edit_uri: fix edit URL for nested site_name

fixes backstage#127 and adds regression test for nested site_name in included project

__tests__/integration/fixtures/ok-include-path-edit-uri-nested/api/docs/index.md

@@ -0,0 +1,3 @@
+# API Documentation
+
+Some sub documentation

__tests__/integration/fixtures/ok-include-path-edit-uri-nested/api/docs/other/other.md

@@ -0,0 +1 @@
+# Other Documentation

__tests__/integration/fixtures/ok-include-path-edit-uri-nested/api/mkdocs.yml

@@ -0,0 +1,11 @@
+site_name: "test/api"
+site_description: "This is an api."
+repo_url: https://github.com/backstage/mkdocs-monorepo-plugin
+edit_uri: edit/master/__tests__/integration/fixtures/ok-include-path-edit-uri-nested/api/docs/
+
+plugins:
+  - monorepo
+
+nav:
+  - Home: index.md
+  - Other: other/other.md

__tests__/integration/fixtures/ok-include-path-edit-uri-nested/docs/index.md

@@ -0,0 +1,3 @@
+# Top Level Project Documentation
+
+Some higher level info about the project

__tests__/integration/fixtures/ok-include-path-edit-uri-nested/docs/other.md

@@ -0,0 +1 @@
+# Other Documentation

__tests__/integration/fixtures/ok-include-path-edit-uri-nested/mkdocs.yml

@@ -0,0 +1,12 @@
+site_name: "Example"
+site_description: "Description Here"
+repo_url: https://github.com/backstage/mkdocs-monorepo-plugin
+edit_uri: edit/master/__tests__/integration/fixtures/ok-include-path-edit-uri-nested/docs/
+
+plugins:
+  - monorepo
+
+nav:
+  - Home: "index.md"
+  - Other: "other.md"
+  - API: "!include api/mkdocs.yml"

__tests__/integration/test.bats

@@ -268,6 +268,15 @@ teardown() {
   assertFileContains './site/test/other/other/index.html' 'href="https://github.com/backstage/mkdocs-monorepo-plugin/edit/master/__tests__/integration/fixtures/ok-include-path-edit-uri/api/docs/other/other.md"'
 }
 
+@test "sets edit url for nested included path pages" {
+  cd ${fixturesDir}/ok-include-path-edit-uri-nested
+  assertSuccessMkdocs build
+
+  assertFileContains './site/index.html' 'href="https://github.com/backstage/mkdocs-monorepo-plugin/edit/master/__tests__/integration/fixtures/ok-include-path-edit-uri-nested/docs/index.md"'
+  assertFileContains './site/test/api/index.html' 'href="https://github.com/backstage/mkdocs-monorepo-plugin/edit/master/__tests__/integration/fixtures/ok-include-path-edit-uri-nested/api/docs/index.md"'
+  assertFileContains './site/test/api/other/other/index.html' 'href="https://github.com/backstage/mkdocs-monorepo-plugin/edit/master/__tests__/integration/fixtures/ok-include-path-edit-uri-nested/api/docs/other/other.md"'
+}
+
 @test "sets edit url for included wildcard pages" {
   cd ${fixturesDir}/ok-include-wildcard-edit-uri
   assertSuccessMkdocs build

mkdocs_monorepo_plugin/edit_uri.py

@@ -43,7 +43,7 @@ def __get_page_docs_dir(self):
     return path.relpath(abs_page_config_file_dir, abs_root_config_file_dir)
 
   def __get_page_src_path(self):
-    alias = self.page.url.split('/')[0]
+    alias = self.__get_page_dir_alias()
     path = self.page.file.src_path
     return path.replace('{}/'.format(alias), '')