.git is initialized by git init.
.git contains all information required for version control. If you want to clone your repo, copy .git is enough.
4 sub-directories:
- hooks/ : example scripts
- info/ :
excludefile for ignored patterns - objects/ : all “objects”
- refs/ : pointers to commit objects
4 files:
- HEAD : current branch
- config : configuration options
- description
- index : staging area
Here “object” includes:
- blobs(files)
- trees(directories)
- commits(reference to a tree, parent commit, etc)
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