chore: update dependencies

.github/workflows/codeql.yml

@@ -40,11 +40,11 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v2
+      uses: github/codeql-action/init@v3
       with:
         languages: ${{ matrix.language }}
         # If you wish to specify custom queries, you can do so here or in a config file.
@@ -58,7 +58,7 @@ jobs:
     # Autobuild attempts to build any compiled languages  (C/C++, C#, Go, or Java).
     # If this step fails, then you should remove it and run the build manually (see below)
     - name: Autobuild
-      uses: github/codeql-action/autobuild@v2
+      uses: github/codeql-action/autobuild@v3
 
     # ℹ️ Command-line programs to run using the OS shell.
     # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
@@ -71,6 +71,6 @@ jobs:
     #     ./location_of_script_within_repo/buildscript.sh
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v2
+      uses: github/codeql-action/analyze@v3
       with:
         category: "/language:${{matrix.language}}"

.github/workflows/go.yml

@@ -14,12 +14,12 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v5
         with:
-          go-version: 1.19
+          go-version: 1.22
 
       - name: Build
         run: go build -v ./...

Makefile

@@ -6,3 +6,8 @@ integration:
 	go run github.com/d--j/go-milter/integration/runner -filter '.*' -mtaFilter '.*' ./tests
 
 .PHONY: integration
+
+integration-only-mock:
+	cd integration && go run github.com/d--j/go-milter/integration/runner -filter '.*' -mtaFilter 'mock' ./tests
+
+.PHONY: only-mock

go.mod

@@ -3,9 +3,7 @@ module github.com/d--j/go-milter
 go 1.18
 
 require (
-	github.com/emersion/go-message v0.17.0
-	golang.org/x/net v0.23.0
-	golang.org/x/text v0.14.0
+	github.com/emersion/go-message v0.18.1
+	golang.org/x/net v0.34.0
+	golang.org/x/text v0.21.0
 )
-
-require github.com/emersion/go-textwrapper v0.0.0-20200911093747-65d896831594 // indirect

go.sum

@@ -1,7 +1,5 @@
-github.com/emersion/go-message v0.17.0 h1:NIdSKHiVUx4qKqdd0HyJFD41cW8iFguM2XJnRZWQH04=
-github.com/emersion/go-message v0.17.0/go.mod h1:/9Bazlb1jwUNB0npYYBsdJ2EMOiiyN3m5UVHbY7GoNw=
-github.com/emersion/go-textwrapper v0.0.0-20200911093747-65d896831594 h1:IbFBtwoTQyw0fIM5xv1HF+Y+3ZijDR839WMulgxCcUY=
-github.com/emersion/go-textwrapper v0.0.0-20200911093747-65d896831594/go.mod h1:aqO8z8wPrjkscevZJFVE1wXJrLpC5LtJG7fqLOsPb2U=
+github.com/emersion/go-message v0.18.1 h1:tfTxIoXFSFRwWaZsgnqS1DSZuGpYGzSmCZD8SK3QA2E=
+github.com/emersion/go-message v0.18.1/go.mod h1:XpJyL70LwRvq2a8rVbHXikPgKj8+aI0kGdHlg16ibYA=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
@@ -11,8 +9,8 @@ golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLL
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
 golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
-golang.org/x/net v0.23.0 h1:7EYJ93RZ9vYSZAIb2x3lnuvqO5zneoD6IvWjuhfxjTs=
-golang.org/x/net v0.23.0/go.mod h1:JKghWKKOSdJwpW2GEx0Ja7fmaKnMsbu+MWVZTokSYmg=
+golang.org/x/net v0.34.0 h1:Mb7Mrk043xzHgnRM88suvJFwzVrRfHEHJEl5/71CKw0=
+golang.org/x/net v0.34.0/go.mod h1:di0qlW3YNM5oh6GqDGQr92MyTozJPmybPK4Ev/Gm31k=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -29,9 +27,9 @@ golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
-golang.org/x/text v0.12.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
-golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
+golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=

integration/go.mod

@@ -1,19 +1,18 @@
 module github.com/d--j/go-milter/integration
 
-go 1.18
+go 1.22.0
+
+toolchain go1.23.4
 
 require (
 	github.com/d--j/go-milter v0.8.4
-	github.com/emersion/go-message v0.17.0
-	github.com/emersion/go-sasl v0.0.0-20231106173351-e73c9f7bad43
-	github.com/emersion/go-smtp v0.20.0
-	golang.org/x/text v0.14.0
-	golang.org/x/tools v0.16.1
+	github.com/emersion/go-message v0.18.1
+	github.com/emersion/go-sasl v0.0.0-20241020182733-b788ff22d5a6
+	github.com/emersion/go-smtp v0.21.3
+	golang.org/x/text v0.21.0
+	golang.org/x/tools v0.29.0
 )
 
-require (
-	github.com/emersion/go-textwrapper v0.0.0-20200911093747-65d896831594 // indirect
-	golang.org/x/net v0.23.0 // indirect
-)
+require golang.org/x/net v0.34.0 // indirect
 
 replace github.com/d--j/go-milter => ../

integration/go.sum

@@ -1,27 +1,28 @@
-github.com/emersion/go-message v0.17.0 h1:NIdSKHiVUx4qKqdd0HyJFD41cW8iFguM2XJnRZWQH04=
-github.com/emersion/go-message v0.17.0/go.mod h1:/9Bazlb1jwUNB0npYYBsdJ2EMOiiyN3m5UVHbY7GoNw=
+github.com/emersion/go-message v0.18.1 h1:tfTxIoXFSFRwWaZsgnqS1DSZuGpYGzSmCZD8SK3QA2E=
+github.com/emersion/go-message v0.18.1/go.mod h1:XpJyL70LwRvq2a8rVbHXikPgKj8+aI0kGdHlg16ibYA=
 github.com/emersion/go-sasl v0.0.0-20200509203442-7bfe0ed36a21/go.mod h1:iL2twTeMvZnrg54ZoPDNfJaJaqy0xIQFuBdrLsmspwQ=
-github.com/emersion/go-sasl v0.0.0-20231106173351-e73c9f7bad43 h1:hH4PQfOndHDlpzYfLAAfl63E8Le6F2+EL/cdhlkyRJY=
-github.com/emersion/go-sasl v0.0.0-20231106173351-e73c9f7bad43/go.mod h1:iL2twTeMvZnrg54ZoPDNfJaJaqy0xIQFuBdrLsmspwQ=
-github.com/emersion/go-smtp v0.20.0 h1:eTD2iPzYKRrFF+NDHPwKgsBt5ZmB2jO6P2rP2LlVYWI=
-github.com/emersion/go-smtp v0.20.0/go.mod h1:qm27SGYgoIPRot6ubfQ/GpiPy/g3PaZAVRxiO/sDUgQ=
-github.com/emersion/go-textwrapper v0.0.0-20200911093747-65d896831594 h1:IbFBtwoTQyw0fIM5xv1HF+Y+3ZijDR839WMulgxCcUY=
-github.com/emersion/go-textwrapper v0.0.0-20200911093747-65d896831594/go.mod h1:aqO8z8wPrjkscevZJFVE1wXJrLpC5LtJG7fqLOsPb2U=
+github.com/emersion/go-sasl v0.0.0-20241020182733-b788ff22d5a6 h1:oP4q0fw+fOSWn3DfFi4EXdT+B+gTtzx8GC9xsc26Znk=
+github.com/emersion/go-sasl v0.0.0-20241020182733-b788ff22d5a6/go.mod h1:iL2twTeMvZnrg54ZoPDNfJaJaqy0xIQFuBdrLsmspwQ=
+github.com/emersion/go-smtp v0.21.3 h1:7uVwagE8iPYE48WhNsng3RRpCUpFvNl39JGNSIyGVMY=
+github.com/emersion/go-smtp v0.21.3/go.mod h1:qm27SGYgoIPRot6ubfQ/GpiPy/g3PaZAVRxiO/sDUgQ=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
 golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
-golang.org/x/mod v0.14.0 h1:dGoOF9QVLYng8IHTm7BAyWqCqSheQ5pYWGhzW00YJr0=
+golang.org/x/mod v0.22.0 h1:D4nJWe9zXqHOmWqj4VMOJhvzj7bEZg4wEYa759z1pH4=
+golang.org/x/mod v0.22.0/go.mod h1:6SkKJ3Xj0I0BrPOZoBy3bdMptDDU9oJrpohJ3eWZ1fY=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
 golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
-golang.org/x/net v0.23.0 h1:7EYJ93RZ9vYSZAIb2x3lnuvqO5zneoD6IvWjuhfxjTs=
-golang.org/x/net v0.23.0/go.mod h1:JKghWKKOSdJwpW2GEx0Ja7fmaKnMsbu+MWVZTokSYmg=
+golang.org/x/net v0.34.0 h1:Mb7Mrk043xzHgnRM88suvJFwzVrRfHEHJEl5/71CKw0=
+golang.org/x/net v0.34.0/go.mod h1:di0qlW3YNM5oh6GqDGQr92MyTozJPmybPK4Ev/Gm31k=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.10.0 h1:3NQrjDixjgGwUOCaF8w2+VYHv0Ve/vGYSbdkTa98gmQ=
+golang.org/x/sync v0.10.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@@ -35,13 +36,13 @@ golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
-golang.org/x/text v0.12.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
-golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
+golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
 golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
-golang.org/x/tools v0.16.1 h1:TLyB3WofjdOEepBHAU20JdNC1Zbg87elYofWYAY5oZA=
-golang.org/x/tools v0.16.1/go.mod h1:kYVVN6I1mBNoB1OX+noeBjbRk4IUEPa7JJ+TJMEooJ0=
+golang.org/x/tools v0.29.0 h1:Xx0h3TtM9rzQpQuR4dKLrdglAmCEN5Oi+P74JdhdzXE=
+golang.org/x/tools v0.29.0/go.mod h1:KMQVMRsVxU6nHCFXrBPhDB8XncLNLM0lIy/F14RP588=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

integration/mta/mock/mta.go

@@ -10,12 +10,13 @@ import (
 	"log"
 	"math/rand"
 	"net"
-	textproto2 "net/textproto"
+	"net/textproto"
 	"strconv"
 	"strings"
 	"time"
 
 	"github.com/d--j/go-milter"
+	"github.com/emersion/go-sasl"
 	"github.com/emersion/go-smtp"
 )
 
@@ -128,21 +129,27 @@ type Session struct {
 	QuarantineReason       *string
 }
 
-func (s *Session) AuthPlain(username, password string) error {
-	found := false
-	if username == "user1@example.com" && password == "password1" {
-		found = true
-	}
-	if username == "user2@example.com" && password == "password2" {
-		found = true
-	}
-	if found {
-		s.macros.Set(milter.MacroAuthType, "plain")
-		s.macros.Set(milter.MacroAuthAuthen, username)
-		log.Printf("[%s] Authenticated as: %s", s.queueId, username)
-		return nil
-	}
-	return errors.New("invalid username or password")
+func (s *Session) AuthMechanisms() []string {
+	return []string{sasl.Plain}
+}
+
+func (s *Session) Auth(_ string) (sasl.Server, error) {
+	return sasl.NewPlainServer(func(identity, username, password string) error {
+		found := false
+		if username == "user1@example.com" && password == "password1" {
+			found = true
+		}
+		if username == "user2@example.com" && password == "password2" {
+			found = true
+		}
+		if found {
+			s.macros.Set(milter.MacroAuthType, "plain")
+			s.macros.Set(milter.MacroAuthAuthen, username)
+			log.Printf("[%s] Authenticated as: %s", s.queueId, username)
+			return nil
+		}
+		return errors.New("invalid username or password")
+	}), nil
 }
 
 func (s *Session) handleMilter(resp *milter.Action, err error) error {
@@ -247,7 +254,7 @@ func (s *Session) Mail(from string, opts *smtp.MailOptions) error {
 	return s.handleMilter(s.filter.Mail(s.MailFrom, s.MailFromArgs))
 }
 
-func (s *Session) Rcpt(to string, opts *smtp.RcptOptions) error {
+func (s *Session) Rcpt(to string, _ *smtp.RcptOptions) error {
 	log.Printf("[%s] Rcpt to: %s", s.queueId, to)
 	if s.discarded {
 		return nil
@@ -350,7 +357,7 @@ func (s *Session) Data(r io.Reader) error {
 			}
 			raw := fmt.Sprintf("%s:%s%s\r\n", act.HeaderName, maybeSpace, act.HeaderValue)
 			headers = append(headers, &field{
-				key:       textproto2.CanonicalMIMEHeaderKey(act.HeaderName),
+				key:       textproto.CanonicalMIMEHeaderKey(act.HeaderName),
 				changeIdx: -1,
 				raw:       []byte(raw),
 			})
@@ -362,7 +369,7 @@ func (s *Session) Data(r io.Reader) error {
 			}
 			raw := fmt.Sprintf("%s:%s%s\r\n", act.HeaderName, maybeSpace, act.HeaderValue)
 			f := &field{
-				key:       textproto2.CanonicalMIMEHeaderKey(act.HeaderName),
+				key:       textproto.CanonicalMIMEHeaderKey(act.HeaderName),
 				changeIdx: -1,
 				raw:       []byte(raw),
 			}
@@ -383,7 +390,7 @@ func (s *Session) Data(r io.Reader) error {
 				maybeSpace = " "
 			}
 			raw := fmt.Sprintf("%s:%s%s\r\n", act.HeaderName, maybeSpace, act.HeaderValue)
-			key := textproto2.CanonicalMIMEHeaderKey(act.HeaderName)
+			key := textproto.CanonicalMIMEHeaderKey(act.HeaderName)
 			for _, f := range headers {
 				if f.key == key && f.changeIdx == int(act.HeaderIndex) {
 					if act.HeaderValue == "" {
@@ -470,7 +477,7 @@ func splitHeaders(headerBytes []byte) (fields []*field) {
 					log.Print(s)
 					panic("key not found")
 				}
-				key := textproto2.CanonicalMIMEHeaderKey(strings.TrimSpace(s[0][:keyIdx]))
+				key := textproto.CanonicalMIMEHeaderKey(strings.TrimSpace(s[0][:keyIdx]))
 				keyCounter[key] += 1
 				fields = append(fields, &field{
 					key:       key,

integration/runner/config.go

@@ -52,9 +52,9 @@ func ParseConfig() *Config {
 	mtaFilter := ""
 	flag.StringVar(&mtaFilter, "mtaFilter", "", "regexp `pattern` to filter MTAs")
 	flag.Usage = func() {
-		fmt.Fprintf(flag.CommandLine.Output(), "Usage of %s:\n", os.Args[0])
+		_, _ = fmt.Fprintf(flag.CommandLine.Output(), "Usage of %s:\n", os.Args[0])
 		flag.PrintDefaults()
-		fmt.Fprintf(flag.CommandLine.Output(), "  test-dir...\n    \tone ore more directories containing test filters and testcases\n")
+		_, _ = fmt.Fprintf(flag.CommandLine.Output(), "  test-dir...\n    \tone ore more directories containing test filters and testcases\n")
 	}
 	flag.Parse()
 	if filter == "" {
@@ -228,7 +228,8 @@ func expandTestDirs(in []string) (dirs []string, err error) {
 		}
 		pkg, err := ctxt.ImportDir(candidate, 0)
 		if err != nil {
-			if _, ok := err.(*build.NoGoError); ok {
+			var noGoError *build.NoGoError
+			if errors.As(err, &noGoError) {
 				err = filepath.WalkDir(candidate, func(path string, d fs.DirEntry, err error) error {
 					if err == nil && candidate != path && d.IsDir() {
 						in = append(in, path)
@@ -241,8 +242,6 @@ func expandTestDirs(in []string) (dirs []string, err error) {
 				if err != nil {
 					return nil, err
 				}
-			} else {
-				return nil, err
 			}
 		} else {
 			if !pkg.IsCommand() {

integration/runner/exec.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"log"
 	"net"
@@ -31,7 +32,7 @@ func WaitForPort(ctx context.Context, port uint16) error {
 		time.Sleep(250 * time.Millisecond)
 		conn, err := net.Dial("tcp", fmt.Sprintf(":%d", port))
 		if err == nil {
-			conn.Close()
+			_ = conn.Close()
 			return nil
 		}
 	}
@@ -42,7 +43,8 @@ func IsExpectedExitErr(err error) bool {
 	if err == nil {
 		return true
 	}
-	if e, ok := err.(*exec.ExitError); ok {
+	var e *exec.ExitError
+	if errors.As(err, &e) {
 		if e.Success() || e.ExitCode() == integration.ExitSkip {
 			return true
 		}

integration/runner/mta.go

@@ -82,6 +82,7 @@ func (m *MTA) Start() error {
 			if err != nil {
 				return err
 			}
+			//goland:noinspection GoDeferInLoop
 			defer func(d time.Duration) { time.Sleep(d) }(d)
 			break
 		}

integration/runner/receiver.go

@@ -12,6 +12,7 @@ import (
 	"time"
 
 	"github.com/d--j/go-milter/integration"
+	"github.com/emersion/go-sasl"
 	"github.com/emersion/go-smtp"
 )
 
@@ -41,8 +42,12 @@ func (rs *ReceiverSession) Logout() error {
 	return nil
 }
 
-func (rs *ReceiverSession) AuthPlain(_, _ string) error {
-	return errors.New("no auth")
+func (rs *ReceiverSession) AuthMechanisms() []string {
+	return []string{}
+}
+
+func (rs *ReceiverSession) Auth(_ string) (sasl.Server, error) {
+	return nil, errors.New("no auth")
 }
 
 func (rs *ReceiverSession) Mail(from string, opts *smtp.MailOptions) error {