Use errcheck from main repo instead of golangci-lint

.github/workflows/pr.yml

@@ -18,6 +18,7 @@ jobs:
         uses: golangci/golangci-lint-action@v2
         with:
           version: latest
+          args: --verbose
   tests-on-windows:
     needs: golangci-lint # run after golangci-lint action to not produce duplicated errors
     runs-on: windows-latest

go.mod

@@ -14,7 +14,6 @@ require (
 	github.com/gofrs/flock v0.7.1
 	github.com/golangci/check v0.0.0-20180506172741-cfe4005ccda2
 	github.com/golangci/dupl v0.0.0-20180902072040-3e9179ac440a
-	github.com/golangci/errcheck v0.0.0-20181223084120-ef45e06d44b6
 	github.com/golangci/go-misc v0.0.0-20180628070357-927a3d87b613
 	github.com/golangci/goconst v0.0.0-20180610141641-041c5f2b40f3
 	github.com/golangci/gocyclo v0.0.0-20180528144436-0a533e8fa43d
@@ -28,6 +27,7 @@ require (
 	github.com/golangci/unconvert v0.0.0-20180507085042-28b1c447d1f4
 	github.com/jingyugao/rowserrcheck v0.0.0-20191204022205-72ab7603b68a
 	github.com/jirfag/go-printf-func-name v0.0.0-20191110105641-45db9963cdd3
+	github.com/kisielk/errcheck v1.4.1-0.20200802052755-ea6ea2fa7078
 	github.com/kyoh86/exportloopref v0.1.7
 	github.com/maratori/testpackage v1.0.1
 	github.com/matoous/godox v0.0.0-20190911065817-5d6d842e92eb // v1.0
@@ -66,3 +66,5 @@ require (
 	mvdan.cc/lint v0.0.0-20170908181259-adc824a0674b // indirect
 	mvdan.cc/unparam v0.0.0-20190720180237-d51796306d8f
 )
+
+replace github.com/kisielk/errcheck => /Users/sergey.vilgelm@ibm.com/icloud/projects/errcheck

go.sum

@@ -71,6 +71,7 @@ github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9
 github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
 github.com/go-ole/go-ole v1.2.1 h1:2lOsA72HgjxAuMlKpFiCbHTvu44PIVkZ5hqm3RSdI/E=
 github.com/go-ole/go-ole v1.2.1/go.mod h1:7FAglXiTm7HKlQRDeOQ6ZNUHidzCWXuZWq/1dTyBNF8=
+github.com/go-sql-driver/mysql v1.4.0 h1:7LxgVwFb2hIQtMm87NdgAVfXjnt4OePseqT1tKx+opk=
 github.com/go-sql-driver/mysql v1.4.0/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG5ZlKdlhCg5w=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
 github.com/go-toolsmith/astcast v1.0.0 h1:JojxlmI6STnFVG9yOImLeGREv8W2ocNUM+iOhR6jE7g=
@@ -119,8 +120,6 @@ github.com/golangci/check v0.0.0-20180506172741-cfe4005ccda2 h1:23T5iq8rbUYlhpt5
 github.com/golangci/check v0.0.0-20180506172741-cfe4005ccda2/go.mod h1:k9Qvh+8juN+UKMCS/3jFtGICgW8O96FVaZsaxdzDkR4=
 github.com/golangci/dupl v0.0.0-20180902072040-3e9179ac440a h1:w8hkcTqaFpzKqonE9uMCefW1WDie15eSP/4MssdenaM=
 github.com/golangci/dupl v0.0.0-20180902072040-3e9179ac440a/go.mod h1:ryS0uhF+x9jgbj/N71xsEqODy9BN81/GonCZiOzirOk=
-github.com/golangci/errcheck v0.0.0-20181223084120-ef45e06d44b6 h1:YYWNAGTKWhKpcLLt7aSj/odlKrSrelQwlovBpDuf19w=
-github.com/golangci/errcheck v0.0.0-20181223084120-ef45e06d44b6/go.mod h1:DbHgvLiFKX1Sh2T1w8Q/h4NAI8MHIpzCdnBUDTXU3I0=
 github.com/golangci/go-misc v0.0.0-20180628070357-927a3d87b613 h1:9kfjN3AdxcbsZBf8NjltjWihK2QfBBBZuv91cMFfDHw=
 github.com/golangci/go-misc v0.0.0-20180628070357-927a3d87b613/go.mod h1:SyvUF2NxV+sN8upjjeVYr5W7tyxaT1JVtvhKhOn2ii8=
 github.com/golangci/goconst v0.0.0-20180610141641-041c5f2b40f3 h1:pe9JHs3cHHDQgOFXJJdYkK6fLz2PWyYtP4hthoCMvs8=
@@ -198,14 +197,14 @@ github.com/jingyugao/rowserrcheck v0.0.0-20191204022205-72ab7603b68a/go.mod h1:x
 github.com/jirfag/go-printf-func-name v0.0.0-20191110105641-45db9963cdd3 h1:jNYPNLe3d8smommaoQlK7LOA5ESyUJJ+Wf79ZtA7Vp4=
 github.com/jirfag/go-printf-func-name v0.0.0-20191110105641-45db9963cdd3/go.mod h1:HEWGJkRDzjJY2sqdDwxccsGicWEf9BQOZsq2tV+xzM0=
 github.com/jmoiron/sqlx v1.2.0/go.mod h1:1FEQNm3xlJgrMD+FBdI9+xvCksHtbpVBBw5dYhBSsks=
+github.com/jmoiron/sqlx v1.2.1-0.20190826204134-d7d95172beb5 h1:lrdPtrORjGv1HbbEvKWDUAy97mPpFm4B8hp77tcCUJY=
 github.com/jmoiron/sqlx v1.2.1-0.20190826204134-d7d95172beb5/go.mod h1:1FEQNm3xlJgrMD+FBdI9+xvCksHtbpVBBw5dYhBSsks=
 github.com/jonboulle/clockwork v0.1.0/go.mod h1:Ii8DK3G1RaLaWxj9trq07+26W01tbo22gdxWY5EU2bo=
 github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
 github.com/jstemmer/go-junit-report v0.0.0-20190106144839-af01ea7f8024/go.mod h1:6v2b51hI/fHJwM22ozAgKL4VKDeJcHhJFhtBdhmNjmU=
 github.com/jtolds/gls v4.20.0+incompatible h1:xdiiI2gbIgH/gLH7ADydsJ1uDOEzR8yvV7C0MuV77Wo=
 github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
 github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
-github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
 github.com/kisielk/gotool v1.0.0 h1:AV2c/EiW3KqPNT9ZKl07ehoAGi4C5/01Cfbblndcapg=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/klauspost/compress v1.10.7/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdYsUV+/s2qKfXs=
@@ -221,6 +220,7 @@ github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/kyoh86/exportloopref v0.1.7 h1:u+iHuTbkbTS2D/JP7fCuZDo/t3rBVGo3Hf58Rc+lQVY=
 github.com/kyoh86/exportloopref v0.1.7/go.mod h1:h1rDl2Kdj97+Kwh4gdz3ujE7XHmH51Q0lUiZ1z4NLj8=
+github.com/lib/pq v1.0.0 h1:X5PMW56eZitiTeO7tKzZxFCSpbFZJtkMMooicw2us9A=
 github.com/lib/pq v1.0.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
 github.com/logrusorgru/aurora v0.0.0-20181002194514-a7b3b318ed4e/go.mod h1:7rIyQOR62GCctdiQpZ/zOJlFyk6y+94wXzv6RNZgaR4=
 github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
@@ -239,6 +239,7 @@ github.com/mattn/go-isatty v0.0.8/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hd
 github.com/mattn/go-isatty v0.0.11/go.mod h1:PhnuNfih5lzO57/f3n+odYbM4JtupLOxQOAqxQCu2WE=
 github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY=
 github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
+github.com/mattn/go-sqlite3 v1.9.0 h1:pDRiWfl+++eC2FEFRy6jXmQlvp4Yh3z1MJKg4UeYM/4=
 github.com/mattn/go-sqlite3 v1.9.0/go.mod h1:FPy6KqzDD04eiIsT53CuJW3U88zkxoIYsOqkbpncsNc=
 github.com/mattn/goveralls v0.0.2/go.mod h1:8d1ZMHsd7fW6IRPKQh46F2WRpyib5/X4FOpevwGNQEw=
 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
@@ -493,7 +494,6 @@ golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
-golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20180525024113-a5b4c53f6e8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190110163146-51295c7ec13a/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
@@ -526,6 +526,7 @@ golang.org/x/tools v0.0.0-20200324003944-a576cf524670/go.mod h1:Sl4aGygMT6LrqrWc
 golang.org/x/tools v0.0.0-20200414032229-332987a829c3/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20200422022333-3d57cf2e726e/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20200519015757-0d0afa43d58a/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
+golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20200625211823-6506e20df31f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20200626171337-aa94e735be7f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20200701041122-1837592efa10/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=

pkg/commands/executor.go

@@ -205,7 +205,9 @@ func computeConfigSalt(cfg *config.Config) ([]byte, error) {
 	configData.WriteString("\nbuild-tags=%s" + strings.Join(cfg.Run.BuildTags, ","))
 
 	h := sha256.New()
-	h.Write(configData.Bytes()) //nolint:errcheck
+	if _, err := h.Write(configData.Bytes()); err != nil {
+		return nil, err
+	}
 	return h.Sum(nil), nil
 }
 

pkg/golinters/errcheck.go

@@ -10,9 +10,10 @@ import (
 	"strings"
 	"sync"
 
-	errcheck "github.com/golangci/errcheck/golangci"
+	"github.com/kisielk/errcheck/errcheck"
 	"github.com/pkg/errors"
 	"golang.org/x/tools/go/analysis"
+	"golang.org/x/tools/go/packages"
 
 	"github.com/golangci/golangci-lint/pkg/config"
 	"github.com/golangci/golangci-lint/pkg/fsutils"
@@ -36,17 +37,23 @@ func NewErrcheck() *goanalysis.Linter {
 		[]*analysis.Analyzer{analyzer},
 		nil,
 	).WithContextSetter(func(lintCtx *linter.Context) {
+		// copied from errcheck
+		checker, err := getChecker(&lintCtx.Settings().Errcheck)
+		if err != nil {
+			panic(err.Error())
+		}
+		checker.Verbose = lintCtx.Cfg.Run.IsVerbose
+		checker.Tags = lintCtx.Cfg.Run.BuildTags
+
 		analyzer.Run = func(pass *analysis.Pass) (interface{}, error) {
-			prog := goanalysis.MakeFakeLoaderProgram(pass)
-			errCfg, err := genConfig(&lintCtx.Settings().Errcheck)
-			if err != nil {
-				return nil, err
-			}
-			errcheckIssues, err := errcheck.RunWithConfig(prog, errCfg)
-			if err != nil {
-				return nil, err
+			pkg := &packages.Package{
+				Fset:      pass.Fset,
+				Syntax:    pass.Files,
+				Types:     pass.Pkg,
+				TypesInfo: pass.TypesInfo,
 			}
 
+			errcheckIssues := checker.CheckPackage(pkg)
 			if len(errcheckIssues) == 0 {
 				return nil, nil
 			}
@@ -104,27 +111,32 @@ func parseIgnoreConfig(s string) (map[string]*regexp.Regexp, error) {
 	return cfg, nil
 }
 
-func genConfig(errCfg *config.ErrcheckSettings) (*errcheck.Config, error) {
+func getChecker(errCfg *config.ErrcheckSettings) (*errcheck.Checker, error) {
+	checker := errcheck.NewChecker()
+	checker.Blank = errCfg.CheckAssignToBlank
+	checker.Asserts = errCfg.CheckTypeAssertions
+
 	ignoreConfig, err := parseIgnoreConfig(errCfg.Ignore)
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to parse 'ignore' directive")
 	}
 
-	c := &errcheck.Config{
-		Ignore:  ignoreConfig,
-		Blank:   errCfg.CheckAssignToBlank,
-		Asserts: errCfg.CheckTypeAssertions,
+	checker.Ignore = map[string]*regexp.Regexp{}
+	for pkg, re := range ignoreConfig {
+		checker.Ignore[pkg] = re
 	}
+	checker.UpdateNonVendoredIgnore()
 
+	checker.AddExcludes(errcheck.DefaultExcludes)
 	if errCfg.Exclude != "" {
 		exclude, err := readExcludeFile(errCfg.Exclude)
 		if err != nil {
 			return nil, err
 		}
-		c.Exclude = exclude
+		checker.AddExcludes(exclude)
 	}
 
-	return c, nil
+	return checker, nil
 }
 
 func getFirstPathArg() string {
@@ -192,7 +204,7 @@ func setupConfigFileSearch(name string) []string {
 	return configSearchPaths
 }
 
-func readExcludeFile(name string) (map[string]bool, error) {
+func readExcludeFile(name string) ([]string, error) {
 	var err error
 	var fh *os.File
 
@@ -206,12 +218,12 @@ func readExcludeFile(name string) (map[string]bool, error) {
 		return nil, errors.Wrapf(err, "failed reading exclude file: %s", name)
 	}
 	scanner := bufio.NewScanner(fh)
-	exclude := make(map[string]bool)
+	excludes := []string{}
 	for scanner.Scan() {
-		exclude[scanner.Text()] = true
+		excludes = append(excludes, scanner.Text())
 	}
 	if err := scanner.Err(); err != nil {
 		return nil, errors.Wrapf(err, "failed scanning file: %s", name)
 	}
-	return exclude, nil
+	return excludes, nil
 }

scripts/expand_website_templates/main.go

@@ -54,7 +54,9 @@ func updateStateFile(replacements map[string]string) error {
 	}
 
 	h := sha256.New()
-	h.Write(replBytes) //nolint:errcheck
+	if _, err := h.Write(replBytes); err != nil {
+		return err
+	}
 
 	var contentBuf bytes.Buffer
 	contentBuf.WriteString("This file stores hash of website templates to trigger " +

test/run_test.go

@@ -135,7 +135,7 @@ func TestSortedResults(t *testing.T) {
 			"--sort-results=false",
 			strings.Join([]string{
 				"testdata/sort_results/main.go:12:5: `db` is unused (deadcode)",
-				"testdata/sort_results/main.go:15:13: Error return value of `returnError` is not checked (errcheck)",
+				"testdata/sort_results/main.go:15:13: Error return value is not checked (errcheck)",
 				"testdata/sort_results/main.go:8:6: func `returnError` is unused (unused)",
 			}, "\n"),
 		},
@@ -144,7 +144,7 @@ func TestSortedResults(t *testing.T) {
 			strings.Join([]string{
 				"testdata/sort_results/main.go:8:6: func `returnError` is unused (unused)",
 				"testdata/sort_results/main.go:12:5: `db` is unused (deadcode)",
-				"testdata/sort_results/main.go:15:13: Error return value of `returnError` is not checked (errcheck)",
+				"testdata/sort_results/main.go:15:13: Error return value is not checked (errcheck)",
 			}, "\n"),
 		},
 	}

test/testdata/errcheck.go

@@ -12,7 +12,7 @@ func RetErr() error {
 }
 
 func MissedErrorCheck() {
-	RetErr() // ERROR "Error return value of `RetErr` is not checked"
+	RetErr() // ERROR "Error return value is not checked"
 }
 
 func IgnoreCloseMissingErrHandling() error {

test/testdata/errcheck_exclude.go

@@ -13,6 +13,6 @@ func TestErrcheckExclude() []byte {
 }
 
 func TestErrcheckNoExclude() []byte {
-	ret, _ := ioutil.ReadAll(nil) // ERROR "Error return value of `ioutil.ReadAll` is not checked"
+	ret, _ := ioutil.ReadAll(nil) // ERROR "Error return value is not checked"
 	return ret
 }

test/testdata/errcheck_ignore.go

@@ -13,7 +13,7 @@ func TestErrcheckIgnoreOs() {
 }
 
 func TestErrcheckNoIgnoreFmt(s string) int {
-	n, _ := fmt.Println(s) // ERROR "Error return value of `fmt.Println` is not checked"
+	n, _ := fmt.Println(s) // ERROR "Error return value is not checked"
 	return n
 }
 
@@ -23,6 +23,6 @@ func TestErrcheckIgnoreIoutil() []byte {
 }
 
 func TestErrcheckNoIgnoreIoutil() []byte {
-	ret, _ := ioutil.ReadAll(nil) // ERROR "Error return value of `ioutil.ReadAll` is not checked"
+	ret, _ := ioutil.ReadAll(nil) // ERROR "Error return value is not checked"
 	return ret
 }

test/testdata/errcheck_ignore_default.go

@@ -3,15 +3,22 @@
 package testdata
 
 import (
+	"crypto/sha256"
 	"fmt"
 	"os"
 )
 
+func TestErrcheckIgnoreHashWriteByDefault() []byte {
+	h := sha256.New()
+	h.Write([]byte("food"))
+	return h.Sum(nil)
+}
+
 func TestErrcheckIgnoreFmtByDefault(s string) int {
 	n, _ := fmt.Println(s)
 	return n
 }
 
 func TestErrcheckNoIgnoreOs() {
-	_, _ = os.Open("f.txt") // ERROR "Error return value of `os.Open` is not checked"
+	_, _ = os.Open("f.txt") // ERROR "Error return value is not checked"
 }

test/testdata/errcheck_type_assertions.go

@@ -0,0 +1,7 @@
+//args: -Eerrcheck
+//config: linters-settings.errcheck.check-type-assertions=true
+package testdata
+
+func ErrorTypeAssertion(filter map[string]interface{}) bool {
+	return filter["messages_sent.messageid"].(map[string]interface{})["$ne"] != nil
+}