[GRADLE-3528] Exec tasks never up-to-date due to changing environment variables Created: 18/Aug/16  Updated: 25/Aug/16  Resolved: 25/Aug/16

Status: Resolved
Project: Gradle
Affects Version/s: 3.0
Fix Version/s: 3.1-rc-1

Type: Bug
Reporter: Sterling Greene Assignee: Stefan Wolf
Resolution: Fixed Votes: 0

Known Issue Of:



On macOS (at least), three environment variables (APP_NAME, APP_ICON, JAVA_MAIN_CLASS) are inherited by all Exec tasks that change names on every build. These aren't actually passed to the process, something between the up-to-date checks and actually starting the process strips these environment variables out.


apply plugin: 'base'

task createScript << {
    def script = file("script.sh")
    script.executable = true
    script.text = '''#!/bin/sh 
echo "$*"

    file("package.json").text = "{}"

task run(type: Exec) {
    dependsOn createScript
    commandLine './script.sh', 'install'
    inputs.files 'package.json'
    outputs.dir 'node_modules'

Workaround (add this to the Exec task):

    def iter = environment.iterator()
    while(iter.hasNext()) {
        def entry = iter.next()
        if (entry.key =~ /APP_NAME_\d+|APP_ICON_\d+|JAVA_MAIN_CLASS_\d+/) {

Comment by Lóránt Pintér [ 19/Aug/16 ]

The problem is caused by this line: https://github.com/gradle/gradle/blob/dad0adec96ff641ef904d90c300d5bd6156b95f4/subprojects/core/src/main/java/org/gradle/api/tasks/AbstractExecTask.java#L177-L177

It used to have no annotation prior to 3.0, and is now annotated as @Optional @Input. Instead it should be annotated as @Internal to preserve the original behavior, and ignore the environment for up-to-date checks for now.

Comment by Lóránt Pintér [ 19/Aug/16 ]

The @Optional @Input annotation needs to be replaced with @Internal here as well: https://github.com/gradle/gradle/blob/0595e592a454dc7468212ece39ba25fbd334bdf4/subprojects/core/src/main/java/org/gradle/api/tasks/JavaExec.java#L372-L372

Comment by Lóránt Pintér [ 19/Aug/16 ]

The tasks affected by this problem are: Exec, JavaExec and the native RunTestExecutable. The Java Test task is not affected.

Comment by Stefan Wolf [ 25/Aug/16 ]

Fixed by replacing @Input by @Internal on environment properties.

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