feat: add support for SuggestedFixes

[ldez]

This PR extends the support of the "autofix" to all the linters that support SuggestedFixes.

I did my best to create a reviewable PR, so there are several commits but some are more important than others.

Supported linters

• canonicalheader (new)
• dupword (new)
• err113 (new)
• errorlint (new)
• fatcontext (new)
• gci
• ginkgolinter (new)
• gocritic
• godot
• gofmt
• gofumpt
• goheader
• goimports
• gosimple (new)
  • s1001
  • s1002
  • s1003
  • s1004
  • s1005
  • s1010
  • s1011
  • s1012
  • s1016
  • s1018
  • s1021
  • s1024
  • s1025
  • s1028
  • s1030
  • s1033
  • s1034
  • s1035
  • s1036
  • s1037
  • s1039
• govet (new) (10 passes)
  • assign
  • composites
  • fieldalignment
  • findcall
  • printf
  • sigchanyzer
  • sortslice
  • stringintconv
  • timeformat
  • unreachable
• iface (new)
• importas (new)
• intrange (new)
• mirror
• misspell
• nakedret (new)
• nlreturn (new)
• nolintlint
• perfsprint (new)
• protogetter
• revive (new) (2 rules)
  • range
  • errorf
• staticcheck (new)
  • sa1004
  • sa1006
  • sa1008
  • sa1012
  • sa1013
  • sa1016
  • sa4013
  • sa4026
  • sa4029
  • sa5004
  • sa6005
  • sa9002
  • sa9004
• stylecheck (new)
  • st1013
  • st1017
  • st1018
• tagalign
• testifylint (new)
• whitespace (new)
• wsl (new)

Total: 32 linters

Before the PR only 13 linters were able to apply "autofix".

With this PR, every linter that support SuggestedFixes will be able to "autofix" without require a specific implementation inside golangci-lint or inside the linter.
And the plugins can also apply "autofix".

Recommended Usage

I recommend using the following command to apply fixes:

golangci-lint run --enable-only <linter_name> --fix

ex:

golangci-lint run --enable-only wsl --fix

I recommend not using a globally fix: true inside the configuration, or using it globally without --enable-only unless you trust all suggested fixes.

About overlaps

Also overlapping is now managed in a stable way.

The situation:

• You have 2 linters (gofmt and goimports for example)
• The 2 linters produce 2 reports/changes on the same line (ex: an import on L4)) -> overlap.
• The 2 same linters have also produced reports/changes but without overlap (ex: changes one import on L5 and another on L6)

This situation is 99% related to formatters because they want to apply changes to the same sections but not in the same way, so not in the same positions.

Before/Currently:

The overlap was managed by picking "randomly" one change for one of both linters (L4).
And all the other changes (without overlap) from the 2 linters were applied (L5, L6).

The result was a mix of non-consistent changes: deletion of imports, duplication of imports, etc.

The problem here is not the overlaps by themselves (because they are "managed") but the other changes.

With my implementation:

If there are overlaps, only one of the 2 linters is "allowed" to apply changes on the targeted file (ex: L4, L5, not L6).
The other linters that don't overlap are also "allowed" to apply changes to this file.

I tested my implementation with the examples from the issues, and it works as expected: no unexpected deletions, and no duplications.

Fixes #1779
Fixes #1490
Fixes #1728
Fixes #2161
Fixes #1726

Fixes #4885
Fixes #1510
Fixes #3819
Fixes #3454
Fixes #1510

Related to #2300
Related to #2609

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Notes

Linters that have not been migrated cannot be migrated without creating regressions.

These linters will be processed, but they require significant work so this will be done gradually.

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If you enjoy this change, and you or your company want to help golangci-lint or me:

• https://bento.me/golangci-lint
• https://bento.me/ldez

[alexandear]

Awesome work.

[bombsimon]

This is really good, thanks for putting your time and effort into this!

Extra plus for the separate commits and flow making -10k LOC not so scary. Really nice with all the tests as well!

The linters that now have disabled Cgo tests are marked with TODO, should we create a tracking issue for that? Thinking it would be easier to help out with that part.

[ldez]

The linters that now have disabled Cgo tests are marked with TODO, should we create a tracking issue for that? Thinking it would be easier to help out with that part.

#5235

[bombsimon]

🎉 Awesome