dweiss commented on a change in pull request #1218: Javacc erick
URL: https://github.com/apache/lucene-solr/pull/1218#discussion_r371656935
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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 ->
Review comment:
If these files get overwritten I don't think we should care about explicit
deletions (?).
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