`[ts] Cannot find module` when project rebuild

[mjbvz]

From @STayinloves on February 28, 2018 7:41

• VSCode Version:
  Version 1.20.1
  Commit f88bbf9137d24d36d968ea6b2911786bfe103002
  Date 2018-02-13T15:34:36.336Z
  Shell 1.7.9
  Renderer 58.0.3029.110
  Node 7.9.0
  Architecture x64
• OS Version:

Steps to Reproduce:

1. Clone https://github.com/Microsoft/Recognizers-Text
2. cd javascript path
3. run build script
4. edit a ts file JavaScript/packages/recognizers-number/src/number/parsers.ts for example
5. error [ts] Cannot find module '@microsoft/recognizers-text'.

reload vscode the error disappears.

rm -rf node_modules
npm run build

can also reproduce this bug.

Does this issue occur when all extensions are disabled?: Yes

Copied from original issue: microsoft/vscode#44710

[sheetalkamat]

@STayinloves can you please try latest vscode version (1.22.1) and provide exact steps if this repros.

In step "3", should i run npm run build or build.cmd in Javascript folder? the npm run build needs some lerna package and installs quite a few files like the file JavaScript/packages/recognizers-number/src/number/parsers.ts you mentioned along with node_modules folders installed in the JavaScript/packages/recognizers-number folders. Editing that file does not generate error about module resolution but deleting the node_modules as intended generates the error.

[mhegazy]

closing for now. please reopen if more information is available.

[sanxing-chen]

Sorry for overlook this timeline. I'm using the latest version(1.22.2) of VScode now, the error still happens.

@sheetalkamat for your first question, Yes, you should npm run build in the Javascript folder(the builld.cmd has the same effect).

The Lerna tool does "bootstrap" the subprojects run npm run install && npm run prepare(include building the TS projects)

More detail:

My workspace folder is the whole git project which contains.NET, Python, and Javascript.

I think one way can reproduce this error is:

1. you should open a file in specific subproject like recognizers-date-time first, cite Javascript\packages\recognizers-date-time\src\dateTime\english\dateConfiguration.ts for example. You can see the file import RegExpUtility from "@microsoft/recognizers-text". And there is no error for now.

2. Then you add a line to the end of file Patterns\English\English-DateTime.yaml. This step is meant to produce some changes in the Javascript, to the recognizers-date-time\src\dateTime\resources.

3. Then you run npm run build under the folder Javascript.

4. Wait error occurred in the Javascript\packages\recognizers-date-time\src\dateTime\english\dateConfiguration.ts.

I notice the error always occurred in the subproject I have just made changes to and doesn't happen in the other subprojects. It may because of the pattern file's changes.

pic:


You can see the recognizer-text package installed correctly under the recognizers-date-time\node_modules folder.