#!/bin/bash -e

# Script Overview
#  - determine scala version
#  - determine module versions
#  - build minimal core (aka locker) of Scala, use the determined version number, publish to private-repo
#  - build those modules where a binary compatible version doesn't exist, publish to private-repo
#  - build Scala using the previously built core and bootstrap modules, publish to private-repo (overwrites the minimal core version on private-repo)
#  - for releases (not nightlies)
#    - stage Scala on sonatype
#    - rebuild modules that needed a rebuild with this Scala build, and stage them on sonatype
#  - for nightlies
#    - force rebuild all modules and publish them locally (for testing purposes)
#  - the Scala version is serialized to jenkins.properties, which is passed downstream to scala-release jobs
#    - this removes the need to tag scala/scala-dist (it's still encouraged for releases, but not a hard requirement)


# Specifying the Scala version:
#  - To build a release (this enables publishing to sonatype):
#    - Either specify SCALA_VER_BASE. You may also specify SCALA_VER_SUFFIX, the Scala version is SCALA_VER=$SCALA_VER_BASE$SCALA_VER_SUFFIX.
#    - Or have the current HEAD tagged as v$base$suffix
#    - To prevent staging on sonatype (for testing), set publishToSonatype to anything but "yes"
#    - Note: After building a release, the jenkins job provides an updated versions.properties file as artifact.
#      Put this file in the Scala repo and create a pull request, and also update the file build.number.
#
# - Otherwise, a nightly release is built:
#    - version number is read from the build.number file, extended with -$sha-nightly


# Specifying module versions: there are two modes
#  - If moduleVersioning="versions.properties" (default): in this mode we use release versions for the modules.
#    - Module versions are read from the versions.properties file.
#    - Set <MODULE>_VER to override the default, e.g. XML_VER="1.0.4".
#    - The git revision is set to <MODULE>_REF="v$<MODULE>_VER". Make sure the tag exists (you can't override <MODULE>_REF).
#
#  - Otherwise (moduleVersioning has some other value): in this mode we use nightly version numbers for modules.
#    - By default the script sets all <MODULE>_REF to "HEAD", override to build a specific revision.
#    - The <MODULE>_VER is set to a nightly version, for example "1.0.3-7-g14888a2-nightly" (you can't override <MODULE>_VER)


# Modules are automatically built if necessary.
#  - A module is built if it doesn't exist in the maven repository. Note that the lookup uses two versions:
#    - The version of the module (see below how it's determined)
#    - The binary version of of the SCALA_VER release that is being built
#  - sbt computes the binary version when looking up / building modules (*). Examples:
#    - 2.12.0-M1, 2.12.0-RC3: the full version is used
#    - 2.12.0, 2.12.1-M1, 2.12.1-RC3, 2.12.1: the binary version 2.12 is used
#
#  - Example: assume that `scala-xml_2.11 % 1.0.3` and `scala-xml_2.12.0-M1 % 1.0.3` both exists
#    - XML_VER=1.0.3 and SCALA_VER=2.11.7    => no rebuild (binary version remains 2.11)
#    - XML_VER=1.0.3 and SCALA_VER=2.12.0-M2 => rebuild (new binary version 2.12.0-M2)
#    - XML_VER=1.0.4 and SCALA_VER=2.11.7    => rebuild (new version for the module, not yet on maven)
#      NOTE: this is not the recommended way of publishing a module. Instead, prefer to release `scala-xml_2.11 % 1.0.4`
#            using the existing scala 2.11.6 compiler before releasing 2.11.7. Sometimes it's necessary though. One
#            example was 2.11.1, which contained a fix in the backend (SerialVersionUID was ignored). All modules needed
#            to be re-built using the 2.11.1 release, we could not use 2.11.0. We could also not release the modules
#            after 2.11.1 was out, because that way the scala-library-all pom of 2.11.1 would depend on the old modules.
#
# (*) https://github.com/sbt/sbt/blob/0.13.8/util/cross/src/main/input_sources/CrossVersionUtil.scala#L39


# Binary incompatible changes in Modules: example with Scala 2.11 / 2.12 and scala-parser-combinators
#  - The 1.0.x branch on scala-parser-combinators remains binary compatible with 1.0.0
#  - Scala 2.11 will always use 1.0.x releases: we ship scala-parser-combinators with the distribution,
#    so we cannot introduce incompatible changes in a minor release.
#  - The master branch of scala-parser-combinators contains binary incompatible changes, versioned 1.1.x
#  - Scala 2.12 will use 1.1.x releases
#  - No changes to the build script required: just put the 1.1.x version number into versions.properties
#
# Note: It's still OK for a module to release a binary incompatible version to maven, for example
# scala-parser-combinators_2.11 % 1.1.0. Users can depend on this in their sbt build. But for the
# distribution (tar/zip archives, scala-library-all) we have to stay on the binary compatible version.


# Requirements
#  - SBT_CMD must point to sbt from sbt-extras
#  - ~/.sonatype-curl, ~/.m2/settings.xml, ~/.credentials, ~/.credentials-sonatype, ~/.credentials-private-repo
#    as defined by https://github.com/scala/scala-jenkins-infra/tree/master/templates/default
#  - ~/.sbt/0.13/plugins/gpg.sbt with:
#     addSbtPlugin("com.typesafe.sbt" % "sbt-pgp" % "0.8.1")

# Note: private-repo used to be private-repo.typesafe.com. now we're running artifactory on scala-ci.typesafe.com/artifactory


moduleVersioning=${moduleVersioning-"versions.properties"}

publishPrivateTask=${publishPrivateTask-"publish"}
publishSonatypeTaskCore=${publishSonatypeTaskCore-"publish-signed"}
publishSonatypeTaskModules=${publishSonatypeTaskModules-"publish-signed"}
publishStarrPrivateTask=${publishStarrPrivateTask-$publishPrivateTask} # set to "init" to speed up testing of the script (if you already built STARR before)
publishLockerPrivateTask=${publishLockerPrivateTask-$publishPrivateTask} # set to "init" to speed up testing of the script (if you already built locker before)

forceRebuild=${forceRebuild-no}

antBuildTask="${antBuildTask-nightly}" # TESTING leave empty to avoid the sanity check (don't set it to "init" because ant will croak)
clean="clean" # TESTING leave empty to speed up testing

baseDir=${WORKSPACE-`pwd`}
scriptsDir="$baseDir/scripts"
. $scriptsDir/common

# we must change ivy home to get a fresh ivy cache, otherwise we get half-bootstrapped scala
# rm it in case it existed (and there's no ivy2-shadow, which indicates we're running in a TESTING environment)...
# we don't nuke the whole ws since that clobbers the git clones needlessly
[[ -d $baseDir/ivy2-shadow ]] || rm -rf $baseDir/ivy2
mkdir -p $baseDir/ivy2

rm -rf $baseDir/resolutionScratch_
mkdir -p $baseDir/resolutionScratch_

# repo used to publish "locker" scala to (to start the bootstrap)
releaseTempRepoCred="private-repo"
releaseTempRepoUrl=${releaseTempRepoUrl-"https://scala-ci.typesafe.com/artifactory/scala-release-temp/"}
jcenterCacheUrl=${jcenterCacheUrl-"https://scala-ci.typesafe.com/artifactory/jcenter/"}

# Used below in sbtArgs since we use a dedicated repository to share artifcacts between jobs,
# so we need to configure SBT to use these rather than its default, Maven Central.
# See http://www.scala-sbt.org/0.13/docs/Proxy-Repositories.html
sbtRepositoryConfig="$scriptsDir/repositories-scala-release"
cat > "$sbtRepositoryConfig" << EOF
[repositories]
  private-repo: $releaseTempRepoUrl
  jcenter-cache: $jcenterCacheUrl
  typesafe-ivy-releases: https://dl.bintray.com/typesafe/ivy-releases/, [organisation]/[module]/[revision]/[type]s/[artifact](-[classifier]).[ext], bootOnly
  sbt-plugin-releases: https://dl.bintray.com/sbt/sbt-plugin-releases/, [organisation]/[module]/(scala_[scalaVersion]/)(sbt_[sbtVersion]/)[revision]/[type]s/[artifact](-[classifier]).[ext]
  maven-central
  local
EOF

##### git
gfxd() {
  git clean -fxd # TESTING
}

update() {
  [[ -d $baseDir ]] || mkdir -p $baseDir
  cd $baseDir

  if [ ! -d $baseDir/$2 ]; then git clone "https://github.com/$1/$2.git"; fi

  cd $2

  git fetch --tags "https://github.com/$1/$2.git"
  (git fetch "https://github.com/$1/$2.git" $3 && git checkout -fq FETCH_HEAD) #|| git checkout -fq $3 # || fallback is for local testing on tag
  git reset --hard
}

##### sonatype interface

stApi="https://oss.sonatype.org/service/local"

function st_curl(){
  curl -H "Content-Type: application/json" -H "accept: application/json,application/vnd.siesta-error-v1+json,application/vnd.siesta-validation-errors-v1+json"  -K ~/.sonatype-curl -s -o - $@
}

function st_stagingReposOpen() {
 st_curl "$stApi/staging/profile_repositories" | jq '.data[] | select(.profileName == "org.scala-lang") | select(.type == "open")'
}

function st_stagingRepoDrop() {
  repo=$1
  message=$2
  echo "{\"data\":{\"description\":\"$message\",\"stagedRepositoryIds\":[\"$repo\"]}}" | st_curl -X POST -d @- "$stApi/staging/bulk/drop"
}

function st_stagingRepoClose() {
  repo=$1
  message=$2
  echo "{\"data\":{\"description\":\"$message\",\"stagedRepositoryIds\":[\"$repo\"]}}" | st_curl -X POST -d @- "$stApi/staging/bulk/close"
}


# ARGH trying to get this to work on multiple versions of sbt-extras...
# the old version (on jenkins, and I don't want to upgrade for risk of breaking other builds) honors -sbt-dir
# the new version of sbt-extras ignores sbt-dir, so we pass it in as -Dsbt.global.base
# need to set sbt-dir to one that has the gpg.sbt plugin config
sbtArgs="-no-colors -ivy $baseDir/ivy2 -Dsbt.override.build.repos=true -Dsbt.repository.config=$sbtRepositoryConfig -Dsbt.global.base=$HOME/.sbt/0.13 -sbt-dir $HOME/.sbt/0.13"

sbtBuild() {
  echo "### sbtBuild: "$SBT_CMD $sbtArgs "${scalaVersionTasks[@]}" "${publishTasks[@]}" "$@"
  $SBT_CMD $sbtArgs "${scalaVersionTasks[@]}" "${publishTasks[@]}" "$@" >> $baseDir/logs/builds 2>&1
}

sbtResolve() {
  cd $baseDir/resolutionScratch_
  touch build.sbt
  # Can be set to `full` if a module requires cross-versioning against the full Scala version, like the continuations plugin used to.
  cross=${4-binary}
  echo "### sbtResolve: $SBT_CMD $sbtArgs " "${scalaVersionTasks[@]}" "\"$1\" % \"$2\" % \"$3\" cross CrossVersion.$cross"
  $SBT_CMD $sbtArgs "${scalaVersionTasks[@]}" \
    "set libraryDependencies := Seq(\"$1\" % \"$2\" % \"$3\" cross CrossVersion.$cross)" \
      'show update' >> $baseDir/logs/resolution 2>&1
}

# Oh boy... can't use scaladoc to document scala-xml/scala-parser-combinators
# if scaladoc depends on the same version of scala-xml/scala-parser-combinators.
# Even if that version is available through the project's resolvers, sbt won't look past this project.
# SOOOOO, we set the version to a dummy (-DOC), generate documentation,
# then set the version to the right one and publish (which won't re-gen the docs).
# Also tried publish-local without docs using 'set publishArtifact in (Compile, packageDoc) := false' and republishing, no dice.

# Each buildModule() function is invoked twice: first to build against locker and publish to private-repo, then
# to build against the release and publish to sonatype (or publish-local if publishToSonatype is not "yes").
# In the second round, sbtResolve is always true: the module will be found in the private-repo!
# Therefore, if MODULE_BUILT is "yes" (in the second round), we know that we need to build (and publish) the
# module again.
#
# Note: we tried an alternative solution in which sbtResolve would not look at private-repo, but that fails. For example,
# scala-xml depends on scala-library, so sbt tries to find the scala-library of the version that we are currently building,
# which exists only in private-repo.

docTask() {
   if [ "$1" == "yes" ]; then echo doc; else echo set publishArtifact in packageDoc in Compile := false; fi
}

buildXML() {
  if [ "$XML_BUILT" != "yes" ] && [ "$forceRebuild" != "yes" ] && ( sbtResolve "org.scala-lang.modules"  "scala-xml" $XML_VER )
  then echo "Found scala-xml $XML_VER; not building."
  else
    update scala scala-xml "$XML_REF" && gfxd
    doc="$(docTask $XML_BUILT)"
    sbtBuild 'set version := "'$XML_VER'-DOC"' $clean "$doc" 'set version := "'$XML_VER'"' test "${buildTasks[@]}"
    XML_BUILT="yes" # ensure the module is built and published when buildXML is invoked for the second time, see comment above
  fi
}

buildParsers() {
  if [ "$PARSERS_BUILT" != "yes" ] && [ "$forceRebuild" != "yes" ] && ( sbtResolve "org.scala-lang.modules"  "scala-parser-combinators" $PARSERS_VER )
  then echo "Found scala-parser-combinators $PARSERS_VER; not building."
  else
    update scala scala-parser-combinators "$PARSERS_REF" && gfxd
    doc="$(docTask $PARSERS_BUILT)"
    sbtBuild 'set version := "'$PARSERS_VER'-DOC"' $clean "$doc" 'set version := "'$PARSERS_VER'"' test "${buildTasks[@]}"
    PARSERS_BUILT="yes"
  fi
}

buildPartest() {
  if [ "$PARTEST_BUILT" != "yes" ] && [ "$forceRebuild" != "yes" ] && ( sbtResolve "org.scala-lang.modules"  "scala-partest" $PARTEST_VER )
  then echo "Found scala-partest $PARTEST_VER; not building."
  else
    update scala scala-partest "$PARTEST_REF" && gfxd
    doc="$(docTask $PARTEST_BUILT)"
    sbtBuild 'set version :="'$PARTEST_VER'"' 'set VersionKeys.scalaXmlVersion := "'$XML_VER'"' 'set VersionKeys.scalaCheckVersion := "'$SCALACHECK_VER'"' $clean "$doc" test "${buildTasks[@]}"
    PARTEST_BUILT="yes"
  fi
}

buildSwing() {
  if [ "$SWING_BUILT" != "yes" ] && [ "$forceRebuild" != "yes" ] && ( sbtResolve "org.scala-lang.modules"  "scala-swing" $SWING_VER )
  then echo "Found scala-swing $SWING_VER; not building."
  else
    update scala scala-swing "$SWING_REF" && gfxd
    doc="$(docTask $SWING_BUILT)"
    sbtBuild 'set version := "'$SWING_VER'"' $clean "$doc" test "${buildTasks[@]}"
    SWING_BUILT="yes"
  fi
}

# should only be called with publishTasks publishing to private-repo
buildScalacheck(){
  if [ "$SCALACHECK_BUILT" != "yes" ] && [ "$forceRebuild" != "yes" ] && ( sbtResolve "org.scalacheck"  "scalacheck" $SCALACHECK_VER )
  then echo "Found scalacheck $SCALACHECK_VER; not building."
  else
    update rickynils scalacheck $SCALACHECK_REF && gfxd
    doc="$(docTask $SCALACHECK_BUILT)"
    sbtBuild 'set version := "'$SCALACHECK_VER'"' 'set VersionKeys.scalaParserCombinatorsVersion := "'$PARSERS_VER'"' $clean "$doc" publish # test times out NOTE: never published to sonatype
    SCALACHECK_BUILT="yes"
  fi
}

# build modules, using ${buildTasks[@]} (except for Scalacheck, which is hard-coded to publish to private-repo)
buildModules() {
  publishTasks=('set credentials += Credentials(Path.userHome / ".credentials-private-repo")' "set every publishTo := Some(\"private-repo\" at \"$releaseTempRepoUrl\")")
  buildTasks=($publishPrivateTask)
  buildXML
  buildParsers
  buildSwing
  buildScalacheck
  buildPartest
}

buildPublishedModules() {
  publishTasks=('set credentials += Credentials(Path.userHome / ".credentials-sonatype")' "set pgpPassphrase := Some(Array.empty)")
  buildTasks=($publishSonatypeTaskModules)
  buildXML
  buildParsers
  buildSwing
  buildPartest
}


## BUILD STEPS:

scalaVerToBinary() {
  # $1 = SCALA_VER
  # $2 = SCALA_VER_BASE
  # $3 = SCALA_VER_SUFFIX

  local RE='\([0-9]*\)[.]\([0-9]*\)[.]\([0-9]*\)'
  local majMin="$(echo $2 | sed -e "s#$RE#\1.\2#")"
  local patch="$(echo $2 | sed -e "s#$RE#\3#")"

  # The binary version is majMin (e.g. "2.12") if
  #  - there's no suffix            : 2.12.0, 2.12.1
  #  - the suffix starts with "-bin": 2.12.0-bin-M1
  #  - the patch version is > 0     : 2.12.1-M1, 1.12.3-RC2, 2.12.1-sha-nightly, 2.12.2-SNAPSHOT
  #
  # Otherwise, the binary version is the full version: 2.12.0-M1, 2.12.0-RC2, 2.12.0-sha-nightly, 2.12.0-SNAPSHOT
  #
  # Adapted from sbt: https://github.com/sbt/sbt/blob/0.13.8/util/cross/src/main/input_sources/CrossVersionUtil.scala#L39
  #
  # Note: during the pre-release cycle of a major release (e.g. before 2.12.0), the SCALA_BINARY_VER of nightly / SNAPSHOT
  # versions is the full version, e.g. 2.12.0-sha-nightly, so modules are always re-built. This is in line with what sbt
  # does: for example, with scalaVersion := "2.12.0-SNAPSHOT", sbt will resolve scala-xml as scala-xml_2.12.0-SNAPSHOT.
  # Once the 2.12.0 release is out, the binary version is 2.12 for all versions (e.g. for 2.12.1-sha-nightly).

  if [[ "$3" == "" || "${3:0:4}" == "-bin" || "$patch" != "0" ]]; then
    echo "$majMin"
  else
    echo "$1"
  fi
}

determineScalaVersion() {
  cd $WORKSPACE
  parseScalaProperties "versions.properties"
  echo "repo_ref=2.12.x" >> $baseDir/jenkins.properties # for the -dist downstream jobs that build the actual archives


  # each of the branches below defines the following vars: SCALA_VER_BASE, SCALA_VER_SUFFIX, SCALADOC_SOURCE_LINKS_VER, publishToSonatype
  if [ -z "$SCALA_VER_BASE" ]; then
    echo "No SCALA_VER_BASE specified."

    scalaTag=$(git describe --tag --exact-match ||:)

    if [ -z "$scalaTag" ]
    then
      echo "No tag found, building nightly snapshot."
      parseScalaProperties "build.number"
      SCALA_VER_BASE="$version_major.$version_minor.$version_patch"
      SCALA_VER_SUFFIX="-$(git rev-parse --short HEAD)-nightly"
      SCALADOC_SOURCE_LINKS_VER=$(git rev-parse HEAD)

      # TODO: publish nightly snapshot using this script - currently it's a separate jenkins job still running at EPFL.
      publishToSonatype="no"
    else
      echo "HEAD is tagged as $scalaTag."
      # borrowed from https://github.com/cloudflare/semver_bash/blob/master/semver.sh
      local RE='v*\([0-9]*\)[.]\([0-9]*\)[.]\([0-9]*\)\([0-9A-Za-z-]*\)' # don't change this to make it more accurate, it's not worth it
      SCALA_VER_BASE="$(echo $scalaTag | sed -e "s#$RE#\1.\2.\3#")"
      SCALA_VER_SUFFIX="$(echo $scalaTag | sed -e "s#$RE#\4#")"
      SCALADOC_SOURCE_LINKS_VER=$scalaTag

      if [ "$SCALA_VER_BASE" == "$scalaTag" ]; then
        echo "Could not parse version $scalaTag"
        exit 1
      fi
      publishToSonatype=${publishToSonatype-"yes"} # unless forced previously, publish
    fi
  else
    publishToSonatype=${publishToSonatype-"yes"} # unless forced previously, publish
    # if version base/suffix are provided, we assume a corresponding tag exists for the scaladoc source links
    SCALADOC_SOURCE_LINKS_VER="v$SCALA_VER_BASE$SCALA_VER_SUFFIX"
  fi

  SCALA_VER="$SCALA_VER_BASE$SCALA_VER_SUFFIX"
  SCALA_BINARY_VER=$(scalaVerToBinary $SCALA_VER $SCALA_VER_BASE $SCALA_VER_SUFFIX)

  echo "version=$SCALA_VER" >> $baseDir/jenkins.properties
  echo "sbtDistVersionOverride=-Dproject.version=$SCALA_VER" >> $baseDir/jenkins.properties

  scalaVersionTasks=('set every scalaVersion := "'$SCALA_VER'"')

  echo "Building Scala $SCALA_VER."
}

deriveVersion() {
  update $1 $2 $3 &> /dev/null
  echo "$(git describe --tag --match=v* | cut -dv -f2)-nightly"
}

deriveVersionAnyTag() {
  update $1 $2 $3 &> /dev/null
  echo "$(git describe --tag | cut -dv -f2)-nightly"
}

# determineScalaVersion must have been called
deriveModuleVersions() {
  if [ "$moduleVersioning" == "versions.properties" ]; then
    # use versions.properties as defaults when no version specified on the command line
                  XML_VER=${XML_VER-$scala_xml_version_number}
              PARSERS_VER=${PARSERS_VER-$scala_parser_combinators_version_number}
                SWING_VER=${SWING_VER-$scala_swing_version_number}
              PARTEST_VER=${PARTEST_VER-$partest_version_number}
           SCALACHECK_VER=${SCALACHECK_VER-$scalacheck_version_number}

                  XML_REF="v$XML_VER"
              PARSERS_REF="v$PARSERS_VER"
                SWING_REF="v$SWING_VER"
              PARTEST_REF="v$PARTEST_VER"
           SCALACHECK_REF="$SCALACHECK_VER" # no `v` in their tags
   else
    # use HEAD as default when no revision is specified on the command line
                 XML_REF=${XML_REF-"HEAD"}
             PARSERS_REF=${PARSERS_REF-"HEAD"}
               SWING_REF=${SWING_REF-"HEAD"}
             PARTEST_REF=${PARTEST_REF-"HEAD"}
          SCALACHECK_REF=${SCALACHECK_REF-"HEAD"}

                 XML_VER=$(deriveVersion scala scala-xml "$XML_REF")
             PARSERS_VER=$(deriveVersion scala scala-parser-combinators "$PARSERS_REF")
               SWING_VER=$(deriveVersion scala scala-swing "$SWING_REF")
             PARTEST_VER=$(deriveVersion scala scala-partest "$PARTEST_REF")
          SCALACHECK_VER=$(deriveVersionAnyTag rickynils scalacheck "$SCALACHECK_REF")
  fi

  echo "Module versions (versioning strategy: $moduleVersioning):"
  echo "PARSERS          = $PARSERS_VER at $PARSERS_REF"
  echo "PARTEST          = $PARTEST_VER at $PARTEST_REF"
  echo "SCALACHECK       = $SCALACHECK_VER at $SCALACHECK_REF"
  echo "SWING            = $SWING_VER at $SWING_REF"
  echo "XML              = $XML_VER at $XML_REF"

}

createNetrcFile() {
  local netrcFile=$HOME/`basename $1`-netrc
  grep 'host=' $1 | sed 's/host=\(.*\)/machine \1/'          >  $netrcFile
  grep 'user=' $1 | sed 's/user=\(.*\)/login \1/'            >> $netrcFile
  grep 'password=' $1 | sed 's/password=\(.*\)/password \1/' >> $netrcFile
}

removeExistingBuilds() {
  createNetrcFile "$HOME/.credentials-private-repo"
  local netrcFile="$HOME/.credentials-private-repo-netrc"

  local storageApiUrl=`echo $releaseTempRepoUrl | sed 's/\(scala-release-temp\)/api\/storage\/\1/'`
  local scalaLangModules=`curl -s $storageApiUrl/org/scala-lang | jq -r '.children | .[] | "org/scala-lang" + .uri' | grep -v actors-migration`

  for module in "org/scalacheck" $scalaLangModules; do
    local artifacts=`curl -s $storageApiUrl/$module | jq -r ".children | .[] | select(.uri | contains(\"$SCALA_VER\")) | .uri"`
    for artifact in $artifacts; do
      echo "Deleting $releaseTempRepoUrl$module$artifact"
      curl -s --netrc-file $netrcFile -X DELETE $releaseTempRepoUrl$module$artifact
    done
  done
}

constructUpdatedModuleVersions() {
  updatedModuleVersions=()

  # force the new module versions for building the core. these may be different from the values in versions.properties,
  # either because the variables (XML_VER) were provided, or because we're building the modules from HEAD.
  # in the common case, the values are the same as in versions.properties.
  updatedModuleVersions=("${updatedModuleVersions[@]}" "-Dscala-parser-combinators.version.number=$PARSERS_VER")
  updatedModuleVersions=("${updatedModuleVersions[@]}" "-Dscala-swing.version.number=$SWING_VER")
  updatedModuleVersions=("${updatedModuleVersions[@]}" "-Dscala-xml.version.number=$XML_VER")

  updatedModuleVersions=("${updatedModuleVersions[@]}" "-Dpartest.version.number=$PARTEST_VER")
  updatedModuleVersions=("${updatedModuleVersions[@]}" "-Dscalacheck.version.number=$SCALACHECK_VER")

  # allow overriding the jline version using a jenkins build parameter
  if [ ! -z "$JLINE_VER" ]     ; then updatedModuleVersions=("${updatedModuleVersions[@]}" "-Djline.version=$JLINE_VER"); fi

  if [ ! -z "$SCALA_BINARY_VER" ]; then updatedModuleVersions=("${updatedModuleVersions[@]}" "-Dscala.binary.version=$SCALA_BINARY_VER"); fi
}

# build locker (scala + modules) and quick, publishing everything to private-repo
bootstrap() {
  echo "### Bootstrapping"

  cd $WORKSPACE

  #### (Optional) STARR.
  if [ ! -z "$STARR_REF" ]; then
      echo "### Building STARR"

      STARR_DIR=./scala-starr
      STARR_VER_SUFFIX="-$(git rev-parse --short $STARR_REF)-nightly"
      STARR_VER=$SCALA_VER_BASE$STARR_VER_SUFFIX
      rm -rf "$STARR_DIR"
      (
        git clone --reference $WORKSPACE/.git $WORKSPACE/.git $STARR_DIR
        cd $STARR_DIR
        git co $STARR_REF
        ant -Dmaven.version.number=$STARR_VER\
            -Dremote.snapshot.repository=NOPE\
            -Dremote.release.repository=$releaseTempRepoUrl\
            -Drepository.credentials.id=$releaseTempRepoCred\
            -Dscalac.args.optimise=-Yopt:l:classpath\
            -Ddocs.skip=1\
            -Dlocker.skip=1\
            $publishStarrPrivateTask >> $baseDir/logs/builds 2>&1
      )
  fi

  #### LOCKER

  echo "### Building locker"

  # for bootstrapping, publish core (or at least smallest subset we can get away with)
  # so that we can build modules with this version of Scala and publish them locally
  # must publish under $SCALA_VER so that the modules will depend on this (binary) version of Scala
  # publish more than just core: partest needs scalap
  # in sabbus lingo, the resulting Scala build will be used as starr to build the released Scala compiler
  if [ ! -z "$STARR_VER" ]; then SET_STARR=-Dstarr.version=$STARR_VER; fi
  ant -Dmaven.version.number=$SCALA_VER\
      -Dremote.snapshot.repository=NOPE\
      $SET_STARR\
      -Dremote.release.repository=$releaseTempRepoUrl\
      -Drepository.credentials.id=$releaseTempRepoCred\
      -Dscalac.args.optimise=-Yopt:l:classpath\
      -Ddocs.skip=1\
      -Dlocker.skip=1\
      $publishLockerPrivateTask >> $baseDir/logs/builds 2>&1

  echo "### Building modules using locker"

  # build, test and publish modules with this core
  # publish to our internal repo (so we can resolve the modules in the scala build below)
  # we only need to build the modules necessary to build Scala itself
  # since the version of locker and quick are the same
  buildModules

  constructUpdatedModuleVersions

  #### QUICK

  echo "### Bootstrapping Scala using locker"

  # # TODO: close all open staging repos so that we can be reasonably sure the only open one we see after publishing below is ours
  # # the ant call will create a new one
  #
  # Rebuild Scala with these modules so that all binary versions are consistent.
  # Update versions.properties to new modules.
  # Sanity check: make sure the Scala test suite passes / docs can be generated with these modules.
  # don't skip locker (-Dlocker.skip=1), or stability will fail
  # overwrite "locker" version of scala at private-repo with bootstrapped version
  cd $baseDir
  rm -rf build/ # must leave everything else in $baseDir for downstream jobs

  ant -Dstarr.version=$SCALA_VER\
      -Dextra.repo.url=$releaseTempRepoUrl\
      -Dmaven.version.suffix=$SCALA_VER_SUFFIX\
      ${updatedModuleVersions[@]} \
      -Dupdate.versions=1\
      -Dscaladoc.git.commit=$SCALADOC_SOURCE_LINKS_VER\
      -Dremote.snapshot.repository=NOPE\
      -Dremote.release.repository=$releaseTempRepoUrl\
      -Drepository.credentials.id=$releaseTempRepoCred\
      -Dscalac.args.optimise=-Yopt:l:classpath\
      $antBuildTask $publishPrivateTask

  # clear ivy cache (and to be sure, local as well), so the next round of sbt builds sees the fresh scala
  rm -rf $baseDir/ivy2

  # TODO: create PR with following commit (note that release will have been tagged already)
  # git commit versions.properties -m"Bump versions.properties for $SCALA_VER."
}

# assumes we just bootstrapped, and current directory is $baseDir
# publishes locker to sonatype, then builds modules again (those for which version numbers were provided),
# and publishes those to sonatype as well
# finally, the staging repos are closed
publishSonatype() {
  # stage to sonatype, along with all modules -Dmaven.version.suffix/-Dbuild.release not necessary,
  # since we're just publishing an existing build
  echo "### Publishing core to sonatype"
  ant -Dmaven.version.number=$SCALA_VER $publishSonatypeTaskCore

  echo "### Publishing modules to sonatype"
  # build/test/publish scala core modules to sonatype (this will start a new staging repo)
  # (was hoping we could make everything go to the same staging repo, but it's not timing that causes two staging repos to be opened)
  # NOTE: only publish those for which versions are set
  # test and publish to sonatype, assuming you have ~/.sbt/0.13/sonatype.sbt and ~/.sbt/0.13/plugin/gpg.sbt
  buildPublishedModules

  open=$(st_stagingReposOpen)
  allOpenUrls=$(echo $open | jq  '.repositoryURI' | tr -d \")
  allOpen=$(echo $open | jq  '.repositoryId' | tr -d \")

  echo "Closing open repos: $allOpen"

  for repo in $allOpen; do st_stagingRepoClose $repo; done

  echo "Closed sonatype staging repos: $allOpenUrls."
}


#### MAIN

determineScalaVersion

deriveModuleVersions

removeExistingBuilds

bootstrap

if [ "$publishToSonatype" == "yes" ]
  then publishSonatype
fi