commands: Fix import from Jekyll

- Look for _config.yml, _config.yaml, or _config.toml
- Fix theme submodule URL
- Fix config filename in the instructions
- Add tests

Closes #14795
Closes #14906

commands/import.go

@@ -466,41 +466,48 @@ func (c *importCommand) importFromJekyll(args []string) error {
 	c.r.Println("Now, start Hugo by yourself:")
 	c.r.Println("cd " + args[1])
 	c.r.Println("git init")
-	c.r.Println("git submodule add https://github.com/theNewDynamic/gohugo-theme-ananke themes/ananke")
-	c.r.Println("echo \"theme = 'ananke'\" > hugo.toml")
+	c.r.Println("git submodule add https://github.com/gohugo-ananke/ananke themes/ananke")
+	c.r.Println("echo \"theme: ananke\" >> hugo.yaml")
 	c.r.Println("hugo server")
 
 	return nil
 }
 
 func (c *importCommand) loadJekyllConfig(fs afero.Fs, jekyllRoot string) map[string]any {
-	path := filepath.Join(jekyllRoot, "_config.yml")
+	for _, candidate := range []struct {
+		filename string
+		format   metadecoders.Format
+	}{
+		{"_config.yml", metadecoders.YAML},
+		{"_config.yaml", metadecoders.YAML},
+		{"_config.toml", metadecoders.TOML},
+	} {
+		path := filepath.Join(jekyllRoot, candidate.filename)
+		exists, err := helpers.Exists(path, fs)
+		if err != nil || !exists {
+			continue
+		}
 
-	exists, err := helpers.Exists(path, fs)
+		f, err := fs.Open(path)
+		if err != nil {
+			continue
+		}
+		b, err := io.ReadAll(f)
+		f.Close()
+		if err != nil {
+			continue
+		}
 
-	if err != nil || !exists {
-		c.r.Println("_config.yaml not found: Is the specified Jekyll root correct?")
-		return nil
+		m, err := metadecoders.Default.UnmarshalToMap(b, candidate.format)
+		if err != nil {
+			continue
+		}
+
+		return m
 	}
 
-	f, err := fs.Open(path)
-	if err != nil {
-		return nil
-	}
-
-	defer f.Close()
-
-	b, err := io.ReadAll(f)
-	if err != nil {
-		return nil
-	}
-
-	m, err := metadecoders.Default.UnmarshalToMap(b, metadecoders.YAML)
-	if err != nil {
-		return nil
-	}
-
-	return m
+	c.r.Println("no config file (_config.yml, _config.yaml, or _config.toml) found: is the specified Jekyll root correct?")
+	return nil
 }
 
 func (c *importCommand) parseJekyllFilename(filename string) (time.Time, string, error) {

testscripts/commands/import_jekyll.txt

@@ -6,12 +6,55 @@ stdout 'Import a project from another system'
 hugo import jekyll -h
 stdout 'hugo import from Jekyll\.'
 
-hugo import jekyll my-jekyll-project my-hugo-project
-checkfilecount 1 my-hugo-project/content/post
-grep 'example\.org' my-hugo-project/hugo.yaml
+# No config file
+hugo import jekyll jekyll-no-config hugo-no-config
+checkfilecount 1 hugo-no-config/content/post
+grep 'example\.org' hugo-no-config/hugo.yaml
 
-# A simple Jekyll project.
--- my-jekyll-project/_posts/2012-01-18-hello-world.markdown --
+# Has _config.yml file
+hugo import jekyll jekyll-yml hugo-yml
+checkfilecount 1 hugo-yml/content/post
+grep 'https://yml\.example\.org/' hugo-yml/hugo.yaml
+
+# Has _config.yaml file
+hugo import jekyll jekyll-yaml hugo-yaml
+checkfilecount 1 hugo-yaml/content/post
+grep 'https://yaml\.example\.org/' hugo-yaml/hugo.yaml
+
+# Has _config.toml file
+hugo import jekyll jekyll-toml hugo-toml
+checkfilecount 1 hugo-toml/content/post
+grep 'https://toml\.example\.org/' hugo-toml/hugo.yaml
+
+# Jekyll projects used by the tests above.
+-- jekyll-no-config/_posts/2012-01-18-hello-world.markdown --
+---
+layout: post
+title: "Hello World"
+---
+Hello world!
+-- jekyll-yml/_config.yml --
+title: "Jekyll YML Site"
+url: "https://yml.example.org/"
+-- jekyll-yml/_posts/2012-01-18-hello-world.markdown --
+---
+layout: post
+title: "Hello World"
+---
+Hello world!
+-- jekyll-yaml/_config.yaml --
+title: "Jekyll YAML Site"
+url: "https://yaml.example.org/"
+-- jekyll-yaml/_posts/2012-01-18-hello-world.markdown --
+---
+layout: post
+title: "Hello World"
+---
+Hello world!
+-- jekyll-toml/_config.toml --
+title = "Jekyll TOML Site"
+url = "https://toml.example.org/"
+-- jekyll-toml/_posts/2012-01-18-hello-world.markdown --
 ---
 layout: post
 title: "Hello World"