diff --git a/Android.bp b/Android.bp
index d42df23..8a2f730 100644
--- a/Android.bp
+++ b/Android.bp
@@ -53,7 +53,7 @@
 
 java_binary_host {
     name: "d8",
-    main_class: "com.android.tools.r8.D8",
+    wrapper: "d8",
     static_libs: ["r8lib"],
     target: {
         windows: {
@@ -65,7 +65,7 @@
 
 java_binary_host {
     name: "r8-compat-proguard",
-    main_class: "com.android.tools.r8.compatproguard.CompatProguard",
+    wrapper: "r8-compat-proguard",
     static_libs: ["r8lib"],
 }
 
diff --git a/d8 b/d8
new file mode 100755
index 0000000..3a1fe80
--- /dev/null
+++ b/d8
@@ -0,0 +1,89 @@
+#!/bin/bash
+#
+# Copyright (C) 2017 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Set up prog to be the path of this script, including following symlinks,
+# and set up progdir to be the fully-qualified pathname of its directory.
+prog="$0"
+while [ -h "${prog}" ]; do
+    newProg=`/bin/ls -ld "${prog}"`
+    newProg=`expr "${newProg}" : ".* -> \(.*\)$"`
+    if expr "x${newProg}" : 'x/' >/dev/null; then
+        prog="${newProg}"
+    else
+        progdir=`dirname "${prog}"`
+        prog="${progdir}/${newProg}"
+    fi
+done
+oldwd=`pwd`
+progdir=`dirname "${prog}"`
+cd "${progdir}"
+progdir=`pwd`
+prog="${progdir}"/`basename "${prog}"`
+cd "${oldwd}"
+
+jarfile=d8.jar
+libdir="$progdir"
+
+if [ ! -r "$libdir/$jarfile" ]; then
+    # set d8.jar location for the SDK case
+    libdir="$libdir/lib"
+fi
+
+
+if [ ! -r "$libdir/$jarfile" ]; then
+    # set d8.jar location for the Android tree case
+    libdir=`dirname "$progdir"`/framework
+fi
+
+if [ ! -r "$libdir/$jarfile" ]; then
+    echo `basename "$prog"`": can't find $jarfile"
+    exit 1
+fi
+
+# By default, give d8 a max heap size of 2 gigs. This can be overridden
+# by using a "-J" option (see below).
+defaultMx="-Xmx2G"
+
+# The following will extract any initial parameters of the form
+# "-J<stuff>" from the command line and pass them to the Java
+# invocation (instead of to d8). This makes it possible for you to add
+# a command-line parameter such as "-JXmx256M" in your scripts, for
+# example. "java" (with no args) and "java -X" give a summary of
+# available options.
+
+declare -a javaOpts=()
+
+while expr "x$1" : 'x-J' >/dev/null; do
+    opt=`expr "x$1" : 'x-J\(.*\)'`
+    javaOpts+=("-${opt}")
+    if expr "x${opt}" : "xXmx[0-9]" >/dev/null; then
+        defaultMx="no"
+    fi
+    shift
+done
+
+if [ "${defaultMx}" != "no" ]; then
+    javaOpts+=("${defaultMx}")
+fi
+
+if [ "$OSTYPE" = "cygwin" ]; then
+    # For Cygwin, convert the jarfile path into native Windows style.
+    jarpath=`cygpath -w "$libdir/$jarfile"`
+else
+    jarpath="$libdir/$jarfile"
+fi
+
+exec java "${javaOpts[@]}" -cp "$jarpath" com.android.tools.r8.D8 "$@"
diff --git a/d8-compat-dx b/d8-compat-dx
new file mode 100755
index 0000000..0b13333
--- /dev/null
+++ b/d8-compat-dx
@@ -0,0 +1,89 @@
+#!/bin/bash
+#
+# Copyright (C) 2017 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Set up prog to be the path of this script, including following symlinks,
+# and set up progdir to be the fully-qualified pathname of its directory.
+prog="$0"
+while [ -h "${prog}" ]; do
+    newProg=`/bin/ls -ld "${prog}"`
+    newProg=`expr "${newProg}" : ".* -> \(.*\)$"`
+    if expr "x${newProg}" : 'x/' >/dev/null; then
+        prog="${newProg}"
+    else
+        progdir=`dirname "${prog}"`
+        prog="${progdir}/${newProg}"
+    fi
+done
+oldwd=`pwd`
+progdir=`dirname "${prog}"`
+cd "${progdir}"
+progdir=`pwd`
+prog="${progdir}"/`basename "${prog}"`
+cd "${oldwd}"
+
+jarfile=d8-compat-dx.jar
+libdir="$progdir"
+
+if [ ! -r "$libdir/$jarfile" ]; then
+    # set d8.jar location for the SDK case
+    libdir="$libdir/lib"
+fi
+
+
+if [ ! -r "$libdir/$jarfile" ]; then
+    # set d8.jar location for the Android tree case
+    libdir=`dirname "$progdir"`/framework
+fi
+
+if [ ! -r "$libdir/$jarfile" ]; then
+    echo `basename "$prog"`": can't find $jarfile"
+    exit 1
+fi
+
+# By default, give d8 a max heap size of 2 gigs. This can be overridden
+# by using a "-J" option (see below).
+defaultMx="-Xmx2G"
+
+# The following will extract any initial parameters of the form
+# "-J<stuff>" from the command line and pass them to the Java
+# invocation (instead of to d8). This makes it possible for you to add
+# a command-line parameter such as "-JXmx256M" in your scripts, for
+# example. "java" (with no args) and "java -X" give a summary of
+# available options.
+
+javaOpts=""
+
+while expr "x$1" : 'x-J' >/dev/null; do
+    opt=`expr "x$1" : 'x-J\(.*\)'`
+    javaOpts="${javaOpts} -${opt}"
+    if expr "x${opt}" : "xXmx[0-9]" >/dev/null; then
+        defaultMx="no"
+    fi
+    shift
+done
+
+if [ "${defaultMx}" != "no" ]; then
+    javaOpts="${javaOpts} ${defaultMx}"
+fi
+
+if [ "$OSTYPE" = "cygwin" ]; then
+    # For Cygwin, convert the jarfile path into native Windows style.
+    jarpath=`cygpath -w "$libdir/$jarfile"`
+else
+    jarpath="$libdir/$jarfile"
+fi
+
+exec java "${javaOpts[@]}" -cp "$jarpath" com.android.tools.r8.compatdx.CompatDx "$@"
diff --git a/r8-compat-proguard b/r8-compat-proguard
new file mode 100755
index 0000000..4cc7cc3
--- /dev/null
+++ b/r8-compat-proguard
@@ -0,0 +1,89 @@
+#!/bin/bash
+#
+# Copyright (C) 2017 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Set up prog to be the path of this script, including following symlinks,
+# and set up progdir to be the fully-qualified pathname of its directory.
+prog="$0"
+while [ -h "${prog}" ]; do
+    newProg=`/bin/ls -ld "${prog}"`
+    newProg=`expr "${newProg}" : ".* -> \(.*\)$"`
+    if expr "x${newProg}" : 'x/' >/dev/null; then
+        prog="${newProg}"
+    else
+        progdir=`dirname "${prog}"`
+        prog="${progdir}/${newProg}"
+    fi
+done
+oldwd=`pwd`
+progdir=`dirname "${prog}"`
+cd "${progdir}"
+progdir=`pwd`
+prog="${progdir}"/`basename "${prog}"`
+cd "${oldwd}"
+
+jarfile=r8-compat-proguard.jar
+libdir="$progdir"
+
+if [ ! -r "$libdir/$jarfile" ]; then
+    # set r8.jar location for the SDK case
+    libdir="$libdir/lib"
+fi
+
+
+if [ ! -r "$libdir/$jarfile" ]; then
+    # set r8.jar location for the Android tree case
+    libdir=`dirname "$progdir"`/framework
+fi
+
+if [ ! -r "$libdir/$jarfile" ]; then
+    echo `basename "$prog"`": can't find $jarfile"
+    exit 1
+fi
+
+# By default, give r8 a max heap size of 2 gigs. This can be overridden
+# by using a "-J" option (see below).
+defaultMx="-Xmx2G"
+
+# The following will extract any initial parameters of the form
+# "-J<stuff>" from the command line and pass them to the Java
+# invocation (instead of to r8). This makes it possible for you to add
+# a command-line parameter such as "-JXmx256M" in your scripts, for
+# example. "java" (with no args) and "java -X" give a summary of
+# available options.
+
+declare -a javaOpts=()
+
+while expr "x$1" : 'x-J' >/dev/null; do
+    opt=`expr "x$1" : 'x-J\(.*\)'`
+    javaOpts+=("-${opt}")
+    if expr "x${opt}" : "xXmx[0-9]" >/dev/null; then
+        defaultMx="no"
+    fi
+    shift
+done
+
+if [ "${defaultMx}" != "no" ]; then
+    javaOpts+=("${defaultMx}")
+fi
+
+if [ "$OSTYPE" = "cygwin" ]; then
+    # For Cygwin, convert the jarfile path into native Windows style.
+    jarpath=`cygpath -w "$libdir/$jarfile"`
+else
+    jarpath="$libdir/$jarfile"
+fi
+
+exec java "${javaOpts[@]}" -cp "$jarpath" com.android.tools.r8.compatproguard.CompatProguard "$@"
diff --git a/retrace-r8.sh b/retrace-r8.sh
new file mode 100755
index 0000000..b68ecce
--- /dev/null
+++ b/retrace-r8.sh
@@ -0,0 +1,69 @@
+#!/bin/bash
+#
+# Copyright (C) 2019 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Call retrace with the r8 map file.
+#
+# Usage:
+#
+#     retrace-r8.sh [-verbose] [<stacktrace_file>]
+#
+# Read from stdin if stacktrace file is not specified.
+
+# Set up prog to be the path of this script, including following symlinks,
+# and set up progdir to be the fully-qualified pathname of its directory.
+prog="$0"
+while [ -h "${prog}" ]; do
+    newProg=`/bin/ls -ld "${prog}"`
+    newProg=`expr "${newProg}" : ".* -> \(.*\)$"`
+    if expr "x${newProg}" : 'x/' >/dev/null; then
+        prog="${newProg}"
+    else
+        progdir=`dirname "${prog}"`
+        prog="${progdir}/${newProg}"
+    fi
+done
+oldwd=`pwd`
+progdir=`dirname "${prog}"`
+cd "${progdir}"
+progdir=`pwd`
+prog="${progdir}"/`basename "${prog}"`
+cd "${oldwd}"
+
+retracedir="${progdir}"
+retracejar="r8.jar"
+
+if [ ! -r "${retracedir}/${retracejar}" ]; then
+    echo `basename "$prog"`": can't find ${retracejar}"
+    exit 1
+fi
+
+mapfile="r8.jar.map"
+
+if [ ! -r "${progdir}/${mapfile}" ]; then
+    echo `basename "${prog}"`": can't find ${mapfile}"
+    exit 1
+fi
+
+if [ "$OSTYPE" = "cygwin" ]; then
+    # For Cygwin, convert the scriptfile path into native Windows style.
+    mappath=`cygpath -w "${progdir}/${mapfile}"`
+    retracepath=`cygpath -w "${retracedir}/${retracejar}"`
+else
+    mappath="${progdir}/${mapfile}"
+    retracepath="${retracedir}/${retracejar}"
+fi
+
+exec java -cp "${retracepath}" com.android.tools.r8.retrace.Retrace "${mappath}" "$@"