Hi people,
I am trying to add the npm module strtime so that I can use it inside the function node but I am epically failing. I am also using docker, here is what I am doing :
Dockerfile :
FROM nodered/node-red:1.2.7
RUN npm install --prefix /usr/src/node-red/node_modules/node-red/ strtime
RUN npm install --prefix /usr/src/node-red/ strtime
COPY settings.js /usr/src/node-red/node_modules/node-red/settings.js
According to the doc :
Modules loaded from your settings file must be installed in the same directory as the settings file. For most users that will be the default user directory -
~/.node-red:
But as you see I installed in both places to see if at least it would work
This is how I edited the settings.js that gets copied into the docker image to expose what I need :
functionGlobalContext: {
stime:require("strtime")
},
If I run a container using that image and I log into it :
$ docker exec -it cce9f4ecba6f /bin/bash
bash-5.0$ npm list strtime
node-red-docker@1.2.7 /usr/src/node-red
+-- node-red@1.2.7
| `-- strtime@1.1.2
`-- strtime@1.1.2
bash-5.0$ cd node_modules/node-red
bash-5.0$ ls
CHANGELOG.md README.md lib package-lock.json red.js
LICENSE bin node_modules package.json settings.js
bash-5.0$ grep -B8 functionGlobalContext settings.js
// // - code : if result is false, the HTTP error status to return
// // - reason: if result is false, the HTTP reason string to return
//},
// The following property can be used to seed Global Context with predefined
// values. This allows extra node modules to be made available with the
// Function node.
// For example,
// functionGlobalContext: { os:require('os') }
// can be accessed in a function block as:
// global.get("os")
functionGlobalContext: {
// os:require('os'),
// jfive:require("johnny-five"),
// j5board:require("johnny-five").Board({repl:false})
stime:require("strtime")
},
// `global.keys()` returns a list of all properties set in global context.
// This allows them to be displayed in the Context Sidebar within the editor.
// In some circumstances it is not desirable to expose them to the editor. The
// following property can be used to hide any property set in `functionGlobalContext`
From this I know :
- strtime is installed
- functionGlobalContext is supposed to be requiring strtime and setting it as stime
But then in my function node if I do this :
var stime = global.get('stime');
node.log(stime.strftime);
I can see in the logs the following :
node-red_1 | 9 Jan 18:30:25 - [info] Started flows
node-red_1 | 9 Jan 18:30:25 - [info] [mqtt-broker:mort_mqtt] Connected to broker: mqtts://morty:8883
node-red_1 | 9 Jan 18:30:35 - [error] [function:evaluate] TypeError: Cannot read property 'strftime' of undefined
Pretty much global.get('stime') is returning undefined.
Also if I go into the folder for the node-red module where the settings.js file is and I use the node console, I can import the function just fine :
bash-5.0$ pwd
/usr/src/node-red/node_modules/node-red
bash-5.0$ node
> require('strtime')
{ strftime: [Function: strftime],
strptime: [Function: strptime] }
> require('strtime').strftime
[Function: strftime]
I am probably doing some dumb thing here hence the module does not get exposed inside my function node, maybe someone knows what I am doing wrong ?
Thanks!
