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    1 #!/bin/sh
    2 
    3 #
    4 # Copyright © 2015-2021 the original authors.
    5 #
    6 # Licensed under the Apache License, Version 2.0 (the "License");
    7 # you may not use this file except in compliance with the License.
    8 # You may obtain a copy of the License at
    9 #
   10 #      https://www.apache.org/licenses/LICENSE-2.0
   11 #
   12 # Unless required by applicable law or agreed to in writing, software
   13 # distributed under the License is distributed on an "AS IS" BASIS,
   14 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   15 # See the License for the specific language governing permissions and
   16 # limitations under the License.
   17 #
   18 
   19 ##############################################################################
   20 #
   21 #   Gradle start up script for POSIX generated by Gradle.
   22 #
   23 #   Important for running:
   24 #
   25 #   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
   26 #       noncompliant, but you have some other compliant shell such as ksh or
   27 #       bash, then to run this script, type that shell name before the whole
   28 #       command line, like:
   29 #
   30 #           ksh Gradle
   31 #
   32 #       Busybox and similar reduced shells will NOT work, because this script
   33 #       requires all of these POSIX shell features:
   34 #         * functions;
   35 #         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
   36 #           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
   37 #         * compound commands having a testable exit status, especially «case»;
   38 #         * various built-in commands including «command», «set», and «ulimit».
   39 #
   40 #   Important for patching:
   41 #
   42 #   (2) This script targets any POSIX shell, so it avoids extensions provided
   43 #       by Bash, Ksh, etc; in particular arrays are avoided.
   44 #
   45 #       The "traditional" practice of packing multiple parameters into a
   46 #       space-separated string is a well documented source of bugs and security
   47 #       problems, so this is (mostly) avoided, by progressively accumulating
   48 #       options in "$@", and eventually passing that to Java.
   49 #
   50 #       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
   51 #       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
   52 #       see the in-line comments for details.
   53 #
   54 #       There are tweaks for specific operating systems such as AIX, CygWin,
   55 #       Darwin, MinGW, and NonStop.
   56 #
   57 #   (3) This script is generated from the Groovy template
   58 #       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
   59 #       within the Gradle project.
   60 #
   61 #       You can find Gradle at https://github.com/gradle/gradle/.
   62 #
   63 ##############################################################################
   64 
   65 # Attempt to set APP_HOME
   66 
   67 # Resolve links: $0 may be a link
   68 app_path=$0
   69 
   70 # Need this for daisy-chained symlinks.
   71 while
   72     APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
   73     [ -h "$app_path" ]
   74 do
   75     ls=$( ls -ld "$app_path" )
   76     link=${ls#*' -> '}
   77     case $link in             #(
   78       /*)   app_path=$link ;; #(
   79       *)    app_path=$APP_HOME$link ;;
   80     esac
   81 done
   82 
   83 APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
   84 
   85 APP_NAME="Gradle"
   86 APP_BASE_NAME=${0##*/}
   87 
   88 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
   89 DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
   90 
   91 # Use the maximum available, or set MAX_FD != -1 to use that value.
   92 MAX_FD=maximum
   93 
   94 warn () {
   95     echo "$*"
   96 } >&2
   97 
   98 die () {
   99     echo
  100     echo "$*"
  101     echo
  102     exit 1
  103 } >&2
  104 
  105 # OS specific support (must be 'true' or 'false').
  106 cygwin=false
  107 msys=false
  108 darwin=false
  109 nonstop=false
  110 case "$( uname )" in                #(
  111   CYGWIN* )         cygwin=true  ;; #(
  112   Darwin* )         darwin=true  ;; #(
  113   MSYS* | MINGW* )  msys=true    ;; #(
  114   NONSTOP* )        nonstop=true ;;
  115 esac
  116 
  117 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
  118 
  119 
  120 # Determine the Java command to use to start the JVM.
  121 if [ -n "$JAVA_HOME" ] ; then
  122     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
  123         # IBM's JDK on AIX uses strange locations for the executables
  124         JAVACMD=$JAVA_HOME/jre/sh/java
  125     else
  126         JAVACMD=$JAVA_HOME/bin/java
  127     fi
  128     if [ ! -x "$JAVACMD" ] ; then
  129         die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
  130 
  131 Please set the JAVA_HOME variable in your environment to match the
  132 location of your Java installation."
  133     fi
  134 else
  135     JAVACMD=java
  136     which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
  137 
  138 Please set the JAVA_HOME variable in your environment to match the
  139 location of your Java installation."
  140 fi
  141 
  142 # Increase the maximum file descriptors if we can.
  143 if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
  144     case $MAX_FD in #(
  145       max*)
  146         MAX_FD=$( ulimit -H -n ) ||
  147             warn "Could not query maximum file descriptor limit"
  148     esac
  149     case $MAX_FD in  #(
  150       '' | soft) :;; #(
  151       *)
  152         ulimit -n "$MAX_FD" ||
  153             warn "Could not set maximum file descriptor limit to $MAX_FD"
  154     esac
  155 fi
  156 
  157 # Collect all arguments for the java command, stacking in reverse order:
  158 #   * args from the command line
  159 #   * the main class name
  160 #   * -classpath
  161 #   * -D...appname settings
  162 #   * --module-path (only if needed)
  163 #   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
  164 
  165 # For Cygwin or MSYS, switch paths to Windows format before running java
  166 if "$cygwin" || "$msys" ; then
  167     APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
  168     CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
  169 
  170     JAVACMD=$( cygpath --unix "$JAVACMD" )
  171 
  172     # Now convert the arguments - kludge to limit ourselves to /bin/sh
  173     for arg do
  174         if
  175             case $arg in                                #(
  176               -*)   false ;;                            # don't mess with options #(
  177               /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
  178                     [ -e "$t" ] ;;                      #(
  179               *)    false ;;
  180             esac
  181         then
  182             arg=$( cygpath --path --ignore --mixed "$arg" )
  183         fi
  184         # Roll the args list around exactly as many times as the number of
  185         # args, so each arg winds up back in the position where it started, but
  186         # possibly modified.
  187         #
  188         # NB: a `for` loop captures its iteration list before it begins, so
  189         # changing the positional parameters here affects neither the number of
  190         # iterations, nor the values presented in `arg`.
  191         shift                   # remove old arg
  192         set -- "$@" "$arg"      # push replacement arg
  193     done
  194 fi
  195 
  196 # Collect all arguments for the java command;
  197 #   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
  198 #     shell script including quotes and variable substitutions, so put them in
  199 #     double quotes to make sure that they get re-expanded; and
  200 #   * put everything else in single quotes, so that it's not re-expanded.
  201 
  202 set -- \
  203         "-Dorg.gradle.appname=$APP_BASE_NAME" \
  204         -classpath "$CLASSPATH" \
  205         org.gradle.wrapper.GradleWrapperMain \
  206         "$@"
  207 
  208 # Use "xargs" to parse quoted args.
  209 #
  210 # With -n1 it outputs one arg per line, with the quotes and backslashes removed.
  211 #
  212 # In Bash we could simply go:
  213 #
  214 #   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
  215 #   set -- "${ARGS[@]}" "$@"
  216 #
  217 # but POSIX shell has neither arrays nor command substitution, so instead we
  218 # post-process each arg (as a line of input to sed) to backslash-escape any
  219 # character that might be a shell metacharacter, then use eval to reverse
  220 # that process (while maintaining the separation between arguments), and wrap
  221 # the whole thing up as a single "set" statement.
  222 #
  223 # This will of course break if any of these variables contains a newline or
  224 # an unmatched quote.
  225 #
  226 
  227 eval "set -- $(
  228         printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
  229         xargs -n1 |
  230         sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
  231         tr '\n' ' '
  232     )" '"$@"'
  233 
  234 exec "$JAVACMD" "$@"