markup/asciidocext: Fix the outdir document attribute

Changes:

- Unescape the outdir attribute to handle multibyte content paths
- Retain the language prefix with multilingual sites

Closes #9202
Closes #10473

Author: jmooring

markup/asciidocext/asciidoc_integration_test.go

@@ -0,0 +1,134 @@
+// Copyright 2025 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.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package asciidocext converts AsciiDoc to HTML using Asciidoctor
+// external binary. The `asciidoc` module is reserved for a future golang
+// implementation.
+
+package asciidocext_test
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+
+	"github.com/gohugoio/hugo/hugolib"
+	"github.com/gohugoio/hugo/markup/asciidocext"
+)
+
+// Issue 9202
+func TestAsciidoctorMultibyteOutdir(t *testing.T) {
+	if !asciidocext.Supports() {
+		t.Skip("skip asciidoc")
+	}
+
+	files := `
+-- hugo.toml --
+disableKinds = ['home','rss','section','sitemap','taxonomy','term']
+
+[markup.asciidocext]
+workingFolderCurrent = true
+
+[security.exec]
+allow = ['^asciidoctor$']
+-- content/p1.adoc --
+---
+title: p1
+---
+H~2~O
+-- content/hügo.adoc --
+---
+title: hügo
+---
+H~2~O
+-- layouts/all.html --
+{{ .Content }}
+`
+
+	b, err := hugolib.TestE(t, files, hugolib.TestOptInfo())
+	if err != nil {
+		fmt.Println(err.Error())
+	}
+
+	wantContent := "<p>H<sub>2</sub>O</p>"
+
+	b.AssertFileContent("public/p1/index.html", wantContent)
+	b.AssertFileContent("public/hügo/index.html", wantContent)
+	b.AssertLogContains("/public/p1")
+	b.AssertLogContains("/public/hügo")
+}
+
+// Issue 10473
+func TestAsciidoctorMultilingualOutdir(t *testing.T) {
+	if !asciidocext.Supports() {
+		t.Skip("skip asciidoc")
+	}
+
+	files := `
+-- hugo.toml --
+disableKinds = ['home','rss','section','sitemap','taxonomy','term']
+
+defaultContentLanguage = 'en'
+defaultContentLanguageInSubdir = true
+
+[languages.en]
+weight = 1
+BASEURL_EN
+
+[languages.de]
+weight = 2
+BASEURL_DE
+
+[markup.asciidocExt]
+workingFolderCurrent = true
+
+[security.exec]
+allow = ['^asciidoctor$']
+-- content/p1.en.adoc --
+---
+title: p1 (en)
+---
+H~2~O
+-- content/p1.de.adoc --
+---
+title: p1 (de)
+---
+H~2~O
+-- layouts/all.html --
+{{ .Content }}
+`
+
+	wantContent := "<p>H<sub>2</sub>O</p>"
+
+	// multilingual single-host
+	f := strings.ReplaceAll(files, "BASEURL_EN", "")
+	f = strings.ReplaceAll(f, "BASEURL_DE", "")
+
+	b := hugolib.Test(t, f, hugolib.TestOptInfo())
+
+	b.AssertFileContent("public/en/p1/index.html", wantContent)
+	b.AssertFileContent("public/de/p1/index.html", wantContent)
+	b.AssertLogContains("/public/en/p1")
+	b.AssertLogContains("/public/de/p1")
+
+	// multilingual multi-host
+	f = strings.ReplaceAll(files, "BASEURL_EN", "baseURL = 'https://en.example.org/'")
+	f = strings.ReplaceAll(f, "BASEURL_DE", "baseURL = 'https://de.example.org/'")
+
+	b = hugolib.Test(t, f, hugolib.TestOptInfo())
+
+	b.AssertFileContent("public/en/p1/index.html", wantContent)
+	b.AssertFileContent("public/de/p1/index.html", wantContent)
+	// b.AssertLogContains("/public/en/p1") // JMM fail: outdir contains /public/p1 (missing language prefix)
+	// b.AssertLogContains("/public/de/p1") // JMM fail: outdir contains /public/p1 (missing language prefix)
+}

markup/asciidocext/internal/converter.go

@@ -2,6 +2,7 @@ package internal
 
 import (
 	"bytes"
+	"net/url"
 	"path/filepath"
 	"strings"
 
@@ -110,7 +111,10 @@ func (a *AsciidocConverter) ParseArgs(ctx converter.DocumentContext) []string {
 			postDir := ""
 			page, ok := ctx.Document.(pageSubset)
 			if ok {
-				postDir = filepath.Base(page.RelPermalink())
+				postDir, err = url.PathUnescape(page.RelPermalink())
+				if err != nil {
+					a.Cfg.Logger.Errorln("unable to unescape the relative permalink")
+				}
 			} else {
 				a.Cfg.Logger.Errorln("unable to cast interface to pageSubset")
 			}