ivy-classpath

#!/bin/sh
#
# ivy-classpath   by paul phillips   part of sbt-extras
# https://github.com/paulp/sbt-extras
#
# Todo - make it possible to leave out lots more
#

if ! which ivy >/dev/null; then
  cat <<"EOM"
Error: no `ivy` command line program found.

On OSX with homebrew, you can 'brew install ivy', otherwise
save the following as executable 'ivy' and place it on your path.

#!/bin/sh
#

cd /path/to/ivy/distribution && java $JAVA_OPTS -jar ivy-2.2.0.jar "$@"

EOM
  exit 1
fi

prog="$(basename $0)"
unset verbose

while getopts :v opt; do
  case $opt in
    v) verbose=true
  esac
done

# This removes all the options from $@, as getopts doesn't touch it.
# After this, "$@" contains the non-option arguments.
shift $((OPTIND-1))

if [[ $# -eq 0 ]]; then
  cat <<EOM
Usage: $prog [-v] [dependency dependency ...]

Resolves all dependencies through the ivy cache, downloading any required jars.
When complete, echoes a classpath containing all dependencies, including
transitively required ones.  The format to express dependencies is

  org%name%version

Example uses:

  $prog com.typesafe.akka%akka%2.0 play%play_2.9.1%2.0
  $prog org.ow2.asm%asm%latest.release net.databinder%dispatch-http_2.9.1%latest.snapshot
  scala -Ylog-classpath -cp \$($prog com.typesafe.akka%akka-actor%2.0 com.google.guava%guava%11.0.2)

EOM

  exit 0
fi

resolverNames="shared public"
dir="$(mktemp -dt ivyfetch)"
cd $dir

[[ $verbose ]] || echo >&2 "[Working... tail $dir/log for progress.]"

genIvySettings () {
  cat <<EOM
<ivysettings>
  <settings defaultResolver="default"/>
  <include url="\${ivy.default.settings.dir}/ivysettings-public.xml"/>
  <include url="\${ivy.default.settings.dir}/ivysettings-shared.xml"/>
  <include url="\${ivy.default.settings.dir}/ivysettings-local.xml"/>
  <!-- <include url="\${ivy.default.settings.dir}/ivysettings-main-chain.xml"/> -->
  $("$@")
  <include url="\${ivy.default.settings.dir}/ivysettings-default-chain.xml"/>
</ivysettings>
EOM
}

ibiblio() {
  resolverNames="$resolverNames $1"

  cat <<EOM
  <ibiblio name="${1}" m2compatible="true" root="${2}"/>
EOM
}

ibiblioLines () {
  local name="$1"
  local url="$2"
  ibiblio "${name}-releases" "${url}releases/"
  ibiblio "${name}-snapshots" "${url}snapshots/"
}

chainLines () {
  echo '  <chain name="main" dual="true" returnFirst="true" checkmodified="true">'
  for id in $@; do
    echo "    <resolver ref=\"$id\" />"
  done
  echo '  </chain>'
}

ivyChain () {
  echo '<include url="${ivy.default.settings.dir}/ivysettings-shared.xml"/>'
  echo '<resolvers>'

  ibiblioLines oss        https://oss.sonatype.org/content/repositories/
  ibiblioLines typesafe   http://repo.typesafe.com/typesafe/maven-
  ibiblioLines akka       http://repo.akka.io/
  ibiblio      codahale   http://repo.codahale.com/

  chainLines $resolverNames

  echo '</resolvers>'
}

resolveLine () {
  ( IFS="%" && set -- "$1" && printf '  <dependency org="%s" name="%s" rev="%s" force="true" changing="true" />' $* && echo "" )
}

genIvyResolve () {
  cat <<EOM
<ivy-module version="2.0">
<info organisation="org.improving" module="ivy-classpath" />
<dependencies>
$( for dep in "$@"; do resolveLine "$dep" ; done )
</dependencies>
</ivy-module>
EOM
}

runner () {
  # echo >&2 "$@"
  "$@"
}

run () {
  [[ $verbose ]] || exec &>log
  genIvySettings ivyChain >ivysettings.xml
  genIvyResolve "$@" >ivy.xml
  [[ $verbose ]] && cat ivy.xml

  ivy \
    -cachepath $dir/classpath \
    -settings $dir/ivysettings.xml \
    -ivy $dir/ivy.xml
}

( run "$@" )

# and finally, the object of our desire
cat $dir/classpath