upgrade go to 1.19 and pin cosign-installer to v2 (#203)

* upgrade go to 1.19 and pin cosign-installer to v2

Signed-off-by: cpanato <ctadeu@gmail.com>

* update golangci-lint to v1.48.0

Signed-off-by: cpanato <ctadeu@gmail.com>

* remove io/ioutil deprecations

Signed-off-by: cpanato <ctadeu@gmail.com>

Signed-off-by: cpanato <ctadeu@gmail.com>

.github/workflows/ci.yaml

@@ -81,4 +81,4 @@ jobs:
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v3
         with:
-          version: v1.46.2
+          version: v1.48.0

go.mod

@@ -1,6 +1,6 @@
 module github.com/helm/chart-releaser
 
-go 1.18
+go 1.19
 
 require (
 	github.com/Songmu/retry v0.1.0

pkg/git/git.go

@@ -16,7 +16,6 @@ package git
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"strings"
@@ -26,7 +25,7 @@ type Git struct{}
 
 // AddWorktree creates a new Git worktree with a detached HEAD for the given committish and returns its path.
 func (g *Git) AddWorktree(workingDir string, committish string) (string, error) {
-	dir, err := ioutil.TempDir("", "chart-releaser-")
+	dir, err := os.MkdirTemp("", "chart-releaser-")
 	if err != nil {
 		return "", err
 	}

pkg/packager/packager.go

@@ -16,7 +16,7 @@ package packager
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io"
 	"os"
 	"path/filepath"
 
@@ -67,7 +67,7 @@ func (p *Packager) CreatePackages() error {
 		}
 
 		downloadManager := &downloader.Manager{
-			Out:              ioutil.Discard,
+			Out:              io.Discard,
 			ChartPath:        path,
 			Keyring:          helmClient.Keyring,
 			Getters:          getters,

pkg/packager/packager_test.go

@@ -15,7 +15,6 @@
 package packager
 
 import (
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -27,7 +26,7 @@ import (
 )
 
 func TestPackager_CreatePackages(t *testing.T) {
-	packagePath, _ := ioutil.TempDir(".", "packages")
+	packagePath, _ := os.MkdirTemp(".", "packages")
 	invalidPackagePath := filepath.Join(packagePath, "bad")
 	file, _ := os.Create(invalidPackagePath)
 	t.Cleanup(func() {

pkg/releaser/releaser_test.go

@@ -17,7 +17,6 @@ package releaser
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -41,7 +40,7 @@ type FakeGit struct {
 }
 
 func (f *FakeGit) AddWorktree(workingDir string, committish string) (string, error) {
-	dir, err := ioutil.TempDir("", "chart-releaser-")
+	dir, err := os.MkdirTemp("", "chart-releaser-")
 	if err != nil {
 		return "", err
 	}
@@ -98,7 +97,7 @@ func (f *FakeGitHub) CreatePullRequest(owner string, repo string, message string
 }
 
 func TestReleaser_UpdateIndexFile(t *testing.T) {
-	indexDir, _ := ioutil.TempDir(".", "index")
+	indexDir, _ := os.MkdirTemp(".", "index")
 	defer os.RemoveAll(indexDir)
 
 	fakeGitHub := new(FakeGitHub)
@@ -180,7 +179,7 @@ func TestReleaser_UpdateIndexFile(t *testing.T) {
 }
 
 func TestReleaser_UpdateIndexFileGenerated(t *testing.T) {
-	indexDir, _ := ioutil.TempDir(".", "index")
+	indexDir, _ := os.MkdirTemp(".", "index")
 	defer os.RemoveAll(indexDir)
 
 	fakeGitHub := new(FakeGitHub)