Build: Assert jar LICENSE and NOTICE files match

Adds tasks that check that the all jars that we build have LICENSE.txt
and NOTICE.txt files and that the files are correct. Sets check to
depend on these task.

This is mostly there for extra parnoia because we automatically
configure all Jar tasks to include the LICENSE.txt and NOTICE.txt
files anyway. But it is quite possible to add configuration to those
tasks that would override either file.

This causes check to depend on several more things than it used to.
Take, for example, javadoc:

check depends on the new verifyJavadocJarNotice which depends on
extractJavadocJar which depends on javadocJar which depends on
javadoc, this check now depends on javadoc.

build.gradle

@@ -20,6 +20,7 @@
 
 import org.apache.tools.ant.taskdefs.condition.Os
 import org.elasticsearch.gradle.BuildPlugin
+import org.elasticsearch.gradle.LoggedExec
 import org.elasticsearch.gradle.Version
 import org.elasticsearch.gradle.VersionCollection
 import org.elasticsearch.gradle.VersionProperties
@@ -30,6 +31,7 @@ import org.gradle.api.tasks.wrapper.Wrapper.DistributionType
 import org.gradle.util.GradleVersion
 import org.gradle.util.DistributionLocator
 
+import java.nio.file.Files
 import java.nio.file.Path
 import java.security.MessageDigest
 
@@ -459,6 +461,59 @@ gradle.projectsEvaluated {
 
 }
 
+static void assertLinesInFile(final Path path, final List<String> expectedLines) {
+  final List<String> actualLines = Files.readAllLines(path)
+  int line = 0
+  for (final String expectedLine : expectedLines) {
+    final String actualLine = actualLines.get(line)
+    if (expectedLine != actualLine) {
+      throw new GradleException("expected line [${line + 1}] in [${path}] to be [${expectedLine}] but was [${actualLine}]")
+    }
+    line++
+  }
+}
+
+/*
+ * Check that all generated JARs have our NOTICE.txt and an appropriate
+ * LICENSE.txt in them. We configurate this in gradle but we'd like to
+ * be extra paranoid.
+ */
+subprojects { project ->
+  project.tasks.withType(Jar).whenTaskAdded { jarTask ->
+    final Task extract = project.task("extract${jarTask.name.capitalize()}", type: LoggedExec) {
+      dependsOn jarTask
+      ext.destination = project.buildDir.toPath().resolve("jar-extracted/${jarTask.name}")
+      commandLine "${->new File(rootProject.compilerJavaHome, 'bin/jar')}",
+          'xf', "${-> jarTask.outputs.files.singleFile}", 'META-INF/LICENSE.txt', 'META-INF/NOTICE.txt'
+      workingDir destination
+      doFirst {
+        project.delete(destination)
+        Files.createDirectories(destination)
+      }
+    }
+
+    final Task checkNotice = project.task("verify${jarTask.name.capitalize()}Notice") {
+      dependsOn extract
+      doLast {
+        final List<String> noticeLines = Files.readAllLines(project.noticeFile.toPath())
+        final Path noticePath = extract.destination.resolve('META-INF/NOTICE.txt')
+        assertLinesInFile(noticePath, noticeLines)
+      }
+    }
+    project.check.dependsOn checkNotice
+
+    final Task checkLicense = project.task("verify${jarTask.name.capitalize()}License") {
+      dependsOn extract
+      doLast {
+        final List<String> licenseLines = Files.readAllLines(project.licenseFile.toPath())
+        final Path licensePath = extract.destination.resolve('META-INF/LICENSE.txt')
+        assertLinesInFile(licensePath, licenseLines)
+      }
+    }
+    project.check.dependsOn checkLicense
+  }
+}
+
 /* Remove assemble on all qa projects because we don't need to publish
  * artifacts for them. */
 gradle.projectsEvaluated {

distribution/archives/build.gradle

@@ -201,8 +201,7 @@ subprojects {
       }
       final List<String> licenseLines = Files.readAllLines(rootDir.toPath().resolve("licenses/" + licenseFilename))
       final Path licensePath = archiveExtractionDir.toPath().resolve("elasticsearch-${VersionProperties.elasticsearch}/LICENSE.txt")
-      final List<String> actualLines = Files.readAllLines(licensePath)
-      assertLinesInFile(licensePath, actualLines, licenseLines)
+      assertLinesInFile(licensePath, licenseLines)
     }
   }
   check.dependsOn checkLicense
@@ -213,8 +212,7 @@ subprojects {
     doLast {
       final List<String> noticeLines = Arrays.asList("Elasticsearch", "Copyright 2009-2018 Elasticsearch")
       final Path noticePath = archiveExtractionDir.toPath().resolve("elasticsearch-${VersionProperties.elasticsearch}/NOTICE.txt")
-      final List<String> actualLines = Files.readAllLines(noticePath)
-      assertLinesInFile(noticePath, actualLines, noticeLines)
+      assertLinesInFile(noticePath, noticeLines)
     }
   }
   check.dependsOn checkNotice
@@ -304,4 +302,3 @@ configure(subprojects.findAll { it.name.contains('zip') }) {
     }
   }
 }
-

distribution/build.gradle

@@ -460,14 +460,3 @@ subprojects {
     return result
   }
 }
-
-static void assertLinesInFile(final Path path, final List<String> actualLines, final List<String> expectedLines) {
-  int line = 0
-  for (final String expectedLine : expectedLines) {
-    final String actualLine = actualLines.get(line)
-    if (expectedLine != actualLine) {
-      throw new GradleException("expected line [${line + 1}] in [${path}] to be [${expectedLine}] but was [${actualLine}]")
-    }
-    line++
-  }
-}

distribution/packages/build.gradle

@@ -415,8 +415,7 @@ subprojects {
                 "License: " + expectedLicense)
         final List<String> licenseLines = Files.readAllLines(rootDir.toPath().resolve("licenses/" + licenseFilename))
         final List<String> expectedLines = header + licenseLines.collect { " " + it }
-        final List<String> actualLines = Files.readAllLines(copyrightPath)
-        assertLinesInFile(copyrightPath, actualLines, expectedLines)
+        assertLinesInFile(copyrightPath, expectedLines)
       }
     }
   } else {
@@ -432,8 +431,7 @@ subprojects {
         }
         final List<String> licenseLines = Files.readAllLines(rootDir.toPath().resolve("licenses/" + licenseFilename))
         final Path licensePath = packageExtractionDir.toPath().resolve("usr/share/elasticsearch/LICENSE.txt")
-        final List<String> actualLines = Files.readAllLines(licensePath)
-        assertLinesInFile(licensePath, actualLines, licenseLines)
+        assertLinesInFile(licensePath, licenseLines)
       }
     }
   }
@@ -444,8 +442,7 @@ subprojects {
     doLast {
       final List<String> noticeLines = Arrays.asList("Elasticsearch", "Copyright 2009-2018 Elasticsearch")
       final Path noticePath = packageExtractionDir.toPath().resolve("usr/share/elasticsearch/NOTICE.txt")
-      final List<String> actualLines = Files.readAllLines(noticePath)
-      assertLinesInFile(noticePath, actualLines, noticeLines)
+      assertLinesInFile(noticePath, noticeLines)
     }
   }
   check.dependsOn checkNotice

x-pack/build.gradle

@@ -23,10 +23,8 @@ subprojects {
   ext.licenseName = 'Elastic License'
   ext.licenseUrl = "https://raw.githubusercontent.com/elastic/elasticsearch/${licenseCommit}/licenses/ELASTIC-LICENSE.txt"
 
-  plugins.withType(BuildPlugin).whenPluginAdded {
-    project.licenseFile = rootProject.file('licenses/ELASTIC-LICENSE.txt')
-    project.noticeFile = xpackRootProject.file('NOTICE.txt')
-  }
+  project.ext.licenseFile = rootProject.file('licenses/ELASTIC-LICENSE.txt')
+  project.ext.noticeFile = xpackRootProject.file('NOTICE.txt')
 
   plugins.withType(PluginBuildPlugin).whenPluginAdded {
     project.esplugin.licenseFile = rootProject.file('licenses/ELASTIC-LICENSE.txt')

x-pack/plugin/build.gradle

@@ -31,6 +31,20 @@ configurations {
 task testJar(type: Jar) {
   appendix 'test'
   from sourceSets.test.output
+  /*
+   * Stick the license and notice file in the jar. This isn't strictly
+   * needed because we don't publish it but it makes our super-paranoid
+   * tests happy.
+   */
+  metaInf {
+    from(project.licenseFile.parent) {
+      include project.licenseFile.name
+      rename { 'LICENSE.txt' }
+    }
+    from(project.noticeFile.parent) {
+      include project.noticeFile.name
+    }
+  }
 }
 artifacts {
   testArtifacts testJar

x-pack/plugin/sql/sql-cli/build.gradle

@@ -45,9 +45,12 @@ dependencyLicenses {
  * can be easilly shipped around and used.
  */
 jar {
-    from {
+    from({
         configurations.compile.collect { it.isDirectory() ? it : zipTree(it) }
         configurations.runtime.collect { it.isDirectory() ? it : zipTree(it) }
+    }) {
+        // We don't need the META-INF from the things we bundle. For now.
+        exclude 'META-INF/*'
     }
     manifest {
         attributes 'Main-Class': 'org.elasticsearch.xpack.sql.cli.Cli'