Create a struct with all of Hugo's config options

Primary motivation is documentation, but it will also hopefully simplify the code.

Also,

* Lower case the default output format names; this is in line with the custom ones (map keys) and how
it's treated all the places. This avoids doing `stringds.EqualFold` everywhere.

Closes #10896
Closes #10620

5 files changed, 49 insertions, 87 deletions

diff --git a/source/content_directory_test.go b/source/content_directory_test.go
index 4d800cb5a..7d1630529 100644
--- a/source/content_directory_test.go
+++ b/source/content_directory_test.go
@@ -1,4 +1,4 @@
-// Copyright 2015 The Hugo Authors. All rights reserved.
+// Copyright 2023 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.
@@ -11,13 +11,18 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package source
+package source_test
 
 import (
+	"fmt"
 	"path/filepath"
 	"testing"
 
+	"github.com/gohugoio/hugo/config"
+	"github.com/gohugoio/hugo/config/testconfig"
 	"github.com/gohugoio/hugo/helpers"
+	"github.com/gohugoio/hugo/source"
+	"github.com/spf13/afero"
 
 	qt "github.com/frankban/quicktest"
 	"github.com/gohugoio/hugo/hugofs"
@@ -45,22 +50,30 @@ func TestIgnoreDotFilesAndDirectories(t *testing.T) {
 		{"foobar/foo.md", true, []string{"\\.md$", "\\.boo$"}},
 		{"foobar/foo.html", false, []string{"\\.md$", "\\.boo$"}},
 		{"foobar/foo.md", true, []string{"foo.md$"}},
-		{"foobar/foo.md", true, []string{"*", "\\.md$", "\\.boo$"}},
+		{"foobar/foo.md", true, []string{".*", "\\.md$", "\\.boo$"}},
 		{"foobar/.#content.md", true, []string{"/\\.#"}},
 		{".#foobar.md", true, []string{"^\\.#"}},
 	}
 
 	for i, test := range tests {
-		v := newTestConfig()
-		v.Set("ignoreFiles", test.ignoreFilesRegexpes)
-		fs := hugofs.NewMem(v)
-		ps, err := helpers.NewPathSpec(fs, v, nil)
-		c.Assert(err, qt.IsNil)
+		test := test
+		c.Run(fmt.Sprintf("[%d] %s", i, test.path), func(c *qt.C) {
+			c.Parallel()
+			v := config.New()
+			v.Set("ignoreFiles", test.ignoreFilesRegexpes)
+			v.Set("publishDir", "public")
+			afs := afero.NewMemMapFs()
+			conf := testconfig.GetTestConfig(afs, v)
+			fs := hugofs.NewFromOld(afs, v)
+			ps, err := helpers.NewPathSpec(fs, conf, nil)
+			c.Assert(err, qt.IsNil)
 
-		s := NewSourceSpec(ps, nil, fs.Source)
+			s := source.NewSourceSpec(ps, nil, fs.Source)
+
+			if ignored := s.IgnoreFile(filepath.FromSlash(test.path)); test.ignore != ignored {
+				t.Errorf("[%d] File not ignored", i)
+			}
+		})
 
-		if ignored := s.IgnoreFile(filepath.FromSlash(test.path)); test.ignore != ignored {
-			t.Errorf("[%d] File not ignored", i)
-		}
 	}
 }
diff --git a/source/fileInfo.go b/source/fileInfo.go
index 618498add..c58a0c3b9 100644
--- a/source/fileInfo.go
+++ b/source/fileInfo.go
@@ -96,6 +96,7 @@ type FileWithoutOverlap interface {
 	// Hugo content files being one of them, considered to be unique.
 	UniqueID() string
 
+	// For internal use only.
 	FileInfo() hugofs.FileMetaInfo
 }
 
@@ -182,6 +183,7 @@ func (fi *FileInfo) UniqueID() string {
 }
 
 // FileInfo returns a file's underlying os.FileInfo.
+// For internal use only.
 func (fi *FileInfo) FileInfo() hugofs.FileMetaInfo { return fi.fi }
 
 func (fi *FileInfo) String() string { return fi.BaseFileName() }
diff --git a/source/fileInfo_test.go b/source/fileInfo_test.go
index b8bb33cd3..e2a3edd30 100644
--- a/source/fileInfo_test.go
+++ b/source/fileInfo_test.go
@@ -11,7 +11,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package source
+package source_test
 
 import (
 	"path/filepath"
@@ -19,6 +19,7 @@ import (
 	"testing"
 
 	qt "github.com/frankban/quicktest"
+	"github.com/gohugoio/hugo/source"
 )
 
 func TestFileInfo(t *testing.T) {
@@ -29,9 +30,9 @@ func TestFileInfo(t *testing.T) {
 	for _, this := range []struct {
 		base     string
 		filename string
-		assert   func(f *FileInfo)
+		assert   func(f *source.FileInfo)
 	}{
-		{filepath.FromSlash("/a/"), filepath.FromSlash("/a/b/page.md"), func(f *FileInfo) {
+		{filepath.FromSlash("/a/"), filepath.FromSlash("/a/b/page.md"), func(f *source.FileInfo) {
 			c.Assert(f.Filename(), qt.Equals, filepath.FromSlash("/a/b/page.md"))
 			c.Assert(f.Dir(), qt.Equals, filepath.FromSlash("b/"))
 			c.Assert(f.Path(), qt.Equals, filepath.FromSlash("b/page.md"))
@@ -39,10 +40,10 @@ func TestFileInfo(t *testing.T) {
 			c.Assert(f.TranslationBaseName(), qt.Equals, filepath.FromSlash("page"))
 			c.Assert(f.BaseFileName(), qt.Equals, filepath.FromSlash("page"))
 		}},
-		{filepath.FromSlash("/a/"), filepath.FromSlash("/a/b/c/d/page.md"), func(f *FileInfo) {
+		{filepath.FromSlash("/a/"), filepath.FromSlash("/a/b/c/d/page.md"), func(f *source.FileInfo) {
 			c.Assert(f.Section(), qt.Equals, "b")
 		}},
-		{filepath.FromSlash("/a/"), filepath.FromSlash("/a/b/page.en.MD"), func(f *FileInfo) {
+		{filepath.FromSlash("/a/"), filepath.FromSlash("/a/b/page.en.MD"), func(f *source.FileInfo) {
 			c.Assert(f.Section(), qt.Equals, "b")
 			c.Assert(f.Path(), qt.Equals, filepath.FromSlash("b/page.en.MD"))
 			c.Assert(f.TranslationBaseName(), qt.Equals, filepath.FromSlash("page"))
diff --git a/source/filesystem_test.go b/source/filesystem_test.go
index 31e3bdd70..1067d5839 100644
--- a/source/filesystem_test.go
+++ b/source/filesystem_test.go
@@ -1,4 +1,4 @@
-// Copyright 2015 The Hugo Authors. All rights reserved.
+// Copyright 2023 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.
@@ -11,7 +11,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package source
+package source_test
 
 import (
 	"fmt"
@@ -19,17 +19,14 @@ import (
 	"runtime"
 	"testing"
 
-	"github.com/gohugoio/hugo/config"
-
-	"github.com/gohugoio/hugo/modules"
-
-	"github.com/gohugoio/hugo/langs"
-
 	"github.com/spf13/afero"
 
 	qt "github.com/frankban/quicktest"
+	"github.com/gohugoio/hugo/config"
+	"github.com/gohugoio/hugo/config/testconfig"
 	"github.com/gohugoio/hugo/helpers"
 	"github.com/gohugoio/hugo/hugofs"
+	"github.com/gohugoio/hugo/source"
 )
 
 func TestEmptySourceFilesystem(t *testing.T) {
@@ -60,13 +57,11 @@ func TestUnicodeNorm(t *testing.T) {
 	}
 
 	ss := newTestSourceSpec()
-	fi := hugofs.NewFileMetaInfo(nil, hugofs.NewFileMeta())
 
 	for i, path := range paths {
 		base := fmt.Sprintf("base%d", i)
 		c.Assert(afero.WriteFile(ss.Fs.Source, filepath.Join(base, path.NFD), []byte("some data"), 0777), qt.IsNil)
 		src := ss.NewFilesystem(base)
-		_ = src.add(path.NFD, fi)
 		files, err := src.Files()
 		c.Assert(err, qt.IsNil)
 		f := files[0]
@@ -76,27 +71,14 @@ func TestUnicodeNorm(t *testing.T) {
 	}
 }
 
-func newTestConfig() config.Provider {
-	v := config.NewWithTestDefaults()
-	_, err := langs.LoadLanguageSettings(v, nil)
-	if err != nil {
-		panic(err)
-	}
-	mod, err := modules.CreateProjectModule(v)
-	if err != nil {
-		panic(err)
-	}
-	v.Set("allModules", modules.Modules{mod})
-
-	return v
-}
-
-func newTestSourceSpec() *SourceSpec {
-	v := newTestConfig()
-	fs := hugofs.NewFrom(hugofs.NewBaseFileDecorator(afero.NewMemMapFs()), v)
-	ps, err := helpers.NewPathSpec(fs, v, nil)
+func newTestSourceSpec() *source.SourceSpec {
+	v := config.New()
+	afs := hugofs.NewBaseFileDecorator(afero.NewMemMapFs())
+	conf := testconfig.GetTestConfig(afs, v)
+	fs := hugofs.NewFrom(afs, conf.BaseConfig())
+	ps, err := helpers.NewPathSpec(fs, conf, nil)
 	if err != nil {
 		panic(err)
 	}
-	return NewSourceSpec(ps, nil, fs.Source)
+	return source.NewSourceSpec(ps, nil, fs.Source)
 }
diff --git a/source/sourceSpec.go b/source/sourceSpec.go
index 954167f28..dc44994a8 100644
--- a/source/sourceSpec.go
+++ b/source/sourceSpec.go
@@ -17,16 +17,13 @@ package source
 import (
 	"os"
 	"path/filepath"
-	"regexp"
 	"runtime"
 
 	"github.com/gohugoio/hugo/hugofs/glob"
 
-	"github.com/gohugoio/hugo/langs"
 	"github.com/spf13/afero"
 
 	"github.com/gohugoio/hugo/helpers"
-	"github.com/spf13/cast"
 )
 
 // SourceSpec abstracts language-specific file creation.
@@ -37,56 +34,23 @@ type SourceSpec struct {
 	SourceFs afero.Fs
 
 	shouldInclude func(filename string) bool
-
-	Languages              map[string]any
-	DefaultContentLanguage string
-	DisabledLanguages      map[string]bool
 }
 
 // NewSourceSpec initializes SourceSpec using languages the given filesystem and PathSpec.
 func NewSourceSpec(ps *helpers.PathSpec, inclusionFilter *glob.FilenameFilter, fs afero.Fs) *SourceSpec {
-	cfg := ps.Cfg
-	defaultLang := cfg.GetString("defaultContentLanguage")
-	languages := cfg.GetStringMap("languages")
-
-	disabledLangsSet := make(map[string]bool)
-
-	for _, disabledLang := range cfg.GetStringSlice("disableLanguages") {
-		disabledLangsSet[disabledLang] = true
-	}
 
-	if len(languages) == 0 {
-		l := langs.NewDefaultLanguage(cfg)
-		languages[l.Lang] = l
-		defaultLang = l.Lang
-	}
-
-	ignoreFiles := cast.ToStringSlice(cfg.Get("ignoreFiles"))
-	var regexps []*regexp.Regexp
-	if len(ignoreFiles) > 0 {
-		for _, ignorePattern := range ignoreFiles {
-			re, err := regexp.Compile(ignorePattern)
-			if err != nil {
-				helpers.DistinctErrorLog.Printf("Invalid regexp %q in ignoreFiles: %s", ignorePattern, err)
-			} else {
-				regexps = append(regexps, re)
-			}
-
-		}
-	}
 	shouldInclude := func(filename string) bool {
 		if !inclusionFilter.Match(filename, false) {
 			return false
 		}
-		for _, r := range regexps {
-			if r.MatchString(filename) {
-				return false
-			}
+		if ps.Cfg.IgnoreFile(filename) {
+			return false
 		}
+
 		return true
 	}
 
-	return &SourceSpec{shouldInclude: shouldInclude, PathSpec: ps, SourceFs: fs, Languages: languages, DefaultContentLanguage: defaultLang, DisabledLanguages: disabledLangsSet}
+	return &SourceSpec{shouldInclude: shouldInclude, PathSpec: ps, SourceFs: fs}
 }
 
 // IgnoreFile returns whether a given file should be ignored.