Add og:url to the head section

.github/workflows/subdoc.yml

@@ -192,6 +192,7 @@ jobs:
             --project-md sus/project.md \
             --project-name Subspace \
             --project-version 0.0.0 \
+            --project-url https://suslib.cc \
             --remove-source-path-prefix $PWD \
             --add-source-path-prefix ${source_url} \
             --source-path-line-prefix L \

subdoc/lib/gen/generate_concept.cc

@@ -192,7 +192,8 @@ sus::Result<void, MarkdownToHtmlError> generate_concept(
       }
     }
     title << element.name;
-    generate_head(html, sus::move(title).str(), md_html.summary_text, options);
+    generate_head(html, sus::move(title).str(), md_html.summary_text,
+                  path.filename(), options);
   }
 
   auto body = html.open_body();

subdoc/lib/gen/generate_function.cc

@@ -267,7 +267,8 @@ sus::Result<void, MarkdownToHtmlError> generate_function(
       }
     }
     title << element.name;
-    generate_head(html, sus::move(title).str(), md_html.summary_text, options);
+    generate_head(html, sus::move(title).str(), md_html.summary_text,
+                  path.filename(), options);
   }
 
   auto body = html.open_body();

subdoc/lib/gen/generate_head.cc

@@ -18,6 +18,7 @@ namespace subdoc::gen {
 
 void generate_head(HtmlWriter& html, std::string_view title,
                    std::string_view description,
+                   const std::filesystem::path& file_path,
                    const Options& options) noexcept {
   {
     auto head = html.open_head();
@@ -46,6 +47,16 @@ void generate_head(HtmlWriter& html, std::string_view title,
       meta.add_property("og:site_name");
       meta.add_content(options.project_name);
     }
+    {
+      auto meta = head.open_meta();
+      meta.add_property("og:url");
+      if (options.project_url.is_some()) {
+        std::string url = options.project_url.as_value();
+        url += '/';
+        url += file_path.string();
+        meta.add_content(url);
+      }
+    }
 
     auto page_title = std::string(title);
     if (!page_title.empty()) {

subdoc/lib/gen/generate_head.h

@@ -23,6 +23,7 @@ namespace subdoc::gen {
 
 void generate_head(HtmlWriter& html, std::string_view title,
                    std::string_view description,
+                   const std::filesystem::path& file_path,
                    const Options& options) noexcept;
 
 }

subdoc/lib/gen/generate_macro.cc

@@ -98,7 +98,8 @@ sus::Result<void, MarkdownToHtmlError> generate_macro(
       }
     }
     title << element.name;
-    generate_head(html, sus::move(title).str(), md_html.summary_text, options);
+    generate_head(html, sus::move(title).str(), md_html.summary_text,
+                  path.filename(), options);
   }
 
   auto body = html.open_body();

subdoc/lib/gen/generate_namespace.cc

@@ -665,7 +665,7 @@ sus::Result<void, MarkdownToHtmlError> generate_namespace(
       construct_html_file_path_for_namespace(options.output_root, element);
   auto html = HtmlWriter(open_file_for_writing(path).unwrap());
   generate_head(html, namespace_display_name(element, ancestors, options),
-                md_html.summary_text, options);
+                md_html.summary_text, path.filename(), options);
 
   Vec<SortedNamespaceByName> sorted_namespaces;
   for (const auto& [key, sub_element] : element.namespaces) {

subdoc/lib/gen/generate_record.cc

@@ -480,7 +480,8 @@ sus::Result<void, MarkdownToHtmlError> generate_record(
       title << "::";
     }
     title << element.name;
-    generate_head(html, sus::move(title).str(), md_html.summary_text, options);
+    generate_head(html, sus::move(title).str(), md_html.summary_text,
+                  path.filename(), options);
   }
 
   Vec<SortedFieldByName> sorted_static_fields;

subdoc/lib/gen/options.h

@@ -54,6 +54,8 @@ struct FavIcon {
 struct Options {
   std::string project_name = "PROJECT NAME";
   std::string project_logo = "PROJECT LOGO.png";
+  /// The base url where the site will be published.
+  Option<std::string> project_url;
   /// The version string for the project. Typically a semver version such as
   /// "1.2.3" or "0.2.0-beta-4".
   Option<std::string> version_text;

subdoc/subdoc_main.cc

@@ -47,6 +47,13 @@ int main(int argc, const char** argv) {
                      "to insert into the project root"),
       llvm::cl::cat(option_category));
 
+  llvm::cl::opt<std::string> option_project_url(
+      "project-url",
+      llvm::cl::desc("The base URL where the site will be hosted, "
+                     "such as https://website.abc/here. The index page would "
+                     "be at https://website.abc/here/index.html."),
+      llvm::cl::cat(option_category));
+
   llvm::cl::opt<std::string> option_project_version(
       "project-version",
       llvm::cl::desc("A string representing the version of the project, "
@@ -276,6 +283,14 @@ int main(int argc, const char** argv) {
   if (option_project_logo.getNumOccurrences() > 0) {
     gen_options.project_logo = option_project_logo.getValue();
   }
+  if (option_project_url.getNumOccurrences() > 0) {
+    gen_options.project_url =
+        sus::some(sus::clone(option_project_url.getValue()));
+  } else {
+    fmt::println(stderr,
+                 "Warning: Missing --project-url. Without this, the og:url tag "
+                 "will be left empty.");
+  }
   if (option_project_version.getNumOccurrences() > 0) {
     gen_options.version_text =
         sus::some(sus::clone(option_project_version.getValue()));

tools/run_subdoc.bat

@@ -12,6 +12,7 @@ out\subdoc\subdoc -p out --out docs ^
     --project-md sus/project.md ^
     --project-logo logo.png ^
     --project-name Subspace ^
+    --project-url https://suslib.cc ^
     --project-version 0.1.2 ^
     --ignore-bad-code-links ^
     --remove-source-path-prefix %cd% ^

tools/run_subdoc.sh

@@ -14,6 +14,7 @@ out/subdoc/subdoc -p out --out docs \
     --project-md sus/project.md \
     --project-logo logo.png \
     --project-name Subspace \
+    --project-url https://suslib.cc \
     --project-version 0.1.2 \
     --ignore-bad-code-links \
     --remove-source-path-prefix $PWD \