Revert "[clang-doc] Add --asset option to clang-doc" (llvm#96354)

Reverts llvm#94717

This breaks on some buildbots:
http://45.33.8.238/linux/141118/step_7.txt

clang-tools-extra/clang-doc/tool/ClangDocMain.cpp

@@ -81,12 +81,6 @@ static llvm::cl::list<std::string> UserStylesheets(
     llvm::cl::desc("CSS stylesheets to extend the default styles."),
     llvm::cl::cat(ClangDocCategory));
 
-static llvm::cl::opt<std::string> UserAssetPath(
-    "asset",
-    llvm::cl::desc("User supplied asset path to "
-                   "override the default css and js files for html output"),
-    llvm::cl::cat(ClangDocCategory));
-
 static llvm::cl::opt<std::string> SourceRoot("source-root", llvm::cl::desc(R"(
 Directory where processed files are stored.
 Links to definition locations will only be
@@ -133,86 +127,16 @@ std::string getFormatString() {
 // GetMainExecutable (since some platforms don't support taking the
 // address of main, and some platforms can't implement GetMainExecutable
 // without being given the address of a function in the main executable).
-std::string getExecutablePath(const char *Argv0, void *MainAddr) {
+std::string GetExecutablePath(const char *Argv0, void *MainAddr) {
   return llvm::sys::fs::getMainExecutable(Argv0, MainAddr);
 }
 
-llvm::Error getAssetFiles(clang::doc::ClangDocContext &CDCtx) {
-  using DirIt = llvm::sys::fs::directory_iterator;
-  std::error_code FileErr;
-  llvm::SmallString<128> FilePath(UserAssetPath);
-  for (DirIt DirStart = DirIt(UserAssetPath, FileErr),
-                   DirEnd;
-       !FileErr && DirStart != DirEnd; DirStart.increment(FileErr)) {
-    FilePath = DirStart->path();
-    if (llvm::sys::fs::is_regular_file(FilePath)) {
-      if (llvm::sys::path::extension(FilePath) == ".css")
-        CDCtx.UserStylesheets.insert(CDCtx.UserStylesheets.begin(),
-                                     std::string(FilePath));
-      else if (llvm::sys::path::extension(FilePath) == ".js")
-        CDCtx.FilesToCopy.emplace_back(FilePath.str());
-    }
-  }
-  if (FileErr)
-    return llvm::createFileError(FilePath, FileErr);
-  return llvm::Error::success();
-}
-
-llvm::Error getDefaultAssetFiles(const char *Argv0,
-                                 clang::doc::ClangDocContext &CDCtx) {
-  void *MainAddr = (void *)(intptr_t)getExecutablePath;
-  std::string ClangDocPath = getExecutablePath(Argv0, 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");
-
-  llvm::outs() << "Using default asset: " << AssetsPath << "\n";
-
-  if (!llvm::sys::fs::is_regular_file(IndexJS))
-    return llvm::createStringError(llvm::inconvertibleErrorCode(),
-                                   "default index.js file missing at " +
-                                       IndexJS + "\n");
-
-  if (!llvm::sys::fs::is_regular_file(DefaultStylesheet))
-    return llvm::createStringError(
-        llvm::inconvertibleErrorCode(),
-        "default clang-doc-default-stylesheet.css file missing at " +
-            DefaultStylesheet + "\n");
-
-  CDCtx.UserStylesheets.insert(CDCtx.UserStylesheets.begin(),
-                               std::string(DefaultStylesheet));
-  CDCtx.FilesToCopy.emplace_back(IndexJS.str());
-
-  return llvm::Error::success();
-}
-
-llvm::Error getHtmlAssetFiles(const char *Argv0,
-                              clang::doc::ClangDocContext &CDCtx) {
-  if (!UserAssetPath.empty() &&
-      !llvm::sys::fs::is_directory(std::string(UserAssetPath)))
-    llvm::outs() << "Asset path supply is not a directory: " << UserAssetPath
-                 << " falling back to default\n";
-  if (llvm::sys::fs::is_directory(std::string(UserAssetPath)))
-    return getAssetFiles(CDCtx);
-  return getDefaultAssetFiles(Argv0, CDCtx);
-}
-
 int main(int argc, const char **argv) {
   llvm::sys::PrintStackTraceOnErrorSignal(argv[0]);
   std::error_code OK;
 
   const char *Overview =
-      R"(Generates documentation from source code and comments.
+    R"(Generates documentation from source code and comments.
 
 Example usage for files without flags (default):
 
@@ -258,9 +182,23 @@ Example usage for a project using a compile commands database:
       {"index.js", "index_json.js"}};
 
   if (Format == "html") {
-    if (auto Err = getHtmlAssetFiles(argv[0], CDCtx)) {
-      llvm::outs() << "warning: " <<  toString(std::move(Err)) << "\n";
-    }
+    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());
   }
 
   // Mapping phase