[clang-rename] add documentation

clang-rename needs at least to have a minimum documentation to provide a
small introduction for new users

Patch by Kirill Bobyrev!

Differential Revision: http://reviews.llvm.org/D22129

llvm-svn: 275388

clang-tools-extra/docs/clang-rename.rst

@@ -0,0 +1,99 @@
+============
+Clang-Rename
+============
+
+.. contents::
+
+See also:
+
+.. toctree::
+   :maxdepth: 1
+
+
+:program:`clang-rename` is a clang-based C++ "linter" tool. Its purpose is to
+perform efficient renaming actions in large-scale projects such as renaming
+classes, functions, variables, arguments, namespaces etc.
+
+The tool is in a very early development stage, so you might encounter bugs and
+crashes. Submitting reports with information about how to reproduce the issue
+to `the LLVM bugtracker <https://llvm.org/bugs>`_ will definitely help the
+project. If you have any ideas or suggestions, you might want to put a feature
+request there.
+
+Using clang-rename
+==================
+
+:program:`clang-rename` is a `LibTooling
+<http://clang.llvm.org/docs/LibTooling.html>`_-based tool, and it's easier to
+work with if you set up a compile command database for your project (for an
+example of how to do this see `How To Setup Tooling For LLVM
+<http://clang.llvm.org/docs/HowToSetupToolingForLLVM.html>`_). You can also
+specify compilation options on the command line after ``--``:
+
+.. code-block:: console
+
+  $ clang-rename -offset=42 -new-name=foo test.cpp -- -Imy_project/include -DMY_DEFINES ...
+
+
+To get an offset of a symbol in a file run
+
+.. code-block:: console
+
+  $ grep -FUbo 'foo' file.cpp
+
+
+The tool currently supports renaming actions inside a single Translation Unit
+only. It is planned to extend the tool's functionality to support multi-TU
+renaming actions in the future.
+
+:program:`clang-rename` also aims to be easily integrated into popular text
+editors, such as Vim, and improve the workflow of users.
+
+Although a command line interface exists, it is highly recommended to use the
+text editor interface instead for better experience.
+
+.. code-block:: console
+
+  $ clang-rename -help
+  OVERVIEW: A tool to rename symbols in C/C++ code.
+  clang-rename renames every occurrence of a symbol found at <offset> in
+  <source0>. If -i is specified, the edited files are overwritten to disk.
+  Otherwise, the results are written to stdout.
+
+  USAGE: clang-rename [subcommand] [options] <source0> [... <sourceN>]
+
+  OPTIONS:
+
+  Clang-rename options:
+
+    -export-fixes=<filename>   - YAML file to store suggested fixes in.
+    -extra-arg=<string>        - Additional argument to append to the compiler command line
+    -extra-arg-before=<string> - Additional argument to prepend to the compiler command line
+    -i                         - Overwrite edited <file>s.
+    -new-name=<string>         - The new name to change the symbol to.
+    -offset=<uint>             - Locates the symbol by offset as opposed to <line>:<column>.
+    -old-name=<string>         - The fully qualified name of the symbol, if -offset is not used.
+    -p=<string>                - Build path
+    -pl                        - Print the locations affected by renaming to stderr.
+    -pn                        - Print the found symbol's name prior to renaming to stderr.
+
+  Generic Options:
+
+    -help                      - Display available options (-help-hidden for more)
+    -help-list                 - Display list of available options (-help-list-hidden for more)
+    -version                   - Display the version of this program
+
+
+clang-rename Vim integration
+============================
+
+You can call :program:`clang-rename` directly from Vim! To set up
+:program:`clang-rename` integration for Vim see
+`clang-rename/tool/clang-rename.py
+<http://reviews.llvm.org/diffusion/L/browse/clang-tools-extra/trunk/clang-rename/tool/clang-rename.py>`_.
+
+Once installed, you can point your cursor to the symbols you want to rename,
+press `,cr` and print new desired name.
+
+Please note that **you have to save all buffers, in which the replacement will
+happen before running the tool**.

clang-tools-extra/docs/index.rst

@@ -24,6 +24,7 @@ Contents
    include-fixer
    modularize
    pp-trace
+   clang-rename
 
 
 Doxygen Documentation