Git commit-tree¶

Resources¶

Part 3: Context from commits – alexwlchan

From a-plumbers-guide-to-git. Related to git-write-tree.

.
├── animals.txt
├── animals_copy.txt
└── underwater
    ├── d.txt
    └── e.txt

git write-tree
# 8d5fc21669952dd828232aae1461662eb8a80038

echo "initial commit" | git commit-tree 8d5fc21669952dd828232aae1461662eb8a80038
# 3e6e45584241f2eb95a7ba2460281a1ee01d3573

git cat-file -p 3e6e45584241f2eb95a7ba2460281a1ee01d3573

tree 8d5fc21669952dd828232aae1461662eb8a80038
author Dhruv Thakur <email> 1670308923 +0100
committer Dhruv Thakur <email> 1670308923 +0100

initial commit

A commit has far more context than a tree: it tells us when it was created, who by, and the free text message lets us include any other relevant details.

Building a linear history¶

Use -p flag to point to a parent commit.

git update-index --add underwater/d.txt

git write-tree
# 32d0ec69a947b0c3bdbd42a0cebafef426bd9b70

echo "new line in d.txt" | git commit-tree 32d0ec69a947b0c3bdbd42a0cebafef426bd9b70 -p 3e6e45584241f2eb95a7ba2460281a1ee01d3573
# 092eb0b62c3eb4466ece5ff6cc9c98b1cf6da0a8

git cat-file -p 092eb0b62c3eb4466ece5ff6cc9c98b1cf6da0a8

tree 32d0ec69a947b0c3bdbd42a0cebafef426bd9b70
parent 3e6e45584241f2eb95a7ba2460281a1ee01d3573
author Dhruv Thakur <email> 1670309292 +0100
committer Dhruv Thakur <email> 1670309292 +0100

new line in d.txt

How it fits into the bigger picture¶

commits-trees-blobs