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# 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
 70app_path=$0
 71
 72# Need this for daisy-chained symlinks.
 73while
 74    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
 75    [ -h "$app_path" ]
 76do
 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
 83done
 84
 85# This is normally unused
 86# shellcheck disable=SC2034
 87APP_BASE_NAME=${0##*/}
 88# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
 89APP_HOME=$( 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.
 92MAX_FD=maximum
 93
 94warn () {
 95    echo "$*"
 96} >&2
 97
 98die () {
 99    echo
100    echo "$*"
101    echo
102    exit 1
103} >&2
104
105# OS specific support (must be 'true' or 'false').
106cygwin=false
107msys=false
108darwin=false
109nonstop=false
110case "$( uname )" in                #(
111  CYGWIN* )         cygwin=true  ;; #(
112  Darwin* )         darwin=true  ;; #(
113  MSYS* | MINGW* )  msys=true    ;; #(
114  NONSTOP* )        nonstop=true ;;
115esac
116
117CLASSPATH="\\\"\\\""
118
119
120# Determine the Java command to use to start the JVM.
121if [ -n "$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: $JAVA_HOME
130
131Please set the JAVA_HOME variable in your environment to match the
132location of your Java installation."
133    fi
134else
135    JAVACMD=java
136    if ! command -v java >/dev/null 2>&1
137    then
138        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
139
140Please set the JAVA_HOME variable in your environment to match the
141location of your Java installation."
142    fi
143fi
144
145# Increase the maximum file descriptors if we can.
146if ! "$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 $MAX_FD"
161    esac
162fi
163
164# Collect all arguments for the java command, stacking in reverse order:
165#   * args from the command line
166#   * the main class name
167#   * -classpath
168#   * -D...appname settings
169#   * --module-path (only if needed)
170#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
171
172# For Cygwin or MSYS, switch paths to Windows format before running java
173if "$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
201fi
202
203
204# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
205DEFAULT_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
213set -- \
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.
220if ! command -v xargs >/dev/null 2>&1
221then
222    die "xargs is not available"
223fi
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
244eval "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
251exec "$JAVACMD" "$@"