When I do git diff COMMIT I see the changes between that commit and HEAD (as far as I know), but I would like to see the changes that were made by that single commit.
I haven't found any obvious options on diff / log that will give me that output.
To see the diff for a particular COMMIT hash, where COMMIT is the hash of the commit:
git diff COMMIT~ COMMIT will show you the difference between that COMMIT's ancestor and the COMMIT. See the man pages for git diff for details about the command and gitrevisions about the ~ notation and its friends.
Alternatively, git show COMMIT will do something very similar. (The commit's data, including its diff - but not for merge commits.) See the git show manpage.
(also git diff COMMIT will show you the difference between that COMMIT and the head.)
As mentioned in "Shorthand for diff of git commit with its parent?", you can also use git diff with:
git diff COMMIT^!
or
git diff-tree -p COMMIT
With git show, you would need (in order to focus on diff alone) to do:
git show --color --pretty=format:%b COMMIT
The COMMIT parameter is a commit-ish:
A commit object or an object that can be recursively dereferenced to a commit object. The following are all commit-ishes: a commit object, a tag object that points to a commit object, a tag object that points to a tag object that points to a commit object, etc.
See gitrevision "SPECIFYING REVISIONS" to reference a commit-ish.
See also "What does tree-ish mean in Git?".
Use:
git show <commit_sha>
This will show you just what's in that commit. You can do a range by just putting a space between the two commit SHA-1 hashes.
git show <beginning_sha> <ending_sha>
which is pretty helpful if you're rebasing often because your feature logs will all be in a row.
If you happen to want to look at the last 3 commits you can use the HEAD syntax
git show HEAD~3 HEAD
From the man page for git-diff(1):
git diff [options] [<commit>] [--] [<path>…]
git diff [options] --cached [<commit>] [--] [<path>…]
git diff [options] <commit> <commit> [--] [<path>…]
git diff [options] <blob> <blob>
git diff [options] [--no-index] [--] <path> <path>
Use the 3rd one in the middle:
git diff [options] <parent-commit> <commit>
Also from the same man page, at the bottom, in the Examples section:
$ git diff HEAD^ HEAD <3>
Compare the version before the last commit and the last commit.
Admittedly it's worded a little confusingly, it would be less confusing as
Compare the most recent commit with the commit before it.
git difftool COMMIT^ <commit hash>
is also possible if you have configured your difftool.
See here how to configure difftool. Or the manual page here.
Additionally, you can use git diff-tree --no-commit-id --name-only -r <commit hash> to see which files been changed/committed in a give commit hash.
To see author and time by commit, use git show COMMIT. Which will result in something like this:
commit 13414df70354678b1b9304ebe4b6d204810f867e
Merge: a2a2894 3a1ba8f
Author: You <[email protected]>
Date: Fri Jul 24 17:46:42 2015 -0700
Merge remote-tracking branch 'origin/your-feature'
If you want to see which files had been changed, run the following with the values from the Merge line above, git diff --stat a2a2894 3a1ba8f.
If you want to see the actual diff, run git --stat a2a2894 3a1ba8f.
This command will get you the Git parent commit-hash:
git log -n 2 <commit-hash>
After that git diff-tool <commit-hash> <parent-commit-hash>
Example:
bonnie@bonnie ~/ $ git log -n 2 7f65b9a9d3820525766fcba285b3c678e889fe3
commit 7f65b9a9d3820525766fcba285b3c678e889fe3b
Author: souparno <[email protected]>
Date: Mon Jul 25 13:17:07 2016 +0530
CSS changed to maintain the aspect ratio of the channel logos and to fit them properly.
commit c3a61f17e14e2b80cf64b172a45f1b4826ee291f
Author: souparno <[email protected]>
Date: Mon Jul 25 11:28:09 2016 +0530
The ratio of the height to width of the channel images are maintained.
After this
git difftool 7f65b9a9d3820525766fcba285b3c678e889fe3b c3a61f17e14e2b80cf64b172a45f1b4826ee291f
In case of checking the source change in a graphical view, use:
gitk (your commit id goes here)
For example:
gitk HEAD~1
For me this works just fine
git show COMMIT --compact-summary
Which shows the next information
Output a condensed summary of extended header information such as file creations or deletions ("new" or "gone", optionally "+l" if it’s a symlink) and mode changes ("+x" or "-x" for adding or removing executable bit respectively) in diffstat. The information is put between the filename part and the graph part. Implies --stat.
