In a different directory than NR, I tried installing a node module, separate from NR, # npm install . I got module not found using a require(''). So I did an uninstall, then global install of the module, # npm install -g . This resulted in EACCESS errors. What am I missing, are global install of…

[image] Nodi.Rubrum: Is NR variant of npm not installed with a version manager for npm? There is no such thing as a node-red variant of npm. You have whatever version of npm you have. If you're using the Pi install script we provide, you'll have got whatever version of npm is packaged with th…

So node_modules under .node-red is a local repo, right? Modules in that 'dir tree' would be invisible to a require 'call' from some other directory not under .node-red, say /root for example, right? Thus npm run under .node-red is in 'effect' a local scope for npm. Especially if you do not use '-…

npm (not -g) installs to the current directory (ie node_modules is in the current directory). npm -g installs to a system location and on Linux will generally require sudo to write there, that is why you got the access permission error (you didn't use sudo). On linux generally it is either sudo npm …

Cool. Thanks for details. Just seemed odd a module installed with -g using root, could get an EACCESS error.

This is good not odd. Global installs need root to install but not necessarily to run. That's because of the fact that global installs need write access to system folders. Read/execute access is then available to all. So global installs are protected from change by ordinary users. In general thoug…

[image] Nodi.Rubrum: Just seemed odd a module installed with -g using root, could get an EACCESS error. I had missed the fact that you said you ran npm as root. Can you repeat that and post the resulting output please?

Rats... I reset the environment.. If I get the chance will try to recreate the scenario. Moreover, I still see module not found issues for odd reasons in just using node. Google is just buried in issues and possible fixes to when or how node modules are not found, the prefix is wrong, or the NODE_…

Another question... is there a way to programmatically determine if code is running under NR versus just node? It would be cool if I could use console.log() versus node.log() at the appropriate time... using just node in writing the bulk of the code logic, for me, is faster than loading it into NR …

Maybe it could simply be declaring: var node = node ? node : { log: console.log, error: console.error, warn: console.warn, debug: console.debug, trace: console.trace }; The unneeded log functions could be left out and that made into a simple one liner: var node = node ? node : { log: co…

Using modules with nodejs separate from NR?

General

Steve-Mcl 4 August 2020 06:54 10

Probably yes but a simple way would be to use an env variable e.g....

process.env.WITHOUTNODERED

If you determine you are NOT in node-red, then you could set node.xxxx functions to proxy functions instead of littering your code with if(isNodeRed) node.log(X) else console.log(X)

More info on env vars...

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Using modules with nodejs separate from NR?

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