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/HEAD/platforms/jvm/plugins-application/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  # This is normally unused
 84  # shellcheck disable=SC2034
 85  APP_BASE_NAME=${0##*/}
 86  # Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
 87  APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
 88  
 89  # Use the maximum available, or set MAX_FD != -1 to use that value.
 90  MAX_FD=maximum
 91  
 92  warn () {
 93      echo "$*"
 94  } >&2
 95  
 96  die () {
 97      echo
 98      echo "$*"
 99      echo
100      exit 1
101  } >&2
102  
103  # OS specific support (must be 'true' or 'false').
104  cygwin=false
105  msys=false
106  darwin=false
107  nonstop=false
108  case "$( uname )" in                #(
109    CYGWIN* )         cygwin=true  ;; #(
110    Darwin* )         darwin=true  ;; #(
111    MSYS* | MINGW* )  msys=true    ;; #(
112    NONSTOP* )        nonstop=true ;;
113  esac
114  
115  CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
116  
117  
118  # Determine the Java command to use to start the JVM.
119  if [ -n "$JAVA_HOME" ] ; then
120      if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
121          # IBM's JDK on AIX uses strange locations for the executables
122          JAVACMD=$JAVA_HOME/jre/sh/java
123      else
124          JAVACMD=$JAVA_HOME/bin/java
125      fi
126      if [ ! -x "$JAVACMD" ] ; then
127          die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
128  
129  Please set the JAVA_HOME variable in your environment to match the
130  location of your Java installation."
131      fi
132  else
133      JAVACMD=java
134      if ! command -v java >/dev/null 2>&1
135      then
136          die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
137  
138  Please set the JAVA_HOME variable in your environment to match the
139  location of your Java installation."
140      fi
141  fi
142  
143  # Increase the maximum file descriptors if we can.
144  if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
145      case $MAX_FD in #(
146        max*)
147          # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
148          # shellcheck disable=SC2039,SC3045
149          MAX_FD=$( ulimit -H -n ) ||
150              warn "Could not query maximum file descriptor limit"
151      esac
152      case $MAX_FD in  #(
153        '' | soft) :;; #(
154        *)
155          # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
156          # shellcheck disable=SC2039,SC3045
157          ulimit -n "$MAX_FD" ||
158              warn "Could not set maximum file descriptor limit to $MAX_FD"
159      esac
160  fi
161  
162  # Collect all arguments for the java command, stacking in reverse order:
163  #   * args from the command line
164  #   * the main class name
165  #   * -classpath
166  #   * -D...appname settings
167  #   * --module-path (only if needed)
168  #   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
169  
170  # For Cygwin or MSYS, switch paths to Windows format before running java
171  if "$cygwin" || "$msys" ; then
172      APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
173      CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
174  
175      JAVACMD=$( cygpath --unix "$JAVACMD" )
176  
177      # Now convert the arguments - kludge to limit ourselves to /bin/sh
178      for arg do
179          if
180              case $arg in                                #(
181                -*)   false ;;                            # don't mess with options #(
182                /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
183                      [ -e "$t" ] ;;                      #(
184                *)    false ;;
185              esac
186          then
187              arg=$( cygpath --path --ignore --mixed "$arg" )
188          fi
189          # Roll the args list around exactly as many times as the number of
190          # args, so each arg winds up back in the position where it started, but
191          # possibly modified.
192          #
193          # NB: a `for` loop captures its iteration list before it begins, so
194          # changing the positional parameters here affects neither the number of
195          # iterations, nor the values presented in `arg`.
196          shift                   # remove old arg
197          set -- "$@" "$arg"      # push replacement arg
198      done
199  fi
200  
201  
202  # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
203  DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
204  
205  # Collect all arguments for the java command:
206  #   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
207  #     and any embedded shellness will be escaped.
208  #   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
209  #     treated as '${Hostname}' itself on the command line.
210  
211  set -- \
212          "-Dorg.gradle.appname=$APP_BASE_NAME" \
213          -classpath "$CLASSPATH" \
214          org.gradle.wrapper.GradleWrapperMain \
215          "$@"
216  
217  # Stop when "xargs" is not available.
218  if ! command -v xargs >/dev/null 2>&1
219  then
220      die "xargs is not available"
221  fi
222  
223  # Use "xargs" to parse quoted args.
224  #
225  # With -n1 it outputs one arg per line, with the quotes and backslashes removed.
226  #
227  # In Bash we could simply go:
228  #
229  #   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
230  #   set -- "${ARGS[@]}" "$@"
231  #
232  # but POSIX shell has neither arrays nor command substitution, so instead we
233  # post-process each arg (as a line of input to sed) to backslash-escape any
234  # character that might be a shell metacharacter, then use eval to reverse
235  # that process (while maintaining the separation between arguments), and wrap
236  # the whole thing up as a single "set" statement.
237  #
238  # This will of course break if any of these variables contains a newline or
239  # an unmatched quote.
240  #
241  
242  eval "set -- $(
243          printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
244          xargs -n1 |
245          sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
246          tr '\n' ' '
247      )" '"$@"'
248  
249  exec "$JAVACMD" "$@"