Problems installing Hydro on 12.04 from source on armhf

edit

Hi I'm having a dependency issue trying to install Hydro on 12.04 from source. I get an error:

E: Unable to locate package python-wstool

after the part:

sudo apt-get install python-rosdep python-rosinstall-generator python-wstool build-essential

I was getting the same error but for all the dependencies, however that was resolved by apt-get update command.

Any suggestions. This is going onto an ARM device with 12.04 installed and did have fuerte installed.

EDIT I found and followed this option to use pip to install wstools instead. However now getting the following error:

     Found existing installation: rospkg 1.0.18
    Uninstalling rospkg:
      Successfully uninstalled rospkg
  Running setup.py install for rospkg
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
    ImportError: No module named setuptools
    Complete output from command /usr/bin/python -c "import setuptools;__file__='/home/ubuntu/build/rospkg/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --single-version-externally-managed --record /tmp/pip-65brKO-record/install-record.txt:
    Traceback (most recent call last):

  File "<string>", line 1, in <module>

ImportError: No module named setuptools

----------------------------------------
  Rolling back uninstall of rospkg
Command /usr/bin/python -c "import setuptools;__file__='/home/ubuntu/build/rospkg/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --single-version-externally-managed --record /tmp/pip-65brKO-record/install-record.txt failed with error code 1
Storing complete log in /home/ubuntu/.pip/pip.log

EDIT Okay needed to install setuptools as per the directions here.

came up with a new error ends with:

ImportError: No module named pkg_resources

EDIT Okay theres a happy ending to this story however there seems to be a degree of luck in achieving it, so I am happy if someone can improve this.

First I purged and removed python-pkg-resources, this is the part that seems most dodgy:

sudo apt-get remove --purge python-pkg-resources

and then reinstalled it:

sudo apt-get install python-pkg-resources python-nose python-pip python-setuptools

Things were a bit broken (eggs) but this seemed to do the trick.

sudo pip install --upgrade setuptools

after which the pip install command worked:

sudo pip install -U wstool

EDIT

Well it actually didn't work when I went to deal with the installation of rosdep. there were unmet dependencies which may have resulted directly from using pip to install wstools.

A full reinstall of ubuntu didn't work either, apt-get still cant find python-wstools.

EDIT

I reused pip to install rosdep, wstools and rosinstall_generator, and was able to download the source packages, but when executing the command:

rosdep install --from-paths src --ignore-src --rosdistro hydro -y

It would download and unpack dependencies for a couple of hours then stop on error:

executing command [sudo apt-get install -y python-rospkg]
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package python-rospkg is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'python-rospkg' has no installation candidate
ERROR: the following rosdeps failed to install
  apt: command [sudo ...