all: upgrade to golangci-lint v1.49.0 (#329)

Fixes #242

.golangci.yml

@@ -4,7 +4,9 @@ linters:
   enable-all: true
   disable:
     - cyclop
+    - deadcode
     - errname
+    - exhaustruct
     - exhaustivestruct
     - forbidigo
     - forcetypeassert
@@ -22,12 +24,16 @@ linters:
     - lll
     - maligned
     - nlreturn
+    - nonamedreturns
+    - nosnakecase
     - paralleltest
     - prealloc
     - scopelint
+    - structcheck
     - tagliatelle
     - testpackage
     - unparam
+    - varcheck
     - varnamelen
     - wrapcheck
     - wsl

attr/make_textflag.go

@@ -11,7 +11,6 @@ import (
 	"fmt"
 	"go/format"
 	"io"
-	"io/ioutil"
 	"log"
 	"net/http"
 	"os"
@@ -107,7 +106,7 @@ func DownloadGoSourceFile(outpath, v, srcpath string) (err error) {
 		return err
 	}
 
-	if err := ioutil.WriteFile(outpath, buf.Bytes(), 0o644); err != nil {
+	if err := os.WriteFile(outpath, buf.Bytes(), 0o644); err != nil {
 		return err
 	}
 
@@ -169,7 +168,7 @@ func Parse(r io.Reader) ([]Flag, error) {
 
 // ParseFile parses text flags header file.
 func ParseFile(filename string) ([]Flag, error) {
-	b, err := ioutil.ReadFile(filename)
+	b, err := os.ReadFile(filename)
 	if err != nil {
 		return nil, err
 	}

buildtags/buildtags.go

@@ -7,9 +7,9 @@
 //
 // Any terms provided in the filename can be thought of as an implicit extra
 // constraint comment line. Collectively, these are referred to as
-// ``constraints''. Each line is a ``constraint''. Within each constraint the
+// “constraints”. Each line is a “constraint”. Within each constraint the
-// space-separated terms are ``options'', and within that the comma-separated
+// space-separated terms are “options”, and within that the comma-separated
-// items are ``terms'' which may be negated with at most one exclaimation mark.
+// items are “terms” which may be negated with at most one exclaimation mark.
 //
 // These represent a boolean formulae. The constraints are evaluated as the AND
 // of constraint lines; a constraint is evaluated as the OR of its options and

gotypes/components.go

@@ -99,7 +99,6 @@ func (c *component) Dereference(r reg.Register) Component {
 //		Len  int
 //		Cap  int
 //	}
-//
 var slicehdroffsets = Sizes.Offsetsof([]*types.Var{
 	types.NewField(token.NoPos, nil, "Data", types.Typ[types.Uintptr], false),
 	types.NewField(token.NoPos, nil, "Len", types.Typ[types.Int], false),

internal/cmd/docgen/main.go

@@ -8,7 +8,6 @@ import (
 	"errors"
 	"flag"
 	"fmt"
-	"io/ioutil"
 	"log"
 	"math"
 	"net/url"
@@ -84,7 +83,7 @@ func mainerr() (err error) {
 
 	// Output.
 	if *output != "" {
-		err = ioutil.WriteFile(*output, body, 0o640)
+		err = os.WriteFile(*output, body, 0o640)
 	} else {
 		_, err = os.Stdout.Write(body)
 	}
@@ -103,7 +102,7 @@ var templates embed.FS
 func load() (string, error) {
 	// Prefer explicit filename, if provided.
 	if *tmpl != "" {
-		b, err := ioutil.ReadFile(*tmpl)
+		b, err := os.ReadFile(*tmpl)
 		if err != nil {
 			return "", err
 		}
@@ -125,7 +124,7 @@ func load() (string, error) {
 
 // include template function.
 func include(filename string) (string, error) {
-	b, err := ioutil.ReadFile(filename)
+	b, err := os.ReadFile(filename)
 	if err != nil {
 		return "", err
 	}

internal/inst/table_test.go

@@ -1,7 +1,7 @@
 package inst_test
 
 import (
-	"io/ioutil"
+	"os"
 	"reflect"
 	"sort"
 	"strings"
@@ -187,7 +187,7 @@ func TestInstructionArities(t *testing.T) {
 }
 
 func TestStdLibOpcodes(t *testing.T) {
-	b, err := ioutil.ReadFile("testdata/stdlibopcodes.txt")
+	b, err := os.ReadFile("testdata/stdlibopcodes.txt")
 	if err != nil {
 		t.Fatal(err)
 	}

internal/test/utils.go

@@ -4,7 +4,6 @@ package test
 import (
 	"flag"
 	"io"
-	"io/ioutil"
 	"log"
 	"os"
 	"os/exec"
@@ -32,7 +31,7 @@ func Assembles(t *testing.T, asm []byte) {
 	defer clean()
 
 	asmfilename := filepath.Join(dir, "asm.s")
-	if err := ioutil.WriteFile(asmfilename, asm, 0o600); err != nil {
+	if err := os.WriteFile(asmfilename, asm, 0o600); err != nil {
 		t.Fatal(err)
 	}
 
@@ -46,7 +45,7 @@ func Assembles(t *testing.T, asm []byte) {
 func TempDir(t *testing.T) (string, func()) {
 	t.Helper()
 
-	dir, err := ioutil.TempDir("", "avo")
+	dir, err := os.MkdirTemp("", "avo")
 	if err != nil {
 		t.Fatal(err)
 	}

script/bootstrap

@@ -4,7 +4,9 @@
 go install ./internal/cmd/asmvet
 
 # golangci-lint for linting
-go install github.com/golangci/golangci-lint/cmd/golangci-lint@v1.45.3-0.20220410144555-f36840520dec
+golangci_lint_version='v1.49.0'
+golangci_install_script="https://raw.githubusercontent.com/golangci/golangci-lint/${golangci_lint_version}/install.sh"
+curl -sfL "${golangci_install_script}" | sh -s -- -b "$GOPATH/bin" "${golangci_lint_version}"
 
 # embedmd required for documentation generation
 go install github.com/campoy/embedmd@v1.0.0