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