├── gradle.properties ├── assets └── CompoSnake.gif ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── src └── main │ └── kotlin │ └── com │ └── arkivanov │ └── composnake │ ├── Direction.kt │ ├── Point.kt │ ├── Snake.kt │ ├── Utils.kt │ ├── Board.kt │ ├── Game.kt │ ├── DIrectionExt.kt │ ├── RandomPointGenerator.kt │ ├── DefaultGame.kt │ └── Main.kt ├── settings.gradle.kts ├── .gitignore ├── README.md ├── LICENSE ├── gradlew.bat └── gradlew /gradle.properties: -------------------------------------------------------------------------------- 1 | kotlin.code.style=official 2 | -------------------------------------------------------------------------------- /assets/CompoSnake.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/arkivanov/CompoSnake/HEAD/assets/CompoSnake.gif -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/arkivanov/CompoSnake/HEAD/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /src/main/kotlin/com/arkivanov/composnake/Direction.kt: -------------------------------------------------------------------------------- 1 | package com.arkivanov.composnake 2 | 3 | enum class Direction { 4 | LEFT, UP, RIGHT, DOWN 5 | } 6 | -------------------------------------------------------------------------------- /src/main/kotlin/com/arkivanov/composnake/Point.kt: -------------------------------------------------------------------------------- 1 | package com.arkivanov.composnake 2 | 3 | data class Point( 4 | val x: Int, 5 | val y: Int 6 | ) 7 | -------------------------------------------------------------------------------- /src/main/kotlin/com/arkivanov/composnake/Snake.kt: -------------------------------------------------------------------------------- 1 | package com.arkivanov.composnake 2 | 3 | data class Snake( 4 | val points: Set, 5 | val head: Point 6 | ) 7 | -------------------------------------------------------------------------------- /src/main/kotlin/com/arkivanov/composnake/Utils.kt: -------------------------------------------------------------------------------- 1 | package com.arkivanov.composnake 2 | 3 | inline fun List.forEachFast(block: (T) -> Unit) { 4 | for (i in indices) { 5 | block(get(i)) 6 | } 7 | } 8 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | distributionBase=GRADLE_USER_HOME 2 | distributionPath=wrapper/dists 3 | distributionUrl=https\://services.gradle.org/distributions/gradle-7.5.1-bin.zip 4 | zipStoreBase=GRADLE_USER_HOME 5 | zipStorePath=wrapper/dists 6 | -------------------------------------------------------------------------------- /src/main/kotlin/com/arkivanov/composnake/Board.kt: -------------------------------------------------------------------------------- 1 | package com.arkivanov.composnake 2 | 3 | data class Board( 4 | val snake: Snake?, 5 | val grid: List>, 6 | val cells: Set, 7 | val direction: Direction, 8 | val food: Point? 9 | ) 10 | -------------------------------------------------------------------------------- /settings.gradle.kts: -------------------------------------------------------------------------------- 1 | pluginManagement { 2 | repositories { 3 | gradlePluginPortal() 4 | mavenCentral() 5 | maven { url = uri("https://maven.pkg.jetbrains.space/public/p/compose/dev") } 6 | } 7 | 8 | } 9 | rootProject.name = "composnake" 10 | 11 | -------------------------------------------------------------------------------- /src/main/kotlin/com/arkivanov/composnake/Game.kt: -------------------------------------------------------------------------------- 1 | package com.arkivanov.composnake 2 | 3 | import androidx.compose.runtime.State 4 | 5 | interface Game { 6 | 7 | val board: State 8 | 9 | fun step() 10 | 11 | fun setDirection(direction: Direction) 12 | } 13 | 14 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | *.iml 2 | .gradle 3 | /local.properties 4 | /.idea 5 | .DS_Store 6 | /build 7 | /captures 8 | .externalNativeBuild 9 | .cxx 10 | local.properties 11 | .DS_Store 12 | /node_modules 13 | /npm-debug.log* 14 | __pycache__ 15 | venv 16 | /MANIFEST 17 | /manifest.json 18 | /site 19 | /dist 20 | /mkdocs_material.egg-info 21 | .vscode -------------------------------------------------------------------------------- /src/main/kotlin/com/arkivanov/composnake/DIrectionExt.kt: -------------------------------------------------------------------------------- 1 | package com.arkivanov.composnake 2 | 3 | fun Direction.invert(): Direction = 4 | when (this) { 5 | Direction.LEFT -> Direction.RIGHT 6 | Direction.UP -> Direction.DOWN 7 | Direction.RIGHT -> Direction.LEFT 8 | Direction.DOWN -> Direction.UP 9 | } 10 | -------------------------------------------------------------------------------- /src/main/kotlin/com/arkivanov/composnake/RandomPointGenerator.kt: -------------------------------------------------------------------------------- 1 | package com.arkivanov.composnake 2 | 3 | class RandomPointGenerator { 4 | 5 | private val available = HashSet() 6 | 7 | fun occupy(point: Point) { 8 | available -= point 9 | } 10 | 11 | fun free(point: Point) { 12 | available += point 13 | } 14 | 15 | fun generate(): Point = available.random() 16 | } 17 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # CompoSnake 2 | 3 | A simple Snake game implemented using [Compose for Desktop](https://github.com/JetBrains/compose-jb). 4 | 5 | Run: `./gradlew run` 6 | 7 | 8 | 9 | ## Author 10 | 11 | Twitter: [@arkann1985](https://twitter.com/arkann1985) 12 | 13 | If you like this project you can always Buy Me A Coffee ;-) 14 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2021 Arkadii Ivanov 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /gradlew.bat: -------------------------------------------------------------------------------- 1 | @rem 2 | @rem Copyright 2015 the original author or authors. 3 | @rem 4 | @rem Licensed under the Apache License, Version 2.0 (the "License"); 5 | @rem you may not use this file except in compliance with the License. 6 | @rem You may obtain a copy of the License at 7 | @rem 8 | @rem https://www.apache.org/licenses/LICENSE-2.0 9 | @rem 10 | @rem Unless required by applicable law or agreed to in writing, software 11 | @rem distributed under the License is distributed on an "AS IS" BASIS, 12 | @rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | @rem See the License for the specific language governing permissions and 14 | @rem limitations under the License. 15 | @rem 16 | 17 | @if "%DEBUG%"=="" @echo off 18 | @rem ########################################################################## 19 | @rem 20 | @rem Gradle startup script for Windows 21 | @rem 22 | @rem ########################################################################## 23 | 24 | @rem Set local scope for the variables with windows NT shell 25 | if "%OS%"=="Windows_NT" setlocal 26 | 27 | set DIRNAME=%~dp0 28 | if "%DIRNAME%"=="" set DIRNAME=. 29 | set APP_BASE_NAME=%~n0 30 | set APP_HOME=%DIRNAME% 31 | 32 | @rem Resolve any "." and ".." in APP_HOME to make it shorter. 33 | for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi 34 | 35 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 36 | set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" 37 | 38 | @rem Find java.exe 39 | if defined JAVA_HOME goto findJavaFromJavaHome 40 | 41 | set JAVA_EXE=java.exe 42 | %JAVA_EXE% -version >NUL 2>&1 43 | if %ERRORLEVEL% equ 0 goto execute 44 | 45 | echo. 46 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 47 | echo. 48 | echo Please set the JAVA_HOME variable in your environment to match the 49 | echo location of your Java installation. 50 | 51 | goto fail 52 | 53 | :findJavaFromJavaHome 54 | set JAVA_HOME=%JAVA_HOME:"=% 55 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe 56 | 57 | if exist "%JAVA_EXE%" goto execute 58 | 59 | echo. 60 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 61 | echo. 62 | echo Please set the JAVA_HOME variable in your environment to match the 63 | echo location of your Java installation. 64 | 65 | goto fail 66 | 67 | :execute 68 | @rem Setup the command line 69 | 70 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 71 | 72 | 73 | @rem Execute Gradle 74 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %* 75 | 76 | :end 77 | @rem End local scope for the variables with windows NT shell 78 | if %ERRORLEVEL% equ 0 goto mainEnd 79 | 80 | :fail 81 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 82 | rem the _cmd.exe /c_ return code! 83 | set EXIT_CODE=%ERRORLEVEL% 84 | if %EXIT_CODE% equ 0 set EXIT_CODE=1 85 | if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE% 86 | exit /b %EXIT_CODE% 87 | 88 | :mainEnd 89 | if "%OS%"=="Windows_NT" endlocal 90 | 91 | :omega 92 | -------------------------------------------------------------------------------- /src/main/kotlin/com/arkivanov/composnake/DefaultGame.kt: -------------------------------------------------------------------------------- 1 | package com.arkivanov.composnake 2 | 3 | import androidx.compose.runtime.MutableState 4 | import androidx.compose.runtime.State 5 | import androidx.compose.runtime.mutableStateOf 6 | 7 | class DefaultGame : Game { 8 | private val _board: MutableState 9 | private val randomPointGenerator: RandomPointGenerator 10 | 11 | init { 12 | val width = 16 13 | val height = width 14 | val cy = height / 2 15 | 16 | val snake = 17 | setOf( 18 | Point(x = 0, y = cy), 19 | Point(x = 1, y = cy), 20 | Point(x = 2, y = cy), 21 | Point(x = 3, y = cy), 22 | Point(x = 4, y = cy) 23 | ) 24 | 25 | val grid = 26 | List(height) { y -> 27 | List(width) { x -> 28 | Point(x = x, y = y) 29 | } 30 | } 31 | 32 | randomPointGenerator = RandomPointGenerator() 33 | 34 | grid.forEach { row -> 35 | row.forEach(randomPointGenerator::free) 36 | } 37 | 38 | snake.forEach(randomPointGenerator::occupy) 39 | 40 | _board = 41 | mutableStateOf( 42 | Board( 43 | snake = Snake(points = snake, head = snake.last()), 44 | grid = grid, 45 | cells = grid.flatten().toSet(), 46 | direction = Direction.RIGHT, 47 | food = randomPointGenerator.generate() 48 | ) 49 | ) 50 | } 51 | 52 | override val board: State = _board 53 | 54 | override fun step() { 55 | update { 56 | val newSnake = snake?.step(direction = direction, food = food, cells = cells) 57 | snake?.points?.forEach(randomPointGenerator::free) 58 | newSnake?.points?.forEach(randomPointGenerator::occupy) 59 | 60 | copy( 61 | snake = newSnake, 62 | food = when { 63 | newSnake == null -> null 64 | newSnake.head == food -> randomPointGenerator.generate() 65 | else -> food 66 | } 67 | ) 68 | } 69 | } 70 | 71 | // TODO: Consider persistent collections 72 | private fun Snake.step(direction: Direction, food: Point?, cells: Set): Snake? { 73 | val newPoints = LinkedHashSet(points) 74 | val newHead = points.last().step(direction) 75 | 76 | if ((newHead in newPoints) || (newHead !in cells)) { 77 | return null 78 | } 79 | 80 | newPoints += newHead 81 | 82 | if (newHead != food) { 83 | newPoints -= points.first() 84 | } 85 | 86 | return copy(points = newPoints, head = newHead) 87 | } 88 | 89 | private fun Point.step(direction: Direction): Point = 90 | when (direction) { 91 | Direction.LEFT -> copy(x = x - 1) 92 | Direction.UP -> copy(y = y - 1) 93 | Direction.RIGHT -> copy(x = x + 1) 94 | Direction.DOWN -> copy(y = y + 1) 95 | } 96 | 97 | override fun setDirection(direction: Direction) { 98 | update { 99 | copy( 100 | direction = if (direction != this.direction.invert()) direction else this.direction 101 | ) 102 | } 103 | } 104 | 105 | private inline fun update(func: Board.() -> Board) { 106 | _board.value = _board.value.func() 107 | } 108 | } 109 | -------------------------------------------------------------------------------- /src/main/kotlin/com/arkivanov/composnake/Main.kt: -------------------------------------------------------------------------------- 1 | package com.arkivanov.composnake 2 | 3 | import androidx.compose.foundation.layout.Box 4 | import androidx.compose.foundation.layout.Column 5 | import androidx.compose.foundation.layout.Row 6 | import androidx.compose.foundation.layout.fillMaxSize 7 | import androidx.compose.foundation.layout.size 8 | import androidx.compose.material.Checkbox 9 | import androidx.compose.material.CheckboxDefaults 10 | import androidx.compose.material.MaterialTheme 11 | import androidx.compose.material.RadioButton 12 | import androidx.compose.material.RadioButtonDefaults 13 | import androidx.compose.material.Text 14 | import androidx.compose.runtime.Composable 15 | import androidx.compose.runtime.LaunchedEffect 16 | import androidx.compose.ui.Alignment 17 | import androidx.compose.ui.ExperimentalComposeUiApi 18 | import androidx.compose.ui.Modifier 19 | import androidx.compose.ui.focus.FocusRequester 20 | import androidx.compose.ui.focus.focusRequester 21 | import androidx.compose.ui.focus.focusTarget 22 | import androidx.compose.ui.input.key.Key 23 | import androidx.compose.ui.input.key.key 24 | import androidx.compose.ui.input.key.onKeyEvent 25 | import androidx.compose.ui.unit.DpSize 26 | import androidx.compose.ui.unit.dp 27 | import androidx.compose.ui.window.Window 28 | import androidx.compose.ui.window.WindowState 29 | import androidx.compose.ui.window.application 30 | import kotlinx.coroutines.delay 31 | import kotlinx.coroutines.isActive 32 | 33 | // These make the cells an attractive size. 34 | private val CELL_SIZE = 24.dp 35 | 36 | @OptIn(ExperimentalComposeUiApi::class) 37 | fun main() = application { 38 | val game: Game = DefaultGame() 39 | val focusRequester = FocusRequester() 40 | 41 | Window( 42 | state = WindowState(size = DpSize(500.dp, 500.dp)), 43 | onCloseRequest = ::exitApplication, 44 | title = "CompoSnake" 45 | ) { 46 | MaterialTheme { 47 | LaunchedEffect(Unit) { 48 | focusRequester.requestFocus() 49 | while (isActive) { 50 | delay(400L) 51 | game.step() 52 | } 53 | } 54 | 55 | Box( 56 | modifier = Modifier 57 | .focusRequester(focusRequester) 58 | .focusTarget() 59 | .onKeyEvent { 60 | when (it.key) { 61 | Key.DirectionLeft -> game.setDirection(Direction.LEFT).let { true } 62 | Key.DirectionUp -> game.setDirection(Direction.UP).let { true } 63 | Key.DirectionRight -> game.setDirection(Direction.RIGHT).let { true } 64 | Key.DirectionDown -> game.setDirection(Direction.DOWN).let { true } 65 | else -> false 66 | } 67 | } 68 | ) 69 | 70 | Box( 71 | contentAlignment = Alignment.Center 72 | ) { 73 | Board(game.board.value) 74 | } 75 | } 76 | } 77 | } 78 | 79 | @Composable 80 | private fun Board(board: Board) { 81 | if (board.snake == null) { 82 | Text( 83 | text = "Game over!", 84 | style = MaterialTheme.typography.h3 85 | ) 86 | return 87 | } 88 | 89 | Box( 90 | modifier = Modifier.fillMaxSize(), 91 | contentAlignment = Alignment.Center, 92 | ) { 93 | Column { 94 | board.grid.forEachFast { row -> 95 | Row { 96 | row.forEachFast { cell -> 97 | when (cell) { 98 | board.food -> FoodCell() 99 | in board.snake.points -> SnakeCell(isHead = cell == board.snake.head) 100 | else -> EmptyCell() 101 | } 102 | } 103 | } 104 | } 105 | } 106 | } 107 | } 108 | 109 | @Composable 110 | private fun FoodCell() { 111 | RadioButton( 112 | modifier = Modifier.size(CELL_SIZE), 113 | selected = true, 114 | onClick = {}, 115 | colors = RadioButtonDefaults.colors(selectedColor = MaterialTheme.colors.primary) 116 | ) 117 | } 118 | 119 | @Composable 120 | private fun EmptyCell() { 121 | Checkbox( 122 | modifier = Modifier.size(CELL_SIZE), 123 | checked = false, 124 | onCheckedChange = {} 125 | ) 126 | } 127 | 128 | @Composable 129 | private fun SnakeCell(isHead: Boolean) { 130 | Checkbox( 131 | checked = true, 132 | modifier = Modifier.size(CELL_SIZE), 133 | colors = CheckboxDefaults.colors( 134 | checkedColor = if (isHead) MaterialTheme.colors.primary else MaterialTheme.colors.secondary 135 | ), 136 | onCheckedChange = {} 137 | ) 138 | } 139 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 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/master/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 | APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit 84 | 85 | APP_NAME="Gradle" 86 | APP_BASE_NAME=${0##*/} 87 | 88 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 89 | DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' 90 | 91 | # Use the maximum available, or set MAX_FD != -1 to use that value. 92 | MAX_FD=maximum 93 | 94 | warn () { 95 | echo "$*" 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=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 118 | 119 | 120 | # Determine the Java command to use to start the JVM. 121 | if [ -n "$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: $JAVA_HOME 130 | 131 | Please set the JAVA_HOME variable in your environment to match the 132 | location of your Java installation." 133 | fi 134 | else 135 | JAVACMD=java 136 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 137 | 138 | Please set the JAVA_HOME variable in your environment to match the 139 | location of your Java installation." 140 | fi 141 | 142 | # Increase the maximum file descriptors if we can. 143 | if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then 144 | case $MAX_FD in #( 145 | max*) 146 | MAX_FD=$( ulimit -H -n ) || 147 | warn "Could not query maximum file descriptor limit" 148 | esac 149 | case $MAX_FD in #( 150 | '' | soft) :;; #( 151 | *) 152 | ulimit -n "$MAX_FD" || 153 | warn "Could not set maximum file descriptor limit to $MAX_FD" 154 | esac 155 | fi 156 | 157 | # Collect all arguments for the java command, stacking in reverse order: 158 | # * args from the command line 159 | # * the main class name 160 | # * -classpath 161 | # * -D...appname settings 162 | # * --module-path (only if needed) 163 | # * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables. 164 | 165 | # For Cygwin or MSYS, switch paths to Windows format before running java 166 | if "$cygwin" || "$msys" ; then 167 | APP_HOME=$( cygpath --path --mixed "$APP_HOME" ) 168 | CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" ) 169 | 170 | JAVACMD=$( cygpath --unix "$JAVACMD" ) 171 | 172 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 173 | for arg do 174 | if 175 | case $arg in #( 176 | -*) false ;; # don't mess with options #( 177 | /?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath 178 | [ -e "$t" ] ;; #( 179 | *) false ;; 180 | esac 181 | then 182 | arg=$( cygpath --path --ignore --mixed "$arg" ) 183 | fi 184 | # Roll the args list around exactly as many times as the number of 185 | # args, so each arg winds up back in the position where it started, but 186 | # possibly modified. 187 | # 188 | # NB: a `for` loop captures its iteration list before it begins, so 189 | # changing the positional parameters here affects neither the number of 190 | # iterations, nor the values presented in `arg`. 191 | shift # remove old arg 192 | set -- "$@" "$arg" # push replacement arg 193 | done 194 | fi 195 | 196 | # Collect all arguments for the java command; 197 | # * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of 198 | # shell script including quotes and variable substitutions, so put them in 199 | # double quotes to make sure that they get re-expanded; and 200 | # * put everything else in single quotes, so that it's not re-expanded. 201 | 202 | set -- \ 203 | "-Dorg.gradle.appname=$APP_BASE_NAME" \ 204 | -classpath "$CLASSPATH" \ 205 | org.gradle.wrapper.GradleWrapperMain \ 206 | "$@" 207 | 208 | # Stop when "xargs" is not available. 209 | if ! command -v xargs >/dev/null 2>&1 210 | then 211 | die "xargs is not available" 212 | fi 213 | 214 | # Use "xargs" to parse quoted args. 215 | # 216 | # With -n1 it outputs one arg per line, with the quotes and backslashes removed. 217 | # 218 | # In Bash we could simply go: 219 | # 220 | # readarray ARGS < <( xargs -n1 <<<"$var" ) && 221 | # set -- "${ARGS[@]}" "$@" 222 | # 223 | # but POSIX shell has neither arrays nor command substitution, so instead we 224 | # post-process each arg (as a line of input to sed) to backslash-escape any 225 | # character that might be a shell metacharacter, then use eval to reverse 226 | # that process (while maintaining the separation between arguments), and wrap 227 | # the whole thing up as a single "set" statement. 228 | # 229 | # This will of course break if any of these variables contains a newline or 230 | # an unmatched quote. 231 | # 232 | 233 | eval "set -- $( 234 | printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" | 235 | xargs -n1 | 236 | sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' | 237 | tr '\n' ' ' 238 | )" '"$@"' 239 | 240 | exec "$JAVACMD" "$@" 241 | --------------------------------------------------------------------------------