[clang-tools-extra] reapply [clang-doc] Add --asset option to clang-doc (PR #96358)

[Nico Weber via cfe-commits]

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@@ -182,23 +258,9 @@ Example usage for a project using a compile commands database:
       {"index.js", "index_json.js"}};
 
   if (Format == "html") {
-    void *MainAddr = (void *)(intptr_t)GetExecutablePath;
-    std::string ClangDocPath = GetExecutablePath(argv[0], MainAddr);
-    llvm::SmallString<128> NativeClangDocPath;
-    llvm::sys::path::native(ClangDocPath, NativeClangDocPath);
-    llvm::SmallString<128> AssetsPath;
-    AssetsPath = llvm::sys::path::parent_path(NativeClangDocPath);
-    llvm::sys::path::append(AssetsPath, "..", "share", "clang");
-    llvm::SmallString<128> DefaultStylesheet;
-    llvm::sys::path::native(AssetsPath, DefaultStylesheet);
-    llvm::sys::path::append(DefaultStylesheet,
-                            "clang-doc-default-stylesheet.css");
-    llvm::SmallString<128> IndexJS;
-    llvm::sys::path::native(AssetsPath, IndexJS);
-    llvm::sys::path::append(IndexJS, "index.js");
-    CDCtx.UserStylesheets.insert(CDCtx.UserStylesheets.begin(),
-                                 std::string(DefaultStylesheet));
-    CDCtx.FilesToCopy.emplace_back(IndexJS.str());
+    if (auto Err = getHtmlAssetFiles(argv[0], CDCtx)) {
+      llvm::outs() << "warning: " <<  toString(std::move(Err)) << "\n";
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nico wrote:

Since errors lead to early returns (and hence behavior differences), they should probably cause an actual error return code instead of just a warning?

https://github.com/llvm/llvm-project/pull/96358