go: update module, various cleanup

.github/workflows/go.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v3
         with:
-          go-version: "1.20"
+          go-version: "1.21"
 
       - name: Build
         run: go build -v ./...

.github/workflows/pre-commit.yml

@@ -10,5 +10,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
+      - name: Set up Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: "1.21"
       - uses: actions/setup-python@v3
       - uses: pre-commit/action@v3.0.0

cmd/cmd.go

@@ -20,13 +20,13 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"slices"
 	"strconv"
 	"strings"
 
 	"github.com/google/keep-sorted/keepsorted"
 	flag "github.com/spf13/pflag"
 	"golang.org/x/exp/maps"
-	"golang.org/x/exp/slices"
 )
 
 type Config struct {
@@ -41,7 +41,9 @@ func (c *Config) FromFlags(fs *flag.FlagSet) {
 	}
 
 	fs.StringVar(&c.id, "id", "keep-sorted", "The identifier used to enable this tool in files.")
-	fs.MarkHidden("id")
+	if err := fs.MarkHidden("id"); err != nil {
+		panic(err)
+	}
 
 	of := &operationFlag{op: &c.operation}
 	if err := of.Set("fix"); err != nil {
@@ -147,7 +149,7 @@ func (f *lineRangeFlag) parse(vals []string) ([]keepsorted.LineRange, error) {
 		if err != nil {
 			return nil, fmt.Errorf("invalid line range %q: %w", val, err)
 		}
-		end := -1
+		var end int
 		if len(sp) == 1 {
 			end = start
 		} else {
@@ -157,7 +159,7 @@ func (f *lineRangeFlag) parse(vals []string) ([]keepsorted.LineRange, error) {
 			}
 		}
 
-		lrs = append(lrs, keepsorted.LineRange{start, end})
+		lrs = append(lrs, keepsorted.LineRange{Start: start, End: end})
 	}
 	return lrs, nil
 }

go.mod

@@ -1,21 +1,19 @@
 module github.com/google/keep-sorted
 
-go 1.20
+go 1.21
 
 require (
 	github.com/Workiva/go-datastructures v1.0.53
 	github.com/google/go-cmp v0.5.8
-	github.com/mattn/go-isatty v0.0.14
-	github.com/rs/zerolog v1.29.0
+	github.com/mattn/go-isatty v0.0.20
+	github.com/rs/zerolog v1.31.0
 	github.com/spf13/pflag v1.0.5
-	go.uber.org/multierr v1.9.0
-	golang.org/x/exp v0.0.0-20230213192124-5e25df0256eb
+	golang.org/x/exp v0.0.0-20240103183307-be819d1f06fc
 	google.golang.org/protobuf v1.28.1
 )
 
 require (
-	github.com/mattn/go-colorable v0.1.12 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/stretchr/testify v1.8.1 // indirect
-	go.uber.org/atomic v1.7.0 // indirect
-	golang.org/x/sys v0.1.0 // indirect
+	golang.org/x/sys v0.15.0 // indirect
 )

go.sum

@@ -1,6 +1,6 @@
 github.com/Workiva/go-datastructures v1.0.53 h1:J6Y/52yX10Xc5JjXmGtWoSSxs3mZnGSaq37xZZh7Yig=
 github.com/Workiva/go-datastructures v1.0.53/go.mod h1:1yZL+zfsztete+ePzZz/Zb1/t5BnDuE2Ya2MMGhzP6A=
-github.com/coreos/go-systemd/v22 v22.3.3-0.20220203105225-a9a7ef127534/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
+github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 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=
@@ -9,23 +9,24 @@ github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaS
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.8 h1:e6P7q2lk1O+qJJb4BtCQXlK8vWEO8V1ZeuEdJNOqZyg=
 github.com/google/go-cmp v0.5.8/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
-github.com/mattn/go-colorable v0.1.12 h1:jF+Du6AlPIjs2BiUiQlKOX0rt3SujHxPnksPKZbaA40=
-github.com/mattn/go-colorable v0.1.12/go.mod h1:u5H1YNBxpqRaxsYJYSkiCWKzEfiAb1Gb520KVy5xxl4=
-github.com/mattn/go-isatty v0.0.14 h1:yVuAays6BHfxijgZPzw+3Zlu5yQgKGP2/hcQbHb7S9Y=
-github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=
+github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
+github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
+github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
+github.com/mattn/go-isatty v0.0.19/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
+github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/philhofer/fwd v1.1.1/go.mod h1:gk3iGcWd9+svBvR0sR+KPcfE+RNWozjowpeBVG3ZVNU=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/rs/xid v1.4.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
-github.com/rs/zerolog v1.29.0 h1:Zes4hju04hjbvkVkOhdl2HpZa+0PmVwigmo8XoORE5w=
-github.com/rs/zerolog v1.29.0/go.mod h1:NILgTygv/Uej1ra5XxGf82ZFSLk58MFGAUS2o6usyD0=
+github.com/rs/xid v1.5.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
+github.com/rs/zerolog v1.31.0 h1:FcTR3NnLWW+NnTwwhFWiJSZr4ECLpqCm6QsEnyvbV4A=
+github.com/rs/zerolog v1.31.0/go.mod h1:/7mN4D5sKwJLZQ2b/znpjC3/GQWY/xaDXUM0kKWRHss=
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
-github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
@@ -34,15 +35,11 @@ github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o
 github.com/tinylib/msgp v1.1.5/go.mod h1:eQsjooMTnV42mHu917E26IogZ2930nFyBQdofk10Udg=
 github.com/ttacon/chalk v0.0.0-20160626202418-22c06c80ed31/go.mod h1:onvgF043R+lC5RZ8IT9rBXDaEDnpnw/Cl+HFiw+v/7Q=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
-go.uber.org/atomic v1.7.0 h1:ADUqmZGgLDDfbSL9ZmPxKTybcoEYHgpYfELNoN+7hsw=
-go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
-go.uber.org/multierr v1.9.0 h1:7fIwc/ZtS0q++VgcfqFDxSBZVv/Xo49/SYnDFupUwlI=
-go.uber.org/multierr v1.9.0/go.mod h1:X2jQV1h+kxSjClGpnseKVIxpmcjrj7MNnI0bnlfKTVQ=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/exp v0.0.0-20230213192124-5e25df0256eb h1:PaBZQdo+iSDyHT053FjUCgZQ/9uqVwPOcl7KSWhKn6w=
-golang.org/x/exp v0.0.0-20230213192124-5e25df0256eb/go.mod h1:CxIveKay+FTh1D0yPZemJVgC/95VzuuOLq5Qi4xnoYc=
+golang.org/x/exp v0.0.0-20240103183307-be819d1f06fc h1:ao2WRsKSzW6KuUY9IWPwWahcHCgR0s52IfwutMfEbdM=
+golang.org/x/exp v0.0.0-20240103183307-be819d1f06fc/go.mod h1:iRJReGqOEeBhDZGkGbynYwcHlctCvnjTYIamk7uXpHI=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 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=
@@ -52,10 +49,11 @@ golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.1.0 h1:kunALQeHf1/185U1i0GOB/fy1IPRDDpuoOOqRReG57U=
-golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.15.0 h1:h48lPFYpsTvQJZF4EKyI4aLHaev3CxivZmv7yZig9pc=
+golang.org/x/sys v0.15.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 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/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=

goldens/golden_test.go

@@ -15,7 +15,7 @@
 package golden_test
 
 import (
-	"io/ioutil"
+	"io"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -65,7 +65,7 @@ func TestGoldens(t *testing.T) {
 				if err != nil {
 					t.Fatalf("Could not open .out file: %v", err)
 				}
-				want, err := ioutil.ReadAll(out)
+				want, err := io.ReadAll(out)
 				if err != nil {
 					t.Fatalf("Could not read .out file: %v", err)
 				}
@@ -84,13 +84,13 @@ func TestGoldens(t *testing.T) {
 					t.Errorf("could not start keep-sorted: %v", err)
 				}
 
-				if stderr, err := ioutil.ReadAll(stderr); err != nil {
+				if stderr, err := io.ReadAll(stderr); err != nil {
 					t.Errorf("could not read keep-sorted stderr: %v", err)
 				} else if len(stderr) != 0 {
 					t.Errorf("keep-sorted stderr: %s", string(stderr))
 				}
 
-				if got, err := ioutil.ReadAll(stdout); err != nil {
+				if got, err := io.ReadAll(stdout); err != nil {
 					t.Errorf("could not read keep-sorted stdout: %v", err)
 				} else if diff := cmp.Diff(strings.Split(string(want), "\n"), strings.Split(string(got), "\n")); diff != "" {
 					t.Errorf("keep-sorted stdout diff (-want +got):\n%s", diff)

keepsorted/block.go

@@ -15,12 +15,12 @@
 package keepsorted
 
 import (
+	"cmp"
 	"fmt"
+	"slices"
 	"strings"
 
 	"github.com/rs/zerolog/log"
-	"golang.org/x/exp/constraints"
-	"golang.org/x/exp/slices"
 )
 
 type block struct {
@@ -248,7 +248,7 @@ func allHaveSuffix(lgs []lineGroup, s string) bool {
 	return true
 }
 
-func (b block) lessFn() func(a, b lineGroup) bool {
+func (b block) lessFn() func(a, b lineGroup) int {
 	// Always put groups that are only comments last.
 	commentOnlyBlock := comparingProperty(func(lg lineGroup) int {
 		if len(lg.lines) > 0 {
@@ -268,8 +268,8 @@ func (b block) lessFn() func(a, b lineGroup) bool {
 	for i, p := range b.opts.PrefixOrder {
 		prefixWeights = append(prefixWeights, prefixWeight{p, i - len(b.opts.PrefixOrder)})
 	}
-	slices.SortStableFunc(prefixWeights, func(a, b prefixWeight) bool {
-		return len(a.prefix) > len(b.prefix)
+	slices.SortStableFunc(prefixWeights, func(a, b prefixWeight) int {
+		return cmp.Compare(b.prefix, a.prefix)
 	})
 
 	prefixOrder := comparingProperty(func(lg lineGroup) int {
@@ -310,21 +310,21 @@ func (b block) lessFn() func(a, b lineGroup) bool {
 		return b.opts.maybeParseNumeric(l)
 	}, numericTokens.compare)
 
-	return func(a, b lineGroup) bool {
+	return func(a, b lineGroup) int {
 		for _, cmp := range []func(a, b lineGroup) int{
 			commentOnlyBlock,
 			prefixOrder,
 			transformOrder,
 		} {
 			if c := cmp(a, b); c != 0 {
-				return c < 0
+				return c
 			}
 		}
 		return a.less(b)
 	}
 }
 
-func comparingProperty[T any, E constraints.Ordered](f func(T) E) func(a, b T) int {
+func comparingProperty[T any, E cmp.Ordered](f func(T) E) func(a, b T) int {
 	return comparingPropertyWith(f, func(a, b E) int {
 		if a < b {
 			return -1

keepsorted/keep_sorted.go

@@ -15,11 +15,12 @@
 package keepsorted
 
 import (
+	"cmp"
 	"fmt"
+	"slices"
 	"strings"
 
 	"github.com/Workiva/go-datastructures/augmentedtree"
-	"golang.org/x/exp/slices"
 )
 
 const (
@@ -147,8 +148,8 @@ func (f *Fixer) findings(filename string, contents []string, modifiedLines []Lin
 		fs = append(fs, finding(filename, ib.line, ib.line, msg, ""))
 	}
 
-	slices.SortFunc(fs, func(a, b *Finding) bool {
-		return startLine(a) < startLine(b)
+	slices.SortFunc(fs, func(a, b *Finding) int {
+		return cmp.Compare(startLine(a), startLine(b))
 	})
 	return fs
 }

keepsorted/line_group.go

@@ -15,6 +15,7 @@
 package keepsorted
 
 import (
+	"cmp"
 	"fmt"
 	"regexp"
 	"strings"
@@ -265,11 +266,11 @@ func (lg lineGroup) joinedLines() string {
 	return s.String()
 }
 
-func (lg lineGroup) less(other lineGroup) bool {
+func (lg lineGroup) less(other lineGroup) int {
 	if c := strings.Compare(lg.joinedLines(), other.joinedLines()); c != 0 {
-		return c < 0
+		return c
 	}
-	return strings.Join(lg.comment, "\n") < strings.Join(other.comment, "\n")
+	return cmp.Compare(strings.Join(lg.comment, "\n"), strings.Join(other.comment, "\n"))
 }
 
 func (lg lineGroup) GoString() string {

keepsorted/options.go

@@ -15,15 +15,15 @@
 package keepsorted
 
 import (
+	"cmp"
+	"errors"
 	"fmt"
 	"math/big"
 	"reflect"
 	"regexp"
+	"slices"
 	"strings"
 	"unicode"
-
-	"go.uber.org/multierr"
-	"golang.org/x/exp/slices"
 )
 
 var (
@@ -99,7 +99,7 @@ func (f *Fixer) parseBlockOptions(startLine string) (blockOptions, error) {
 
 		val, err := parseBlockOption(field, startLine)
 		if err != nil {
-			errs = multierr.Append(errs, err)
+			errs = errors.Join(errs, err)
 		}
 
 		opts.Elem().Field(i).Set(val)
@@ -116,7 +116,7 @@ func (f *Fixer) parseBlockOptions(startLine string) (blockOptions, error) {
 	}
 	if len(ret.IgnorePrefixes) > 1 {
 		// Look at longer prefixes first, in case one of these prefixes is a prefix of another.
-		slices.SortFunc(ret.IgnorePrefixes, func(a string, b string) bool { return len(a) > len(b) })
+		slices.SortFunc(ret.IgnorePrefixes, func(a string, b string) int { return cmp.Compare(len(b), len(a)) })
 	}
 
 	return ret, errs