MacOS安装Fast-DDS-Gen遇Gradle错误：无法设置classifier属性

背景 #

在MacOS 12.3.1系统上安装Fast-DDS-Gen，执行以下步骤：

1. 通过brew install gradle安装Gradle
2. 克隆仓库并构建：

cd ~
git clone --recursive https://github.com/eProsima/Fast-DDS-Gen.git
cd Fast-DDS-Gen
gradle assemble

错误信息 #

执行gradle assemble时出现如下错误：

> Task :buildIDLParser FAILED

FAILURE: Build failed with an exception.

* Where:
Build file '/Users/scott/Fast-DDS-Gen/thirdparty/idl-parser/build.gradle' line: 79

* What went wrong:
A problem occurred evaluating project ':idl-parser'.
> Could not set unknown property 'classifier' for task ':idl-parser:sourceJar' of type org.gradle.api.tasks.bundling.Jar.

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 1s
2 actionable tasks: 2 executed

当前Gradle环境 #

------------------------------------------------------------
Gradle 8.0.2
------------------------------------------------------------

Build time:   2023-03-03 16:41:37 UTC
Revision:     7d6581558e226a580d91d399f7dfb9e3095c2b1d

Kotlin:       1.8.10
Groovy:       3.0.13
Ant:          Apache Ant(TM) version 1.10.11 compiled on July 10 2021
JVM:          19.0.2 (Homebrew 19.0.2)
OS:           Mac OS X 12.3.1 x86_64

解决方案 #

方案1：修改构建脚本适配Gradle 8.x #

错误原因是Gradle 8.x中，Jar任务的classifier属性已被移除，替换为archiveClassifier。需要修改thirdparty/idl-parser/build.gradle文件的第79行：

• 原代码：classifier = 'sources'
• 修改为：archiveClassifier = 'sources'

修改后重新执行gradle assemble即可完成构建。

方案2：降级Gradle到兼容版本 #

Fast-DDS-Gen当前版本可能未适配Gradle 8.x，可以安装Gradle 7.x版本：

1. 卸载当前Gradle：brew uninstall gradle
2. 安装指定版本（比如7.6.3）：brew install gradle@7
3. 配置环境变量（如果需要）：echo 'export PATH="/usr/local/opt/gradle@7/bin:$PATH"' >> ~/.zshrc（若使用bash则替换为~/.bash_profile）
4. 重启终端，执行gradle -v确认版本为7.x后，重新运行gradle assemble

内容的提问来源于stack exchange，提问作者leo0807