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build.sbt
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build.sbt
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name := "ScalaSpreadSheets"
version := "0.1"
scalaVersion := "2.13.0"
val fastCompileRenderer = taskKey[File]("Return main file")
lazy val fastCompileCreateFunctions = taskKey[Unit]("Fast compile, and adds to the compiled file the created functions")
val fullCompileRenderer = taskKey[File]("Return full optimized main file")
lazy val fullCompileCreateFunctions = taskKey[Unit]("Full compile, and adds to the compiled file the created functions")
scalacOptions in ThisBuild ++= Seq("-unchecked", "-deprecation")
/**
* Returns a list of stuff to add at the end of compiled file for adding Google functions.
*
* The file already compiled so we may assume comments, parenthesis and stuff are balanced.
*/
def exploreFileForFunctions(directory: File): List[String] = {
// while scanning a file, we first collect all function definitions and all comments found
sealed trait InfoConstruction
case class Comments(docs: List[String], startIdx: Int) extends InfoConstruction {
val endIdx = startIdx + docs.length - 1
}
case class FunctionDefinition(functionName: String, arguments: List[String], startIdx: Int) extends InfoConstruction {
val args: String = arguments.mkString(", ")
private def commentsToGoogleComments(comments: List[String]): List[String] = {
if (comments.isEmpty) Nil
else {
val lastCommentLine = comments.last
comments.dropRight(1) ++ (if (lastCommentLine.dropRight(2).trim.isEmpty) {
List(
" * @customfunction",
lastCommentLine
)
} else {
List(
lastCommentLine.dropRight(2),
" * @customfunction",
" */"
)
})
}
}
def toGoogleFunction: List[String] = List(
s"function ${functionName.toUpperCase}($args) { return $functionName($args) }"
)
def toGoogleFunction(comments: List[String]): List[String] =
commentsToGoogleComments(comments) ++ toGoogleFunction
def toOverloadedGoogleFunction: List[String] = List(
s"function ${functionName.toUpperCase}() { return $functionName.apply(void 0, arguments) }"
)
def toOverloadedGoogleFunction(comments: List[String]): List[String] =
commentsToGoogleComments(comments) ++ toOverloadedGoogleFunction
}
// search for all relevant information for building the Google functions
@scala.annotation.tailrec
def constructInformation(
lines: List[String],
lineIdx: Int,
information: List[InfoConstruction]
): List[InfoConstruction] = {
if (lines.isEmpty) information
else {
val line = lines.head
if (line.contains("/**")) { // beginning of a comment
val endOfCommentsIdx = lines.indexWhere(_.contains("*/")) // looking where comment ends
val lastLine = lines(endOfCommentsIdx)
// splitting last comment line where the comment ends
val (endOfComment, restOfTheLine) = lastLine.splitAt(lastLine.indexOf("*/") + 2)
// creating the comment
val comments = Comments(lines.take(endOfCommentsIdx) :+ endOfComment, lineIdx)
// continuing with the new comment created.
constructInformation(
restOfTheLine +: lines.drop(endOfCommentsIdx + 1), lineIdx + endOfCommentsIdx, information :+ comments
)
} else if (line.contains("@JSExportTopLevel(\"")) { // need to add a function
"""(?<=\").+?(?=\")""".r.findFirstIn(line) match {
case Some(functionName) => // found correct export function name, look for function arguments
@scala.annotation.tailrec
def findFunction(lines: List[String], lineNbr: Int, fctInfo: String): (List[String], Int) = {
"""(?<=\().*?(?=\))""".r.findFirstIn(fctInfo) match {
case Some(args) => // here args is a string of the form "arg1: T1, arg2: T2, arg3: T3"
(
if (args.trim == "") Nil // no argument here
else {
args.split(""", ?""")
.map(arg => """.+(?=:)""".r.findFirstIn(arg).get)
.toList
.map(_.trim) // results is a List of the form List(arg1,arg2,arg3)
},
lineNbr
)
case None => // we did not find all the arguments yet. continue searching with next line
findFunction(lines.tail, lineNbr + 1, fctInfo ++ lines.head)
}
}
val annotationRemoved = lines.head.drop(
"""@JSExportTopLevel\(\".+?\"\)""".r.findFirstIn(lines.head).get.length
)
val (arguments, lineNbr) = findFunction(annotationRemoved +: lines.tail, 0, "")
constructInformation(
lines.drop(lineNbr),
lineIdx + lineNbr,
information :+ FunctionDefinition(functionName, arguments, lineIdx)
)
case None =>
println(s"[warning] malformed exported function at line ${lineIdx + 1} in file ${directory.toString}")
constructInformation(lines.tail, lineIdx + 1, information)
}
} else {
constructInformation(lines.tail, lineIdx + 1, information)
}
}
}
val exportedFunctionsFile = IO.readLines(directory)
val information = constructInformation(exportedFunctionsFile, 0, List[InfoConstruction]())
val (functionDefinitions, commentDefinitions) = information.partition(_.isInstanceOf[FunctionDefinition])
val functions = functionDefinitions.map(_.asInstanceOf[FunctionDefinition])
val comments = commentDefinitions.map(_.asInstanceOf[Comments])
val functionsWithComments = functions
.map(fct => (fct, comments.find(_.endIdx + 1 == fct.startIdx)))
val grouped = functionsWithComments.groupBy(_._1.functionName)
val (overloaded, single) = grouped.partition(_._2.tail.nonEmpty)
(single.values.flatten.flatMap({
case (fct, Some(jsDocs)) => fct.toGoogleFunction(jsDocs.docs)
case (fct, None) => fct.toGoogleFunction
}) ++ overloaded.values.map(functions => {
functions.find(_._2.isDefined) match {
case Some(elem) => elem
case None => functions.head
}
}).flatMap({
case (fct, Some(jsDocs)) => fct.toOverloadedGoogleFunction(jsDocs.docs)
case (fct, None) => fct.toOverloadedGoogleFunction
})).toList
}
def recursiveListFiles(f: File): Array[File] = {
val (directories, files) = f.listFiles.partition(_.isDirectory)
files.filter(_.toString.endsWith(".scala")) ++ directories.flatMap(recursiveListFiles)
}
def createGoogleFunctions(compiledFileDirectory: File, baseDirectory: File): Unit = {
// ignoring files listed in file "google-export-ignore".
val ignoredFiles = IO.readLines(baseDirectory / "google-export-ignore")
.map(_.trim)
.filter(_.nonEmpty)
.filterNot(_.startsWith("//"))
if (ignoredFiles.nonEmpty) {
println(s"[info] Ignoring files: ${ignoredFiles.mkString(", ")}")
}
// searching for all files in the src directory
val functions = recursiveListFiles(baseDirectory / "src/main")
.filterNot(file => ignoredFiles.exists(file.toString.endsWith))
.flatMap(exploreFileForFunctions)
val parentDir = compiledFileDirectory.getParent
IO.writeLines(
new java.io.File(parentDir) / "google.js",
IO.readLines(compiledFileDirectory) ++ functions
)
}
fastCompileCreateFunctions := {
createGoogleFunctions(fastCompileRenderer.value, baseDirectory.value)
}
fullCompileCreateFunctions := {
createGoogleFunctions(fullCompileRenderer.value, baseDirectory.value)
}
lazy val `renderer` = project.in(file("."))
.enablePlugins(ScalaJSPlugin)
.settings(
scalaJSLinkerConfig in ThisBuild ~= { _.withESFeatures(_.withUseECMAScript2015(false)) },
fastCompileRenderer := {
(fastOptJS in Compile).value.data
},
fullCompileRenderer := {
(fullOptJS in Compile).value.data
}
)