Add github golang lint CI pipeline

[dklimpel]

Checklist

• make test-all (UNIX) passes. CI will also test this
• unit and/or integration tests are included (if applicable)
• documentation is changed or added (if applicable)

Description of change

Related to:

• GitHub Actions based CI #786
• Research: Migrating to github actions or circleCI #649

It is only a start for using gh pipelines. Add a linting pipeline for go with github actions.

Linting is currently broken in Travis CI:

INFO: Starting build lint
golint . ./cmd/... ./matchers/... ./outputs/... ./resource/... ./system/... ./util/... || true
/bin/sh: golint: command not found

Do not lint for latest-windows. There is a failure if nothing was changed:

only new issues on pull_request: C:\Users\RUNNER~1\AppData\Local\Temp\tmp-6348-vzusUQlR5XIf\pull.patch
  Running [D:\a\_temp\b2f1ab8f-0666-4c9f-8876-3984c905d141\golangci-lint-1.58.0-windows-amd64\golangci-lint run --out-format=github-actions --new-from-patch=C:\Users\RUNNER~1\AppData\Local\Temp\tmp-6348-vzusUQlR5XIf\pull.patch --new=false --new-from-rev=] in [D:\a\goss\goss] ...
  level=error msg="Running error: context loading failed: no go files to analyze: running `go mod tidy` may solve the problem"
  level=error msg="Timeout exceeded: try increasing it by passing --timeout option"

Only lint code changes (only-new-issues: true) and not all code.
Reason is that there are some failures at the code:

Running [/Users/runner/golangci-lint-1.58.0-darwin-arm64/golangci-lint run --out-format=github-actions] in [/Users/runner/work/goss/goss] ...
  Error: error	util/config.go:99:15:	Error return value is not checked (errcheck)
  Error: error	system/service_init.go:75:9:	Error return value of `cmd.Run` is not checked (errcheck)
  Error: error	system/service_systemd.go:38:9:	Error return value of `cmd.Run` is not checked (errcheck)
  Error: error	system/service_systemd.go:57:9:	Error return value of `cmd.Run` is not checked (errcheck)
  Error: error	outputs/json.go:102:16:	Error return value of `json.Unmarshal` is not checked (errcheck)
  Error: error	outputs/junit.go:99:16:	Error return value of `xml.EscapeText` is not checked (errcheck)
  Error: error	serve.go:94:19:	Error return value of `resp.body.WriteTo` is not checked (errcheck)
  Error: error	cmd/goss/goss.go:52:21:	Error return value is not checked (errcheck)
  Error: error	cmd/goss/goss.go:56:19:	Error return value is not checked (errcheck)
  Error: error	system/file.go:48:2:	field `fi` is unused (unused)
  Error: error	system/kernel_param.go:18:2:	field `value` is unused (unused)
  Error: error	matchers/have_patterns.go:149:6:	func `appendMissingStrings` is unused (unused)
  Error: error	resource/resource.go:69:6:	func `validAttrs` is unused (unused)
  Error: error	resource/validate.go:45:2:	const `maxScanTokenSize` is unused (unused)
  Error: error	cmd/goss/goss.go:428:7:	const `msgFormat` is unused (unused)
  Error: error	serve.go:88:2:	S1035: calling net/http.CanonicalHeaderKey on the 'key' argument of (net/http.Header).Set is redundant (gosimple)
  Error: error	serve_test.go:300:2:	S1031: unnecessary nil check around range (gosimple)
  Error: error	resource/resource_list.go:42:30:	S1002: should omit comparison to bool constant, can be simplified to `!e` (gosimple)
  Error: error	resource/resource_list.go:143:30:	S1002: should omit comparison to bool constant, can be simplified to `!e` (gosimple)
  Error: error	resource/resource_list.go:[24](https://github.com/dklimpel/goss/pull/2/checks#step:4:26)4:30:	S1002: should omit comparison to bool constant, can be simplified to `!e` (gosimple)
  Error: error	util/config.go:274:10:	S1005: unnecessary assignment to the blank identifier (gosimple)
  Error: error	system/file.go:170:30:	S1010: should omit second index in slice, s[a:len(s)] is identical to s[a:] (gosimple)
  Error: error	outputs/json.go:[27](https://github.com/dklimpel/goss/pull/2/checks#step:4:29):2:	S1021: should merge variable declaration with assignment on next line (gosimple)
  Error: error	outputs/junit.go:37:2:	S1021: should merge variable declaration with assignment on next line (gosimple)
  Error: error	outputs/nagios.go:34:2:	S1021: should merge variable declaration with assignment on next line (gosimple)
  Error: error	system/service.go:14:2:	S1008: should use 'return strings.ContainsRune(s, '/')' instead of 'if strings.ContainsRune(s, '/') { return true }; return false' (gosimple)
  Error: error	outputs/rspecish.go:46:5:	SA1006: printf-style function with dynamic format string and no further arguments should use print-style function instead (staticcheck)
  Error: error	outputs/rspecish.go:49:5:	SA1006: printf-style function with dynamic format string and no further arguments should use print-style function instead (staticcheck)
  Error: error	outputs/rspecish.go:54:5:	SA1006: printf-style function with dynamic format string and no further arguments should use print-style function instead (staticcheck)
  Error: error	system/file.go:40:2:	SA9004: only the first constant in this group has an explicit type (staticcheck)
  Error: error	resource/addr.go:54:49:	SA10[29](https://github.com/dklimpel/goss/pull/2/checks#step:4:31): should not use built-in type string as key for value; define your own type to avoid collisions (staticcheck)
  Error: error	resource/command.go:52:49:	SA1029: should not use built-in type string as key for value; define your own type to avoid collisions (staticcheck)
  Error: error	resource/dns.go:55:49:	SA1029: should not use built-in type string as key for value; define your own type to avoid collisions (staticcheck)
  Error: error	util/config.go:298:6:	SA6005: should use strings.EqualFold instead (staticcheck)
  Error: error	serve_test.go:69:55:	SA1019: rr.HeaderMap has been deprecated since Go 1.11 and an alternative has been available since Go 1.7: HeaderMap exists for historical compatibility and should not be used. To access the headers returned by a handler, use the Response.Header map as returned by the Result method.  (staticcheck)
  Error: error	serve_test.go:176:55:	SA1019: rr.HeaderMap has been deprecated since Go 1.11 and an alternative has been available since Go 1.7: HeaderMap exists for historical compatibility and should not be used. To access the headers returned by a handler, use the Response.Header map as returned by the Result method.  (staticcheck)
  Error: error	matchers/type_conversion.go:7:2:	SA1019: "io/ioutil" has been deprecated since Go 1.19: As of Go 1.16, the same functionality is now provided by package [io] or package [os], and those implementations should be preferred in new code. See the specific function documentation for details.  (staticcheck)

[aelsabbahy]

@dklimpel I see lots of amazing PRs from you. It's greatly appreciated and is a considerable amount of work.

If you don't mind, can you open an issue and in there cover the order of PRs and the order they should be reviewed/merged in.

[dklimpel]

If you don't mind, can you open an issue and in there cover the order of PRs and the order they should be reviewed/merged in.

I have opend #911

[aelsabbahy]

cool, didn't know this was a thing!

[aelsabbahy]

Wow, the macOS build is extremely slow?

Also. I would think for linting Linux (or really any single OS) would be sufficient. I wouldn't think golangci-lint would give different results depending on OS.

[dklimpel]

I think Gihub has a few problems today. The job is finished and does not report the status back:

[aelsabbahy]

Ah, yeah the output was confusing me. Either way, I think we can lint on just Linux and save GH some compute time 😄

Thanks for the quick response.

[dklimpel]

Same result on linux only :/

[aelsabbahy]

Awesome, thank you. Appreciate the permission lockdown =)