57 lines
1.8 KiB
Bash
57 lines
1.8 KiB
Bash
#!/bin/sh
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#
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# Compare javac -Xprint (i.e. see signatures from java point of view)
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# for the given classes.
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#
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# Sample:
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#
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# % SCALA_HOME=/scala/inst/29 SCALA_BUILD=/scala/inst/3 tools/compare-java-sigs 'scala.Predef$'
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#
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# Comparing javac -Xprint for scala.Predef$ based on '/scala/inst/29' and '/scala/inst/3'
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# 3c3
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# < public final class Predef$ extends scala.LowPriorityImplicits implements scala.ScalaObject {
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# ---
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# > public final class Predef$ extends scala.LowPriorityImplicits {
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# 7d6
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# < private final scala.SpecializableCompanion AnyRef;
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# 21,22d19
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# < public scala.SpecializableCompanion AnyRef();
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# <
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# 68a66,67
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# > public scala.runtime.Nothing$ $qmark$qmark$qmark();
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# >
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# 225c224,226
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# < public scala.collection.immutable.StringOps augmentString(java.lang.String x);
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# ---
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# > public scala.runtime.StringFormat any2stringfmt(java.lang.Object x);
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# >
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# > public java.lang.String augmentString(java.lang.String x);
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# 227c228
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# < public java.lang.String unaugmentString(scala.collection.immutable.StringOps x);
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# ---
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# > public java.lang.String unaugmentString(java.lang.String x);
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#
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set -e
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[[ $# -gt 0 ]] || {
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echo "Usage: $(basename $0) <class> <class> ..."
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echo ""
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echo "# Example usage"
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echo "SCALA_HOME=/scala/inst/29 SCALA_BUILD=/scala/inst/3 \\"
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echo " $(basename $0) scala.Function1 scala.runtime.AbstractFunction1"
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exit 0
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}
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home1=$(cd ${SCALA_HOME:-/scala/inst/3} && pwd)
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home2=$(cd ${SCALA_BUILD:-$(dirname $BASH_SOURCE)/../build/pack} && pwd)
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echo "Comparing javac -Xprint for $@ based on '$home1' and '$home2'"
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tmpdir=$(mktemp -dt $(basename $BASH_SOURCE))
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cd $tmpdir
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javac -Xprint -cp $home1:$home1/lib/'*' "$@" > before.txt
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javac -Xprint -cp $home2:$home2/lib/'*' "$@" > after.txt
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diff before.txt after.txt && echo "No differences in javac -Xprint output."
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