1  #!/bin/sh
  2  
  3  #
  4  # Copyright © 2015 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  # SPDX-License-Identifier: Apache-2.0
 19  #
 20  
 21  ##############################################################################
 22  #
 23  #   Gradle start up script for POSIX generated by Gradle.
 24  #
 25  #   Important for running:
 26  #
 27  #   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
 28  #       noncompliant, but you have some other compliant shell such as ksh or
 29  #       bash, then to run this script, type that shell name before the whole
 30  #       command line, like:
 31  #
 32  #           ksh Gradle
 33  #
 34  #       Busybox and similar reduced shells will NOT work, because this script
 35  #       requires all of these POSIX shell features:
 36  #         * functions;
 37  #         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
 38  #           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
 39  #         * compound commands having a testable exit status, especially «case»;
 40  #         * various built-in commands including «command», «set», and «ulimit».
 41  #
 42  #   Important for patching:
 43  #
 44  #   (2) This script targets any POSIX shell, so it avoids extensions provided
 45  #       by Bash, Ksh, etc; in particular arrays are avoided.
 46  #
 47  #       The "traditional" practice of packing multiple parameters into a
 48  #       space-separated string is a well documented source of bugs and security
 49  #       problems, so this is (mostly) avoided, by progressively accumulating
 50  #       options in "$@", and eventually passing that to Java.
 51  #
 52  #       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
 53  #       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
 54  #       see the in-line comments for details.
 55  #
 56  #       There are tweaks for specific operating systems such as AIX, CygWin,
 57  #       Darwin, MinGW, and NonStop.
 58  #
 59  #   (3) This script is generated from the Groovy template
 60  #       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
 61  #       within the Gradle project.
 62  #
 63  #       You can find Gradle at https://github.com/gradle/gradle/.
 64  #
 65  ##############################################################################
 66  
 67  # Attempt to set APP_HOME
 68  
 69  # Resolve links: $0 may be a link
 70  app_path=$0
 71  
 72  # Need this for daisy-chained symlinks.
 73  while
 74      APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
 75      [ -h "$app_path" ]
 76  do
 77      ls=$( ls -ld "$app_path" )
 78      link=${ls#*' -> '}
 79      case $link in             #(
 80        /*)   app_path=$link ;; #(
 81        *)    app_path=$APP_HOME$link ;;
 82      esac
 83  done
 84  
 85  # This is normally unused
 86  # shellcheck disable=SC2034
 87  APP_BASE_NAME=${0##*/}
 88  # Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
 89  APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
 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 "$( uname )" in                #(
111    CYGWIN* )         cygwin=true  ;; #(
112    Darwin* )         darwin=true  ;; #(
113    MSYS* | MINGW* )  msys=true    ;; #(
114    NONSTOP* )        nonstop=true ;;
115  esac
116  
117  CLASSPATH="\\\"\\\""
118  
119  
120  # Determine the Java command to use to start the JVM.
121  if [ -n "$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: $JAVA_HOME
130  
131  Please set the JAVA_HOME variable in your environment to match the
132  location of your Java installation."
133      fi
134  else
135      JAVACMD=java
136      if ! command -v java >/dev/null 2>&1
137      then
138          die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
139  
140  Please set the JAVA_HOME variable in your environment to match the
141  location of your Java installation."
142      fi
143  fi
144  
145  # Increase the maximum file descriptors if we can.
146  if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
147      case $MAX_FD in #(
148        max*)
149          # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
150          # shellcheck disable=SC2039,SC3045
151          MAX_FD=$( ulimit -H -n ) ||
152              warn "Could not query maximum file descriptor limit"
153      esac
154      case $MAX_FD in  #(
155        '' | soft) :;; #(
156        *)
157          # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
158          # shellcheck disable=SC2039,SC3045
159          ulimit -n "$MAX_FD" ||
160              warn "Could not set maximum file descriptor limit to $MAX_FD"
161      esac
162  fi
163  
164  # Collect all arguments for the java command, stacking in reverse order:
165  #   * args from the command line
166  #   * the main class name
167  #   * -classpath
168  #   * -D...appname settings
169  #   * --module-path (only if needed)
170  #   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
171  
172  # For Cygwin or MSYS, switch paths to Windows format before running java
173  if "$cygwin" || "$msys" ; then
174      APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
175      CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
176  
177      JAVACMD=$( cygpath --unix "$JAVACMD" )
178  
179      # Now convert the arguments - kludge to limit ourselves to /bin/sh
180      for arg do
181          if
182              case $arg in                                #(
183                -*)   false ;;                            # don't mess with options #(
184                /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
185                      [ -e "$t" ] ;;                      #(
186                *)    false ;;
187              esac
188          then
189              arg=$( cygpath --path --ignore --mixed "$arg" )
190          fi
191          # Roll the args list around exactly as many times as the number of
192          # args, so each arg winds up back in the position where it started, but
193          # possibly modified.
194          #
195          # NB: a `for` loop captures its iteration list before it begins, so
196          # changing the positional parameters here affects neither the number of
197          # iterations, nor the values presented in `arg`.
198          shift                   # remove old arg
199          set -- "$@" "$arg"      # push replacement arg
200      done
201  fi
202  
203  
204  # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
205  DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
206  
207  # Collect all arguments for the java command:
208  #   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
209  #     and any embedded shellness will be escaped.
210  #   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
211  #     treated as '${Hostname}' itself on the command line.
212  
213  set -- \
214          "-Dorg.gradle.appname=$APP_BASE_NAME" \
215          -classpath "$CLASSPATH" \
216          -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
217          "$@"
218  
219  # Stop when "xargs" is not available.
220  if ! command -v xargs >/dev/null 2>&1
221  then
222      die "xargs is not available"
223  fi
224  
225  # Use "xargs" to parse quoted args.
226  #
227  # With -n1 it outputs one arg per line, with the quotes and backslashes removed.
228  #
229  # In Bash we could simply go:
230  #
231  #   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
232  #   set -- "${ARGS[@]}" "$@"
233  #
234  # but POSIX shell has neither arrays nor command substitution, so instead we
235  # post-process each arg (as a line of input to sed) to backslash-escape any
236  # character that might be a shell metacharacter, then use eval to reverse
237  # that process (while maintaining the separation between arguments), and wrap
238  # the whole thing up as a single "set" statement.
239  #
240  # This will of course break if any of these variables contains a newline or
241  # an unmatched quote.
242  #
243  
244  eval "set -- $(
245          printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
246          xargs -n1 |
247          sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
248          tr '\n' ' '
249      )" '"$@"'
250  
251  exec "$JAVACMD" "$@"