git-checkout question

Hi, 

I was wondering if someone could explain the following behavior.

1. create and switch to branch off master
2. edit a file in the branch
3. checkout master without committing changes in the branch
4. the changes in the branch are automatically applied in working tree 
   in master

I wasn't expecting the changes in the branch to be automatically moved to master. Had I committed while in the branch this doesn't happen. I'm using git version 1.5.3, the details are below.

Many thanks!

Cheers, David

[/tmp] mkdir git-test
[/tmp] cd git-test
[/tmp/git-test] git-init 
Initialized empty Git repository in .git/
[/tmp/git-test] # create hello.py
[/tmp/git-test] git-add hello.py 
[/tmp/git-test] git-commit   
Created initial commit 58282ee: Initial commit of git-test.
 1 files changed, 1 insertions(+), 0 deletions(-)
 create mode 100644 hello.py
[/tmp/git-test] cat hello.py 
print "hello from master."
[/tmp/git-test] git-checkout -b test-branch
Switched to a new branch "test-branch"
[/tmp/git-test] # modify hello.py
[/tmp/git-test] cat hello.py 
print "hello from test-branch."
[/tmp/git-test] git-checkout master
M       hello.py
Switched to branch "master"
[/tmp/git-test] cat hello.py 
print "hello from test-branch."
[/tmp/git-test] # hmmm?

On Jan 13, 2008, at 3:21 PM, David J. Neu wrote:

This already is the explanation. You did not commit. Therefore, the changes are not in the branch but still in your work tree. They are on neither branch; they are _only_ in your work tree. If you switch the branch the changes will stay in the work tree. They always stayed in the same place: your work tree.

	Steffen

On Sun, Jan 13, 2008 at 03:31:19PM +0100, Steffen Prohaska wrote:

Ahh, got it - thanks!