all: Rework page store, add a dynacache, improve partial rebuilds, and some general spring cleaningdevelop2024

There are some breaking changes in this commit, see #11455.

Closes #11455
Closes #11549

This fixes a set of bugs (see issue list) and it is also paying some technical debt accumulated over the years. We now build with Staticcheck enabled in the CI build.

The performance should be about the same as before for regular sized Hugo sites, but it should perform and scale much better to larger data sets, as objects that uses lots of memory (e.g. rendered Markdown, big JSON files read into maps with transform.Unmarshal etc.) will now get automatically garbage collected if needed. Performance on partial rebuilds when running the server in fast render mode should be the same, but the change detection should be much more accurate.

A list of the notable new features:

* A new dependency tracker that covers (almost) all of Hugo's API and is used to do fine grained partial rebuilds when running the server.
* A new and simpler tree document store which allows fast lookups and prefix-walking in all dimensions (e.g. language) concurrently.
* You can now configure an upper memory limit allowing for much larger data sets and/or running on lower specced PCs.
We have lifted the "no resources in sub folders" restriction for branch bundles (e.g. sections).
Memory Limit
* Hugos will, by default, set aside a quarter of the total system memory, but you can set this via the OS environment variable HUGO_MEMORYLIMIT (in gigabytes). This is backed by a partitioned LRU cache used throughout Hugo. A cache that gets dynamically resized in low memory situations, allowing Go's Garbage Collector to free the memory.

New Dependency Tracker: Hugo has had a rule based coarse grained approach to server rebuilds that has worked mostly pretty well, but there have been some surprises (e.g. stale content). This is now revamped with a new dependency tracker that can quickly calculate the delta given a changed resource (e.g. a content file, template, JS file etc.). This handles transitive relations, e.g. $page -> js.Build -> JS import, or $page1.Content -> render hook -> site.GetPage -> $page2.Title, or $page1.Content -> shortcode -> partial -> site.RegularPages -> $page2.Content -> shortcode ..., and should also handle changes to aggregated values (e.g. site.Lastmod) effectively.

This covers all of Hugo's API with 2 known exceptions (a list that may not be fully exhaustive):

Changes to files loaded with template func os.ReadFile may not be handled correctly. We recommend loading resources with resources.Get
Changes to Hugo objects (e.g. Page) passed in the template context to lang.Translate may not be detected correctly. We recommend having simple i18n templates without too much data context passed in other than simple types such as strings and numbers.
Note that the cachebuster configuration (when A changes then rebuild B) works well with the above, but we recommend that you revise that configuration, as it in most situations should not be needed. One example where it is still needed is with TailwindCSS and using changes to hugo_stats.json to trigger new CSS rebuilds.

Document Store: Previously, a little simplified, we split the document store (where we store pages and resources) in a tree per language. This worked pretty well, but the structure made some operations harder than they needed to be. We have now restructured it into one Radix tree for all languages. Internally the language is considered to be a dimension of that tree, and the tree can be viewed in all dimensions concurrently. This makes some operations re. language simpler (e.g. finding translations is just a slice range), but the idea is that it should also be relatively inexpensive to add more dimensions if needed (e.g. role).

Fixes #10169
Fixes #10364
Fixes #10482
Fixes #10630
Fixes #10656
Fixes #10694
Fixes #10918
Fixes #11262
Fixes #11439
Fixes #11453
Fixes #11457
Fixes #11466
Fixes #11540
Fixes #11551
Fixes #11556
Fixes #11654
Fixes #11661
Fixes #11663
Fixes #11664
Fixes #11669
Fixes #11671
Fixes #11807
Fixes #11808
Fixes #11809
Fixes #11815
Fixes #11840
Fixes #11853
Fixes #11860
Fixes #11883
Fixes #11904
Fixes #7388
Fixes #7425
Fixes #7436
Fixes #7544
Fixes #7882
Fixes #7960
Fixes #8255
Fixes #8307
Fixes #8863
Fixes #8927
Fixes #9192
Fixes #9324

13 files changed, 149 insertions, 120 deletions

diff --git a/config/allconfig/allconfig.go b/config/allconfig/allconfig.go
index 9f0d73ecd..5788e792b 100644
--- a/config/allconfig/allconfig.go
+++ b/config/allconfig/allconfig.go
@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -30,6 +30,7 @@ import (
 	"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/common/urls"
 	"github.com/gohugoio/hugo/config"
 	"github.com/gohugoio/hugo/config/privacy"
@@ -283,12 +284,13 @@ func (c *Config) CompileConfig(logger loggers.Logger) error {
 
 	disabledLangs := make(map[string]bool)
 	for _, lang := range c.DisableLanguages {
-		if lang == c.DefaultContentLanguage {
-			return fmt.Errorf("cannot disable default content language %q", lang)
-		}
 		disabledLangs[lang] = true
 	}
 	for lang, language := range c.Languages {
+		if !language.Disabled && disabledLangs[lang] {
+			language.Disabled = true
+			c.Languages[lang] = language
+		}
 		if language.Disabled {
 			disabledLangs[lang] = true
 			if lang == c.DefaultContentLanguage {
@@ -408,15 +410,19 @@ type ConfigCompiled struct {
 }
 
 // This may be set after the config is compiled.
-func (c *ConfigCompiled) SetMainSectionsIfNotSet(sections []string) {
+func (c *ConfigCompiled) SetMainSections(sections []string) {
 	c.mu.Lock()
 	defer c.mu.Unlock()
-	if c.MainSections != nil {
-		return
-	}
 	c.MainSections = sections
 }
 
+// IsMainSectionsSet returns whether the main sections have been set.
+func (c *ConfigCompiled) IsMainSectionsSet() bool {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	return c.MainSections != nil
+}
+
 // This is set after the config is compiled by the server command.
 func (c *ConfigCompiled) SetBaseURL(baseURL, baseURLLiveReload urls.BaseURL) {
 	c.BaseURL = baseURL
@@ -425,7 +431,6 @@ func (c *ConfigCompiled) SetBaseURL(baseURL, baseURLLiveReload urls.BaseURL) {
 
 // RootConfig holds all the top-level configuration options in Hugo
 type RootConfig struct {
-
 	// The base URL of the site.
 	// Note that the default value is empty, but Hugo requires a valid URL (e.g. "https://example.com/") to work properly.
 	// <docsmeta>{"identifiers": ["URL"] }</docsmeta>
@@ -648,13 +653,16 @@ type Configs struct {
 	LanguageConfigMap   map[string]*Config
 	LanguageConfigSlice []*Config
 
-	IsMultihost           bool
-	Languages             langs.Languages
-	LanguagesDefaultFirst langs.Languages
+	IsMultihost bool
 
 	Modules       modules.Modules
 	ModulesClient *modules.Client
 
+	// All below is set in Init.
+	Languages             langs.Languages
+	LanguagesDefaultFirst langs.Languages
+	ContentPathParser     paths.PathParser
+
 	configLangs []config.AllProvider
 }
 
@@ -674,6 +682,58 @@ func (c *Configs) IsZero() bool {
 }
 
 func (c *Configs) Init() error {
+	var languages langs.Languages
+	defaultContentLanguage := c.Base.DefaultContentLanguage
+	for k, v := range c.LanguageConfigMap {
+		c.LanguageConfigSlice = append(c.LanguageConfigSlice, v)
+		languageConf := v.Languages[k]
+		language, err := langs.NewLanguage(k, defaultContentLanguage, v.TimeZone, languageConf)
+		if err != nil {
+			return err
+		}
+		languages = append(languages, language)
+	}
+
+	// Sort the sites by language weight (if set) or lang.
+	sort.Slice(languages, func(i, j int) bool {
+		li := languages[i]
+		lj := languages[j]
+		if li.Weight != lj.Weight {
+			return li.Weight < lj.Weight
+		}
+		return li.Lang < lj.Lang
+	})
+
+	for _, l := range languages {
+		c.LanguageConfigSlice = append(c.LanguageConfigSlice, c.LanguageConfigMap[l.Lang])
+	}
+
+	// Filter out disabled languages.
+	var n int
+	for _, l := range languages {
+		if !l.Disabled {
+			languages[n] = l
+			n++
+		}
+	}
+	languages = languages[:n]
+
+	var languagesDefaultFirst langs.Languages
+	for _, l := range languages {
+		if l.Lang == defaultContentLanguage {
+			languagesDefaultFirst = append(languagesDefaultFirst, l)
+		}
+	}
+	for _, l := range languages {
+		if l.Lang != defaultContentLanguage {
+			languagesDefaultFirst = append(languagesDefaultFirst, l)
+		}
+	}
+
+	c.Languages = languages
+	c.LanguagesDefaultFirst = languagesDefaultFirst
+	c.ContentPathParser = paths.PathParser{LanguageIndex: languagesDefaultFirst.AsIndexSet()}
+
 	c.configLangs = make([]config.AllProvider, len(c.Languages))
 	for i, l := range c.LanguagesDefaultFirst {
 		c.configLangs[i] = ConfigLanguage{
@@ -751,7 +811,6 @@ func fromLoadConfigResult(fs afero.Fs, logger loggers.Logger, res config.LoadCon
 	}
 
 	langConfigMap := make(map[string]*Config)
-	var langConfigs []*Config
 
 	languagesConfig := cfg.GetStringMap("languages")
 	var isMultiHost bool
@@ -848,65 +907,24 @@ func fromLoadConfigResult(fs afero.Fs, logger loggers.Logger, res config.LoadCon
 		}
 	}
 
-	var languages langs.Languages
-	defaultContentLanguage := all.DefaultContentLanguage
-	for k, v := range langConfigMap {
-		languageConf := v.Languages[k]
-		language, err := langs.NewLanguage(k, defaultContentLanguage, v.TimeZone, languageConf)
-		if err != nil {
-			return nil, err
-		}
-		languages = append(languages, language)
-	}
-
-	// Sort the sites by language weight (if set) or lang.
-	sort.Slice(languages, func(i, j int) bool {
-		li := languages[i]
-		lj := languages[j]
-		if li.Weight != lj.Weight {
-			return li.Weight < lj.Weight
-		}
-		return li.Lang < lj.Lang
-	})
-
-	for _, l := range languages {
-		langConfigs = append(langConfigs, langConfigMap[l.Lang])
-	}
-
-	var languagesDefaultFirst langs.Languages
-	for _, l := range languages {
-		if l.Lang == defaultContentLanguage {
-			languagesDefaultFirst = append(languagesDefaultFirst, l)
-		}
-	}
-	for _, l := range languages {
-		if l.Lang != defaultContentLanguage {
-			languagesDefaultFirst = append(languagesDefaultFirst, l)
-		}
-	}
-
 	bcfg.PublishDir = all.PublishDir
 	res.BaseConfig = bcfg
 	all.CommonDirs.CacheDir = bcfg.CacheDir
-	for _, l := range langConfigs {
+	for _, l := range langConfigMap {
 		l.CommonDirs.CacheDir = bcfg.CacheDir
 	}
 
 	cm := &Configs{
-		Base:                  all,
-		LanguageConfigMap:     langConfigMap,
-		LanguageConfigSlice:   langConfigs,
-		LoadingInfo:           res,
-		IsMultihost:           isMultiHost,
-		Languages:             languages,
-		LanguagesDefaultFirst: languagesDefaultFirst,
+		Base:              all,
+		LanguageConfigMap: langConfigMap,
+		LoadingInfo:       res,
+		IsMultihost:       isMultiHost,
 	}
 
 	return cm, nil
 }
 
 func decodeConfigFromParams(fs afero.Fs, logger loggers.Logger, bcfg config.BaseConfig, p config.Provider, target *Config, keys []string) error {
-
 	var decoderSetups []decodeWeight
 
 	if len(keys) == 0 {
diff --git a/config/allconfig/alldecoders.go b/config/allconfig/alldecoders.go
index dc58882f3..f96c19cfc 100644
--- a/config/allconfig/alldecoders.go
+++ b/config/allconfig/alldecoders.go
@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/config/allconfig/configlanguage.go b/config/allconfig/configlanguage.go
index 2c5a116f4..71bd232de 100644
--- a/config/allconfig/configlanguage.go
+++ b/config/allconfig/configlanguage.go
@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -16,6 +16,7 @@ package allconfig
 import (
 	"time"
 
+	"github.com/gohugoio/hugo/common/paths"
 	"github.com/gohugoio/hugo/common/urls"
 	"github.com/gohugoio/hugo/config"
 	"github.com/gohugoio/hugo/langs"
@@ -41,10 +42,15 @@ func (c ConfigLanguage) LanguagesDefaultFirst() langs.Languages {
 	return c.m.LanguagesDefaultFirst
 }
 
+func (c ConfigLanguage) PathParser() paths.PathParser {
+	return c.m.ContentPathParser
+}
+
 func (c ConfigLanguage) LanguagePrefix() string {
 	if c.DefaultContentLanguageInSubdir() && c.DefaultContentLanguage() == c.Language().Lang {
 		return c.Language().Lang
 	}
+
 	if !c.IsMultiLingual() || c.DefaultContentLanguage() == c.Language().Lang {
 		return ""
 	}
@@ -119,6 +125,10 @@ func (c ConfigLanguage) Quiet() bool {
 	return c.m.Base.Internal.Quiet
 }
 
+func (c ConfigLanguage) Watching() bool {
+	return c.m.Base.Internal.Watch
+}
+
 // GetConfigSection is mostly used in tests. The switch statement isn't complete, but what's in use.
 func (c ConfigLanguage) GetConfigSection(s string) any {
 	switch s {
diff --git a/config/allconfig/docshelper.go b/config/allconfig/docshelper.go
index 48a09de51..1a5fb6153 100644
--- a/config/allconfig/docshelper.go
+++ b/config/allconfig/docshelper.go
@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -22,7 +22,6 @@ import (
 // This is is just some helpers used to create some JSON used in the Hugo docs.
 func init() {
 	docsProvider := func() docshelper.DocProvider {
-
 		cfg := config.New()
 		for configRoot, v := range allDecoderSetups {
 			if v.internalOrDeprecated {
diff --git a/config/allconfig/integration_test.go b/config/allconfig/integration_test.go
index fcb92e71d..4f2f1a06e 100644
--- a/config/allconfig/integration_test.go
+++ b/config/allconfig/integration_test.go
@@ -10,7 +10,6 @@ import (
 )
 
 func TestDirsMount(t *testing.T) {
-
 	files := `
 -- hugo.toml --
 baseURL = "https://example.com"
@@ -44,7 +43,7 @@ Title: {{ .Title }}
 		hugolib.IntegrationTestConfig{T: t, TxtarString: files},
 	).Build()
 
-	//b.AssertFileContent("public/p1/index.html", "Title: p1")
+	// b.AssertFileContent("public/p1/index.html", "Title: p1")
 
 	sites := b.H.Sites
 	b.Assert(len(sites), qt.Equals, 2)
@@ -58,7 +57,7 @@ Title: {{ .Title }}
 	enConcp := sites[0].Conf
 	enConf := enConcp.GetConfig().(*allconfig.Config)
 
-	b.Assert(enConcp.BaseURL().String(), qt.Equals, "https://example.com")
+	b.Assert(enConcp.BaseURL().String(), qt.Equals, "https://example.com/")
 	modConf := enConf.Module
 	b.Assert(modConf.Mounts, qt.HasLen, 8)
 	b.Assert(modConf.Mounts[0].Source, qt.Equals, filepath.FromSlash("content/en"))
@@ -67,11 +66,9 @@ Title: {{ .Title }}
 	b.Assert(modConf.Mounts[1].Source, qt.Equals, filepath.FromSlash("content/sv"))
 	b.Assert(modConf.Mounts[1].Target, qt.Equals, "content")
 	b.Assert(modConf.Mounts[1].Lang, qt.Equals, "sv")
-
 }
 
 func TestConfigAliases(t *testing.T) {
-
 	files := `
 -- hugo.toml --
 baseURL = "https://example.com"
diff --git a/config/allconfig/load.go b/config/allconfig/load.go
index 7d706c7e3..eceed31f4 100644
--- a/config/allconfig/load.go
+++ b/config/allconfig/load.go
@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -37,6 +37,7 @@ import (
 	"github.com/spf13/afero"
 )
 
+//lint:ignore ST1005 end user message.
 var ErrNoConfigFile = errors.New("Unable to locate config file or config directory. Perhaps you need to create a new site.\n       Run `hugo help new` for details.\n")
 
 func LoadConfig(d ConfigSourceDescriptor) (*Configs, error) {
@@ -566,15 +567,6 @@ func (l configLoader) deleteMergeStrategies() {
 	})
 }
 
-func (l configLoader) loadModulesConfig() (modules.Config, error) {
-	modConfig, err := modules.DecodeConfig(l.cfg)
-	if err != nil {
-		return modules.Config{}, err
-	}
-
-	return modConfig, nil
-}
-
 func (l configLoader) wrapFileError(err error, filename string) error {
 	fe := herrors.UnwrapFileError(err)
 	if fe != nil {
diff --git a/config/commonConfig.go b/config/commonConfig.go
index ef9d47553..6ca061093 100644
--- a/config/commonConfig.go
+++ b/config/commonConfig.go
@@ -86,28 +86,21 @@ var defaultBuild = BuildConfig{
 
 	CacheBusters: []CacheBuster{
 		{
-			Source: `assets/.*\.(js|ts|jsx|tsx)`,
-			Target: `(js|scripts|javascript)`,
-		},
-		{
-			Source: `assets/.*\.(css|sass|scss)$`,
-			Target: cssTargetCachebusterRe,
-		},
-		{
 			Source: `(postcss|tailwind)\.config\.js`,
 			Target: cssTargetCachebusterRe,
 		},
-		// This is deliberately coarse grained; it will cache bust resources with "json" in the cache key when js files changes, which is good.
-		{
-			Source: `assets/.*\.(.*)$`,
-			Target: `$1`,
-		},
 	},
 }
 
 // BuildConfig holds some build related configuration.
 type BuildConfig struct {
-	UseResourceCacheWhen string // never, fallback, always. Default is fallback
+	// When to use the resource file cache.
+	// One of never, fallback, always. Default is fallback
+	UseResourceCacheWhen string
+
+	// When enabled, will duplicate bundled resource files across languages that
+	// doesn't have a translated version.
+	DuplicateResourceFiles bool
 
 	// When enabled, will collect and write a hugo_stats.json with some build
 	// related aggregated data (e.g. CSS class names).
@@ -373,7 +366,6 @@ func (c *CacheBuster) CompileConfig(logger loggers.Logger) error {
 
 			return match
 		}
-
 	}
 	return compileErr
 }
@@ -416,7 +408,6 @@ func DecodeServer(cfg Provider) (Server, error) {
 				Status: 404,
 			},
 		}
-
 	}
 
 	return *s, nil
diff --git a/config/commonConfig_test.go b/config/commonConfig_test.go
index 8aa1318dd..425d3e970 100644
--- a/config/commonConfig_test.go
+++ b/config/commonConfig_test.go
@@ -148,21 +148,13 @@ func TestBuildConfigCacheBusters(t *testing.T) {
 	l := loggers.NewDefault()
 	c.Assert(conf.CompileConfig(l), qt.IsNil)
 
-	m, err := conf.MatchCacheBuster(l, "assets/foo/main.js")
-	c.Assert(err, qt.IsNil)
+	m, _ := conf.MatchCacheBuster(l, "tailwind.config.js")
 	c.Assert(m, qt.IsNotNil)
-	c.Assert(m("scripts"), qt.IsTrue)
-	c.Assert(m("asdf"), qt.IsFalse)
-
-	m, _ = conf.MatchCacheBuster(l, "tailwind.config.js")
 	c.Assert(m("css"), qt.IsTrue)
 	c.Assert(m("js"), qt.IsFalse)
 
-	m, err = conf.MatchCacheBuster(l, "assets/foo.json")
-	c.Assert(err, qt.IsNil)
-	c.Assert(m, qt.IsNotNil)
-	c.Assert(m("json"), qt.IsTrue)
-
+	m, _ = conf.MatchCacheBuster(l, "foo.bar")
+	c.Assert(m, qt.IsNil)
 }
 
 func TestBuildConfigCacheBusterstTailwindSetup(t *testing.T) {
diff --git a/config/configProvider.go b/config/configProvider.go
index 11099e407..2536639ea 100644
--- a/config/configProvider.go
+++ b/config/configProvider.go
@@ -17,6 +17,7 @@ import (
 	"time"
 
 	"github.com/gohugoio/hugo/common/maps"
+	"github.com/gohugoio/hugo/common/paths"
 	"github.com/gohugoio/hugo/common/types"
 	"github.com/gohugoio/hugo/common/urls"
 	"github.com/gohugoio/hugo/langs"
@@ -30,6 +31,7 @@ type AllProvider interface {
 	LanguagePrefix() string
 	BaseURL() urls.BaseURL
 	BaseURLLiveReload() urls.BaseURL
+	PathParser() paths.PathParser
 	Environment() string
 	IsMultihost() bool
 	IsMultiLingual() bool
@@ -54,6 +56,7 @@ type AllProvider interface {
 	BuildFuture() bool
 	BuildDrafts() bool
 	Running() bool
+	Watching() bool
 	PrintUnusedTemplates() bool
 	EnableMissingTranslationPlaceholders() bool
 	TemplateMetrics() bool
diff --git a/config/env.go b/config/env.go
index 1e9266b17..0ad5ecaea 100644
--- a/config/env.go
+++ b/config/env.go
@@ -18,6 +18,12 @@ import (
 	"runtime"
 	"strconv"
 	"strings"
+
+	"github.com/pbnjay/memory"
+)
+
+const (
+	gigabyte = 1 << 30
 )
 
 // GetNumWorkerMultiplier returns the base value used to calculate the number
@@ -33,6 +39,37 @@ func GetNumWorkerMultiplier() int {
 	return runtime.NumCPU()
 }
 
+// GetMemoryLimit returns the upper memory limit in bytes for Hugo's in-memory caches.
+// Note that this does not represent "all of the memory" that Hugo will use,
+// so it needs to be set to a lower number than the available system memory.
+// It will read from the HUGO_MEMORYLIMIT (in Gigabytes) environment variable.
+// If that is not set, it will set aside a quarter of the total system memory.
+func GetMemoryLimit() uint64 {
+	if mem := os.Getenv("HUGO_MEMORYLIMIT"); mem != "" {
+		if v := stringToGibabyte(mem); v > 0 {
+			return v
+		}
+
+	}
+
+	// There is a FreeMemory function, but as the kernel in most situations
+	// will take whatever memory that is left and use for caching etc.,
+	// that value is not something that we can use.
+	m := memory.TotalMemory()
+	if m != 0 {
+		return uint64(m / 4)
+	}
+
+	return 2 * gigabyte
+}
+
+func stringToGibabyte(f string) uint64 {
+	if v, err := strconv.ParseFloat(f, 32); err == nil && v > 0 {
+		return uint64(v * gigabyte)
+	}
+	return 0
+}
+
 // SetEnvVars sets vars on the form key=value in the oldVars slice.
 func SetEnvVars(oldVars *[]string, keyValues ...string) {
 	for i := 0; i < len(keyValues); i += 2 {
diff --git a/config/namespace.go b/config/namespace.go
index 3ecd01014..b518c6c01 100644
--- a/config/namespace.go
+++ b/config/namespace.go
@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -20,7 +20,6 @@ import (
 )
 
 func DecodeNamespace[S, C any](configSource any, buildConfig func(any) (C, any, error)) (*ConfigNamespace[S, C], error) {
-
 	// Calculate the hash of the input (not including any defaults applied later).
 	// This allows us to introduce new config options without breaking the hash.
 	h := identity.HashString(configSource)
diff --git a/config/namespace_test.go b/config/namespace_test.go
index 008237c13..9bd23e08e 100644
--- a/config/namespace_test.go
+++ b/config/namespace_test.go
@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -26,7 +26,7 @@ func TestNamespace(t *testing.T) {
 	c := qt.New(t)
 	c.Assert(true, qt.Equals, true)
 
-	//ns, err := config.DecodeNamespace[map[string]DocsMediaTypeConfig](in, defaultMediaTypesConfig, buildConfig)
+	// ns, err := config.DecodeNamespace[map[string]DocsMediaTypeConfig](in, defaultMediaTypesConfig, buildConfig)
 
 	ns, err := DecodeNamespace[[]*tstNsExt](
 		map[string]interface{}{"foo": "bar"},
@@ -46,23 +46,15 @@ func TestNamespace(t *testing.T) {
 	c.Assert(ns.SourceHash, qt.Equals, "14368731254619220105")
 	c.Assert(ns.Config, qt.DeepEquals, &tstNsExt{Foo: "bar"})
 	c.Assert(ns.Signature(), qt.DeepEquals, []*tstNsExt(nil))
-
 }
 
 type (
 	tstNsExt struct {
 		Foo string
 	}
-	tstNsInt struct {
-		Foo string
-	}
 )
 
 func (t *tstNsExt) Init() error {
 	t.Foo = strings.ToUpper(t.Foo)
 	return nil
 }
-func (t *tstNsInt) Compile(ext *tstNsExt) error {
-	t.Foo = ext.Foo + " qux"
-	return nil
-}
diff --git a/config/testconfig/testconfig.go b/config/testconfig/testconfig.go
index 4aafd69f0..8f70e6cb7 100644
--- a/config/testconfig/testconfig.go
+++ b/config/testconfig/testconfig.go
@@ -1,4 +1,4 @@
-// Copyright 2023 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -36,7 +36,7 @@ func GetTestConfigs(fs afero.Fs, cfg config.Provider) *allconfig.Configs {
 	// Make sure that the workingDir exists.
 	workingDir := cfg.GetString("workingDir")
 	if workingDir != "" {
-		if err := fs.MkdirAll(workingDir, 0777); err != nil {
+		if err := fs.MkdirAll(workingDir, 0o777); err != nil {
 			panic(err)
 		}
 	}
@@ -46,7 +46,6 @@ func GetTestConfigs(fs afero.Fs, cfg config.Provider) *allconfig.Configs {
 		panic(err)
 	}
 	return configs
-
 }
 
 func GetTestConfig(fs afero.Fs, cfg config.Provider) config.AllProvider {