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/* sbt -- Simple Build Tool
* Copyright 2010 Mark Harrah
*/
package sbt
package inc
import xsbti.api.Source
import xsbti.DependencyContext._
import java.io.File
/**
* The merge/groupBy functionality requires understanding of the concepts of internalizing/externalizing dependencies:
*
* Say we have source files X, Y. And say we have some analysis A_X containing X as a source, and likewise for A_Y and Y.
* If X depends on Y then A_X contains an external dependency X -> Y.
*
* However if we merge A_X and A_Y into a combined analysis A_XY, then A_XY contains X and Y as sources, and therefore
* X -> Y must be converted to an internal dependency in A_XY. We refer to this as "internalizing" the dependency.
*
* The reverse transformation must occur if we group an analysis A_XY into A_X and A_Y, so that the dependency X->Y
* crosses the boundary. We refer to this as "externalizing" the dependency.
*
* These transformations are complicated by the fact that internal dependencies are expressed as source file -> source file,
* but external dependencies are expressed as source file -> fully-qualified class name.
*/
trait Analysis {
val stamps: Stamps
val apis: APIs
/** Mappings between sources, classes, and binaries. */
val relations: Relations
val infos: SourceInfos
/**
* Information about compiler runs accumulated since `clean` command has been run.
*
* The main use-case for using `compilations` field is to determine how
* many iterations it took to compilen give code. The `Compilation` object
* are also stored in `Source` objects so there's an indirect way to recover
* information about files being recompiled in every iteration.
*
* The incremental compilation algorithm doesn't use information stored in
* `compilations`. It's safe to prune contents of that field without breaking
* internal consistency of the entire Analysis object.
*/
val compilations: Compilations
/** Concatenates Analysis objects naively, i.e., doesn't internalize external deps on added files. See `Analysis.merge`. */
def ++(other: Analysis): Analysis
/** Drops all analysis information for `sources` naively, i.e., doesn't externalize internal deps on removed files. */
def --(sources: Iterable[File]): Analysis
def copy(stamps: Stamps = stamps, apis: APIs = apis, relations: Relations = relations, infos: SourceInfos = infos,
compilations: Compilations = compilations): Analysis
def addSource(src: File, api: Source, stamp: Stamp, info: SourceInfo,
products: Iterable[(File, String, Stamp)],
internalDeps: Iterable[InternalDependency],
externalDeps: Iterable[ExternalDependency],
binaryDeps: Iterable[(File, String, Stamp)]): Analysis
@deprecated("Register all products and dependencies in addSource.", "0.13.8")
def addSource(src: File, api: Source, stamp: Stamp, directInternal: Iterable[File], inheritedInternal: Iterable[File], info: SourceInfo): Analysis
@deprecated("Register all products and dependencies in addSource.", "0.13.8")
def addBinaryDep(src: File, dep: File, className: String, stamp: Stamp): Analysis
@deprecated("Register all products and dependencies in addSource.", "0.13.8")
def addExternalDep(src: File, dep: String, api: Source, inherited: Boolean): Analysis
@deprecated("Register all products and dependencies in addSource.", "0.13.8")
def addProduct(src: File, product: File, stamp: Stamp, name: String): Analysis
/** Partitions this Analysis using the discriminator function. Externalizes internal deps that cross partitions. */
def groupBy[K](discriminator: (File => K)): Map[K, Analysis]
override lazy val toString = Analysis.summary(this)
}
object Analysis {
lazy val Empty: Analysis = new MAnalysis(Stamps.empty, APIs.empty, Relations.empty, SourceInfos.empty, Compilations.empty)
private[sbt] def empty(nameHashing: Boolean): Analysis = new MAnalysis(Stamps.empty, APIs.empty,
Relations.empty(nameHashing = nameHashing), SourceInfos.empty, Compilations.empty)
/** Merge multiple analysis objects into one. Deps will be internalized as needed. */
def merge(analyses: Traversable[Analysis]): Analysis = {
if (analyses.exists(_.relations.nameHashing))
throw new IllegalArgumentException("Merging of Analyses that have" +
"`relations.memberRefAndInheritanceDeps` set to `true` is not supported.")
// Merge the Relations, internalizing deps as needed.
val mergedSrcProd = Relation.merge(analyses map { _.relations.srcProd })
val mergedBinaryDep = Relation.merge(analyses map { _.relations.binaryDep })
val mergedClasses = Relation.merge(analyses map { _.relations.classes })
val stillInternal = Relation.merge(analyses map { _.relations.direct.internal })
val (internalized, stillExternal) = Relation.merge(analyses map { _.relations.direct.external }) partition { case (a, b) => mergedClasses._2s.contains(b) }
val internalizedFiles = Relation.reconstruct(internalized.forwardMap mapValues { _ flatMap mergedClasses.reverse })
val mergedInternal = stillInternal ++ internalizedFiles
val stillInternalPI = Relation.merge(analyses map { _.relations.publicInherited.internal })
val (internalizedPI, stillExternalPI) = Relation.merge(analyses map { _.relations.publicInherited.external }) partition { case (a, b) => mergedClasses._2s.contains(b) }
val internalizedFilesPI = Relation.reconstruct(internalizedPI.forwardMap mapValues { _ flatMap mergedClasses.reverse })
val mergedInternalPI = stillInternalPI ++ internalizedFilesPI
val mergedRelations = Relations.make(
mergedSrcProd,
mergedBinaryDep,
Relations.makeSource(mergedInternal, stillExternal),
Relations.makeSource(mergedInternalPI, stillExternalPI),
mergedClasses
)
// Merge the APIs, internalizing APIs for targets of dependencies we internalized above.
val concatenatedAPIs = (APIs.empty /: (analyses map { _.apis }))(_ ++ _)
val stillInternalAPIs = concatenatedAPIs.internal
val (internalizedAPIs, stillExternalAPIs) = concatenatedAPIs.external partition { x: (String, Source) => internalized._2s.contains(x._1) }
val internalizedFilesAPIs = internalizedAPIs flatMap {
case (cls: String, source: Source) => mergedRelations.definesClass(cls) map { file: File => (file, concatenatedAPIs.internalAPI(file)) }
}
val mergedAPIs = APIs(stillInternalAPIs ++ internalizedFilesAPIs, stillExternalAPIs)
val mergedStamps = Stamps.merge(analyses map { _.stamps })
val mergedInfos = SourceInfos.merge(analyses map { _.infos })
val mergedCompilations = Compilations.merge(analyses map { _.compilations })
new MAnalysis(mergedStamps, mergedAPIs, mergedRelations, mergedInfos, mergedCompilations)
}
def summary(a: Analysis): String =
{
val (j, s) = a.apis.allInternalSources.partition(_.getName.endsWith(".java"))
val c = a.stamps.allProducts
val ext = a.apis.allExternals
val jars = a.relations.allBinaryDeps.filter(_.getName.endsWith(".jar"))
val unreportedCount = a.infos.allInfos.values.map(_.unreportedProblems.size).sum
val sections =
counted("Scala source", "", "s", s.size) ++
counted("Java source", "", "s", j.size) ++
counted("class", "", "es", c.size) ++
counted("external source dependenc", "y", "ies", ext.size) ++
counted("binary dependenc", "y", "ies", jars.size) ++
counted("unreported warning", "", "s", unreportedCount)
sections.mkString("Analysis: ", ", ", "")
}
def counted(prefix: String, single: String, plural: String, count: Int): Option[String] =
count match {
case 0 => None
case 1 => Some("1 " + prefix + single)
case x => Some(x.toString + " " + prefix + plural)
}
}
private class MAnalysis(val stamps: Stamps, val apis: APIs, val relations: Relations, val infos: SourceInfos, val compilations: Compilations) extends Analysis {
def ++(o: Analysis): Analysis = new MAnalysis(stamps ++ o.stamps, apis ++ o.apis, relations ++ o.relations,
infos ++ o.infos, compilations ++ o.compilations)
def --(sources: Iterable[File]): Analysis =
{
val newRelations = relations -- sources
def keep[T](f: (Relations, T) => Set[_]): T => Boolean = f(newRelations, _).nonEmpty
val newAPIs = apis.removeInternal(sources).filterExt(keep(_ usesExternal _))
val newStamps = stamps.filter(keep(_ produced _), sources, keep(_ usesBinary _))
val newInfos = infos -- sources
new MAnalysis(newStamps, newAPIs, newRelations, newInfos, compilations)
}
def copy(stamps: Stamps, apis: APIs, relations: Relations, infos: SourceInfos, compilations: Compilations = compilations): Analysis =
new MAnalysis(stamps, apis, relations, infos, compilations)
def addSource(src: File, api: Source, stamp: Stamp, info: SourceInfo,
products: Iterable[(File, String, Stamp)],
internalDeps: Iterable[InternalDependency],
externalDeps: Iterable[ExternalDependency],
binaryDeps: Iterable[(File, String, Stamp)]): Analysis = {
val newStamps = {
val productStamps = products.foldLeft(stamps.markInternalSource(src, stamp)) {
case (tmpStamps, (toProduct, _, prodStamp)) => tmpStamps.markProduct(toProduct, prodStamp)
}
binaryDeps.foldLeft(productStamps) {
case (tmpStamps, (toBinary, className, binStamp)) => tmpStamps.markBinary(toBinary, className, binStamp)
}
}
val newAPIs = externalDeps.foldLeft(apis.markInternalSource(src, api)) {
case (tmpApis, ExternalDependency(_, toClassName, classApi, _)) => tmpApis.markExternalAPI(toClassName, classApi)
}
val newRelations = relations.addSource(src, products map (p => (p._1, p._2)), internalDeps, externalDeps, binaryDeps)
copy(newStamps, newAPIs, newRelations, infos.add(src, info))
}
def addSource(src: File, api: Source, stamp: Stamp, directInternal: Iterable[File], inheritedInternal: Iterable[File], info: SourceInfo): Analysis = {
val directDeps = directInternal.map(InternalDependency(src, _, DependencyByMemberRef))
val inheritedDeps = inheritedInternal.map(InternalDependency(src, _, DependencyByInheritance))
addSource(src, api, stamp, info, products = Nil, directDeps ++ inheritedDeps, Nil, Nil)
}
def addBinaryDep(src: File, dep: File, className: String, stamp: Stamp): Analysis =
copy(stamps.markBinary(dep, className, stamp), apis, relations.addBinaryDeps(src, (dep, className, stamp) :: Nil), infos)
def addExternalDep(src: File, dep: String, depAPI: Source, inherited: Boolean): Analysis = {
val context = if (inherited) DependencyByInheritance else DependencyByMemberRef
copy(stamps, apis.markExternalAPI(dep, depAPI), relations.addExternalDeps(src, ExternalDependency(src, dep, depAPI, context) :: Nil), infos)
}
def addProduct(src: File, product: File, stamp: Stamp, name: String): Analysis =
copy(stamps.markProduct(product, stamp), apis, relations.addProducts(src, (product, name) :: Nil), infos)
def groupBy[K](discriminator: File => K): Map[K, Analysis] = {
if (relations.nameHashing)
throw new UnsupportedOperationException("Grouping of Analyses that have" +
"`relations.memberRefAndInheritanceDeps` set to `true` is not supported.")
def discriminator1(x: (File, _)) = discriminator(x._1) // Apply the discriminator to the first coordinate.
val kSrcProd = relations.srcProd.groupBy(discriminator1)
val kBinaryDep = relations.binaryDep.groupBy(discriminator1)
val kClasses = relations.classes.groupBy(discriminator1)
val kSourceInfos = infos.allInfos.groupBy(discriminator1)
val (kStillInternal, kExternalized) = relations.direct.internal partition { case (a, b) => discriminator(a) == discriminator(b) } match {
case (i, e) => (i.groupBy(discriminator1), e.groupBy(discriminator1))
}
val kStillExternal = relations.direct.external.groupBy(discriminator1)
// Find all possible groups.
val allMaps = kSrcProd :: kBinaryDep :: kStillInternal :: kExternalized :: kStillExternal :: kClasses :: kSourceInfos :: Nil
val allKeys: Set[K] = (Set.empty[K] /: (allMaps map { _.keySet }))(_ ++ _)
// Map from file to a single representative class defined in that file.
// This is correct (for now): currently all classes in an external dep share the same Source object,
// and a change to any of them will act like a change to all of them.
// We don't use all the top-level classes in source.api.definitions, even though that's more intuitively
// correct, because this can cause huge bloat of the analysis file.
def getRepresentativeClass(file: File): Option[String] = apis.internalAPI(file).api.definitions.headOption map { _.name }
// Create an Analysis for each group.
(for (k <- allKeys) yield {
def getFrom[A, B](m: Map[K, Relation[A, B]]): Relation[A, B] = m.getOrElse(k, Relation.empty)
// Products and binary deps.
val srcProd = getFrom(kSrcProd)
val binaryDep = getFrom(kBinaryDep)
// Direct Sources.
val stillInternal = getFrom(kStillInternal)
val stillExternal = getFrom(kStillExternal)
val externalized = getFrom(kExternalized)
val externalizedClasses = Relation.reconstruct(externalized.forwardMap mapValues { _ flatMap getRepresentativeClass })
val newExternal = stillExternal ++ externalizedClasses
// Public inherited sources.
val stillInternalPI = stillInternal filter relations.publicInherited.internal.contains
val stillExternalPI = stillExternal filter relations.publicInherited.external.contains
val externalizedPI = externalized filter relations.publicInherited.internal.contains
val externalizedClassesPI = Relation.reconstruct(externalizedPI.forwardMap mapValues { _ flatMap getRepresentativeClass })
val newExternalPI = stillExternalPI ++ externalizedClassesPI
// Class names.
val classes = getFrom(kClasses)
// Create new relations for this group.
val newRelations = Relations.make(
srcProd,
binaryDep,
Relations.makeSource(stillInternal, newExternal),
Relations.makeSource(stillInternalPI, newExternalPI),
classes
)
// Compute new API mappings.
def apisFor[T](m: Map[T, Source], x: Traversable[T]): Map[T, Source] =
(x map { e: T => (e, m.get(e)) } collect { case (t, Some(source)) => (t, source) }).toMap
val stillInternalAPIs = apisFor(apis.internal, srcProd._1s)
val stillExternalAPIs = apisFor(apis.external, stillExternal._2s)
val externalizedAPIs = apisFor(apis.internal, externalized._2s)
val externalizedClassesAPIs = externalizedAPIs flatMap {
case (file: File, source: Source) => getRepresentativeClass(file) map { cls: String => (cls, source) }
}
val newAPIs = APIs(stillInternalAPIs, stillExternalAPIs ++ externalizedClassesAPIs)
// New stamps.
val newStamps = Stamps(
stamps.products.filterKeys(srcProd._2s.contains),
stamps.sources.filterKeys({ discriminator(_) == k }),
stamps.binaries.filterKeys(binaryDep._2s.contains),
stamps.classNames.filterKeys(binaryDep._2s.contains))
// New infos.
val newSourceInfos = SourceInfos.make(kSourceInfos.getOrElse(k, Map.empty))
(k, new MAnalysis(newStamps, newAPIs, newRelations, newSourceInfos, compilations))
}).toMap
}
override def equals(other: Any) = other match {
// Note: Equality doesn't consider source infos or compilations.
case o: MAnalysis => stamps == o.stamps && apis == o.apis && relations == o.relations
case _ => false
}
override lazy val hashCode = (stamps :: apis :: relations :: Nil).hashCode
}
