Add wrapcheck linter (#1407)

* Add failing test

* Add wrapcheck linter

Author: tomarrell

go.mod

@@ -54,6 +54,7 @@ require (
 	github.com/tdakkota/asciicheck v0.0.0-20200416190851-d7f85be797a2
 	github.com/tetafro/godot v0.4.9
 	github.com/timakin/bodyclose v0.0.0-20190930140734-f7f2e9bca95e
+	github.com/tomarrell/wrapcheck v0.0.0-20200807122107-df9e8bcb914d
 	github.com/tommy-muehle/go-mnd v1.3.1-0.20200224220436-e6f9a994e8fa
 	github.com/ultraware/funlen v0.0.3
 	github.com/ultraware/whitespace v0.0.4

go.sum

@@ -0,0 +1,19 @@
+package golinters
+
+import (
+	"github.com/tomarrell/wrapcheck/wrapcheck"
+	"golang.org/x/tools/go/analysis"
+
+	"github.com/golangci/golangci-lint/pkg/golinters/goanalysis"
+)
+
+const wrapcheckName = "wrapcheck"
+
+func NewWrapcheck() *goanalysis.Linter {
+	return goanalysis.NewLinter(
+		wrapcheckName,
+		wrapcheck.Analyzer.Doc,
+		[]*analysis.Analyzer{wrapcheck.Analyzer},
+		nil,
+	).WithLoadMode(goanalysis.LoadModeTypesInfo)
+}

pkg/golinters/wrapcheck.go

@@ -307,10 +307,15 @@ func (m Manager) GetAllSupportedLinterConfigs() []*linter.Config {
 			WithPresets(linter.PresetStyle).
 			WithLoadForGoAnalysis().
 			WithURL("https://github.com/ssgreg/nlreturn"),
+		linter.NewConfig(golinters.NewWrapcheck()).
+			WithPresets(linter.PresetStyle).
+			WithLoadForGoAnalysis().
+			WithURL("https://github.com/tomarrell/wrapcheck"),
 		linter.NewConfig(golinters.NewTparallel()).
 			WithPresets(linter.PresetStyle).
 			WithLoadForGoAnalysis().
 			WithURL("https://github.com/moricho/tparallel"),
+
 		// nolintlint must be last because it looks at the results of all the previous linters for unused nolint directives
 		linter.NewConfig(golinters.NewNoLintLint()).
 			WithPresets(linter.PresetStyle).

pkg/lint/lintersdb/manager.go

@@ -0,0 +1,19 @@
+//args: -Ewrapcheck
+package main
+
+import (
+	"encoding/json"
+)
+
+func main() {
+	do()
+}
+
+func do() error {
+	_, err := json.Marshal(struct{}{})
+	if err != nil {
+		return err // ERROR "error returned from external package is unwrapped"
+	}
+
+	return nil
+}