update to latest sconf, which now gives more helpful error messages about some invalid config lines, like one with only whitespace

from arnt & friend, thanks for reporting!

go.mod

@@ -6,7 +6,7 @@ require (
 	github.com/mjl-/adns v0.0.0-20240309142737-2a1aacf346dc
 	github.com/mjl-/autocert v0.0.0-20231214125928-31b7400acb05
 	github.com/mjl-/bstore v0.0.4
-	github.com/mjl-/sconf v0.0.5
+	github.com/mjl-/sconf v0.0.6
 	github.com/mjl-/sherpa v0.6.7
 	github.com/mjl-/sherpadoc v0.0.12
 	github.com/mjl-/sherpaprom v0.0.2

go.sum

@@ -30,8 +30,8 @@ github.com/mjl-/autocert v0.0.0-20231214125928-31b7400acb05 h1:s6ay4bh4tmpPLdxjy
 github.com/mjl-/autocert v0.0.0-20231214125928-31b7400acb05/go.mod h1:taMFU86abMxKLPV4Bynhv8enbYmS67b8LG80qZv2Qus=
 github.com/mjl-/bstore v0.0.4 h1:q+R1oAr8+E9yf9q+zxkVjQ18VFqD/E9KmGVoe4FIOBA=
 github.com/mjl-/bstore v0.0.4/go.mod h1:/cD25FNBaDfvL/plFRxI3Ba3E+wcB0XVOS8nJDqndg0=
-github.com/mjl-/sconf v0.0.5 h1:4CMUTENpSnaeP2g6RKtrs8udTxnJgjX2MCCovxGId6s=
+github.com/mjl-/sconf v0.0.6 h1:5Dt58488ZOoVx680zgK2K3vUrokLsp5mXDUACrJlrUc=
-github.com/mjl-/sconf v0.0.5/go.mod h1:uF8OdWtLT8La3i4ln176i1pB0ps9pXGCaABEU55ZkE0=
+github.com/mjl-/sconf v0.0.6/go.mod h1:uF8OdWtLT8La3i4ln176i1pB0ps9pXGCaABEU55ZkE0=
 github.com/mjl-/sherpa v0.6.7 h1:C5F8XQdV5nCuS4fvB+ye/ziUQrajEhOoj/t2w5T14BY=
 github.com/mjl-/sherpa v0.6.7/go.mod h1:dSpAOdgpwdqQZ72O4n3EHo/tR68eKyan8tYYraUMPNc=
 github.com/mjl-/sherpadoc v0.0.0-20190505200843-c0a7f43f5f1d/go.mod h1:5khTKxoKKNXcB8bkVUO6GlzC7PFtMmkHq578lPbmnok=

vendor/github.com/mjl-/sconf/parse.go

@@ -218,11 +218,15 @@ func (p *parser) parseStruct0(v reflect.Value) {
 	var zeroValue reflect.Value
 	t := v.Type()
 	for p.next() {
-		s := p.string()
+		origs := p.string()
-		s = s[len(p.prefix):]
+		s := origs[len(p.prefix):]
 		l := strings.SplitN(s, ":", 2)
 		if len(l) != 2 {
-			p.stop("missing key: value")
+			var more string
+			if strings.TrimSpace(s) == "" {
+				more = " (perhaps stray whitespace)"
+			}
+			p.stop(fmt.Sprintf("missing colon for key/value on non-empty line %q%s", origs, more))
 		}
 		k := l[0]
 		if k == "" {
@@ -234,7 +238,7 @@ func (p *parser) parseStruct0(v reflect.Value) {
 		seen[k] = struct{}{}
 		s = l[1]
 		if s != "" && !strings.HasPrefix(s, " ") {
-			p.stop("no space after colon")
+			p.stop("missing space after colon")
 		}
 		if s != "" {
 			s = s[1:]
@@ -243,7 +247,11 @@ func (p *parser) parseStruct0(v reflect.Value) {
 
 		vv := v.FieldByName(k)
 		if vv == zeroValue {
-			p.stop(fmt.Sprintf("unknown key %q", k))
+			var more string
+			if strings.TrimSpace(k) != k {
+				more = " (perhaps stray whitespace in key)"
+			}
+			p.stop(fmt.Sprintf("unknown key %q%s", k, more))
 		}
 		if ft, _ := t.FieldByName(k); !ft.IsExported() || isIgnore(ft.Tag.Get("sconf")) {
 			p.stop(fmt.Sprintf("unknown key %q (has ignore tag or not exported)", k))
@@ -273,11 +281,15 @@ func (p *parser) parseMap0(v reflect.Value) {
 	seen := map[string]struct{}{}
 	t := v.Type()
 	for p.next() {
-		s := p.string()
+		origs := p.string()
-		s = s[len(p.prefix):]
+		s := origs[len(p.prefix):]
 		l := strings.SplitN(s, ":", 2)
 		if len(l) != 2 {
-			p.stop("missing key: value")
+			var more string
+			if strings.TrimSpace(s) == "" {
+				more = " (perhaps stray whitespace)"
+			}
+			p.stop(fmt.Sprintf("missing colon for key/value on non-empty line %q%s", origs, more))
 		}
 		k := l[0]
 		if k == "" {
@@ -289,7 +301,7 @@ func (p *parser) parseMap0(v reflect.Value) {
 		seen[k] = struct{}{}
 		s = l[1]
 		if s != "" && !strings.HasPrefix(s, " ") {
-			p.stop("no space after colon")
+			p.stop("missing space after colon")
 		}
 		if s != "" {
 			s = s[1:]

vendor/modules.txt

@@ -19,7 +19,7 @@ github.com/mjl-/autocert
 # github.com/mjl-/bstore v0.0.4
 ## explicit; go 1.19
 github.com/mjl-/bstore
-# github.com/mjl-/sconf v0.0.5
+# github.com/mjl-/sconf v0.0.6
 ## explicit; go 1.12
 github.com/mjl-/sconf
 # github.com/mjl-/sherpa v0.6.7