To compile only one ROS package in a catkin workspace use
    catkin_make --pkg MY_PACKAGE_NAME
Please note, that this will still call CMake (and use CMakeLists.txt) to generate Makefile's for ALL the packages of your workspace, but compiling, i.e. calling the GNU compiler with Makefile's will be only performed on MY_PACKAGE_NAME


----


The equivalent of calling ''catkin_make'' in the workspace root directory is 
    cd ~/workspace/catkin/build
    cmake ../src  (which is similar to ./configure i guess)
    make MY_PACKAGE_NAME

----

The equivalent of $ROS_PACKAGE_PATH for catkin is the CMake environment variable $CMAKE_PREFIX_PATH, which will usually point to your ros distro (i.e. /opt/ros/super-turtle-distro-name) and the ''devel'' directory of your catkin workspace (workspaces). So it seems that CMake doesn't need to know where your source files are, but it needs to know where the makefiles of your packages are and other similar stuff, and they are in the build directory, and the environment setup script in ''devel'' tells cmake where your build directory is. And then the makefiles in their turn point to your packages in the source directory (and CMakeCache.txt is the important file here). So that's why I guess if you delete your devel directory and source ~/.bashrc, ros will not be able to find any catkin packages anymore. So, to summarize, **catkin (and ros in general) doesn't care about where your package sources are stored, what is crucial are the corresponding files from ''devel'' generated for each of your catkin packages, and the generated files from ''build'' to which devel points to i guess**.



----

**Testing**
<test_depend> are dependencies that are required for running tests. Catkin packages use macros that define make targets prefixed with run-tests. They can be run by invoking catkin_make run_tests[_...] or just using make run_tests[_...]. <test_depend> should declare dependencies that are only used during this testing process.

----


Variables that can be used in CMakeLists.txt:
<code>
${PROJECT_NAME}
${<PACKAGE_NAME>_FOUND}
<PACKAGE_NAME>_INCLUDES
<PACKAGE_NAME>_LIBS
catkin_INCLUDE_DIRS
catkin_LIBRARIES
</code>


----

Hotkeys :

C-c C-d d   describe \\
C-h b      list all bindings. Then C-s slime.

-----

[[http://cram-system.org/doc/patmatch|Pattern matching]]

------
=== Git stuff ===
cherry-pick remote branch commits:

<code bash>
git fetch my-remote-branch-name (e.g. upstream)
git cherry-pick sha-of-commit
</code>

--

As upstream for your repo set your fork on GitHub and use ''git@github.com:yourusername/forkedrepo.git'' instead of ''https://github.com/yourusername/forkedrepo.git'' so that it uses your RSA keypairs for authentication instead of asking password each time you push.R: /home/gkazhoya/workspace/rosbuild/mongo_prolog/prolog/init.pl:23:
	source_sink `library(xpce_ex)' does not exist
Warning: /home/gkazhoya/workspace/rosbuild/mongo_prolog/prolog/init.pl:23:
	Goal (directive) failed: user:use_module(library(xpce_ex))
%  /home/gkazhoya/workspace/rosbuild/mongo_prolog/prolog/init.pl compiled 0.01 sec, 313,224 bytes
ERROR: /home/gkazhoya/workspace/rosbuild/mongo_prolog/prolog/init.pl:23:
	source_sink `library(xpce_ex)' does not exist

--

Moving dir to another repo with history

<code bash>
  cd /tmp
  git clone https://github.com/cram-code/REPO.git
  cd REPO
  git filter-branch --prune-empty --subdirectory-filter MY_DIR -- --all
  git filter-branch --force --index-filter 'git ls-files -s | sed "s-\t\"*-&newsubdir/-" | GIT_INDEX_FILE=$GIT_INDEX_FILE.new git update-index --index-info && mv "$GIT_INDEX_FILE.new" "$GIT_INDEX_FILE"' HEAD
                                    
  roscd REPO2
  git remote add tmp /tmp/REPO
  git pull tmp
  git commit --amend --vm "Moved MY_DIR here from REPO"
  git remote rm tmp
</code>

---

When installing both moveit full (including mongo-db deps) and mongodb-10gen, both try to write to the same file. So, force the overwrite when installing the second of the mongodb packages: http://www.webupd8.org/2011/02/fix-dpkg-error-trying-to-overwrite-x.html


---

Installing Andrei's system:

  * make sure full knowrob installation is provided
  * install mongodb-10gen (just google for "install mongodb" for ubuntu)
  * import a database into your mongodb: mongoimport --db sim_db --collection collection_X THE-FILE-ANDREI-CREATED-FOR-YOU-BY-EXPORTING
  * get Andrei's code from bitbucket: git clone https://bitbucket.org/ahaidu/mongo_prolog.git (or wstool whatever, it's rosmake atm)
(it's a private repo, you'll need to ask andrei for access)
  * rosrun rosprolog rosprolog mongo_prolog
  * make.
  * add_world_clauses.
  * in another terminal: roslaunch mongo_prolog mTAB


---
Running Daniel's stuff
source env.sh from the root
pracmln from the correct examples directory