A gradle plugin that lets you define Exec and JavaExec tasks that run in the background
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README.md

gradle-execfork-plugin

Gradle plugin for running background processes during a build. Both standard executables and java classes are supported.

Usage

For running a standard executable:

plugins {
  id 'com.github.psxpaul.execfork' version '0.1.8'
}

task startDaemon(type: com.github.psxpaul.task.ExecFork) {
    commandLine = './MainScript.sh'
    args = [ '-d', '/foo/bar/data', '-v', '-l', '3' ]
    workingDir = "$projectDir/src/main/bash"
    standardOutput = "$buildDir/daemon.log"
    errorOutput = "$buildDir/daemon-error.log"
    stopAfter = verify
    waitForPort = 8080
    waitForOutput = 'has started'
    environment = ['JAVA_HOME': "$buildDir/java", 'USER_HOME': "$buildDir/userhome"]
}

For running a java main class:

plugins {
  id 'com.github.psxpaul.execfork' version '0.1.8'
}

task startDaemon(type: com.github.psxpaul.task.JavaExecFork) {
    classpath = sourceSets.main.runtimeClasspath
    main = 'com.sample.application.MainApp'
    args = [ '-d', '/foo/bar/data', '-v', '-l', '3' ]
    jvmArgs = [ '-Xmx500m', '-Djava.awt.headless=true' ]
    workingDir = "$buildDir/server"
    standardOutput = "$buildDir/daemon.log"
    errorOutput = "$buildDir/daemon-error.log"
    stopAfter = verify
    waitForPort = 8443
    waitForOutput = 'has started'
    environment 'JAVA_HOME', "$buildDir/java"
}

Supported Properties

ExecFork:

Name Type Description
workingDir String Optional. The path of the working directory to run the executable from. This is treated as a relative path, so specifying an absolute path should be preferred. Default: project.projectDir.absolutePath
args List Optional. A list of arguments to give to the executable.
standardOutput String Optional. The path of the file to write standard output to. If none is specified, process output is written to gradle's console output.
errorOutput String Optional. The path of the file to write error output to. If none is specified, the error output is directed to the same destination as the standard output.
waitForPort Int Optional. A port number to watch for to be open. Until opened, the task will block. If none is specified, the task will return immediately after launching the process.
waitForOutput String Optional. A string to look for in standardOutput. The task will block until this pattern appeared or the timeout is reached. If not specified, the task will return immediately after launching the process.
timeout Long Optional. The maximum number of seconds associated with the waitForPort or waitForOutput task. Default: 60
stopAfter org.gradle.api.Task Optional. A task that, when finished, will cause the process to stop. If none is specified, the process will stop at the very end of a build (whether successful or not).
commandLine String Required. The path to the executable.
environment Two Strings OR one Map<String, String> Optional. Environment variables to launch the executable with. You can either assign a Map with the '=' operator, or pass 2 Strings as key/value to the function. Note that multiple calls to this function are supported.

JavaExecFork:

Name Type Description
workingDir String Optional. The path of the working directory to run the executable from. This is treated as a relative path, so specifying an absolute path should be preferred. Default: project.projectDir.absolutePath
args List Optional. A list of arguments to give to the executable.
standardOutput String Optional. The path of the file to write standard output to. If none is specified, process output is written to gradle's console output.
errorOutput String Optional. The path of the file to write error output to. If none is specified, the error output is directed to the same destination as the standard output.
waitForPort Int Optional. A port number to watch for to be open. Until opened, the task will block. If none is specified, the task will return immediately after launching the process.
waitForOutput String Optional. A string to look for in standardOutput. The task will block until this pattern appeared or the timeout is reached. If not specified, the task will return immediately after launching the process.
timeout Long Optional. The maximum number of seconds associated with the waitForPort or waitForOutput task. Default: 60
stopAfter org.gradle.api.Task Optional. A task that, when finished, will cause the process to stop. If none is specified, the process will stop at the very end of a build (whether successful or not).
classpath org.gradle.api.file.FileCollection Required. The classpath to use to launch the java main class.
main String Required. The qualified name of the main java class to execute.
jvmArgs List Optional. The list of arguments to give to the jvm when launching the java main class.
environment Two Strings OR one Map<String, String> Optional. Environment variables to launch the java main class with. You can either assign a Map with the '=' operator, or pass 2 Strings as key/value to the function. Note that multiple calls to this function are supported.