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
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 "$JAVACMD" "$@"