{"id":3219,"date":"2018-04-17T14:06:59","date_gmt":"2018-04-17T12:06:59","guid":{"rendered":"http:\/\/blog.gocept.com\/?p=3219"},"modified":"2018-04-18T09:07:53","modified_gmt":"2018-04-18T07:07:53","slug":"allow-hosts-in-buildout-considered-harmful","status":"publish","type":"post","link":"https:\/\/blog.gocept.com\/2018\/04\/17\/allow-hosts-in-buildout-considered-harmful\/","title":{"rendered":"“allow-hosts” in buildout considered harmful"},"content":{"rendered":"

Today we had the following error message when re-installing a project from scratch:<\/p>\n

 While:\n   Installing.\n   Getting section application.\n   Initializing section application.\n   Installing recipe zc.zope3recipes.\n   Getting distribution for 'zc.zope3recipes==0.13.0'.\n Error: Couldn't find a distribution for 'zc.zope3recipes==0.13.0'.<\/pre>\n
Yes this is a really old recipe but it still exists on PyPI<\/a>. We are using zc.buildout<\/code>\u00a0in Version 2.10<\/code>, and do not use a custom index<\/code>. So being forced to use HTTPS to access PyPI does not seem be the problem.<\/p>\n
After searching way too long we found that .buildout\/default.cfg<\/code>\u00a0contains the following statement:<\/p>\n
allow-hosts =\n   *.python.org\n   *.gocept.com\n   *.gocept.net\n   effbot.org\n   dist.plone.org<\/pre>\n
It restricts the allowed hosts for download but it seems to restrict the index, too.\u00a0https:\/\/pypi.python.org\/simple<\/code>\u00a0nowadays redirects to\u00a0https:\/\/pypi.org\/simple<\/code> which is not on the list.<\/p>\n
Suggestion: Remove allow-hosts<\/code>\u00a0if possible. It is more harmful than good, especially because packages are nowadays downloaded from https:\/\/files.pythonhosted.org<\/code>.<\/p>\n
UPDATE:<\/strong><\/p>\n
I filed an issue for zc.buildout<\/code>\u00a0at GitHub:\u00a0buildout\/buildout#447<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
Today we had the following error message when re-installing a project from scratch: While: Installing. Getting section application. Initializing section application. Installing recipe zc.zope3recipes. Getting distribution for ‘zc.zope3recipes==0.13.0’. Error: Couldn’t find a distribution for ‘zc.zope3recipes==0.13.0’. Yes this is a really old recipe but it still exists on PyPI. We are using zc.buildout\u00a0in Version 2.10, and … Continue reading ““allow-hosts” in buildout considered harmful”<\/span><\/a><\/p>\n","protected":false},"author":15344399,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_newsletter_tier_id":0,"footnotes":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[10221],"tags":[1204731,8915,11869,6743072,832,23139133],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/pFP3y-PV","jetpack-related-posts":[{"id":268,"url":"https:\/\/blog.gocept.com\/2012\/11\/09\/python-2-and-3-compatible-builds-with-zc-buildout\/","url_meta":{"origin":3219,"position":0},"title":"Python 2 and 3 compatible builds with zc.buildout","author":"","date":"November 9, 2012","format":false,"excerpt":"Creating a single-source build environment with zc.buildout that works for both Python 2 and 3 is a bit of a hassle. 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