update to golang.org/x/mod@latest

go.mod

@@ -29,7 +29,7 @@ require (
 	github.com/prometheus/client_model v0.5.0 // indirect
 	github.com/prometheus/common v0.45.0 // indirect
 	github.com/prometheus/procfs v0.12.0 // indirect
-	golang.org/x/mod v0.17.0 // indirect
+	golang.org/x/mod v0.20.0 // indirect
 	golang.org/x/sync v0.7.0 // indirect
 	golang.org/x/sys v0.24.0 // indirect
 	golang.org/x/tools v0.20.0 // indirect

go.sum

@@ -78,8 +78,8 @@ golang.org/x/crypto v0.22.0/go.mod h1:vr6Su+7cTlO45qkww3VDJlzDn0ctJvRgYbC2NvXHt+
 golang.org/x/exp v0.0.0-20240416160154-fe59bbe5cc7f h1:99ci1mjWVBWwJiEKYY6jWa4d2nTQVIEhZIptnrVb1XY=
 golang.org/x/exp v0.0.0-20240416160154-fe59bbe5cc7f/go.mod h1:/lliqkxwWAhPjf5oSOIJup2XcqJaw8RGS6k3TGEc7GI=
 golang.org/x/mod v0.5.1/go.mod h1:5OXOZSfqPIIbmVBIIKWRFfZjPR0E5r58TLhUjH0a2Ro=
-golang.org/x/mod v0.17.0 h1:zY54UmvipHiNd+pm+m0x9KhZ9hl1/7QNMyxXbc6ICqA=
+golang.org/x/mod v0.20.0 h1:utOm6MM3R3dnawAiJgn0y+xvuYRsm1RKM/4giyfDgV0=
-golang.org/x/mod v0.17.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
+golang.org/x/mod v0.20.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
 golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=

vendor/golang.org/x/mod/LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2009 The Go Authors. All rights reserved.
+Copyright 2009 The Go Authors.
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are
@@ -10,7 +10,7 @@ notice, this list of conditions and the following disclaimer.
 copyright notice, this list of conditions and the following disclaimer
 in the documentation and/or other materials provided with the
 distribution.
-   * Neither the name of Google Inc. nor the names of its
+   * Neither the name of Google LLC nor the names of its
 contributors may be used to endorse or promote products derived from
 this software without specific prior written permission.
 

vendor/golang.org/x/mod/modfile/read.go

@@ -226,8 +226,9 @@ func (x *FileSyntax) Cleanup() {
 				continue
 			}
 			if ww == 1 && len(stmt.RParen.Comments.Before) == 0 {
-				// Collapse block into single line.
+				// Collapse block into single line but keep the Line reference used by the
-				line := &Line{
+				// parsed File structure.
+				*stmt.Line[0] = Line{
 					Comments: Comments{
 						Before: commentsAdd(stmt.Before, stmt.Line[0].Before),
 						Suffix: commentsAdd(stmt.Line[0].Suffix, stmt.Suffix),
@@ -235,7 +236,7 @@ func (x *FileSyntax) Cleanup() {
 					},
 					Token: stringsAdd(stmt.Token, stmt.Line[0].Token),
 				}
-				x.Stmt[w] = line
+				x.Stmt[w] = stmt.Line[0]
 				w++
 				continue
 			}

vendor/golang.org/x/mod/modfile/rule.go

@@ -38,10 +38,12 @@ type File struct {
 	Module    *Module
 	Go        *Go
 	Toolchain *Toolchain
+	Godebug   []*Godebug
 	Require   []*Require
 	Exclude   []*Exclude
 	Replace   []*Replace
 	Retract   []*Retract
+	Tool      []*Tool
 
 	Syntax *FileSyntax
 }
@@ -65,6 +67,13 @@ type Toolchain struct {
 	Syntax *Line
 }
 
+// A Godebug is a single godebug key=value statement.
+type Godebug struct {
+	Key    string
+	Value  string
+	Syntax *Line
+}
+
 // An Exclude is a single exclude statement.
 type Exclude struct {
 	Mod    module.Version
@@ -85,6 +94,12 @@ type Retract struct {
 	Syntax    *Line
 }
 
+// A Tool is a single tool statement.
+type Tool struct {
+	Path   string
+	Syntax *Line
+}
+
 // A VersionInterval represents a range of versions with upper and lower bounds.
 // Intervals are closed: both bounds are included. When Low is equal to High,
 // the interval may refer to a single version ('v1.2.3') or an interval
@@ -289,7 +304,7 @@ func parseToFile(file string, data []byte, fix VersionFixer, strict bool) (parse
 					})
 				}
 				continue
-			case "module", "require", "exclude", "replace", "retract":
+			case "module", "godebug", "require", "exclude", "replace", "retract", "tool":
 				for _, l := range x.Line {
 					f.add(&errs, x, l, x.Token[0], l.Token, fix, strict)
 				}
@@ -308,7 +323,9 @@ var laxGoVersionRE = lazyregexp.New(`^v?(([1-9][0-9]*)\.(0|[1-9][0-9]*))([^0-9].
 
 // Toolchains must be named beginning with `go1`,
 // like "go1.20.3" or "go1.20.3-gccgo". As a special case, "default" is also permitted.
-// TODO(samthanawalla): Replace regex with https://pkg.go.dev/go/version#IsValid in 1.23+
+// Note that this regexp is a much looser condition than go/version.IsValid,
+// for forward compatibility.
+// (This code has to be work to identify new toolchains even if we tweak the syntax in the future.)
 var ToolchainRE = lazyregexp.New(`^default$|^go1($|\.)`)
 
 func (f *File) add(errs *ErrorList, block *LineBlock, line *Line, verb string, args []string, fix VersionFixer, strict bool) {
@@ -384,7 +401,7 @@ func (f *File) add(errs *ErrorList, block *LineBlock, line *Line, verb string, a
 		if len(args) != 1 {
 			errorf("toolchain directive expects exactly one argument")
 			return
-		} else if strict && !ToolchainRE.MatchString(args[0]) {
+		} else if !ToolchainRE.MatchString(args[0]) {
 			errorf("invalid toolchain version '%s': must match format go1.23.0 or default", args[0])
 			return
 		}
@@ -412,6 +429,22 @@ func (f *File) add(errs *ErrorList, block *LineBlock, line *Line, verb string, a
 		}
 		f.Module.Mod = module.Version{Path: s}
 
+	case "godebug":
+		if len(args) != 1 || strings.ContainsAny(args[0], "\"`',") {
+			errorf("usage: godebug key=value")
+			return
+		}
+		key, value, ok := strings.Cut(args[0], "=")
+		if !ok {
+			errorf("usage: godebug key=value")
+			return
+		}
+		f.Godebug = append(f.Godebug, &Godebug{
+			Key:    key,
+			Value:  value,
+			Syntax: line,
+		})
+
 	case "require", "exclude":
 		if len(args) != 2 {
 			errorf("usage: %s module/path v1.2.3", verb)
@@ -483,6 +516,21 @@ func (f *File) add(errs *ErrorList, block *LineBlock, line *Line, verb string, a
 			Syntax:          line,
 		}
 		f.Retract = append(f.Retract, retract)
+
+	case "tool":
+		if len(args) != 1 {
+			errorf("tool directive expects exactly one argument")
+			return
+		}
+		s, err := parseString(&args[0])
+		if err != nil {
+			errorf("invalid quoted string: %v", err)
+			return
+		}
+		f.Tool = append(f.Tool, &Tool{
+			Path:   s,
+			Syntax: line,
+		})
 	}
 }
 
@@ -654,6 +702,22 @@ func (f *WorkFile) add(errs *ErrorList, line *Line, verb string, args []string,
 		f.Toolchain = &Toolchain{Syntax: line}
 		f.Toolchain.Name = args[0]
 
+	case "godebug":
+		if len(args) != 1 || strings.ContainsAny(args[0], "\"`',") {
+			errorf("usage: godebug key=value")
+			return
+		}
+		key, value, ok := strings.Cut(args[0], "=")
+		if !ok {
+			errorf("usage: godebug key=value")
+			return
+		}
+		f.Godebug = append(f.Godebug, &Godebug{
+			Key:    key,
+			Value:  value,
+			Syntax: line,
+		})
+
 	case "use":
 		if len(args) != 1 {
 			errorf("usage: %s local/dir", verb)
@@ -929,6 +993,15 @@ func (f *File) Format() ([]byte, error) {
 // Cleanup cleans out all the cleared entries.
 func (f *File) Cleanup() {
 	w := 0
+	for _, g := range f.Godebug {
+		if g.Key != "" {
+			f.Godebug[w] = g
+			w++
+		}
+	}
+	f.Godebug = f.Godebug[:w]
+
+	w = 0
 	for _, r := range f.Require {
 		if r.Mod.Path != "" {
 			f.Require[w] = r
@@ -1027,6 +1100,45 @@ func (f *File) AddToolchainStmt(name string) error {
 	return nil
 }
 
+// AddGodebug sets the first godebug line for key to value,
+// preserving any existing comments for that line and removing all
+// other godebug lines for key.
+//
+// If no line currently exists for key, AddGodebug adds a new line
+// at the end of the last godebug block.
+func (f *File) AddGodebug(key, value string) error {
+	need := true
+	for _, g := range f.Godebug {
+		if g.Key == key {
+			if need {
+				g.Value = value
+				f.Syntax.updateLine(g.Syntax, "godebug", key+"="+value)
+				need = false
+			} else {
+				g.Syntax.markRemoved()
+				*g = Godebug{}
+			}
+		}
+	}
+
+	if need {
+		f.addNewGodebug(key, value)
+	}
+	return nil
+}
+
+// addNewGodebug adds a new godebug key=value line at the end
+// of the last godebug block, regardless of any existing godebug lines for key.
+func (f *File) addNewGodebug(key, value string) {
+	line := f.Syntax.addLine(nil, "godebug", key+"="+value)
+	g := &Godebug{
+		Key:    key,
+		Value:  value,
+		Syntax: line,
+	}
+	f.Godebug = append(f.Godebug, g)
+}
+
 // AddRequire sets the first require line for path to version vers,
 // preserving any existing comments for that line and removing all
 // other lines for path.
@@ -1334,6 +1446,16 @@ func (f *File) SetRequireSeparateIndirect(req []*Require) {
 	f.SortBlocks()
 }
 
+func (f *File) DropGodebug(key string) error {
+	for _, g := range f.Godebug {
+		if g.Key == key {
+			g.Syntax.markRemoved()
+			*g = Godebug{}
+		}
+	}
+	return nil
+}
+
 func (f *File) DropRequire(path string) error {
 	for _, r := range f.Require {
 		if r.Mod.Path == path {
@@ -1467,6 +1589,36 @@ func (f *File) DropRetract(vi VersionInterval) error {
 	return nil
 }
 
+// AddTool adds a new tool directive with the given path.
+// It does nothing if the tool line already exists.
+func (f *File) AddTool(path string) error {
+	for _, t := range f.Tool {
+		if t.Path == path {
+			return nil
+		}
+	}
+
+	f.Tool = append(f.Tool, &Tool{
+		Path:   path,
+		Syntax: f.Syntax.addLine(nil, "tool", path),
+	})
+
+	f.SortBlocks()
+	return nil
+}
+
+// RemoveTool removes a tool directive with the given path.
+// It does nothing if no such tool directive exists.
+func (f *File) DropTool(path string) error {
+	for _, t := range f.Tool {
+		if t.Path == path {
+			t.Syntax.markRemoved()
+			*t = Tool{}
+		}
+	}
+	return nil
+}
+
 func (f *File) SortBlocks() {
 	f.removeDups() // otherwise sorting is unsafe
 
@@ -1493,9 +1645,9 @@ func (f *File) SortBlocks() {
 	}
 }
 
-// removeDups removes duplicate exclude and replace directives.
+// removeDups removes duplicate exclude, replace and tool directives.
 //
-// Earlier exclude directives take priority.
+// Earlier exclude and tool directives take priority.
 //
 // Later replace directives take priority.
 //
@@ -1505,10 +1657,10 @@ func (f *File) SortBlocks() {
 // retract directives are not de-duplicated since comments are
 // meaningful, and versions may be retracted multiple times.
 func (f *File) removeDups() {
-	removeDups(f.Syntax, &f.Exclude, &f.Replace)
+	removeDups(f.Syntax, &f.Exclude, &f.Replace, &f.Tool)
 }
 
-func removeDups(syntax *FileSyntax, exclude *[]*Exclude, replace *[]*Replace) {
+func removeDups(syntax *FileSyntax, exclude *[]*Exclude, replace *[]*Replace, tool *[]*Tool) {
 	kill := make(map[*Line]bool)
 
 	// Remove duplicate excludes.
@@ -1549,6 +1701,24 @@ func removeDups(syntax *FileSyntax, exclude *[]*Exclude, replace *[]*Replace) {
 	}
 	*replace = repl
 
+	if tool != nil {
+		haveTool := make(map[string]bool)
+		for _, t := range *tool {
+			if haveTool[t.Path] {
+				kill[t.Syntax] = true
+				continue
+			}
+			haveTool[t.Path] = true
+		}
+		var newTool []*Tool
+		for _, t := range *tool {
+			if !kill[t.Syntax] {
+				newTool = append(newTool, t)
+			}
+		}
+		*tool = newTool
+	}
+
 	// Duplicate require and retract directives are not removed.
 
 	// Drop killed statements from the syntax tree.

vendor/golang.org/x/mod/modfile/work.go

@@ -14,6 +14,7 @@ import (
 type WorkFile struct {
 	Go        *Go
 	Toolchain *Toolchain
+	Godebug   []*Godebug
 	Use       []*Use
 	Replace   []*Replace
 
@@ -68,7 +69,7 @@ func ParseWork(file string, data []byte, fix VersionFixer) (*WorkFile, error) {
 					Err:      fmt.Errorf("unknown block type: %s", strings.Join(x.Token, " ")),
 				})
 				continue
-			case "use", "replace":
+			case "godebug", "use", "replace":
 				for _, l := range x.Line {
 					f.add(&errs, l, x.Token[0], l.Token, fix)
 				}
@@ -184,6 +185,55 @@ func (f *WorkFile) DropToolchainStmt() {
 	}
 }
 
+// AddGodebug sets the first godebug line for key to value,
+// preserving any existing comments for that line and removing all
+// other godebug lines for key.
+//
+// If no line currently exists for key, AddGodebug adds a new line
+// at the end of the last godebug block.
+func (f *WorkFile) AddGodebug(key, value string) error {
+	need := true
+	for _, g := range f.Godebug {
+		if g.Key == key {
+			if need {
+				g.Value = value
+				f.Syntax.updateLine(g.Syntax, "godebug", key+"="+value)
+				need = false
+			} else {
+				g.Syntax.markRemoved()
+				*g = Godebug{}
+			}
+		}
+	}
+
+	if need {
+		f.addNewGodebug(key, value)
+	}
+	return nil
+}
+
+// addNewGodebug adds a new godebug key=value line at the end
+// of the last godebug block, regardless of any existing godebug lines for key.
+func (f *WorkFile) addNewGodebug(key, value string) {
+	line := f.Syntax.addLine(nil, "godebug", key+"="+value)
+	g := &Godebug{
+		Key:    key,
+		Value:  value,
+		Syntax: line,
+	}
+	f.Godebug = append(f.Godebug, g)
+}
+
+func (f *WorkFile) DropGodebug(key string) error {
+	for _, g := range f.Godebug {
+		if g.Key == key {
+			g.Syntax.markRemoved()
+			*g = Godebug{}
+		}
+	}
+	return nil
+}
+
 func (f *WorkFile) AddUse(diskPath, modulePath string) error {
 	need := true
 	for _, d := range f.Use {
@@ -281,5 +331,5 @@ func (f *WorkFile) SortBlocks() {
 // retract directives are not de-duplicated since comments are
 // meaningful, and versions may be retracted multiple times.
 func (f *WorkFile) removeDups() {
-	removeDups(f.Syntax, nil, &f.Replace)
+	removeDups(f.Syntax, nil, &f.Replace, nil)
 }

vendor/modules.txt

@@ -74,7 +74,7 @@ golang.org/x/crypto/pbkdf2
 # golang.org/x/exp v0.0.0-20240416160154-fe59bbe5cc7f
 ## explicit; go 1.20
 golang.org/x/exp/maps
-# golang.org/x/mod v0.17.0
+# golang.org/x/mod v0.20.0
 ## explicit; go 1.18
 golang.org/x/mod/internal/lazyregexp
 golang.org/x/mod/modfile