Slimfast: get rid of multierror dep

go.mod

@@ -5,7 +5,4 @@ go 1.21.4
 require (
 	git.tcp.direct/kayos/common v0.9.6
 	github.com/davecgh/go-spew v1.1.1
-	github.com/hashicorp/go-multierror v1.1.1
 )
-
-require github.com/hashicorp/errwrap v1.0.0 // indirect

go.sum

@@ -2,7 +2,3 @@ git.tcp.direct/kayos/common v0.9.6 h1:EITtktxZF/zkzqAhZZxvm6cZpFYoZ0P/gLB9RPatKU
 git.tcp.direct/kayos/common v0.9.6/go.mod h1:8y9b+PN1+ZVaQ/VugD9dkKe+uqhE8jH7a64RyF7h2rM=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/hashicorp/errwrap v1.0.0 h1:hLrqtEDnRye3+sgx6z4qVLNuviH3MR5aQ0ykNJa/UYA=
-github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
-github.com/hashicorp/go-multierror v1.1.1 h1:H5DkEtf6CXdFp0N0Em5UCwQpXMWke8IA0+lD48awMYo=
-github.com/hashicorp/go-multierror v1.1.1/go.mod h1:iw975J/qwKPdAO1clOe2L8331t/9/fmwbPZ6JB6eMoM=

ifaces.go

@@ -2,9 +2,9 @@ package iface
 
 import (
 	"bufio"
+	"fmt"
 	"strings"
-
-	"github.com/hashicorp/go-multierror"
+	"sync"
 
 	"git.tcp.direct/kayos/common/pool"
 )
@@ -92,11 +92,16 @@ func (p *MultiParser) Parse() error {
 	if len(buf.Bytes()) > 0 {
 		flush("unknown")
 	}
-	me := &multierror.Error{}
+	var multiErr error
 	for _, err := range p.Errs {
-		if err != nil {
-			me = multierror.Append(me, err)
+		switch {
+		case err == nil:
+			continue
+		case multiErr == nil:
+			multiErr = err
+		default:
+			multiErr = fmt.Errorf("%w, %w", multiErr, err)
 		}
 	}
-	return me.ErrorOrNil()
+	return p.Interfaces, multiErr
 }