git addコマンドでUntracked files（未追跡ファイル）を除いてaddする方法
git addコマンドでUntracked files（未追跡ファイル）を除いてaddするには-uオプションを指定します。
オプションの説明
-u, --update
Update the index just where it already has an entry matching . This removes as well as modifies index entries to match the working tree, but
adds no new files.
If no is given when -u option is used, all tracked files in the entire working tree are updated (old versions of Git used to limit the update
to the current directory and its subdirectories).
-uオプションを指定した場合
$ git status
On branch master
Your branch is up to date with 'origin/master'.
Changes not staged for commit:
(use "git add/rm ..." to update what will be committed)
(use "git restore ..." to discard changes in working directory)
deleted: COPYING
modified: Makefile
modified: README.md
modified: SECURITY.md
Untracked files:
(use "git add ..." to include in what will be committed)
test.txt
no changes added to commit (use "git add" and/or "git commit -a")
$ git add -u
$ git status
On branch master
Your branch is up to date with 'origin/master'.
Changes to be committed:
(use "git restore --staged ..." to unstage)
deleted: COPYING
modified: Makefile
modified: README.md
modified: SECURITY.md
Untracked files:
(use "git add ..." to include in what will be committed)
test.txt
-uオプションを指定しない場合
$ git status
On branch master
Your branch is up to date with 'origin/master'.
Changes not staged for commit:
(use "git add/rm ..." to update what will be committed)
(use "git restore ..." to discard changes in working directory)
deleted: COPYING
modified: Makefile
modified: README.md
modified: SECURITY.md
Untracked files:
(use "git add ..." to include in what will be committed)
test.txt
no changes added to commit (use "git add" and/or "git commit -a")
$ git add .
$ git status
On branch master
Your branch is up to date with 'origin/master'.
Changes to be committed:
(use "git restore --staged ..." to unstage)
deleted: COPYING
modified: Makefile
modified: README.md
modified: SECURITY.md
new file: test.txt
