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Getting npm-check-updates to update global packages

Michael Brown   August 19 2017 09:34:25 PM
I often use the npm-check-updates package to check the whether my npm packages are up to date.  Particularly, my globally installed npm packages, such as...well, npm-check-updates itself!!!

It does have one rather annoying limitation though: -u option, which forces the packages to upgrade, only works with locally installed (i.e. at a project level) packages.  It won't work for your global packages.  So if you issue this command in your terminal (NB: ncu is an alias to npm-check-updates):

ncu -g -u


you'll see this error: ncu cannot upgrade global packages. Run npm install -g [package] to update a global package.  This is a pain, because the npm install -g command requires you specify the packages' names, and there might be a few of these.  For example, when I just ran ncu-g on my home Mac, it flagged the following packages as out of date:

create-react-app         1.3.3  →  1.4.0
create-react-native-app  0.0.6  →  1.0.0
eslint                   4.2.0  →  4.5.0
eslint-plugin-react      7.1.0  →  7.2.1
jsdoc                    3.4.3  →  3.5.4
npm                      5.0.3  →  5.3.0
prettier                 1.5.2  →  1.5.3


To update them all, I would have to type out npm install -g followed by the full list of the packages' names.  That's a lot of typing and/or copying and pasting to get the package names that I need.  So I Googled around to see if there was a way of formatting ncu's output to produce a more update friendly list.  This is the command that I found (sorry, I can't remember where now!):

ncu -g | awk '{print $1}' | paste -sd " " -


Issuing the above command gave me straightforward list of packages to update, like so:

"create-react-app create-react-native-app eslint eslint-plugin-react jsdoc npm prettier"

All I need to do is still an npm install -g in front of that string, and I'm away.

It's not a particularly easy command to remember, so you may want to put it in a script and run it from there.



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