javascriptbashshellnpm-scriptsshelljs

How to wait for a process in a JS NPM script using ShellJS

Node version: v.10.15.3

ShellJS version: 0.8.3

Operating system: Windows 10

Is it possible to wait for a process to finish and then start another one using the wait command in a windows system in a NodeJS script?

I have tried the below, there are no errors, but the echoes are not printed and the script some_npm_script is not executed, is it possible? like I did below? This works in a Linux machine BTW.

Commands like shell.exec(truncate -s 0 ./somefile.js) works and but I do not see the truncate command in the source on the ShellJS module.

shell.exec(`
echo "Installing"
yarn add some_npm_package &
pid=$!
wait $pid
echo "Done installing"
yarn some_npm_script
`);

Any assistance is appreciated, any explanation on why it is not working or any solution or resources, thanks.

Solution

  • I've achieved my goal by moving that specific piece of code into a bash/sh NPM script, and then I have used the shell.exec function froom shellJS to execute the bash NPM script in the JS NPM script like:

    shell.exec(yarn bash_npm_script_name) // the script that uses the wait command

    So this worked for me, it waited for the package to be installed and then run a script after it was finished.