Fix for data mounts in sub folders

Before this change, data files from Hugo modules were always mounted at the
root of the `data` directory. The File and FileMetaInfo structs for modules
are different from 'native' data directories.

This changes how the keyParts for data files are generated so that data
from modules or native directories are treated the same.

1 files changed, 29 insertions, 0 deletions

diff --git a/hugolib/hugo_modules_test.go b/hugolib/hugo_modules_test.go
index 3353f508e..88a0c3ec6 100644
--- a/hugolib/hugo_modules_test.go
+++ b/hugolib/hugo_modules_test.go
@@ -1178,3 +1178,32 @@ target = "content/resources-b"
 	b.AssertFileContent("public/resources-a/subdir/about/index.html", "Single")
 	b.AssertFileContent("public/resources-b/subdir/about/index.html", "Single")
 }
+
+func TestMountData(t *testing.T) {
+	files := `
+-- hugo.toml --
+baseURL = 'https://example.org/'
+disableKinds = ["taxonomy", "term", "RSS", "sitemap", "robotsTXT", "page", "section"]
+
+[[module.mounts]]
+source = "data"
+target = "data"
+
+[[module.mounts]]
+source = "extra-data"
+target = "data/extra"
+-- extra-data/test.yaml --
+message: Hugo Rocks
+-- layouts/index.html --
+{{ site.Data.extra.test.message }}
+`
+
+	b := NewIntegrationTestBuilder(
+		IntegrationTestConfig{
+			T:           t,
+			TxtarString: files,
+		},
+	).Build()
+
+	b.AssertFileContent("public/index.html", "Hugo Rocks")
+}