diff options
Diffstat (limited to 'src/main/java/com/google/devtools/build/lib/bazel/rules/java/java_stub_template.txt')
| -rw-r--r-- | src/main/java/com/google/devtools/build/lib/bazel/rules/java/java_stub_template.txt | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/bazel/rules/java/java_stub_template.txt b/src/main/java/com/google/devtools/build/lib/bazel/rules/java/java_stub_template.txt new file mode 100644 index 0000000000..a17246f81d --- /dev/null +++ b/src/main/java/com/google/devtools/build/lib/bazel/rules/java/java_stub_template.txt @@ -0,0 +1,195 @@ +#!/bin/bash --posix +# Copyright 2014 Google Inc. All rights reserved. +# +# 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. +# +# This script was generated from java_stub_template.txt. Please +# don't edit it directly. +# +# If present, these flags should either be at the beginning of the command +# line, or they should be wrapped in a --wrapper_script_flag=FLAG argument. +# +# --debug Launch the JVM in remote debugging mode listening +# --debug=<port> to the specified port or the port set in the +# DEFAULT_JVM_DEBUG_PORT environment variable (e.g. +# 'export DEFAULT_JVM_DEBUG_PORT=8000') or else the +# default port of 5005. The JVM starts suspended +# unless the DEFAULT_JVM_DEBUG_SUSPEND environment +# variable is set to 'n'. +# --main_advice=<class> Run an alternate main class with the usual main +# program and arguments appended as arguments. +# --main_advice_classpath=<classpath> +# Prepend additional class path entries. +# --jvm_flag=<flag> Pass <flag> to the "java" command itself. +# <flag> may contain spaces. Can be used multiple times. +# --jvm_flags=<flags> Pass space-separated flags to the "java" command +# itself. Can be used multiple times. +# --singlejar Start the program from the packed-up deployment +# jar rather than from the classpath. +# --print_javabin Print the location of java executable binary and exit. +# +# The remainder of the command line is passed to the program. + +# Make it easy to insert 'set -x' or similar commands when debugging problems with this script. +eval "$JAVA_STUB_DEBUG" + +# Prevent problems where the caller has exported CLASSPATH, causing our +# computed value to be copied into the environment and double-counted +# against the argv limit. +unset CLASSPATH + +JVM_FLAGS_CMDLINE=() + +# Processes an argument for the wrapper. Returns 0 if the given argument +# was recognized as an argument for this wrapper, and 1 if it was not. +function process_wrapper_argument() { + case "$1" in + --debug) JVM_DEBUG_PORT="${DEFAULT_JVM_DEBUG_PORT:-5005}" ;; + --debug=*) JVM_DEBUG_PORT="${1#--debug=}" ;; + --main_advice=*) MAIN_ADVICE="${1#--main_advice=}" ;; + --main_advice_classpath=*) MAIN_ADVICE_CLASSPATH="${1#--main_advice_classpath=}" ;; + --jvm_flag=*) JVM_FLAGS_CMDLINE+=( "${1#--jvm_flag=}" ) ;; + --jvm_flags=*) JVM_FLAGS_CMDLINE+=( ${1#--jvm_flags=} ) ;; + --singlejar) SINGLEJAR=1 ;; + --print_javabin) PRINT_JAVABIN=1 ;; + *) + return 1 ;; + esac + return 0 +} + +die() { + printf "%s: $1\n" "$0" "${@:2}" >&2 + exit 1 +} + +# Parse arguments sequentially until the first unrecognized arg is encountered. +# Scan the remaining args for --wrapper_script_flag=X options and process them. +ARGS=() +for ARG in "$@"; do + if [[ "$ARG" == --wrapper_script_flag=* ]]; then + process_wrapper_argument "${ARG#--wrapper_script_flag=}" \ + || die "invalid wrapper argument '%s'" "$ARG" + elif [[ "${#ARGS}" > 0 ]] || ! process_wrapper_argument "$ARG"; then + ARGS+=( "$ARG" ) + fi +done + +# Find our runfiles tree. We need this to construct the classpath +# (unless --singlejar was passed). +# +# Call this program X. X was generated by a java_binary or java_test rule. +# X may be invoked in many ways: +# 1a) directly by a user, with $0 in the output tree +# 1b) via 'bazel run' (similar to case 1a) +# 2) directly by a user, with $0 in X's runfiles tree +# 3) by another program Y which has a data dependency on X, with $0 in Y's runfiles tree +# 4) via 'bazel test' +# 5) by a genrule cmd, with $0 in the output tree +# 6) case 3 in the context of a genrule +# +# For case 1, $0 will be a regular file, and the runfiles tree will be +# at $0.runfiles. +# For case 2 or 3, $0 will be a symlink to the file seen in case 1. +# For case 4, $JAVA_RUNFILES and $TEST_SRCDIR should already be set. +# Case 5 is handled like case 1. +# Case 6 is handled like case 3. + +case "$0" in + /*) self="$0" ;; + *) self="$PWD/$0" ;; +esac + +if [[ "$SINGLEJAR" != 1 || "%needs_runfiles%" == 1 ]]; then + if [[ -z "$JAVA_RUNFILES" ]]; then + while true; do + if [[ -e "$self.runfiles" ]]; then + JAVA_RUNFILES="$self.runfiles" + break + fi + if [[ $self == *.runfiles/* ]]; then + JAVA_RUNFILES="${self%.runfiles/*}.runfiles" + # don't break; this value is only a last resort for case 6b + fi + if [[ ! -L "$self" ]]; then + break + fi + readlink="$(readlink "$self")" + if [[ "$readlink" = /* ]]; then + self="$readlink" + else + # resolve relative symlink + self="${self%/*}/$readlink" + fi + done + if [[ -n "$JAVA_RUNFILES" ]]; then + export TEST_SRCDIR=${TEST_SRCDIR:-$JAVA_RUNFILES} + elif [[ -f "${self}_deploy.jar" && "%needs_runfiles%" == 0 ]]; then + SINGLEJAR=1; + else + die 'Cannot locate runfiles directory. (Set $JAVA_RUNFILES to inhibit searching.)' + fi + fi +fi + +# Set JAVABIN to the path to the JVM launcher. +%javabin% + +if [[ "$PRINT_JAVABIN" == 1 || "%java_start_class%" == "--print_javabin" ]]; then + echo -n "$JAVABIN" + exit 0 +fi + +if [[ "$SINGLEJAR" == 1 ]]; then + CLASSPATH="${self}_deploy.jar" + # Check for the deploy jar now. If it doesn't exist, we can print a + # more helpful error message than the JVM. + [[ -r "$CLASSPATH" ]] \ + || die "Option --singlejar was passed, but %s does not exist.\n (You may need to build it explicitly.)" "$CLASSPATH" +else + # Create the shortest classpath we can, by making it relative if possible. + RUNPATH="${JAVA_RUNFILES}/" + RUNPATH="${RUNPATH#$PWD/}" + CLASSPATH=%classpath% +fi + +if [[ -n "$JVM_DEBUG_PORT" ]]; then + JVM_DEBUG_SUSPEND=${DEFAULT_JVM_DEBUG_SUSPEND:-"y"} + JVM_DEBUG_FLAGS="-agentlib:jdwp=transport=dt_socket,server=y,suspend=${JVM_DEBUG_SUSPEND},address=${JVM_DEBUG_PORT}" +fi + +if [[ -n "$MAIN_ADVICE_CLASSPATH" ]]; then + CLASSPATH="${MAIN_ADVICE_CLASSPATH}:${CLASSPATH}" +fi + +# Check if TEST_TMPDIR is available to use for scratch. +if [[ -n "$TEST_TMPDIR" && -d "$TEST_TMPDIR" ]]; then + JVM_FLAGS+=" -Djava.io.tmpdir=$TEST_TMPDIR" +fi + +ARGS=( + ${JVM_DEBUG_FLAGS} + ${JVM_FLAGS} + %jvm_flags% + "${JVM_FLAGS_CMDLINE[@]}" + ${MAIN_ADVICE} + %java_start_class% + "${ARGS[@]}") + +# Linux per-arg limit MAX_ARG_STRLEN == 128k! +if (("${#CLASSPATH}" > 120000)); then + set +o posix # Enable process substitution. + exec $JAVABIN -classpath @<(echo $CLASSPATH) "${ARGS[@]}" +else + exec $JAVABIN -classpath $CLASSPATH "${ARGS[@]}" +fi |