How to debug typescript application with pm2?

[sinelshchikovigor]

Is there a way to debug typescript application with pm2?

I'm launching my application using the following command:
"start": "./node_modules/.bin/pm2 start --node-args="--inspect" --watch src/ src/server/server.ts"

I've also tried to specify node-args using json configuration but it doesn't help.

Could you please help me with it?

[michalchochol]

Hi
if you use ecosystem.json to start your process, you can configure debugger this way:

"apps": [
{
"name": "API",
"script": "app.ts",
"instances": 1,
"exec_mode": "fork",
"watch": [
"app.ts",
"src"
],
"ignore_watch": [
"node_modules"
],
"log_date_format": "YYYY-MM-DD HH:mm:ss Z",
"node_args": [
"--inspect=7000"
]
}
]

IMPORTANT: it works only with ts-node < 5.0.0, because this version does not accept node advanced flags anymore.

I'm looking for the solution to work with newest ts-node version which is installed by default together with typescript using "pm2 install typescript"

[marcj]

Pm2 with ts-node in current version is currently not usable in development due to handling of node_args. The debugger does not work currently. Downgrading to < ts-node is not easily possible as pm2 installs its own ts-node, always to the latest in

pm2/lib/API/Modules/Modularizer.js

Line 32 in 0d00936

'typescript': {dependencies: [{name: 'typescript'}, {name: 'ts-node@latest'}]},

Any way to fix that?

See TypeStrong/ts-node#537 for more information.

[wallet77]

I'm not sure if it will work because I never tested it.

But you can try overriding typescript installation (to downgrade ts-node) into your ecosystem.json

"dependencies": {
  "typescript": {
    dependencies: [
      {name: 'typescript'},
      {name: 'ts-node@[tagOrVersion]'}
    ]
  }
}

[michalchochol]

Below manual ts-node folder replacement that works for me:

1. install last version of ts-node working with debugger
   pm2 install ts-node@4.1.0

2. remove existing ts-node dependency (with version >5.0.0) from pm2:
   rm ~/.nvm/versions/node/v8.9.4/lib/node_modules/pm2/node_modules/ts-node -R

3. copy existing ts-node@4.1.0 folder to pm2 dependencies:
   cp ~/.nvm/versions/node/v8.9.4/lib/node_modules/ts-node ~/.nvm/versions/node/v8.9.4/lib/node_modules/pm2/node_modules -R

[agborkowski]

is there any fancy way instead of downgrade ts ?

[RusinovAnton]

I'm interested in this too