Fix raw TOML dates in where/eq

Note that this has only been a problem with "raw dates" in TOML files in /data and similar. The predefined front matter
dates `.Date` etc. are converted to a Go Time and has worked fine even after upgrading to v2 of the go-toml lib.

Fixes #9979

common/hreflect/helpers.go

@@ -20,7 +20,9 @@ import (
 	"context"
 	"reflect"
 	"sync"
+	"time"
 
+	"github.com/gohugoio/hugo/common/htime"
 	"github.com/gohugoio/hugo/common/types"
 )
 
@@ -168,6 +170,44 @@ func GetMethodIndexByName(tp reflect.Type, name string) int {
 	return m.Index
 }
 
+var (
+	timeType           = reflect.TypeOf((*time.Time)(nil)).Elem()
+	asTimeProviderType = reflect.TypeOf((*htime.AsTimeProvider)(nil)).Elem()
+)
+
+// IsTime returns whether tp is a time.Time type or if it can be converted into one
+// in ToTime.
+func IsTime(tp reflect.Type) bool {
+	if tp == timeType {
+		return true
+	}
+
+	if tp.Implements(asTimeProviderType) {
+		return true
+	}
+	return false
+}
+
+// AsTime returns v as a time.Time if possible.
+// The given location is only used if the value implements AsTimeProvider (e.g. go-toml local).
+// A zero Time and false is returned if this isn't possible.
+// Note that this function does not accept string dates.
+func AsTime(v reflect.Value, loc *time.Location) (time.Time, bool) {
+	if v.Kind() == reflect.Interface {
+		return AsTime(v.Elem(), loc)
+	}
+
+	if v.Type() == timeType {
+		return v.Interface().(time.Time), true
+	}
+
+	if v.Type().Implements(asTimeProviderType) {
+		return v.Interface().(htime.AsTimeProvider).AsTime(loc), true
+	}
+
+	return time.Time{}, false
+}
+
 // Based on: https://github.com/golang/go/blob/178a2c42254166cffed1b25fb1d3c7a5727cada6/src/text/template/exec.go#L931
 func indirectInterface(v reflect.Value) reflect.Value {
 	if v.Kind() != reflect.Interface {

common/htime/time.go

@@ -20,8 +20,6 @@ import (
 	"github.com/bep/clock"
 	"github.com/spf13/cast"
 
-	toml "github.com/pelletier/go-toml/v2"
-
 	"github.com/gohugoio/locales"
 )
 
@@ -139,13 +137,12 @@ func (f TimeFormatter) Format(t time.Time, layout string) string {
 
 func ToTimeInDefaultLocationE(i any, location *time.Location) (tim time.Time, err error) {
 	switch vv := i.(type) {
-	case toml.LocalDate:
-		return vv.AsTime(location), nil
-	case toml.LocalDateTime:
+	case AsTimeProvider:
 		return vv.AsTime(location), nil
 	// issue #8895
 	// datetimes parsed by `go-toml` have empty zone name
 	// convert back them into string and use `cast`
+	// TODO(bep) add tests, make sure we really need this.
 	case time.Time:
 		i = vv.Format(time.RFC3339)
 	}
@@ -161,3 +158,8 @@ func Now() time.Time {
 func Since(t time.Time) time.Duration {
 	return Clock.Since(t)
 }
+
+// AsTimeProvider is implemented by go-toml's LocalDate and LocalDateTime.
+type AsTimeProvider interface {
+	AsTime(zone *time.Location) time.Time
+}

hugolib/dates_test.go

@@ -214,3 +214,62 @@ func TestTimeOnError(t *testing.T) {
 	b.Assert(b.BuildE(BuildCfg{}), qt.Not(qt.IsNil))
 
 }
+
+func TestTOMLDates(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- config.toml --
+timeZone = "America/Los_Angeles"
+-- content/_index.md --
+---
+date: "2020-10-20"
+---
+-- content/p1.md --
++++
+title = "TOML Date with UTC offset"
+date = 2021-08-16T06:00:00+00:00
++++
+
+
+## Foo
+-- data/mydata.toml --
+date = 2020-10-20
+talks = [
+	{ date = 2017-01-23, name = "Past talk 1" },
+	{ date = 2017-01-24, name = "Past talk 2" },
+	{ date = 2017-01-26, name = "Past talk 3" },
+	{ date = 2050-02-12, name = "Future talk 1" },
+	{ date = 2050-02-13, name = "Future talk 2" },
+]
+-- layouts/index.html --
+{{ $futureTalks := where site.Data.mydata.talks "date" ">" now }}
+{{ $pastTalks := where site.Data.mydata.talks "date" "<" now }}
+
+{{ $homeDate := site.Home.Date }}
+{{ $p1Date := (site.GetPage "p1").Date }}
+Future talks: {{ len $futureTalks }}
+Past talks: {{ len $pastTalks }}
+
+Home's Date should be greater than past: {{ gt $homeDate (index $pastTalks 0).date }}
+Home's Date should be less than future: {{ lt $homeDate (index $futureTalks 0).date }}
+Home's Date should be equal mydata date: {{ eq $homeDate site.Data.mydata.date }}
+Full time: {{ $p1Date | time.Format ":time_full" }}
+`
+
+	b := NewIntegrationTestBuilder(
+		IntegrationTestConfig{
+			T:           t,
+			TxtarString: files,
+		},
+	).Build()
+
+	b.AssertFileContent("public/index.html", `
+Future talks: 2
+Past talks: 3
+Home's Date should be greater than past: true
+Home's Date should be less than future: true
+Home's Date should be equal mydata date: true
+Full time: 6:00:00 am UTC
+`)
+}

tpl/collections/append_test.go

@@ -18,15 +18,17 @@ import (
 	"testing"
 
 	qt "github.com/frankban/quicktest"
+	"github.com/gohugoio/hugo/config"
 	"github.com/gohugoio/hugo/deps"
+	"github.com/gohugoio/hugo/langs"
 )
 
 // Also see tests in common/collection.
 func TestAppend(t *testing.T) {
 	t.Parallel()
 	c := qt.New(t)
 
-	ns := New(&deps.Deps{})
+	ns := New(&deps.Deps{Language: langs.NewDefaultLanguage(config.New())})
 
 	for i, test := range []struct {
 		start    any

tpl/collections/apply_test.go

@@ -21,7 +21,9 @@ import (
 	"testing"
 
 	qt "github.com/frankban/quicktest"
+	"github.com/gohugoio/hugo/config"
 	"github.com/gohugoio/hugo/deps"
+	"github.com/gohugoio/hugo/langs"
 	"github.com/gohugoio/hugo/output"
 	"github.com/gohugoio/hugo/tpl"
 )
@@ -67,7 +69,7 @@ func (templateFinder) GetFunc(name string) (reflect.Value, bool) {
 func TestApply(t *testing.T) {
 	t.Parallel()
 	c := qt.New(t)
-	d := &deps.Deps{}
+	d := &deps.Deps{Language: langs.NewDefaultLanguage(config.New())}
 	d.SetTmpl(new(templateFinder))
 	ns := New(d)
 

tpl/collections/collections.go

@@ -31,6 +31,8 @@ import (
 	"github.com/gohugoio/hugo/common/types"
 	"github.com/gohugoio/hugo/deps"
 	"github.com/gohugoio/hugo/helpers"
+	"github.com/gohugoio/hugo/langs"
+	"github.com/gohugoio/hugo/tpl/compare"
 	"github.com/spf13/cast"
 )
 
@@ -41,14 +43,24 @@ func init() {
 
 // New returns a new instance of the collections-namespaced template functions.
 func New(deps *deps.Deps) *Namespace {
+	if deps.Language == nil {
+		panic("language must be set")
+	}
+
+	loc := langs.GetLocation(deps.Language)
+
 	return &Namespace{
-		deps: deps,
+		loc:      loc,
+		sortComp: compare.New(loc, true),
+		deps:     deps,
 	}
 }
 
 // Namespace provides template functions for the "collections" namespace.
 type Namespace struct {
-	deps *deps.Deps
+	loc      *time.Location
+	sortComp *compare.Namespace
+	deps     *deps.Deps
 }
 
 // After returns all the items after the first N in a rangeable list.

tpl/collections/collections_test.go

@@ -40,7 +40,7 @@ func TestAfter(t *testing.T) {
 	t.Parallel()
 	c := qt.New(t)
 
-	ns := New(&deps.Deps{})
+	ns := New(&deps.Deps{Language: langs.NewDefaultLanguage(config.New())})
 
 	for i, test := range []struct {
 		index  any
@@ -97,7 +97,7 @@ func (g *tstGrouper2) Group(key any, items any) (any, error) {
 func TestGroup(t *testing.T) {
 	t.Parallel()
 	c := qt.New(t)
-	ns := New(&deps.Deps{})
+	ns := New(&deps.Deps{Language: langs.NewDefaultLanguage(config.New())})
 
 	for i, test := range []struct {
 		key    any
@@ -187,7 +187,7 @@ func TestDelimit(t *testing.T) {
 func TestDictionary(t *testing.T) {
 	c := qt.New(t)
 
-	ns := New(&deps.Deps{})
+	ns := New(&deps.Deps{Language: langs.NewDefaultLanguage(config.New())})
 
 	for i, test := range []struct {
 		values []any
@@ -226,7 +226,7 @@ func TestDictionary(t *testing.T) {
 func TestReverse(t *testing.T) {
 	t.Parallel()
 	c := qt.New(t)
-	ns := New(&deps.Deps{})
+	ns := New(&deps.Deps{Language: langs.NewDefaultLanguage(config.New())})
 
 	s := []string{"a", "b", "c"}
 	reversed, err := ns.Reverse(s)
@@ -245,7 +245,7 @@ func TestEchoParam(t *testing.T) {
 	t.Parallel()
 	c := qt.New(t)
 
-	ns := New(&deps.Deps{})
+	ns := New(&deps.Deps{Language: langs.NewDefaultLanguage(config.New())})
 
 	for i, test := range []struct {
 		a      any
@@ -277,7 +277,7 @@ func TestFirst(t *testing.T) {
 	t.Parallel()
 	c := qt.New(t)
 
-	ns := New(&deps.Deps{})
+	ns := New(&deps.Deps{Language: langs.NewDefaultLanguage(config.New())})
 
 	for i, test := range []struct {
 		limit  any
@@ -315,7 +315,7 @@ func TestIn(t *testing.T) {
 	t.Parallel()
 	c := qt.New(t)
 
-	ns := New(&deps.Deps{})
+	ns := New(&deps.Deps{Language: langs.NewDefaultLanguage(config.New())})
 
 	for i, test := range []struct {
 		l1     any
@@ -391,7 +391,7 @@ func TestIntersect(t *testing.T) {
 	t.Parallel()
 	c := qt.New(t)
 
-	ns := New(&deps.Deps{})
+	ns := New(&deps.Deps{Language: langs.NewDefaultLanguage(config.New())})
 
 	for i, test := range []struct {
 		l1, l2 any
@@ -518,7 +518,7 @@ func TestLast(t *testing.T) {
 	t.Parallel()
 	c := qt.New(t)
 
-	ns := New(&deps.Deps{})
+	ns := New(&deps.Deps{Language: langs.NewDefaultLanguage(config.New())})
 
 	for i, test := range []struct {
 		limit  any
@@ -557,7 +557,7 @@ func TestLast(t *testing.T) {
 func TestQuerify(t *testing.T) {
 	t.Parallel()
 	c := qt.New(t)
-	ns := New(&deps.Deps{})
+	ns := New(&deps.Deps{Language: langs.NewDefaultLanguage(config.New())})
 
 	for i, test := range []struct {
 		params []any
@@ -591,7 +591,7 @@ func TestQuerify(t *testing.T) {
 }
 
 func BenchmarkQuerify(b *testing.B) {
-	ns := New(&deps.Deps{})
+	ns := New(&deps.Deps{Language: langs.NewDefaultLanguage(config.New())})
 	params := []any{"a", "b", "c", "d", "f", " &"}
 
 	b.ResetTimer()
@@ -604,7 +604,7 @@ func BenchmarkQuerify(b *testing.B) {
 }
 
 func BenchmarkQuerifySlice(b *testing.B) {
-	ns := New(&deps.Deps{})
+	ns := New(&deps.Deps{Language: langs.NewDefaultLanguage(config.New())})
 	params := []string{"a", "b", "c", "d", "f", " &"}
 
 	b.ResetTimer()
@@ -619,7 +619,7 @@ func BenchmarkQuerifySlice(b *testing.B) {
 func TestSeq(t *testing.T) {
 	t.Parallel()
 	c := qt.New(t)
-	ns := New(&deps.Deps{})
+	ns := New(&deps.Deps{Language: langs.NewDefaultLanguage(config.New())})
 
 	for i, test := range []struct {
 		args   []any
@@ -663,7 +663,7 @@ func TestSeq(t *testing.T) {
 func TestShuffle(t *testing.T) {
 	t.Parallel()
 	c := qt.New(t)
-	ns := New(&deps.Deps{})
+	ns := New(&deps.Deps{Language: langs.NewDefaultLanguage(config.New())})
 
 	for i, test := range []struct {
 		seq     any
@@ -703,7 +703,7 @@ func TestShuffle(t *testing.T) {
 func TestShuffleRandomising(t *testing.T) {
 	t.Parallel()
 	c := qt.New(t)
-	ns := New(&deps.Deps{})
+	ns := New(&deps.Deps{Language: langs.NewDefaultLanguage(config.New())})
 
 	// Note that this test can fail with false negative result if the shuffle
 	// of the sequence happens to be the same as the original sequence. However
@@ -734,7 +734,7 @@ func TestShuffleRandomising(t *testing.T) {
 func TestSlice(t *testing.T) {
 	t.Parallel()
 	c := qt.New(t)
-	ns := New(&deps.Deps{})
+	ns := New(&deps.Deps{Language: langs.NewDefaultLanguage(config.New())})
 
 	for i, test := range []struct {
 		args     []any
@@ -758,7 +758,7 @@ func TestUnion(t *testing.T) {
 	t.Parallel()
 	c := qt.New(t)
 
-	ns := New(&deps.Deps{})
+	ns := New(&deps.Deps{Language: langs.NewDefaultLanguage(config.New())})
 
 	for i, test := range []struct {
 		l1     any
@@ -847,7 +847,7 @@ func TestUnion(t *testing.T) {
 func TestUniq(t *testing.T) {
 	t.Parallel()
 	c := qt.New(t)
-	ns := New(&deps.Deps{})
+	ns := New(&deps.Deps{Language: langs.NewDefaultLanguage(config.New())})
 	for i, test := range []struct {
 		l      any
 		expect any
@@ -979,6 +979,7 @@ func newDeps(cfg config.Provider) *deps.Deps {
 		panic(err)
 	}
 	return &deps.Deps{
+		Language:    l,
 		Cfg:         cfg,
 		Fs:          hugofs.NewMem(l),
 		ContentSpec: cs,