Gradle LaTeX

import groovy.text.SimpleTemplateEngine
import java.text.DateFormat
import java.text.SimpleDateFormat
import java.util.jar.Attributes
import org.apache.tools.ant.taskdefs.condition.Os
import org.gradle.api.Task
import org.gradle.api.tasks.StopExecutionException
import org.gradle.api.tasks.wrapper.Wrapper
import org.gradle.util.GradleVersion
import org.slf4j.Logger
import org.slf4j.LoggerFactory
import org.apache.tools.ant.filters.ReplaceTokens

apply plugin: 'groovy'

type = 'jar'
buildTime = new Date()
versionModifier = null

sourceSets {
  main { resources { srcDir 'src/latex' } }
}
// PROPERTIES
def stagingDirName = 'build/staging/docs'
def docsDirName = 'build/docs'

task copyDocs << {
  def stagingDir = file(stagingDirName)
  stagingDir.mkdirs()
  copy {
    from('src/latex') { include '**/*.tex','**/*.inc' }
    filter(ReplaceTokens, tokens: [release: version, docVersion: docVersion])
    into stagingDir
    includeEmptyDirs = false
  }
}

task myInitConfig(type:Copy) << {
  def stagingDir = file(stagingDirName)
  stagingDir.mkdirs()
  from('src/latex') { include '**/*.tex' //
  }
  into stagingDir
  includeEmptyDirs = false
}

task genDocs << {
  myInitConfig.execute()
  cleanLatex(file(stagingDirName))
  copyDocs.execute()
  if (!isLatexInstallled()) {
    throw new StopExecutionException('Latex is not installed. We skip the document!')
  }
  FileTree tree = fileTree(dir: stagingDirName)
  tree.include '**/*.tex'
  tree.each {File file ->
    compileLatex(file)
  }
}

boolean isLatexInstallled() {
  boolean ret_val = false;
  try {
    ant.exec(output: 'build/staging/findLatexOut', executable: 'pdflatex', dir: projectDir) { arg(line: "-help") }
    ret_val = true
  } catch (Throwable e) {
    e.printStackTrace();
    ret_val = false
  }
  return ret_val
}

void cleanLatex(File dir) {
  file(dir.path).mkdirs()
  ant.delete() {
    fileset(dir: dir, includes: "*.aux, *.lg, *.tmp, *.html, *.pdf, *.log, *.dvi, *.css, *.fdb_latexmk, *.idv, *.toc, *.xref, *.4ct, *.4tc, *.out")
  }
}

void compileLatex(File fileToProcess) {
  3.times {
    ant.exec(executable: 'pdflatex', dir: fileToProcess.parent, failonerror: true) { arg(value: fileToProcess.name) }
  }
  3.times {
    ant.exec(executable: 'makeindex', dir: fileToProcess.parent, failonerror: true) { arg(value: fileToProcess.name) }
  }
  3.times {
    ant.exec(executable: 'pdflatex', dir: fileToProcess.parent, failonerror: true) { arg(value: fileToProcess.name) }
  }
}