Replace deprecated ioutil functions with their io or os equilvalents

check_depends.go

@@ -2,14 +2,14 @@ package main
 
 import (
 	"fmt"
-	"golang.org/x/mod/modfile"
-	"golang.org/x/tools/go/vcs"
-	"io/ioutil"
 	"log"
 	"os"
 	"path/filepath"
-	"pault.ag/go/debian/control"
 	"strings"
+
+	"golang.org/x/mod/modfile"
+	"golang.org/x/tools/go/vcs"
+	"pault.ag/go/debian/control"
 )
 
 type dependency struct {
@@ -92,7 +92,7 @@ func execCheckDepends(args []string) {
 // i.e. it returns the one defined in go.mod as well as the transitively ones
 // TODO: this may not be the best way of doing thing since it requires the package to be converted to go module
 func parseGoModDependencies(directory string, goBinaries map[string]string) ([]dependency, error) {
-	b, err := ioutil.ReadFile(filepath.Join(directory, "go.mod"))
+	b, err := os.ReadFile(filepath.Join(directory, "go.mod"))
 	if err != nil {
 		return nil, err
 	}

check_depends_test.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"reflect"
@@ -43,7 +42,7 @@ Description: read your RSS feeds from your terminal
  Terminews is a terminal based application (TUI)
  that allows you to manage RSS resources and display their news feeds.
 `
-	tmpDir, err := ioutil.TempDir("", "dh-make-golang")
+	tmpDir, err := os.MkdirTemp("", "dh-make-golang")
 	if err != nil {
 		t.Fatalf("Could not create temp dir: %v", err)
 	}
@@ -52,7 +51,7 @@ Description: read your RSS feeds from your terminal
 	if err := os.MkdirAll(filepath.Join(tmpDir, "dummy-package", "debian"), 0750); err != nil {
 		t.Fatalf("Could not create dummy Debian package: %v", err)
 	}
-	if err := ioutil.WriteFile(filepath.Join(tmpDir, "dummy-package", "debian", "control"), []byte(f), 0640); err != nil {
+	if err := os.WriteFile(filepath.Join(tmpDir, "dummy-package", "debian", "control"), []byte(f), 0640); err != nil {
 		t.Fatalf("Could not create dummy Debian package: %v", err)
 	}
 
@@ -99,7 +98,7 @@ require (
 	github.com/google/go-github/v38 v38.1.0
 	github.com/gregjones/httpcache v0.0.0-20190611155906-901d90724c79
 )`
-	tmpDir, err := ioutil.TempDir("", "dh-make-golang")
+	tmpDir, err := os.MkdirTemp("", "dh-make-golang")
 	if err != nil {
 		t.Fatalf("Could not create temp dir: %v", err)
 	}
@@ -108,7 +107,7 @@ require (
 	if err := os.MkdirAll(filepath.Join(tmpDir, "dummy-package"), 0750); err != nil {
 		t.Fatalf("Could not create dummy Debian package: %v", err)
 	}
-	if err := ioutil.WriteFile(filepath.Join(tmpDir, "dummy-package", "go.mod"), []byte(f), 0640); err != nil {
+	if err := os.WriteFile(filepath.Join(tmpDir, "dummy-package", "go.mod"), []byte(f), 0640); err != nil {
 		t.Fatalf("Could not create dummy Debian package: %v", err)
 	}
 

create_salsa_project.go

@@ -3,7 +3,7 @@ package main
 import (
 	"flag"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"log"
 	"net/http"
 	"net/url"
@@ -41,7 +41,7 @@ func execCreateSalsaProject(args []string) {
 		log.Fatalf("http post: %s", err)
 	}
 	if got, want := resp.StatusCode, http.StatusOK; got != want {
-		b, _ := ioutil.ReadAll(resp.Body)
+		b, _ := io.ReadAll(resp.Body)
 		log.Fatalf("unexpected HTTP status code: got %d, want %d (response: %s)", got, want, string(b))
 	}
 }

estimate.go

@@ -4,7 +4,6 @@ import (
 	"flag"
 	"fmt"
 	"go/build"
-	"io/ioutil"
 	"log"
 	"os"
 	"os/exec"
@@ -59,7 +58,7 @@ func removeVendor(gopath string) (found bool, _ error) {
 
 func estimate(importpath string) error {
 	// construct a separate GOPATH in a temporary directory
-	gopath, err := ioutil.TempDir("", "dh-make-golang")
+	gopath, err := os.MkdirTemp("", "dh-make-golang")
 	if err != nil {
 		return fmt.Errorf("create temp dir: %w", err)
 	}

make.go

@@ -5,7 +5,6 @@ import (
 	"flag"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"log"
 	"net/http"
 	"net/url"
@@ -174,7 +173,7 @@ func (u *upstream) tarballFromHoster() error {
 }
 
 func (u *upstream) tar(gopath, repo string) error {
-	f, err := ioutil.TempFile("", "dh-make-golang")
+	f, err := os.CreateTemp("", "dh-make-golang")
 	if err != nil {
 		return fmt.Errorf("create temp file: %w", err)
 	}
@@ -339,7 +338,7 @@ func (u *upstream) findDependencies(gopath, repo string) error {
 }
 
 func makeUpstreamSourceTarball(repo, revision string, forcePrerelease bool) (*upstream, error) {
-	gopath, err := ioutil.TempDir("", "dh-make-golang")
+	gopath, err := os.MkdirTemp("", "dh-make-golang")
 	if err != nil {
 		return nil, fmt.Errorf("create tmp dir: %w", err)
 	}
@@ -656,7 +655,7 @@ func getDebianEmail() string {
 	if email := strings.TrimSpace(os.Getenv("DEBEMAIL")); email != "" {
 		return email
 	}
-	mailname, err := ioutil.ReadFile("/etc/mailname")
+	mailname, err := os.ReadFile("/etc/mailname")
 	// By default, /etc/mailname contains "debian" which is not useful; check for ".".
 	if err == nil && strings.Contains(string(mailname), ".") {
 		if u, err := user.Current(); err == nil && u.Username != "" {

version_test.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -22,14 +21,14 @@ func TestSnapshotVersion(t *testing.T) {
 	os.Setenv("TZ", "UTC")
 	defer os.Unsetenv("TZ")
 
-	tempdir, err := ioutil.TempDir("", "dh-make-golang")
+	tempdir, err := os.MkdirTemp("", "dh-make-golang")
 	if err != nil {
 		t.Fatalf("Could not create temp dir: %v", err)
 	}
 	defer os.RemoveAll(tempdir)
 
 	tempfile := filepath.Join(tempdir, "test")
-	if err := ioutil.WriteFile(tempfile, []byte("testcase"), 0644); err != nil {
+	if err := os.WriteFile(tempfile, []byte("testcase"), 0644); err != nil {
 		t.Fatalf("Could not write temp file %q: %v", tempfile, err)
 	}
 
@@ -64,7 +63,7 @@ func TestSnapshotVersion(t *testing.T) {
 		t.Logf("got %q, want %q", got, want)
 	}
 
-	if err := ioutil.WriteFile(tempfile, []byte("testcase 2"), 0644); err != nil {
+	if err := os.WriteFile(tempfile, []byte("testcase 2"), 0644); err != nil {
 		t.Fatalf("Could not write temp file %q: %v", tempfile, err)
 	}
 
@@ -84,7 +83,7 @@ func TestSnapshotVersion(t *testing.T) {
 		t.Logf("got %q, want %q", got, want)
 	}
 
-	if err := ioutil.WriteFile(tempfile, []byte("testcase 3"), 0644); err != nil {
+	if err := os.WriteFile(tempfile, []byte("testcase 3"), 0644); err != nil {
 		t.Fatalf("Could not write temp file %q: %v", tempfile, err)
 	}