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Rtags ac-rtags company-rtags flycheck-rtags helm-rtags ivy-rtags Introduction RTags is a client/server application that indexes C/C code and keeps a persistent file-based database of references, declarations, definitions, symbolnames etc. There’s also limited support for ObjC/ObjC. It allows you to find symbols by name (including nested class and namespace scope).

Most importantly we give you proper follow-symbol and find-references support. We also have neat little things like rename-symbol, integration with clang’s “fixits”. We also integrate with flymake using clang’s vastly superior errors and warnings. Since RTags constantly will reindex “dirty” files you get live updates of compiler errors and warnings. Since we already know how to compile your sources we have a way to quickly bring up the preprocessed output of the current source file in a buffer. While existing taggers like gnu global, cscope, etags, ctags etc do a decent job for C they often fall a little bit short for C.

With its incredible lexical complexity, parsing C is an incredibly hard task and we make no bones about the fact that the only reason we are able to improve on the current tools is because of clang. RTags is named RTags in recognition of Roberto Raggi on whose C parser we intended to base this project but he assured us clang was the way to go. The name stuck though. TLDR Quickstart Build RTags. Emacs +73:34 src/rdm.cpp Load rtags.el M-: (load-file 'rtags.el') RET Ensure rc can be found M-x set-variable RET rtags-path RET './bin' RET Call rtags-find-symbol-at-point M-x rtags-find-symbol-at-point RET Your location is now on the definition of Server::instance Installing RTags Prerequisites There are a few prerequisites you need to have in order to build RTags. LLVM/Clang = 3.3 On Linux you may be able to use your distribution package manager to install this.

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On OS X you can use Homebrew or possibly other package managers, though see below for details if you plan to tag projects that use C11 features (such as RTags itself). Alternatively you can grab the sources from and build it yourself. GCC/Clang = 4.9/3.3 A modern compiler to build RTags. RTags makes extensive use of C11 features such as variadic templates and threading utility classes from the C standard library.

cmake = 2.8 The meta-built system used by RTags. emacs = 24.3 is recommended RTags might very well work with much older emacs versions but the oldest version we have tested with is 24.3. There’s no particular effort made to support older versions, but patches that make it work are welcome. Having said that, completion (, ) as well as integration only works, and has been tested with emacs = 24.3. NOTE: Emacs is no real prerequisite. That implies you can compile RTags without emacs installed.

Might be your answer. Registax 6 for mac. At least it is available for the Mac and handles stacking of images (also into EXR-format), masking and distortion-correction of images.

This may be of interest to you, if you want use RTags as back-end for a different editor like vim, see section. You explicitly can tell cmake to ignore the elisp files by passing -DRTAGSNOELISPFILES=1 to cmake. Optional. pkg-config and bash-completion RTags comes with bash completion support. If you want the bash completion files to be installed, you either have to make sure that pkg-config and bash-completion package is installed or you can manually force the installation by setting the variable FORCEBASHCOMPLETIONINSTALLATION to TRUE or ON. The default installation path is CMAKEINSTALLPREFIX/share/bash-completion/completions. You can adjust the path with the cmake variable BASHCOMPLETIONCOMPLETIONSDIR variable.

However, if the bash completions files are not installed in the default completion path, i.e. /usr/share/bash-completion/completions on GNU/Linux, you have to make sure the RTags bash completion file gets sourced to get completion support.

lua version = 5.3 TODO(Andersbakken): Add some notes why we optionally require Lua, whats the purpose of it. If your system does not provide a suitable version you can download Lua from. We recommend downloading the pre-built binaries. If you have compiled Lua from scratch (the build will only create an archive liblua.a and no shared library) or you have installed the headers/library to a non standard place you need to tell cmake where the headers/library is located. M-: (rtags-install nil '-DLIBCLANGLLVMCONFIGEXECUTABLE=/usr/local//Cellar/llvm/4.0.0/bin/llvm-config ') Finding clang Use Your System’s version Unless you define RTAGSBUILDCLANG in cmake (or configure), the build system will try to locate the required llvm/clang libraries and options automatically from what is installed on your system. RTags needs three pieces of information about libclang.

All of these can be provided to cmake by way of an environment variable or a cmake variable. If not provided we will try to find llvm-config and interrogate it for the information. You can tell RTags which llvm-config to use like this.

$ llvm-config -cxxflags # Max OS X -I/usr/local/Cellar/llvm36/3.6.0/lib/llvm-3.6/include -DNDEBUG -DGNUSOURCE -DSTDCCONSTANTMACROS -DSTDCFORMATMACROS -DSTDCLIMITMACROS -O3 -std=c11 -fvisibility-inlines-hidden -fno-exceptions -fno-common -Woverloaded-virtual -Wcast-qual # Fedora 23 64 bit -I/usr/include -DNDEBUG -DGNUSOURCE -DSTDCCONSTANTMACROS -DSTDCFORMATMACROS -DSTDCLIMITMACROS -O3 -std=c11 -fvisibility-inlines-hidden -fno-exceptions -fno-common -Woverloaded-virtual -Wcast-qual. LIBCLANGLIBDIR Usually something like this.

Ln -s /path/to/rtags/bin/gcc-rtags-wrapper.sh /somewhere/that/is/in/your/path/before/usr/bin/gcc ln -s /path/to/rtags/bin/gcc-rtags-wrapper.sh /somewhere/that/is/in/your/path/before/usr/bin/c ln -s /path/to/rtags/bin/gcc-rtags-wrapper.sh /somewhere/that/is/in/your/path/before/usr/bin/cc ln -s /path/to/rtags/bin/gcc-rtags-wrapper.sh /somewhere/that/is/in/your/path/before/usr/bin/g E.g. $ which -a gcc xargs file /home/abakken/bin/gcc: symbolic link to `/home/abakken/dev/rtags/bin/gcc-rtags-wrapper.sh' /usr/bin/gcc: symbolic link to `gcc-4.7' Now every time you compile a file with which gcc rc will get its grubby hands all over your command line and make sure RTags knows about it.

RTags will group source files into projects based on some heuristics. Essentially it will look for certain files/dirs (like configure/CMakeLists.txt/scons.1/.git) etc to try to determine the likely project root for each source file. For generated source files that end up in the build directory we try to find the source root based on similar heuristics around config.status/CMakeCache.txt etc. Usually this works out reasonably well. If it doesn’t for you, you can pass -project-root /path/to/the/project/root to rc.

RTags only gives you information about current project when you ask for things by name. You can explicitly change the current project using. Rc -w foobar We try to do it automatically for you by passing along information about the current buffer when we call rc from elisp so that rdm can update its current project on demand.

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RTags keeps a cache of indexed data so you don’t have to reindex everything if you restart it. The location of this data is by default /.rtags but can be overridden by passing -data-dir /other/dir to rdm or putting something like this in your /.rdmrc: $ cat /.rdmrc -data-dir=/other/dir Integration with launchd (Mac OS X) On Mac OS X, you can set rdm can be run on demand, on your behalf, by launchd, and have it exit cleanly after a period of inactivity. The easiest way to do this is with Homebrew: brew services start rtags You can also do it manually using the following steps:. Create a file, e.g., in emacs, with the following contents. DOCTYPE plist PUBLIC '-//Apple//DTD PLIST 1.0//EN' ' Label com.andersbakken.rtags.agent ProgramArguments sh -c $RDM -v -launchd -inactivity-timeout 300 -log-file /Library/Logs/rtags.launchd.log Sockets Listener SockPathName $HOME/.rdm. Replace $HOME with the absolute path to your home folder.

Replace $RDM with the path to your copy of rdm, and add any command line parameters you might usually use. (The SockPathName entry relates to the name of the domain socket that rdm uses.

The settings above are for the default value; if your command line options direct it to use some other name, please modify it to suit. Unfortunately launchd’s configuration files are a bit naff, so you’ll have to repeat yourself.).

Save the result as /Library/LaunchAgents/com.andersbakken.rtags.agent.plist. Run the following command from the terminal: launchctl load /Library/LaunchAgents/com.andersbakken.rtags.agent.plist (This will happen automatically next time you log back in.). Try using RTags, and you should find rdm will spring into life! Notes.

rdm will automatically quit after 5 minutes of inactivity (this is what the -inactivity-timeout 300 command line option is for), so it won’t stick around hogging memory. But launchd will still be watching its socket for activity, and will relaunch it if necessary. You can watch launchd’s logging by tailing /Library/Logs/rtags.launchd.log. Integration with systemd (GNU Linux) On GNU/Linux distributions based on the systemd service manager, rdm can also be socket acivated.

Add the following to /.config/systemd/user/rdm.socket Unit Description=RTags daemon socket Socket ListenStream=%t/rdm.socket Install WantedBy=default.target. Add the following to /.config/systemd/user/rdm.service Unit Description=RTags daemon Requires=rdm.socket Service Type=simple ExecStart=$RDM -v -inactivity-timeout 300 -log-flush ExecStartPost=/bin/sh -c 'echo +19 /proc/$MAINPID/autogroup' Nice=19 CPUSchedulingPolicy=idle. Replace $RDM with the path to your copy of rdm, and add any command line parameters you might usually use. You have to use absolute paths here.%h is expanded to your home directory. Environment variables are not expanded inside strings. Run the following command from the terminal.

(rtags-find-symbol-at-point) Follow symbol under cursor. For references this goes to the definition (or declaration if no definition is known of the symbol. For declarations it goes to the definition and vice versa. For definitions of variables/parameters with constructors it goes to the constructor in question.

If you pass a prefix argument, limit to current source file, if you pass a prefix argument and have narrowed the current file, limit to the narrowed region. This prefix argument is the same for: rtags-find-references-at-point, rtags-find-symbol, rtags-find-references. ( require 'flycheck-rtags) Optional You may explicitly select the RTags Flycheck checker for some major modes for better experience.

At the moment there is no customize option available to choose between rtags-diagnostics overlays or Flycheck overlays, nor is it planned right now. We recommend setting flycheck-highlighting-mode locally to nil as the RTags overlays are more accurate. Further, Flycheck will trigger automatically, based on events, the syntax checker for the current buffer, this is however, pretty useless in conjunction with RTags. We trigger it manually because we find it gives you a better experience. To turn off the automatic Flycheck syntax checking, set the variable flycheck-check-syntax-automatically locally to nil. ( setq rtags-autostart-diagnostics t) ( defun my-flycheck-rtags-setup (flycheck-select-checker 'rtags) ( setq-local flycheck-highlighting-mode nil);; RTags creates more accurate overlays.

( setq-local flycheck-check-syntax-automatically nil)) ( add-hook 'c-mode-hook # 'my-flycheck-rtags-setup) ( add-hook 'c-mode-hook # 'my-flycheck-rtags-setup) ( add-hook 'objc-mode-hook # 'my-flycheck-rtags-setup) Helm integration You can use Helm to view the result, to do so, set rtags-display-result-backend to helm. You don’t need to load helm-rtags, we do it. If you have installed RTags through MELPA you need to install helm-rtags.

Gdb -p `pidof rp ` Support for other editors There are several other projects integrating RTags with other editors. Sublime Text: Vim: Neovim: Note to those maintainers. If you need RTags to behave differently or add features to make these other integration’s easier (like produce output in other formats etc), just drop us a note. Coding style We are always excited to accept bug fixes, improvements and features through code contributions.

Feel free to send a pull request for anything you think could be improved upon. We’d like contributions to adhere to our coding style. The coding style can kinda be deduced from this.