Support isolated folder for monorepo

[hanzhangyu]

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

For the business-oriented of monorepo repository, the folders under packages are usually owned by different business teams. There is no relationship between the business teams whether the code is repeated with other teams. Each business group only concerns its global capabilities, or whether the infrastructure is repeated.

Therefore, I want to extend a skipIsolated field to prevent duplication detection between isolated folders.

monorepo/
├─ .monorepo.config.json
├─ node_modules/
├─ packages/
│  ├─ businessA/ // for TEAM A only
│  ├─ businessB/ // for TEAM B only
├─ globals/
├─ infra /

• What is the current behavior? (You can also link to an open issue here)

the clones between packages/businessA with packages/businessB will be detected.

• What is the new behavior (if this is a feature change)?

the clones between packages/businessA with packages/businessB will be skipped.

• Other information:

---

This change is 

[kucherenko]

Thank you! Excellent idea 👍🏻

[kucherenko]

Thank you for the PR, it is a brilliant idea!

May I suggest some changes, we have a similar option named --skipLocal for show duplications across the folders, the --skipLocal used path array from options to define folders, I guess we should use the same way here, what do you think?

The result will be like:

(async () => {
  const clones = await detectClones({
    path: [
      'packages/businessA', 
      'packages/businessB', 
      'packages/businessC'
    ],
    skipIsolated: true,
    silent: true
  });
  console.log(clones);
})()

[hanzhangyu]

@kucherenko Thank you for your advice. Sorry, I didn't describe it clearly.

--skipIsolated means that submodules (packages/businessA, packages/businessB etc) can be isolated from each other when the detect path is the monorepo home project. And, other folders still want to be included in the clone code statistics normally.

(async () => {
  const clones = await detectClones({
    path: ['./'], // e.g. detect clones from packages/businessA + globals + libs
    skipIsolated: [
        [ 'packages/businessA', 'packages/businessB', 'packages/businessC'],
    ],
    silent: true
  });
  console.log(clones);
})()

[kucherenko]

ok, sounds good, will merge the PR and publish new version

[hanzhangyu]

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