Configurable cache directory

[calvinbui]

Is your feature request related to a problem? Please describe.
A configuration option to set the caching directory. By default it goes to ~/.cache/golangci-lint on Linux and ~/Library/Caches/golangci-lint on Mac

Describe the solution you'd like
The caching directory option via the run command or config file

Describe alternatives you've considered
N/A

Additional context
N/A

[boring-cyborg]

Hey, thank you for opening your first Issue ! 🙂 If you would like to contribute we have a guide for contributors.

[AlekSi]

Currently, it is possible to configure the cache directory via GOLANGCI_LINT_CACHE environment variable. But it is not documented (#734), and also not a flag or config file field requested by OP.

[ldez]

golangci-lint/internal/cache/default.go

Lines 60 to 87 in bcdfb7f

	// DefaultDir returns the effective GOLANGCI_LINT_CACHE setting.
	func DefaultDir() string {
	// Save the result of the first call to DefaultDir for later use in
	// initDefaultCache. cmd/go/main.go explicitly sets GOCACHE so that
	// subprocesses will inherit it, but that means initDefaultCache can't
	// otherwise distinguish between an explicit "off" and a UserCacheDir error.
	defaultDirOnce.Do(func() {
	defaultDir = os.Getenv("GOLANGCI_LINT_CACHE")
	if filepath.IsAbs(defaultDir) {
	return
	}
	if defaultDir != "" {
	defaultDirErr = fmt.Errorf("GOLANGCI_LINT_CACHE is not an absolute path")
	return
	}
	// Compute default location.
	dir, err := os.UserCacheDir()
	if err != nil {
	defaultDirErr = fmt.Errorf("GOLANGCI_LINT_CACHE is not defined and %v", err)
	return
	}
	defaultDir = filepath.Join(dir, "golangci-lint")
	})
	return defaultDir
	}

Introduced in #699

[AlekSi]

Not sure why close it if not a single point from #1690 (comment) is addressed.

[ldez]

Because I reopened #734 and created a PR #1871

[AlekSi]

Sorry, I don't follow.

Describe the solution you'd like
The caching directory option via the run command or config file

The environment variable is not a run command flag or config file field.

If you don't think flag/field is a good idea for some reason, explicitly saying so would send a much clear signal than closing an issue with a comment that looks like the issue wasn't really read beyond the title.