Detect now invalid path patterns in cascade

Closes #11977

7 files changed, 72 insertions, 15 deletions

diff --git a/config/allconfig/allconfig.go b/config/allconfig/allconfig.go
index 413baebd1..7052f0abd 100644
--- a/config/allconfig/allconfig.go
+++ b/config/allconfig/allconfig.go
@@ -965,7 +965,7 @@ func decodeConfigFromParams(fs afero.Fs, logger loggers.Logger, bcfg config.Base
 	})
 
 	for _, v := range decoderSetups {
-		p := decodeConfig{p: p, c: target, fs: fs, bcfg: bcfg}
+		p := decodeConfig{p: p, c: target, fs: fs, logger: logger, bcfg: bcfg}
 		if err := v.decode(v, p); err != nil {
 			return fmt.Errorf("failed to decode %q: %w", v.key, err)
 		}
diff --git a/config/allconfig/alldecoders.go b/config/allconfig/alldecoders.go
index f96c19cfc..5ab76dec5 100644
--- a/config/allconfig/alldecoders.go
+++ b/config/allconfig/alldecoders.go
@@ -18,6 +18,7 @@ import (
 	"strings"
 
 	"github.com/gohugoio/hugo/cache/filecache"
+	"github.com/gohugoio/hugo/common/loggers"
 	"github.com/gohugoio/hugo/common/maps"
 	"github.com/gohugoio/hugo/common/types"
 	"github.com/gohugoio/hugo/config"
@@ -42,10 +43,11 @@ import (
 )
 
 type decodeConfig struct {
-	p    config.Provider
-	c    *Config
-	fs   afero.Fs
-	bcfg config.BaseConfig
+	p      config.Provider
+	c      *Config
+	fs     afero.Fs
+	logger loggers.Logger
+	bcfg   config.BaseConfig
 }
 
 type decodeWeight struct {
@@ -291,7 +293,7 @@ var allDecoderSetups = map[string]decodeWeight{
 		key: "cascade",
 		decode: func(d decodeWeight, p decodeConfig) error {
 			var err error
-			p.c.Cascade, err = page.DecodeCascadeConfig(p.p.Get(d.key))
+			p.c.Cascade, err = page.DecodeCascadeConfig(p.logger, p.p.Get(d.key))
 			return err
 		},
 	},
diff --git a/hugolib/cascade_test.go b/hugolib/cascade_test.go
index 194faeb0a..bb328f761 100644
--- a/hugolib/cascade_test.go
+++ b/hugolib/cascade_test.go
@@ -671,3 +671,32 @@ S1|p1:|p2:p2|
 		`)
 	})
 }
+
+// Issue 11977.
+func TestCascadeExtensionInPath(t *testing.T) {
+	files := `
+-- hugo.toml --
+baseURL = "https://example.org"
+[languages]
+[languages.en]
+weight = 1
+[languages.de]
+-- content/_index.de.md --
++++
+[[cascade]]
+[cascade.params]
+foo = 'bar'
+[cascade._target]
+path = '/posts/post-1.de.md'
++++
+-- content/posts/post-1.de.md --
+---
+title: "Post 1"
+---
+-- layouts/_default/single.html --
+{{ .Title }}|{{ .Params.foo }}$
+`
+	b, err := TestE(t, files)
+	b.Assert(err, qt.IsNotNil)
+	b.AssertLogContains(`cascade target path "/posts/post-1.de.md" looks like a path with an extension; since Hugo v0.123.0 this will not match anything, see  https://gohugo.io/methods/page/path/`)
+}
diff --git a/hugolib/page__meta.go b/hugolib/page__meta.go
index 35b7766b6..7b785abb6 100644
--- a/hugolib/page__meta.go
+++ b/hugolib/page__meta.go
@@ -33,6 +33,7 @@ import (
 
 	"github.com/gohugoio/hugo/common/constants"
 	"github.com/gohugoio/hugo/common/hugo"
+	"github.com/gohugoio/hugo/common/loggers"
 	"github.com/gohugoio/hugo/common/maps"
 	"github.com/gohugoio/hugo/common/paths"
 	"github.com/gohugoio/hugo/config"
@@ -272,7 +273,7 @@ func (p *pageMeta) Weight() int {
 	return p.pageConfig.Weight
 }
 
-func (p *pageMeta) setMetaPre(pi *contentParseInfo, conf config.AllProvider) error {
+func (p *pageMeta) setMetaPre(pi *contentParseInfo, logger loggers.Logger, conf config.AllProvider) error {
 	frontmatter := pi.frontMatter
 	if frontmatter != nil {
 		pcfg := p.pageConfig
@@ -285,7 +286,7 @@ func (p *pageMeta) setMetaPre(pi *contentParseInfo, conf config.AllProvider) err
 		// Check for any cascade define on itself.
 		if cv, found := frontmatter["cascade"]; found {
 			var err error
-			cascade, err := page.DecodeCascade(cv)
+			cascade, err := page.DecodeCascade(logger, cv)
 			if err != nil {
 				return err
 			}
@@ -437,7 +438,6 @@ func (p *pageState) setMetaPostParams() error {
 	}
 	pm.pageConfig.Build, err = pagemeta.DecodeBuildConfig(buildConfig)
 	if err != nil {
-		//lint:ignore ST1005 end user message.
 		var msgDetail string
 		if isNewBuildKeyword {
 			msgDetail = `. We renamed the _build keyword to build in Hugo 0.123.0. We recommend putting user defined params in the params section, e.g.:
diff --git a/hugolib/page__new.go b/hugolib/page__new.go
index d846fe03c..818cbb5db 100644
--- a/hugolib/page__new.go
+++ b/hugolib/page__new.go
@@ -56,7 +56,7 @@ func (h *HugoSites) newPage(m *pageMeta) (*pageState, *paths.Path, error) {
 		return nil, nil, err
 	}
 
-	if err := m.setMetaPre(pi, h.Conf); err != nil {
+	if err := m.setMetaPre(pi, h.Log, h.Conf); err != nil {
 		return nil, nil, m.wrapError(err, h.BaseFs.SourceFs)
 	}
 	pcfg := m.pageConfig
diff --git a/resources/page/page_matcher.go b/resources/page/page_matcher.go
index fbdb25d72..466b6fe53 100644
--- a/resources/page/page_matcher.go
+++ b/resources/page/page_matcher.go
@@ -18,6 +18,7 @@ import (
 	"path/filepath"
 	"strings"
 
+	"github.com/gohugoio/hugo/common/loggers"
 	"github.com/gohugoio/hugo/common/maps"
 	"github.com/gohugoio/hugo/config"
 	"github.com/gohugoio/hugo/hugofs/glob"
@@ -90,7 +91,14 @@ var disallowedCascadeKeys = map[string]bool{
 	"lang": true,
 }
 
-func DecodeCascadeConfig(in any) (*config.ConfigNamespace[[]PageMatcherParamsConfig, map[PageMatcher]maps.Params], error) {
+// See issue 11977.
+func isGlobWithExtension(s string) bool {
+	pathParts := strings.Split(s, "/")
+	last := pathParts[len(pathParts)-1]
+	return strings.Count(last, ".") > 0
+}
+
+func DecodeCascadeConfig(logger loggers.Logger, in any) (*config.ConfigNamespace[[]PageMatcherParamsConfig, map[PageMatcher]maps.Params], error) {
 	buildConfig := func(in any) (map[PageMatcher]maps.Params, any, error) {
 		cascade := make(map[PageMatcher]maps.Params)
 		if in == nil {
@@ -119,6 +127,9 @@ func DecodeCascadeConfig(in any) (*config.ConfigNamespace[[]PageMatcherParamsCon
 
 		for _, cfg := range cfgs {
 			m := cfg.Target
+			if isGlobWithExtension(m.Path) {
+				logger.Erroridf("cascade-pattern-with-extension", "cascade target path %q looks like a path with an extension; since Hugo v0.123.0 this will not match anything, see  https://gohugo.io/methods/page/path/", m.Path)
+			}
 			c, found := cascade[m]
 			if found {
 				// Merge
@@ -139,8 +150,8 @@ func DecodeCascadeConfig(in any) (*config.ConfigNamespace[[]PageMatcherParamsCon
 }
 
 // DecodeCascade decodes in which could be either a map or a slice of maps.
-func DecodeCascade(in any) (map[PageMatcher]maps.Params, error) {
-	conf, err := DecodeCascadeConfig(in)
+func DecodeCascade(logger loggers.Logger, in any) (map[PageMatcher]maps.Params, error) {
+	conf, err := DecodeCascadeConfig(logger, in)
 	if err != nil {
 		return nil, err
 	}
diff --git a/resources/page/page_matcher_test.go b/resources/page/page_matcher_test.go
index c27a2e9b2..e659eb3b5 100644
--- a/resources/page/page_matcher_test.go
+++ b/resources/page/page_matcher_test.go
@@ -18,6 +18,7 @@ import (
 	"testing"
 
 	"github.com/gohugoio/hugo/common/hugo"
+	"github.com/gohugoio/hugo/common/loggers"
 	"github.com/gohugoio/hugo/common/maps"
 
 	qt "github.com/frankban/quicktest"
@@ -128,7 +129,7 @@ func TestDecodeCascadeConfig(t *testing.T) {
 		},
 	}
 
-	got, err := DecodeCascadeConfig(in)
+	got, err := DecodeCascadeConfig(loggers.NewDefault(), in)
 
 	c.Assert(err, qt.IsNil)
 	c.Assert(got, qt.IsNotNil)
@@ -150,7 +151,7 @@ func TestDecodeCascadeConfig(t *testing.T) {
 		{Params: maps.Params{"b": string("bv")}, Target: PageMatcher{Kind: "page"}},
 	})
 
-	got, err = DecodeCascadeConfig(nil)
+	got, err = DecodeCascadeConfig(loggers.NewDefault(), nil)
 	c.Assert(err, qt.IsNil)
 	c.Assert(got, qt.IsNotNil)
 }
@@ -172,3 +173,17 @@ func (c testConfig) Running() bool {
 func (c testConfig) WorkingDir() string {
 	return c.workingDir
 }
+
+func TestIsGlobWithExtension(t *testing.T) {
+	c := qt.New(t)
+
+	c.Assert(isGlobWithExtension("index.md"), qt.Equals, true)
+	c.Assert(isGlobWithExtension("foo/index.html"), qt.Equals, true)
+	c.Assert(isGlobWithExtension("posts/page"), qt.Equals, false)
+	c.Assert(isGlobWithExtension("pa.th/foo"), qt.Equals, false)
+	c.Assert(isGlobWithExtension(""), qt.Equals, false)
+	c.Assert(isGlobWithExtension("*.md?"), qt.Equals, true)
+	c.Assert(isGlobWithExtension("*.md*"), qt.Equals, true)
+	c.Assert(isGlobWithExtension("posts/*"), qt.Equals, false)
+	c.Assert(isGlobWithExtension("*.md"), qt.Equals, true)
+}