which

Like the unix which utility.

Finds the first instance of a specified executable in the PATH environment variable. Does not cache the results, so hash -r is not needed when the PATH changes.

USAGE

constwhich=require('which')// async usage// rejects if not foundconstresolved=awaitwhich('node')// if nothrow option is used, returns null if not foundconstresolvedOrNull=awaitwhich('node',{nothrow: true})// sync usage// throws if not foundconstresolved=which.sync('node')// if nothrow option is used, returns null if not foundconstresolvedOrNull=which.sync('node',{nothrow: true})// Pass options to override the PATH and PATHEXT environment vars.awaitwhich('node',{path: someOtherPath,pathExt: somePathExt})

CLI USAGE

Just like the BSD which(1) binary but using node-which.

usage: node-which [-as] program ...

You can learn more about why the binary is node-which and not whichhere

OPTIONS

You may pass an options object as the second argument.

• path: Use instead of the PATH environment variable.
• pathExt: Use instead of the PATHEXT environment variable.
• all: Return all matches, instead of just the first one. Note that this means the function returns an array of strings instead of a single string.