.javacc.parser.Main"
+ args += "-OUTPUT_DIRECTORY=${parentDir}"
+ args += [javaccFile]
Review comment:
Dawid already combined these two.
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