git 303

git-commit-hard-way.txt

echo “foo” > example.txt

### add to .git/objects
git hash-object -w example.txt
git cat-file -p <blob-hash>

find .git/objects -type f

### add file to .git/index (“stage”)
git update-index ---add --cacheinfo 100644 <blob-hash> example.txt

### create tree node (from staged index)
git write-tree
git cat-file -p <tree-hash>

### add commit
echo "add example" | git commit-tree <tree-hash>
git cat-file -p <commit-hash>

### change a file
echo "baz" >> example.txt
git update-index example.txt
git write-tree

echo "update example" | git commit-tree <commit-hash-2> -p <commit-hash (von oben)>

#### git log doesn't show the new commits?!?!?
### `master` needs to be linked to the desired commit:
echo <commit-hash> > .git/refs/heads/master

From: https://medium.com/@shalithasuranga/how-does-git-work-internally-7c36dcb1f2cf