How to execute a command from a certain directory in Inno Setup script

Question

I have multiple cmd commands which is about installing npm components. I don't want to use batch file for this purpose. How can I execute these commands through Exec function in an Inno Sectum script and I want the installer to wait until these commands get executed?

Here are some example commands I wish to execute also they need to be executed on specified directory:

npm install forever-monitor
npm install ip

Answer 1

Inno Setup Exec function takes WorkingDir as the third parameter.

So you can do

Exec('npm', 'install forever-monitor', ExpandConstant('{pf}\nodejs'),
     SW_HIDE, ewWaitUntilTerminated, ResultCode);

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Though in this case, I would question, whether npm really needs to be executed from its directory. It is likely, that all you actually need is to execute npm with a full path:

Exec(ExpandConstant('{pf}\nodejs\npm'), 'install forever-monitor', '',
     SW_HIDE, ewWaitUntilTerminated, ResultCode);