kafka

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#!/bin/sh
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#
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# Copyright © 2015-2021 the original authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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#      https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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##############################################################################
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#
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#   Gradle start up script for POSIX generated by Gradle.
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#
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#   Important for running:
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#
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#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
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#       noncompliant, but you have some other compliant shell such as ksh or
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#       bash, then to run this script, type that shell name before the whole
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#       command line, like:
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#
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#           ksh Gradle
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#
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#       Busybox and similar reduced shells will NOT work, because this script
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#       requires all of these POSIX shell features:
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#         * functions;
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#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
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#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
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#         * compound commands having a testable exit status, especially «case»;
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#         * various built-in commands including «command», «set», and «ulimit».
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#
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#   Important for patching:
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#
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#   (2) This script targets any POSIX shell, so it avoids extensions provided
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#       by Bash, Ksh, etc; in particular arrays are avoided.
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#
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#       The "traditional" practice of packing multiple parameters into a
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#       space-separated string is a well documented source of bugs and security
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#       problems, so this is (mostly) avoided, by progressively accumulating
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#       options in "$@", and eventually passing that to Java.
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#
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#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
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#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
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#       see the in-line comments for details.
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#
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#       There are tweaks for specific operating systems such as AIX, CygWin,
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#       Darwin, MinGW, and NonStop.
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#
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#   (3) This script is generated from the Groovy template
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#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
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#       within the Gradle project.
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#
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#       You can find Gradle at https://github.com/gradle/gradle/.
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#
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##############################################################################
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# Attempt to set APP_HOME
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# Resolve links: $0 may be a link
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app_path=$0
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# Need this for daisy-chained symlinks.
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while
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    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
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    [ -h "$app_path" ]
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do
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    ls=$( ls -ld "$app_path" )
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    link=${ls#*' -> '}
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    case $link in             #(
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      /*)   app_path=$link ;; #(
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      *)    app_path=$APP_HOME$link ;;
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    esac
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done
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# This is normally unused
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# shellcheck disable=SC2034
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APP_BASE_NAME=${0##*/}
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# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
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APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
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# Use the maximum available, or set MAX_FD != -1 to use that value.
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MAX_FD=maximum
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warn () {
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    echo "$*"
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} >&2
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die () {
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    echo
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    echo "$*"
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    echo
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    exit 1
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} >&2
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# OS specific support (must be 'true' or 'false').
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cygwin=false
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msys=false
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darwin=false
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nonstop=false
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case "$( uname )" in                #(
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  CYGWIN* )         cygwin=true  ;; #(
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  Darwin* )         darwin=true  ;; #(
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  MSYS* | MINGW* )  msys=true    ;; #(
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  NONSTOP* )        nonstop=true ;;
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esac
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# Loop in case we encounter an error.
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for attempt in 1 2 3; do
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  if [ ! -e "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" ]; then
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    if ! curl -s -S --retry 3 -L -o "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" "https://raw.githubusercontent.com/gradle/gradle/v8.10.0/gradle/wrapper/gradle-wrapper.jar"; then
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      rm -f "$APP_HOME/gradle/wrapper/gradle-wrapper.jar"
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      # Pause for a bit before looping in case the server throttled us.
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      sleep 5
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      continue
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    fi
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  fi
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done
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CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
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# Determine the Java command to use to start the JVM.
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if [ -n "$JAVA_HOME" ] ; then
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    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
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        # IBM's JDK on AIX uses strange locations for the executables
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        JAVACMD=$JAVA_HOME/jre/sh/java
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    else
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        JAVACMD=$JAVA_HOME/bin/java
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    fi
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    if [ ! -x "$JAVACMD" ] ; then
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        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
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Please set the JAVA_HOME variable in your environment to match the
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location of your Java installation."
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    fi
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else
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    JAVACMD=java
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    if ! command -v java >/dev/null 2>&1
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    then
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        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
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Please set the JAVA_HOME variable in your environment to match the
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location of your Java installation."
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    fi
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fi
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# Increase the maximum file descriptors if we can.
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if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
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    case $MAX_FD in #(
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      max*)
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        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
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        # shellcheck disable=SC2039,SC3045
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        MAX_FD=$( ulimit -H -n ) ||
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            warn "Could not query maximum file descriptor limit"
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    esac
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    case $MAX_FD in  #(
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      '' | soft) :;; #(
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      *)
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        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
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        # shellcheck disable=SC2039,SC3045
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        ulimit -n "$MAX_FD" ||
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            warn "Could not set maximum file descriptor limit to $MAX_FD"
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    esac
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fi
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# Collect all arguments for the java command, stacking in reverse order:
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#   * args from the command line
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#   * the main class name
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#   * -classpath
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#   * -D...appname settings
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#   * --module-path (only if needed)
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#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
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# For Cygwin or MSYS, switch paths to Windows format before running java
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if "$cygwin" || "$msys" ; then
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    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
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    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
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    JAVACMD=$( cygpath --unix "$JAVACMD" )
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    # Now convert the arguments - kludge to limit ourselves to /bin/sh
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    for arg do
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        if
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            case $arg in                                #(
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              -*)   false ;;                            # don't mess with options #(
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              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
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                    [ -e "$t" ] ;;                      #(
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              *)    false ;;
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            esac
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        then
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            arg=$( cygpath --path --ignore --mixed "$arg" )
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        fi
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        # Roll the args list around exactly as many times as the number of
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        # args, so each arg winds up back in the position where it started, but
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        # possibly modified.
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        #
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        # NB: a `for` loop captures its iteration list before it begins, so
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        # changing the positional parameters here affects neither the number of
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        # iterations, nor the values presented in `arg`.
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        shift                   # remove old arg
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        set -- "$@" "$arg"      # push replacement arg
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    done
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fi
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# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
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DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
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# Collect all arguments for the java command:
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#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
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#     and any embedded shellness will be escaped.
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#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
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#     treated as '${Hostname}' itself on the command line.
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set -- \
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        "-Dorg.gradle.appname=$APP_BASE_NAME" \
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        -classpath "$CLASSPATH" \
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        org.gradle.wrapper.GradleWrapperMain \
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        "$@"
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# Stop when "xargs" is not available.
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if ! command -v xargs >/dev/null 2>&1
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then
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    die "xargs is not available"
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fi
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# Use "xargs" to parse quoted args.
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#
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# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
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#
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# In Bash we could simply go:
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#
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#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
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#   set -- "${ARGS[@]}" "$@"
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#
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# but POSIX shell has neither arrays nor command substitution, so instead we
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# post-process each arg (as a line of input to sed) to backslash-escape any
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# character that might be a shell metacharacter, then use eval to reverse
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# that process (while maintaining the separation between arguments), and wrap
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# the whole thing up as a single "set" statement.
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#
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# This will of course break if any of these variables contains a newline or
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# an unmatched quote.
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#
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eval "set -- $(
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        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
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        xargs -n1 |
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        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
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        tr '\n' ' '
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    )" '"$@"'
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exec "$JAVACMD" "$@"
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