rosinstall_generator fails on OS X Maverick

Question

Hi,

I have recently tried to install ROS hydro on OS X with HomeBrew but the rosinstall_generator fails with: (links looking like that , because had no enough karma to publish a link :))

rosinstall_generator desktop_full --rosdistro hydro --deps --wet-only --tar > hydro-desktop-full-wet.rosinstall Traceback (most recent call last):
File "/usr/local/bin/rosinstall_generator", line 117, in rc = main() File "/usr/local/bin/rosinstall_generator", line 105, in main tar=args.tar) File "/Library/Python/2.7/site-packages/rosinstall_generator/generator.py", line 189, in generate_rosinstall names, unknown_names = _classify_names(distro_name, names) File "/Library/Python/2.7/site-packages/rosinstall_generator/generator.py", line 84, in _classify_names wet_distro = get_wet_distro(distro_name) File "/Library/Python/2.7/site-packages/rosinstall_generator/generator.py", line 170, in get_wet_distro _wet_distro = _get_wet_distro(distro_name) File "/Library/Python/2.7/site-packages/rosinstall_generator/distro.py", line 45, in get_distro return get_cached_distribution(index, distro_name) File "/Library/Python/2.7/site-packages/rosdistro/init.py", line 134, in get_cached_distribution cache = get_distribution_cache(index, dist_name) File "/Library/Python/2.7/site-packages/rosdistro/init.py", line 160, in get_distribution_cache yaml_gz_str = load_url(url, skip_decode=True) File "/Library/Python/2.7/site-packages/rosdistro/loader.py", line 59, in load_url raise URLError(str(e) + ' (%s)' % url) urllib2.URLError: <urlopen error <urlopen error [Errno 8] nodename nor servname provided, or not known> (http: // ros.org / rosdistro / hydro-cache . yaml . gz)>

The problem is that it can't resolve the url: http: // ros . org / rosdistro / hydro-cache.yaml.gz. I believe the rewrite rules are missing from the ros server, as http: // www . ros . org / rosdistro / hydro-cache.yaml.gz is reachable and http: // ros . org / rosdistro / hydro-cache.yaml.gz is not.

Any help would be appreciated,

Thanks, Csongor

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Originally posted by zobi on ROS Answers with karma: 3 on 2014-03-19

Post score: 0

Answer 1

I can not reproduce this problem, it works just fine on OS X over here. And the cache without www is also reachable. Maybe it was a temporary problem. You could also try pip install -U rosinstall_generator, but I don't see how that should make much of a difference if the URL reachability is indeed the issue. Please double check that the URL is not reachable for you: wget http://ros.org/rosdistro/hydro-cache.yaml.gz.

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Originally posted by demmeln with karma: 4306 on 2014-03-19

This answer was ACCEPTED on the original site

Post score: 0

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Original comments

Comment by zobi on 2014-03-19:
Thanks.That is right, now it works. Might have been a temporary issue.

Comment by voladoddi on 2014-07-09:
Hello, I'm struggling with the same problem.

To double check I tried "wget..." as suggested above, and I get a message "-bash: wget: command not found"

[on Mac OS X Mavericks]

Comment by ahendrix on 2014-07-09:
OSX doesn't have wget installed by default. You can use

curl

instead or install wget through homebrew:

brew install wget

Comment by voladoddi on 2014-07-09:
@ahendrix thanks for your comment. I did directly paste it in the browser URL bar and I couldn't access it. however, i put a "www" between "http://" and "ros.", and I could download the cache.

It seems to be impossible to do so using rosintall_generator for me. Any ideas about a workaround?

Comment by voladoddi on 2014-07-09:
Well, it turns out that the URL was not accessible from a secure wi-fi space even with access to it. I tried again after getting home from work and it runs fine.

Strange.

Thank you nevertheless.

Comment by ahendrix on 2014-07-09:
Are you certain you have the latest version of rosinstall_generator? I have version 0.1.9 on linux; the same version should work on OSX. You should be able to get your rosinstall_generator version with

python -c 'import rosinstall_generator; print rosinstall_generator.version'