没有 -a 选项的 git commit 有什么影响？
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What is the effect of git commit without the -a option?
提问by ben
What is the difference between these two commands?
这两个命令有什么区别？
git commit -m "added a new page"
and
和
git commit -a -m "added a new page"
I know that the -a option will stage files that have been modified and deleted, but then what does running it without the -a mean?
我知道 -a 选项将暂存已修改和删除的文件，但是没有 -a 的情况下运行它意味着什么？
回答by John Weldon
You have to explicitly stage changes for commitment by using git addor git rm.
您必须使用git add或明确地为承诺进行更改git rm。
If you use the -aflag when doing a commit, git will automatically stage any modified and removed files without you having to explicitly stage them using addor rm, etc.
如果您在-a提交时使用该标志，git 将自动暂存任何修改和删除的文件，而无需您使用add或rm等明确暂存它们。
If you don'tspecify -a, any files that have been modified or removed, but not explicitly staged using git addor git rmwill be ignored in the commit.
如果未指定-a，则任何已修改或删除但未使用git add或显式暂存的文件git rm将在提交中被忽略。
update
更新
As Dr. Gianluigi Zane Zanettini says - -adoes not add newfiles to the index, so if you have completely new files you shouldn't expect -ato ad them.
正如 Gianluigi Zane Zanetini 博士所说 --a不会将新文件添加到索引中，因此如果您有全新的文件，则不应期望-a添加它们。
http://www.kernel.org/pub/software/scm/git/docs/git-commit.html
http://www.kernel.org/pub/software/scm/git/docs/git-commit.html
