gradle - Gradle无法正确执行外部命令

Question

我有以下gradle任务，可使用npm构建前端代码:

task buildFrontend() {
    doLast {
        exec {
            workingDir "src/ui"
            commandLine "npm", "install"
            commandLine "npm", "run", "build"
        }
...
}

但是，当我运行构建时，出现以下错误:

...
> Task :solutions:dash:buildFrontend FAILED

...
> ng build --base-href /p/ --prod

sh: 1: ng: not found
npm ERR! code ELIFECYCLE
npm ERR! syscall spawn
npm ERR! file sh
npm ERR! errno ENOENT
npm ERR! dash@0.0.0 build: `ng build --base-href /p/ --prod`
npm ERR! spawn ENOENT
npm ERR! 
npm ERR! Failed at the dash@0.0.0 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm WARN Local package.json exists, but node_modules missing, did you mean to install?
...

FAILURE: Build failed with an exception.
...

* What went wrong:
Execution failed for task ':solutions:dash:buildFrontend'.
> Process 'command 'npm'' finished with non-zero exit value 1
...

但是，当我 cd到 src/ui目录并从终端运行 npm install，然后重新运行gradle构建时，它将成功。
似乎Gradle无法执行 commandLine "npm", "install"的方式和结果与我从终端手动执行的方式相同。
但为什么？这两个命令-gradle build和manual npm install由同一用户从终端执行...

Answer 1

将exec块分成两部分后，如下所示:

exec {
    workingDir "src/ui"
    commandLine "npm", "install"
}
exec {
    workingDir "src/ui"
    commandLine "npm", "run", "build"
}

该应用程序的构建没有错误。