Question 1

How do I use node-which with async/await syntax?

Accepted Answer

Call the asynchronous which() function with await, like `const resolved = await which('node')`. It returns a promise that resolves to the executable path or rejects if not found, unless you use the `nothrow` option to return null.

Question 2

What's the difference between node-which and the Unix which command?

Accepted Answer

node-which replicates the Unix which utility in Node.js, providing programmatic access with async/sync APIs for scripts. The CLI tool `node-which` mimics BSD which, but the library is designed for JavaScript integration rather than shell usage.

Question 3

Should I use node-which or child_process.exec to find executables?

Accepted Answer

node-which is specialized for PATH resolution and is more reliable for cross-platform executable discovery. child_process.exec can run commands but doesn't directly find executables; node-which simplifies this task with dedicated options.

Question 4

How to handle errors when an executable is not found with node-which?

Accepted Answer

By default, it throws an error in sync mode or rejects the promise in async mode. Use the `nothrow: true` option to return null instead, as shown in the usage examples for graceful handling.

Question 5

Can node-which find all instances of an executable in PATH?

Accepted Answer

Yes, set the `all: true` option to return an array of all matches instead of the first one. This is useful for debugging or when multiple versions exist, as specified in the OPTIONS section.

Question 6

Is node-which cross-platform compatible?

Accepted Answer

Yes, it works on Unix-like systems and Windows by handling PATH and PATHEXT appropriately. This makes it suitable for Node.js applications that need consistent executable discovery across different operating systems.

Question 7

How to install and use the node-which command line tool?

Accepted Answer

Install it globally via npm: `npm install -g node-which`. Then run commands like `node-which node` to find executables from the terminal, similar to the Unix which command but with the node-which binary name.

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