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Answer» When a project repository is initialized to be a git repository, git stores all its metadata in a hidden folder “.git” under the project root directory.
Git repository is a collection of objects. Git has 4 types of objects – blobs, trees, tags, and commits. Every commit creates a new commit object with a unique SHA-1 hash_id.
Each commit object has a pointer reference to the tree object, its parent object, author, COMMITTER and the commit message.
Diagram: Single Commit object To see the commit log message along with the textual diff of the code, run:
git show <commit_id>
Divya1@Divya:initialRepo [master] $git show f9354cb
commit f9354cb08d91e80cabafd5b54d466b6055eb2927
Author: divya bhushan <divya_bhushan@hotmail.com>
Date: MON Feb 11 23:39:24 2019 +0100
Add database logs.
diff --git a/logs/db.log b/logs/db.log
new file mode 100644
INDEX 0000000..f8854b0
--- /dev/null
+++ b/logs/db.log
-0,0 +1
+database logsTo read a commit object git has ‘git cat-file’ utility.
Divya1@Divya:initialRepo [master] $git cat-file -p f9354cb
tree 2a85825b8d20918350cc316513edd9cc289f8349
parent 30760c59d661e129329acfba7e20c899d0d7d199
author divya bhushan <divya_bhushan@hotmail.com> 1549924764 +0100
committer divya bhushan <divya_bhushan@hotmail.com> 1549924764 +0100
Add database logs.A tree object is LIKE an OS directory that stores references to other directories and FILES (blob type).
Divya1@Divya:initialRepo [master] $git cat-file -p 2a85825b8d20918350cc316513edd9cc289f8349
100755 blob 054acd444517ad5a0c1e46d8eff925e061edf46c README.md
040000 tree dfe42cbaf87e6a56b51dab97fc51ecedfc969f39 code
100644 blob e08d4579f39808f3e2830b5da8ac155f87c0621c dockerfile
040000 tree 014e65a65532dc16a6d50e0d153c222a12df4742 logs
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