fix: Message scope validation for forbidden scopes is incorrect

[joberstein]

Reference documentation: https://github.com/conventional-changelog/commitlint/blob/36c58e3d0ba677280a17388cb5bbf58f4627a56a/docs/reference-rules.md#scope-enum

Expected Behavior

If any of the forbidden ('never') scopes are supplied as message scopes, the scope-enum validator should fail. Otherwise, it should pass.

Current Behavior

The scope-enum validator fails only if all of the message scopes are listed as forbidden ('never') scopes. Otherwise, it passes.

Affected packages

• cli
• core
• prompt
• config-angular

Possible Solution

Rework the scope-enum 'never' validation to be it's own condition, not simply the negation of the 'always' validation.

Steps to Reproduce

{
    "rules": {
        "scope-enum": [2, "never", [
            "action",
        ]]
    },
};

Test 1:
- Command: echo 'fix(different): Test message.' | npx commitlint@18.4.2 -V
- Actual Result: Pass
- Expected Result: Pass

Test 2:
- Command: echo 'fix(action): Test message.' | npx commitlint@18.4.2 -V
- Actual Result: Failure
- Expected Result: Failure

Test 3:
- Command: echo 'fix(action,other): Test message.' | npx commitlint@18.4.2 -V
- Actual Result: Pass
- Expected Result: Failure ('action' is a forbidden scope)

---

{
    "rules": {
        "scope-enum": [2, "never", [
            "action",
            "other"
        ]]
    },
};

Test 1:
- Command: echo 'fix(action): Test message.' | npx commitlint@18.4.2 -V
- Actual Result: Failure
- Expected Result: Failure

Test 2:
- Command: echo 'fix(action,other): Test message.' | npx commitlint@18.4.2 -V
- Actual Result: Failure 
- Expected Result: Failure

Test 3:
- Command: echo 'fix(action,different): Test message.' | npx commitlint@18.4.2 -V
- Actual Result: Pass
- Expected Result: Failure ('action' is a forbidden scope)

Test 4:
- Command: echo 'fix(action,different,other): Test message.' | npx commitlint@18.4.2 -V
- Actual Result: Failure
- Expected Result: Failure

---

{
    "rules": {
        "scope-enum": [2, "never", []]
    },
};

Test 1:
- Command: echo 'fix(action): Test message.' | npx commitlint@18.4.2 -V
- Actual Result: Fail
- Expected Result: Pass (there aren't any forbidden scopes)

Context

Discovered in PR: #3725 as a result of failing tests.

commitlint --version

@commitlint/rules@18.4.0

git --version

2.41.0

node --version

20.9.0

[silversonicaxel]

As extra info:

Fixing this error will require a refactoring of tests here too https://github.com/conventional-changelog/commitlint/blob/renovate/conventional-changelog-angular-7.x/%40commitlint/rules/src/scope-enum.test.ts

Once this error is covered, conventional changelog angular 7.x could be finally released and this could resolve these issues #3698 and release-it/conventional-changelog#70

[joberstein]

As extra info:

Fixing this error will require a refactoring of tests here too https://github.com/conventional-changelog/commitlint/blob/renovate/conventional-changelog-angular-7.x/%40commitlint/rules/src/scope-enum.test.ts

Once this error is covered, conventional changelog angular 7.x could be finally released and this could resolve these issues #3698 and release-it/conventional-changelog#70

@silversonicaxel this issue was pre-existing so the conventional changelog angular upgrade can be done without addressing it.

[silversonicaxel]

Looking forward to new release! Thanks