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#!/bin/bash
#
# Copyright (C) 2015 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.
#
#
# Default setting
#
if [ -z "$TMPDIR" ]; then
TMPDIR="/tmp"
fi
if [ -z "$SERVER_NB_COMPILE" ]; then
SERVER_NB_COMPILE=6
fi
if [ -z "$SERVER_TIMEOUT" ]; then
SERVER_TIMEOUT=60
fi
#
# Static setting
#
set -o nounset
# Release code (3 digits) followed by the sub-release code (3 digits)
JACK_ID=002009
SERVER_PRG="$JACK_VM_COMMAND -cp $JACK_JAR com.android.jack.server.Server"
SERVER_DIR="$TMPDIR/jack-$USER"
SERVER_FIFO="$SERVER_DIR/jack-$JACK_ID.cmd"
SERVER_LOCK="$SERVER_DIR/jack-$JACK_ID.lock"
SERVER_LOG="$SERVER_DIR/jack-$JACK_ID.log"
JACK_DIR="$SERVER_DIR/jack-task-$$/"
JACK_OUT="$JACK_DIR/out"
JACK_ERR="$JACK_DIR/err"
JACK_EXIT="$JACK_DIR/exit"
JACK_CLI="$JACK_DIR/cli"
JACK_PWD="$PWD"
#
# Prepare server
#
mkdir -m 700 "$SERVER_DIR" 2>/dev/null
mkfifo -m 600 "$SERVER_FIFO" 2>/dev/null
#
# Launch the server if needed
#
SERVER_TMP_LOCK=$SERVER_LOCK.$$
trap 'rm -f $SERVER_TMP_LOCK 2>/dev/null;' EXIT
while true; do
echo $$ > "$SERVER_TMP_LOCK" 2>/dev/null
if ln "$SERVER_TMP_LOCK" "$SERVER_LOCK" 2>/dev/null; then
rm "$SERVER_TMP_LOCK"
echo "Launching background server" $SERVER_PRG
$SERVER_PRG $SERVER_NB_COMPILE $SERVER_TIMEOUT "$SERVER_FIFO" "$SERVER_LOCK" >$SERVER_LOG 2>&1 &
echo $! > "$SERVER_LOCK"
break
else
CANDIDATE_PID=`cat $SERVER_LOCK`
if [ $? -eq 0 ]; then
if kill -0 $CANDIDATE_PID 2>/dev/null; then
# Server seems to be alive, go ahead
rm "$SERVER_TMP_LOCK" 2>/dev/null
break
else
# Stale lock, clean and retry again
# Unfortunately, there is a race condition here leading to launching several
# servers. We are living with that.
echo "Stale lock detected, cleaning"
rm "$SERVER_LOCK" "$SERVER_TMP_LOCK" 2>/dev/null
fi
else
# Someone is removing or echoing inside the lock, try again
rm "$SERVER_TMP_LOCK" 2>/dev/null
fi
# Calm down the retry
sleep 1
fi
done
#
# Prepare compilation
#
# Cleanup
trap 'rm -f $JACK_OUT $JACK_ERR $JACK_EXIT $JACK_CLI 2>/dev/null; rmdir $JACK_DIR 2>/dev/null' EXIT
# Create fifo for a task
mkdir -m 700 "$JACK_DIR"
mkfifo -m 600 "$JACK_OUT"
mkfifo -m 600 "$JACK_ERR"
mkfifo -m 600 "$JACK_EXIT"
# Try to cleanup if interrupted
trap 'rm $JACK_EXIT; kill -9 $PID_OUT $PID_ERR; wait $PID_OUT; wait $PID_ERR; exit -1' SIGHUP SIGINT SIGQUIT SIGTERM
# Redirect output and error
cat <"$JACK_OUT" >&1 &
PID_OUT=$!
cat <"$JACK_ERR" >&2 &
PID_ERR=$!
# Prepare the working directory and command line
echo -n \"$PWD\" "" >"$JACK_CLI"
for i in "$@"; do
echo -n \"$i\" "" >>"$JACK_CLI"
done
echo >>"$JACK_CLI"
#
# Launch the compilation
#
# Launch compilation
echo "+ $JACK_OUT $JACK_ERR $JACK_EXIT $JACK_CLI" >>"$SERVER_FIFO"
EXIT_CODE=$(cat "$JACK_EXIT")
if [ -z "$EXIT_CODE" ]; then
EXIT_CODE=-1;
fi
# Wait for termination
wait $PID_OUT
wait $PID_ERR
# Exit
exit $EXIT_CODE
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