sharing NPM script/app through azure devops organizations using azure artifacts - node.js

Question

I have a git repository containing a node.js "app" (only 1 file) with its package.json.
I need to use that "app" from azure devops pipeline of other organizations, so I made a pipeline in that nodejs project that makes a versioning+publish of that script on a NPM based azure artifact feed.
On another organization, in the pipeline where I wanted to use that app, I used an "npm" task configured like that :
steps:
- task: Npm#1
displayName: 'npm install MyPackage'
inputs:
command: custom
verbose: false
customCommand: 'install MyPackage'
customRegistry: useFeed
customFeed: '...some-guid....'
The installs seems ok (I created a feed in the 2nd organization with the feed of 1st organization as upstream source as indicated in the doc).
Now, how am I supposed to exec that script in the next pipeline task ?
I tried to connect to the agent, but when I run "MyPackage" command, I get "command not found".
Where is the script installed ? How am I supposed to execute it ?
Is there something to put in the PATH ?
Should I use the "-g" option ?
Thanks for your help :)
Updating with the requested logs :
Task log :
Starting: npm custom
==============================================================================
Task : npm
Description : Install and publish npm packages, or run an npm command. Supports npmjs.com and authenticated registries like Azure Artifacts.
Version : 1.182.0
Author : Microsoft Corporation
Help : https://learn.microsoft.com/azure/devops/pipelines/tasks/package/npm
==============================================================================
/usr/local/bin/npm --version
6.13.7
/usr/local/bin/npm config list
; cli configs
metrics-registry = "https://pkgs.dev.azure.com/org/_packaging/....some-guid..../npm/registry/"
scope = ""
user-agent = "npm/6.13.7 node/v13.11.0 darwin x64"
; environment configs
userconfig = "/Users/.../AGENTS/vsts-agent-osx-x64-2.179.0-AZURE-01/_work/10/npm/33366.npmrc"
; userconfig /Users/.../AGENTS/vsts-agent-osx-x64-2.179.0-AZURE-01/_work/10/npm/33366.npmrc
registry = "https://pkgs.dev.azure.com/org/_packaging/....some-guid..../npm/registry/"
; builtin config undefined
prefix = "/usr/local"
; node bin location = /usr/local/Cellar/node/13.11.0/bin/node
; cwd = /Users/.../AGENTS/vsts-agent-osx-x64-2.179.0-AZURE-01/_work/10/s
; HOME = /Users/...
; "npm config ls -l" to show all defaults.
/usr/local/bin/npm install -g MyPackage
+ MyPackage#1.0.20210216-1
added 198 packages from 99 contributors in 18.319s
Finishing: npm custom
Here is the 2nd definition :
steps:
- script: |
echo "1"
node MyPackage
echo "2"
MyPackage
displayName: 'Command Line Script'
And the associated execution log :
Starting: Command Line Script
==============================================================================
Task : Command line
Description : Run a command line script using Bash on Linux and macOS and cmd.exe on Windows
Version : 2.182.0
Author : Microsoft Corporation
Help : https://learn.microsoft.com/azure/devops/pipelines/tasks/utility/command-line
==============================================================================
Generating script.
========================== Starting Command Output ===========================
/bin/bash --noprofile --norc /Users/.../AGENTS/vsts-agent-osx-x64-2.179.0-AZURE-01/_work/_temp/7fe7833a-ce7d-48af-ab8f-1fcf2e740c36.sh
1
internal/modules/cjs/loader.js:979
throw err;
^
Error: Cannot find module '/Users/.../AGENTS/vsts-agent-osx-x64-2.179.0-AZURE-01/_work/10/s/MyPackage'
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:976:15)
at Function.Module._load (internal/modules/cjs/loader.js:859:27)
at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)
at internal/main/run_main_module.js:17:47 {
code: 'MODULE_NOT_FOUND',
requireStack: []
}
2
/Users/.../AGENTS/vsts-agent-osx-x64-2.179.0-AZURE-01/_work/_temp/7fe7833a-ce7d-48af-ab8f-1fcf2e740c36.sh: line 5: MyPackage: command not found
##[error]Bash exited with code '127'.
Finishing: Command Line Script

Answer 1

We could add an Azure Artifacts feed in a different organization within your Azure AD tenant as an upstream source.
For example, you create a feed in the first organization, and add npm package to the feed, now you want to use the package in the second organization, we need to set the upstream source in the second organization feed, such as azure-feed://myOrg/myProject/myFeed#local, then we could install and use the package in the second organization pipeline.
You could also check this blog for more details.
Update1
I need to find the path where it is installed
We could add task Command line and run npm list to see the installed non-global libraries for your current location. Check this ticket and blog for more details.
The install path is $(Build.SourcesDirectory)/node_modules, we could add task bash and run ls '$(Build.SourcesDirectory)/node_modules' to check it.

Answer 2

Finally found the issues :
1st I had to install the package globally with the -g option
2nd I had to use npx to
run it.
3rd I had to update the package.json with :
"bin": {
"NAME_OF_THE_BINARY": "./FILE_TO_EXECUTE.js"
},