Add a safe migration mode to the wiki migrator.

Created by: DanKnox

The safe migrate mode can be invoked by setting the safe_migrate environment variable to 'true' on the command line when running the task.

RAILS_ENV=production rake gitlab:wiki:migrate safe_migrate=true

This branch was created off of the 5-0-stable branch. I am targeting that branch in this pull request as well.

This should fix issue #3312 (closed)

Created by: bigeagle

I still meet the same problem with this patch,

# sudo -u git -H RAILS_ENV=production rake gitlab:wiki:migrate safe_migrate=true --trace

** Invoke gitlab:wiki:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute gitlab:wiki:migrate

Migrating Wiki for 'server/wsnrouter'
  Creating page 'GPRS 协议规范'...
rake aborted!
incompatible character encodings: UTF-8 and ASCII-8BIT
/home/git/gitlab/vendor/bundle/ruby/1.9.1/bundler/gems/grit-c40a32432616/lib/grit/index.rb:176:in `%'
/home/git/gitlab/vendor/bundle/ruby/1.9.1/bundler/gems/grit-c40a32432616/lib/grit/index.rb:176:in `block in write_tree'
/home/git/gitlab/vendor/bundle/ruby/1.9.1/bundler/gems/grit-c40a32432616/lib/grit/index.rb:171:in `each'
/home/git/gitlab/vendor/bundle/ruby/1.9.1/bundler/gems/grit-c40a32432616/lib/grit/index.rb:171:in `write_tree'
/home/git/gitlab/vendor/bundle/ruby/1.9.1/bundler/gems/grit-c40a32432616/lib/grit/index.rb:123:in `commit'
/home/git/gitlab/vendor/bundle/ruby/1.9.1/bundler/gems/gollum-5dcd3c8c8f68/lib/gollum/committer.rb:163:in `commit'
/home/git/gitlab/vendor/bundle/ruby/1.9.1/bundler/gems/gollum-5dcd3c8c8f68/lib/gollum/wiki.rb:327:in `write_page'
/home/git/gitlab/app/models/gollum_wiki.rb:74:in `create_page'
/home/git/gitlab/app/models/wiki_page.rb:168:in `save'
/home/git/gitlab/app/models/wiki_page.rb:127:in `create'
/home/git/gitlab/lib/wiki_to_gollum_migrator.rb:71:in `create_page_and_revisions'
/home/git/gitlab/lib/wiki_to_gollum_migrator.rb:52:in `block in create_pages'
/home/git/gitlab/lib/wiki_to_gollum_migrator.rb:51:in `each'
/home/git/gitlab/lib/wiki_to_gollum_migrator.rb:51:in `create_pages'
/home/git/gitlab/lib/wiki_to_gollum_migrator.rb:19:in `block in migrate!'
/home/git/gitlab/lib/wiki_to_gollum_migrator.rb:16:in `each'
/home/git/gitlab/lib/wiki_to_gollum_migrator.rb:16:in `migrate!'
/home/git/gitlab/lib/tasks/gitlab/migrate_wiki.rake:23:in `block (3 levels) in <top (required)>'

By Administrator on 2013-04-25T08:35:44 (imported from GitLab project)

By Administrator on 2013-04-25T08:35:44 (imported from GitLab)

Created by: bigeagle

After executing RAILS_ENV=production rake gitlab:wiki:rollback and re-exec safe_migration, everything works.

Thanks for the patch!

By Administrator on 2013-04-25T08:38:40 (imported from GitLab project)

By Administrator on 2013-04-25T08:38:40 (imported from GitLab)

Created by: dzaporozhets

thank you!

By Administrator on 2013-04-26T09:05:27 (imported from GitLab project)

By Administrator on 2013-04-26T09:05:27 (imported from GitLab)