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feat(blog): update Git Ultimate Guide to add trick about cherry-pick and diff-commits alias

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Théo LUDWIG 2024-05-23 10:29:35 +02:00
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blog/posts/git-ultimate-guide.md
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@ -154,6 +154,17 @@ git reset --soft <branch>
# (by first being on the branch where you want to apply the commit)
git cherry-pick <commit>
# To avoid creating duplicated commits with cherry-pick, we can use rebase after cherry-pick.
# <target-branch> being the commit where you want to apply the commit to cherry-pick.
# <from-branch> being the branch where the commit to cherry-pick is.
git rebase <target-branch> <from-branch>
# If, by mistake, you have started a branch from the wrong base branch, you can rebase the branch on the correct base branch.
# For example, if you have started a branch `feature-2` from `feature` instead of `develop`, you can rebase the branch on `develop`.
git rebase --onto <new-base-branch> <old-base-branch> <branch>
# For example:
git rebase --onto develop feature feature-2
# To list all commits that differ between two branches
git log <branch1>..<branch2> # commits in branch2 that are not in branch1 (branch2 ahead of branch1, branch2 behind branch1)
git log <branch2>..<branch1> # commits in branch1 that are not in branch2 (branch1 ahead of branch2, branch1 behind branch2)
@ -245,6 +256,32 @@ There are many ways to organize the work, but the most popular ones are:
They are called **Git workflows**, or **Git branching strategies**.
## Tips and tricks
### `diff-commits` alias
The `git diff` command allows you to compare the changes between two commits, branches, etc.
Sometimes, you want to compare what commits have been made between two branches, without looking at the changes in the files, to do so, we can create an `alias` in `.gitconfig`:
```sh
[alias]
diff-commits = !sh -c 'echo -n "Commits in $2 not in $1 \\(" && printf "%d" $(git cherry -v $1 $2 | wc -l) && echo "\\)" && git cherry -v $1 $2 && echo "" && echo -n "Commits in $1 not in $2 \\(" && printf "%d" $(git cherry -v $2 $1 | wc -l) && echo "\\)" && git cherry -v $2 $1' -
```
With this alias, we can compare the commits between `main` and `develop` branches for example:
```sh
$ git diff-commits main develop
Commits in develop not in main (2)
+ 9b80e0724df8454b43bc3935a1bffb67615572d7 feat: new feature
+ 50721f8ecb60ff023bdccc1873ec1e20ee0b21a0 feat: new feature 2
Commits in main not in develop (1)
- f7bb9d2af7763e0a311099e880e8bf7d6b51bf4d fix: urgent hotfix
```
## Conclusion
`git` is the tool that every programmer should know to do collaborative work (not only, `git` is also very powerful even when working alone) and keep track of changes across a set of files.