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scm: git: recovery and improve comments of fetching from 1.1 about harmful influence that git does not have the revision number (#9472) 

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@7658 e93f8b46-1217-0410-a6f0-8f06a7374b81
This commit is contained in:
Toshi MARUYAMA 2011-10-27 00:35:43 +00:00
parent ad9e486077
commit 01d3af65b3
1 changed files with 11 additions and 0 deletions
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11
app/models/repository/git.rb
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@ -95,6 +95,17 @@ class Repository::Git < Repository
options = {:report_last_commit => extra_report_last_commit})
end
# With SCMs that have a sequential commit numbering,
# such as Subversion and Mercurial,
# Redmine is able to be clever and only fetch changesets
# going forward from the most recent one it knows about.
#
# However, Git does not have a sequential commit numbering.
#
# In order to fetch only new adding revisions,
# Redmine need to parse revisions per branch.
# Branch "last_scmid" is for this requirement.
#
# In Git and Mercurial, revisions are not in date order.
# Redmine Mercurial fixed issues.
# * Redmine Takes Too Long On Large Mercurial Repository