spawn ENOENT error

[pierreloicq]

Hi,
I put a simple test.js alone in a directory:

plotlib = require('nodeplotlib');
const data = [{x: [1, 3, 4, 5], y: [3, 12, 1, 4], type: 'line'}];
plotlib.plot(data);

then
npm install nodeplotlib

npm WARN saveError ENOENT: no such file or directory, open '/home/pierre/testPlotLib/package.json'
npm WARN enoent ENOENT: no such file or directory, open '/home/pierre/testPlotLib/package.json'

These lines appear here but not when I install for my project.
Then
node test.js

(node:5472) UnhandledPromiseRejectionWarning: Error: spawn /home/pierre/testPlotLib/node_modules/nodeplotlib/dist/lib/xdg-open ENOENT
at Process.ChildProcess._handle.onexit (internal/child_process.js:201:19)
at onErrorNT (internal/child_process.js:379:16)
at process._tickCallback (internal/process/next_tick.js:178:19)
at Function.Module.runMain (internal/modules/cjs/loader.js:697:11)
at startup (internal/bootstrap/node.js:201:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:516:3)
(node:5472) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:5472) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

I have an apache local server running, but same error when I switch it off.
Any idea ?
Thanks

[medved-nsk]

Hi, @pierreloicq
We (with colleagues) faced the same issue (and port-related one as well).
For now we suspect it caused by https://github.com/ngfelixl/nodeplotlib/blob/master/src/server.ts#L41

Upd: actually src/server.ts#L69 opn() try to run browser by xdg-open(1)
Looks like you either have no X-window (like me) or xdg mis/non-configired.

[pierreloicq]

Thanks for your reply, so I guess it's complex to repair myself

[ngfelixl]

Thanks for your issue report :) I can not reproduce it myself with 0.6.1. But I guess @medved-nsk already figured it out in this PR #18 using the node env port variable. I will have a look at it today.

[medved-nsk]

Just for the record:

1. Actually feat: use PORT env variable if provided instead of default (8080) #18 didn't solve this issue.
2. I believe it's not an issue at all but rather an expected behavior
   see my previous comment

Though it can be turn into a feature request to run provided command (i.e. curl?) instead of xdg-open and thus make it compatible with GUI-less env (docker, ci etc).

[pierreloicq]

Thanks for you replies.
xeyes & xdg-open 'https://github.com/ngfelixl/nodeplotlib/' work properly in the basic terminal

[pierreloicq]

Seems to be a npm problem, I'll investigate it

[pierreloicq]

Just to be sure, do you think my warning messages could cause the problem ?

npm install nodeplotlib
npm WARN marked-terminal@1.7.0 requires a peer of marked@^0.3.3 but none is installed. You must install peer dependencies yourself.
npm WARN arbitragesoftjs@1.0.0 No repository field.

• nodeplotlib@0.6.2
  updated 1 package and audited 680 packages in 3.615s
  found 10 vulnerabilities (1 low, 9 moderate)
  run npm audit fix to fix them, or npm audit for details