git write-tree

CommandNew filesChanged filesDeleted files
Alice/> git init
Initialized empty Git repository in /home/rene/github/github/git-internals/repos/write-tree/Alice/.git/
snap no: 1

First, Alice creates two files: foo-bar-baz.txt and …

Alice/> printf "foo\nbar\nbaz"   > foo-bar-baz.txt
snap no: 2
foo-bar-baz.txt

… one-two-three.txt.

Alice/> printf "one\ntwo\nthree" > one-two-three.txt
snap no: 3
one-two-three.txt

She adds both files to the index:

Alice/> git update-index --add *.txt
snap no: 4
.git/index
.git/objects/54/d55bf0bb50b503792f391b6f0158bd6145073e [blob]
.git/objects/98/a86f9e2ca687af0fd5822345534ccf0baad8fa [blob]

She also creates a third file …

Alice/> printf "eggs\nwhy\nz.\n" > xyz.txt

… that is not added to the index.

snap no: 5
xyz.txt

Alice creates a tree object from the files on the index.

Alice/> git write-tree
582a0898b5598958f3234e058338eb349e12fa39
snap no: 6
.git/objects/58/2a0898b5598958f3234e058338eb349e12fa39 [tree]