Gitは大事。gitをもっと理解する【Day 90 of 100】

user@USERnoMacBook-Pro tutorial % git branch feature-A
user@USERnoMacBook-Pro tutorial % git branch
  feature-A
* main
user@USERnoMacBook-Pro tutorial % git checkout feature-A
Switched to branch 'feature-A'
user@USERnoMacBook-Pro tutorial % git branch
* feature-A
  main
user@USERnoMacBook-Pro tutorial % git checkout main
Switched to branch 'main'
Your branch is ahead of 'origin/main' by 6 commits.
  (use "git push" to publish your local commits)
user@USERnoMacBook-Pro tutorial % git branch
  feature-A
* main
user@USERnoMacBook-Pro tutorial % git checkout feature-A
Switched to branch 'feature-A'
user@USERnoMacBook-Pro tutorial % git branch
* feature-A
  main
user@USERnoMacBook-Pro tutorial % git add a.js
user@USERnoMacBook-Pro tutorial % git diff HEAD
diff --git a/git_basics/tutorial/a.js b/git_basics/tutorial/a.js
index ae17ca4..5599dae 100644
--- a/git_basics/tutorial/a.js
+++ b/git_basics/tutorial/a.js
@@ -2,3 +2,4 @@ console.log('A is edited');
 console.log('ほげほげ');
 console.log('まみまみ');
 console.log('ぷーぷー');
+console.log('feature-A');
user@USERnoMacBook-Pro tutorial % git commit -m "update to feature-A"
[feature-A 50a5899] update to feature-A
 1 file changed, 1 insertion(+)
user@USERnoMacBook-Pro tutorial % git checkout main
Switched to branch 'main'
Your branch is ahead of 'origin/main' by 6 commits.
  (use "git push" to publish your local commits)
user@USERnoMacBook-Pro tutorial % git branch
  feature-A
* main
user@USERnoMacBook-Pro tutorial % git checkout feature-A
Switched to branch 'feature-A'
user@USERnoMacBook-Pro tutorial % git checkout main   
Switched to branch 'main'
Your branch is ahead of 'origin/main' by 6 commits.
  (use "git push" to publish your local commits)
user@USERnoMacBook-Pro tutorial % git checkout -
Switched to branch 'feature-A'
user@USERnoMacBook-Pro tutorial % git checkout feature-A
Already on 'feature-A'
user@USERnoMacBook-Pro tutorial %