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August 29, 2015 13:57
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Compiling templates to an object that throws a runtime error. Useful for large refactorings, where you temporarily don't want to be bothered by compilation errors in templates.
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import sbt._ | |
import Keys._ | |
import play.Project._ | |
object ApplicationBuild extends Build { | |
val appName = "fake-templates" | |
val appVersion = "1.0-SNAPSHOT" | |
val appDependencies = Seq( | |
// Add your project dependencies here, | |
jdbc, | |
anorm) | |
val main = play.Project(appName, appVersion, appDependencies).settings( | |
// Add your own project settings here | |
sourceGenerators in Compile ~= { (sg) => sg.init }, | |
sourceGenerators in Compile <+= (state, sourceDirectory in Compile, sourceManaged in Compile, templatesTypes, templatesImport) map FakeScalaTemplateCompiler.FakeScalaTemplates) | |
object FakeScalaTemplateCompiler { | |
import scalax.file._ | |
import scala.util.parsing.input._ | |
import play.templates._ | |
import play.templates.ScalaTemplateCompiler._ | |
import java.io.File | |
def FakeScalaTemplates(state: State, sourceDirectory: java.io.File, generatedDir: java.io.File, templateTypes: PartialFunction[String, (String, String)], additionalImports: Seq[String]) = { | |
import play.templates._ | |
val templateExt: PartialFunction[File, (File, String, String, String)] = { | |
case p if templateTypes.isDefinedAt(p.name.split('.').last) => | |
val extension = p.name.split('.').last | |
val exts = templateTypes(extension) | |
(p, extension, exts._1, exts._2) | |
} | |
(generatedDir ** "*.template.scala").get.map(GeneratedSource(_)).foreach(_.sync()) | |
try { | |
(sourceDirectory ** "*.scala.*").get.collect(templateExt).foreach { | |
case (template, extension, t, format) => | |
FakeScalaTemplateCompiler.compile( | |
template, | |
sourceDirectory, | |
generatedDir, | |
t, | |
format, | |
additionalImports.map("import " + _.replace("%format%", extension)).mkString("\n")) | |
} | |
} catch { | |
case TemplateCompilationError(source, message, line, column) => { | |
throw reportCompilationError(state, TemplateCompilationException(source, message, line, column - 1)) | |
} | |
} | |
(generatedDir ** "*.template.scala").get.map(_.getAbsoluteFile) | |
} | |
def compile(source: File, sourceDirectory: File, generatedDirectory: File, resultType: String, formatterType: String, additionalImports: String = "") = { | |
val (templateName, generatedSource) = generatedFile(source, sourceDirectory, generatedDirectory) | |
if (generatedSource.needRecompilation) { | |
templateParser.parser(new CharSequenceReader(Path(source).string)) match { | |
case templateParser.Success(template, rest) if rest.atEnd => { | |
val templateWithFakeBody = template.copy(content = Seq(ScalaExp(Seq(Simple("""sys.error("This is a fake template!")"""))))) | |
val generated = generateFinalTemplate(source.getAbsolutePath, | |
Path(source).byteArray, | |
templateName.dropRight(1).mkString("."), | |
templateName.takeRight(1).mkString, | |
templateWithFakeBody, | |
resultType, | |
formatterType, | |
additionalImports) | |
Path(generatedSource.file).write(generated.toString) | |
Some(generatedSource.file) | |
} | |
case templateParser.Success(_, rest) => { | |
throw new TemplateCompilationError(source, "Not parsed?", rest.pos.line, rest.pos.column) | |
} | |
case templateParser.NoSuccess(message, input) => { | |
throw new TemplateCompilationError(source, message, input.pos.line, input.pos.column) | |
} | |
} | |
} else None | |
} | |
} | |
} |
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