Hi all,
I'm the author of http://blog.teksol.info/2009/04/15/beware-of-gits-content-tracking.html
In http://article.gmane.org/gmane.comp.version-control.git/116954, Johannes was very critical of me, so here's the full story.
I cloned the repository and branched master to do some integration work. On the integration branch, I created an empty file. At one point, I merged from master and had some conflicts. While resolving the conflicts, I happened to notice a file that didn't exist on master had been modified.
Full transcript follows:
$ git checkout -b merge-tracking-reproduce 5b8520419833635c61bdfb9abbbdc086df512388 # integration branch $ git merge 5ed60ecabd585972003084e07401f598d00f5a1d # master branch
$ git status # On branch merge-tracking-reproduce # Changes to be committed: # (use "git reset HEAD <file>..." to unstage) # ... # modified: vendor/plugins/acts_as_money/LICENSE # # Changed but not updated: # (use "git add <file>..." to update what will be committed) # ... a couple of conflicts, they don't matter
$ git diff --cached vendor/plugins/acts_as_money/LICENSE
diff --git a/vendor/plugins/acts_as_money/LICENSE b/vendor/plugins/ acts_as_money/LICENSE index e69de29..a273c73 100644 --- a/vendor/plugins/acts_as_money/LICENSE +++ b/vendor/plugins/acts_as_money/LICENSE @@ -0,0 +1,4 @@ +one: + user: active + name: name + description: description $ git log 5b8520419833635c61bdfb9abbbdc086df512388 -- vendor/plugins/ acts_as_money/LICENSE # on integration branch commit c25787637b6ac5d8f0783cf1688c9ce6fb135659 Author: François Beausoleil <francois@teksol.info> Date: Thu Apr 9 14:15:03 2009 -0400 Added Quirky dependencies $ git log 5ed60ecabd585972003084e07401f598d00f5a1d -- vendor/plugins/ acts_as_money/LICENSE # on master branch # empty, no file by that name on master $ git log "-Sdescription: description" 5b8520419833635c61bdfb9abbbdc086df512388 # on integration branch $ git log "-Sdescription: description" 5ed60ecabd585972003084e07401f598d00f5a1d # on master branch commit 36d2a29d0c3c3a2a51db5f3be9faea7cea7ff3c1 Author: Michael Lacy <mike@kluster.com> Date: Tue Apr 14 10:16:50 2009 -0400 quirky voting $ git diff 36d2a29d0c3c3a2a51db5f3be9faea7cea7ff3c1^.. 36d2a29d0c3c3a2a51db5f3be9faea7cea7ff3c1 -- vendor/gems/thoughtbot- shoulda-2.10.1/test/fixtures/products.yml diff --git a/vendor/gems/thoughtbot-shoulda-2.10.1/test/fixtures/ products.yml b/vendor/gems/thoughtbot-shoulda-2.10.1/test/fixtures/ index e69de29..a273c73 100644 --- a/vendor/gems/thoughtbot-shoulda-2.10.1/test/fixtures/products.yml +++ b/vendor/gems/thoughtbot-shoulda-2.10.1/test/fixtures/products.yml @@ -0,0 +1,4 @@ +one: + user: active + name: name + description: description Regarding Anders reproduction recipe, no file was deleted. I'm trying to write a reproduction script, but haven't managed to reproduce it just yet. The steps I *think* happened are thus: cd $(mktemp -d repo.XXXXXX) git init touch README git add README git commit --message "First commit" git checkout -b integration mkdir -p vendor/a touch vendor/a/LICENSE git add vendor/a/LICENSE git commit --message "Adding LICENSE" git checkout master mkdir -p vendor/b touch vendor/b/COPYING git add vendor/b/COPYING git commit --message "Adding COPYING" echo "adding some content" > vendor/b/COPYING git commit --all --message "Updated COPYING" git checkout integration git merge master git diff HEAD^..HEAD But the bug isn't reproduced with these steps. If you want access to the repository, please contact me privately and I'll give you access. Johannes, you were right: I should have found the right avenue for posting this question and done so. If not immediately, at least the next day. It was late, I had other things to do, I just decided to post a quick note. Call me lazy, yes. Incompetent, that's going a bit too far. I hope my competence can be redeemed in your eyes. Have a nice day! -- François Beausoleil http://blog.teksol.info/ http://piston.rubyforge.org/
