英文:
Gradle multi-module project compilation fails with "classNotFoundExceptions" from dependencies mentioned in sub-modules
问题
我有一个Java项目的多模块设置，结构如下。
mainApp
|--> core-module
| |--> src
| |--> build.gradle
|--> implementation group: 'org.apache.axis2', name: 'axis2-kernel', version: '1.7.8'
|--> implementation group: 'org.apache.httpcomponents', name: 'httpcore', version: '4.4.13'
|--> implementation files('libs/some_local.jar')
|--> compile project(":lib-module")
|--> compile project(":lib-another-module")
|--> ...
|
|--> lib-module
| |--> src
| |--> build.gradle
|--> implementation group: 'commons-lang', name: 'commons-lang', version: '2.6'
|--> implementation files('libs/another_local.jar')
|--> ...
|--> lib-another-module
| |--> src
| |--> build.gradle
|--> implementation group: 'com.google.code.gson', name: 'gson', version: '2.8.5'
|--> implementation files('libs/another_local.jar')
|--> ...
|
|--> settings.gradle
|--> build.gradle
|--> gradle.properties
在 mainApp/build.gradle 文件中，我有一个名为 mentioned 的子模块，如下所示：
sourceSets {
main {
java {
srcDirs project('core-module').file("src")
srcDirs project('lib-module').file("src")
srcDirs project('lib-another-module').file("src")
}
}
}
如果我单独构建子模块，则可以成功编译，但当我在根目录运行 ./gradlew compileJava 时，它会因为在子模块中已经提到过的 JAR 包引发 classNotFoundExceptions 错误。
> Task :core-module:compileJava
//编译成功
> Task :lib-module:compileJava
//编译成功
> Task :lib-another-module:compileJava
//编译成功
> Task :compileJava
/.../core-module/src/java/../OAuthUtils.java:12: error: package org.apache.http does not exist
import org.apache.http.Header;
...
//失败!
在这里，./gradlew core-module:compileJava 是完美工作的，但从根目录调用编译时会失败。
- 我该如何处理这个问题？
- 是否因为从文件系统引用了一些本地的 JAR 包？
编辑
我发现指向子 sub-module 的根 sourceSets{} 的编译失败，而单独的 sub-module 编译是成功的。
但是，我需要这个 sourceSets{} 来创建包含所有 sub-module 的一个单体 JAR 包。
注意： 我这里不是在创建 fatJar 或 shadedJar，但我需要在不包含依赖 JAR 包的情况下包括所有 sub-module 的所有包。
英文:
I have a multi-module setup for a Java project with following structure.
mainApp
|--> core-module
| |--> src
| |--> build.gradle
|--> implementation group: 'org.apache.axis2', name: 'axis2-kernel', version: '1.7.8'
|--> implementation group: 'org.apache.httpcomponents', name: 'httpcore', version: '4.4.13'
|--> implementation files('libs/some_local.jar')
|--> compile project(":lib-module")
|--> compile project(":lib-another-module")
|--> ...
|
|--> lib-module
| |--> src
| |--> build.gradle
|--> implementation group: 'commons-lang', name: 'commons-lang', version: '2.6'
|--> implementation files('libs/another_local.jar')
|--> ...
|--> lib-another-module
| |--> src
| |--> build.gradle
|--> implementation group: 'com.google.code.gson', name: 'gson', version: '2.8.5'
|--> implementation files('libs/another_local.jar')
|--> ...
|
|--> settings.gradle
|--> build.gradle
|--> gradle.properties
In mainApp/build.gradle file I have a 'mentioned' sub-modules as
sourceSets {
main {
java {
srcDirs project('core-module').file("src")
srcDirs project('lib-module').file("src")
srcDirs project('lib-another-module').file("src")
}
}
}
If I build individual sub-module it get compiled successfully but when I run ./gradlew compileJava at root , it fails with classNotFoundExceptions from the jars which I've already mentioned in sub-modules
> Task :core-module:compileJava
//successful
> Task :lib-module:compileJava
//successful
> Task :lib-another-module:compileJava
//successful
> Task :compileJava
/.../core-module/src/java/../OAuthUtils.java:12: error: package org.apache.http does not exist
import org.apache.http.Header;
...
//FAILED!
Here ./gradlew core-module:compileJava works perfectly but compilation fails when invoked from root.
- How shall I deal with it?
- Is it because of some local jars referred from file-system?
EDIT
I found that the compilation of root sourceSets{} which is pointing to child sub-module is failing and individual sub-module compilation is successful.
But, I need this sourceSets{} for creating one monolithic jar of all sub-module
Note:- I'm not creating fatJar or shadedJar here, But I need to include all packages from all sub-modules without dependency jars.
答案1
得分: 0
这是我成功创建单个大型JAR文件，其中包括所有“子模块”的方法：
jar {
dependsOn compileJava
manifest {
def userName = System.properties['user.name']
def javaVersion = JavaVersion.current()
attributes 'Manifest-Version': "1.0"
attributes 'Built-By': userName
attributes 'Created-By': "Java Version: " + javaVersion
}
destinationDir(file("$buildDir/image"))
baseName(jarName)
from project('core-module').sourceSets.main.output.classesDirs
from project('lib-module').sourceSets.main.output.classesDirs
from project('lib-another-module').sourceSets.main.output.classesDirs
}
英文:
This how I'm successfully able to create the one monolithic jar from all sub-module
jar {
dependsOn compileJava
manifest {
def userName = System.properties['user.name']
def javaVersion = JavaVersion.current()
attributes 'Manifest-Version' : "1.0"
attributes 'Built-By' : userName
attributes 'Created-By' : "Java Version: " + javaVersion
}
destinationDir(file("$buildDir/image"))
baseName(jarName)
from project('core-module').sourceSets.main.output.classesDirs
from project('lib-module').sourceSets.main.output.classesDirs
from project('lib-another-module').sourceSets.main.output.classesDirs
}
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