Improve golang CI

.github/workflows/go.yml

@@ -7,32 +7,45 @@ on:
     branches: [ main ]
 
 jobs:
-
   test:
-    name: Test
+    name: Test with latest golang
     runs-on: ubuntu-latest
     steps:
+      - name: Check out repo
+        uses: actions/checkout@v3
 
-    - name: Set up Go 1.x
+      - name: Set up latest golang
-      uses: actions/setup-go@v2
+        uses: actions/setup-go@v3
         with:
-        go-version: ^1.16
+          go-version: ^1.18
-      id: go
-
-    - name: Check out code into the Go module directory
-      uses: actions/checkout@v2
-
-    - name: Get dependencies
-      run: |
-        go get -v -t -d ./...
-        if [ -f Gopkg.toml ]; then
-            curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh
-            dep ensure
-        fi
-        go install github.com/golangci/golangci-lint/cmd/golangci-lint@latest
 
       - name: Test
         run: go test -v -race ./...
 
-    - name: Lint
+  test-old:
-      run: golangci-lint run ./...
+    name: Test with 1.15
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repo
+      uses: actions/checkout@v3
+
+    - name: Set up Go 1.15
+      uses: actions/setup-go@v3
+      with:
+        go-version: 1.15
+
+    - name: Test
+      run: go test -v -race ./...
+
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/setup-go@v3
+        with:
+          go-version: 1.17
+      - uses: actions/checkout@v3
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v3
+        with:
+          version: v1.46.2

.golangci.yml

@@ -45,3 +45,5 @@ linters:
     - varnamelen        # Forbids short var names
     - ireturn           # Prevents returning interfaces
     - forcetypeassert   # Forces to assert types in tests
+    - nonamedreturns    # Disallows named returns
+    - exhaustruct       # Forces all structs to be named

crypto/attachment_manual.go

@@ -148,7 +148,7 @@ func (keyRing *KeyRing) NewManualAttachmentProcessor(
 	return attachmentProc, nil
 }
 
-// readAll works a bit like io.ReadAll
+// readAll works a bit like ioutil.ReadAll
 // but we can choose the buffer to write to
 // and we don't grow the slice in case of overflow.
 func readAll(buffer []byte, reader io.Reader) (int, error) {

crypto/keyring_streaming_test.go

@@ -3,6 +3,7 @@ package crypto
 import (
 	"bytes"
 	"io"
+	"io/ioutil"
 	"reflect"
 	"testing"
 
@@ -65,7 +66,7 @@ func TestKeyRing_EncryptDecryptStream(t *testing.T) {
 	if err == nil {
 		t.Fatal("Expected an error while verifying the signature before reading the data, got nil")
 	}
-	decryptedBytes, err := io.ReadAll(decryptedReader)
+	decryptedBytes, err := ioutil.ReadAll(decryptedReader)
 	if err != nil {
 		t.Fatal("Expected no error while reading the decrypted data, got:", err)
 	}
@@ -88,7 +89,7 @@ func TestKeyRing_EncryptDecryptStream(t *testing.T) {
 	if err != nil {
 		t.Fatal("Expected no error while calling decrypting stream with key ring, got:", err)
 	}
-	decryptedBytes, err = io.ReadAll(decryptedReaderNoVerify)
+	decryptedBytes, err = ioutil.ReadAll(decryptedReaderNoVerify)
 	if err != nil {
 		t.Fatal("Expected no error while reading the decrypted data, got:", err)
 	}
@@ -188,7 +189,7 @@ func TestKeyRing_DecryptStreamCompatible(t *testing.T) {
 	if err != nil {
 		t.Fatal("Expected no error while calling decrypting stream with key ring, got:", err)
 	}
-	decryptedBytes, err := io.ReadAll(decryptedReader)
+	decryptedBytes, err := ioutil.ReadAll(decryptedReader)
 	if err != nil {
 		t.Fatal("Expected no error while reading the decrypted data, got:", err)
 	}
@@ -257,7 +258,7 @@ func TestKeyRing_EncryptDecryptSplitStream(t *testing.T) {
 	if err != nil {
 		t.Fatal("Expected no error while decrypting split stream with key ring, got:", err)
 	}
-	decryptedBytes, err := io.ReadAll(decryptedReader)
+	decryptedBytes, err := ioutil.ReadAll(decryptedReader)
 	if err != nil {
 		t.Fatal("Expected no error while reading the decrypted data, got:", err)
 	}
@@ -379,7 +380,7 @@ func TestKeyRing_DecryptSplitStreamCompatible(t *testing.T) {
 	if err != nil {
 		t.Fatal("Expected no error while decrypting split stream with key ring, got:", err)
 	}
-	decryptedBytes, err := io.ReadAll(decryptedReader)
+	decryptedBytes, err := ioutil.ReadAll(decryptedReader)
 	if err != nil {
 		t.Fatal("Expected no error while reading the decrypted data, got:", err)
 	}

crypto/sessionkey_streaming_test.go

@@ -3,6 +3,7 @@ package crypto
 import (
 	"bytes"
 	"io"
+	"io/ioutil"
 	"reflect"
 	"testing"
 
@@ -55,7 +56,7 @@ func TestSessionKey_EncryptDecryptStream(t *testing.T) {
 	if err != nil {
 		t.Fatal("Expected no error while calling DecryptStream, got:", err)
 	}
-	decryptedBytes, err := io.ReadAll(decryptedReader)
+	decryptedBytes, err := ioutil.ReadAll(decryptedReader)
 	if err != nil {
 		t.Fatal("Expected no error while reading the decrypted data, got:", err)
 	}
@@ -158,7 +159,7 @@ func TestSessionKey_DecryptStreamCompatible(t *testing.T) {
 	if err != nil {
 		t.Fatal("Expected no error while calling DecryptStream, got:", err)
 	}
-	decryptedBytes, err := io.ReadAll(decryptedReader)
+	decryptedBytes, err := ioutil.ReadAll(decryptedReader)
 	if err != nil {
 		t.Fatal("Expected no error while reading the decrypted data, got:", err)
 	}