gitignore across all branches?

Hey I'm trying to get into git, as an emacs user first thing 开发者_开发知识库to do is to make sure the ~ and #*# files are ignored by git. Documentation talks about .gitignore which I've been using. However couple of questions remain:

• gitignore is now checked in and part of a branch. Should .gitignore be checked in and if so, how can i make it easy available across all branches in my repository?
• is there a way to use the gitignore with git config so gitignore stays constant over all my repos?
• How can I deal with emacs lock files as #*# is treated as a comment?

I'm on mac ox snow leopard. regards, Jeroen

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Add this to your $HOME/.gitconfig ;

[core]
    excludesfile = /path/to/your/local/.gitignore

Then it'll be locally available on all your git repositories.

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If you created the gitignore file before creating the branches, it's obviously available in them. Otherwise you need to merge that file to other branches.

You can define a global ignore file with git config --global core.excludesfile [ignorefile].

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• http://cogniton-mind.tumblr.com/post/1423976659/howto-gitignore-for-different-branches
• You can create a global gitignore

create a ~/.gitignore in your user directory

.DS_Store 
*.pyc 
.svn 

then run: git config --global core.excludesfile ~/.gitignore

• Emacs files

  \#*#

Since 1.6.2, \ should be supported in .gitignore

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1. Check-in the .gitignore file. It is available across all the branches (unless you mess about with it) and keep it up to date with all your exclusions
2. Use a global gitignore file.

3. Add this to your gitignore file.

   #
   .#

I've written about the three ways of excluding files here.

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Simplest way to get that file into all branches would be probably git cherry-pick commit with .gitignore file into those branches