Ignore files that have already been committed to a Git repository
This question already has an answer here:
To untrack a single file that has already been added/initialized to your repository, ie, stop tracking the file but not delete it from your system use: git rm --cached filename
To untrack every file that is now in your .gitignore :
First commit any outstanding code changes , and then, run this command:
git rm -r --cached .
This removes any changed files from the index(staging area), then just run:
git add .
Commit it:
git commit -m ".gitignore is now working"
To undo git rm --cached filename , use git add filename .
If you are trying to ignore changes to a file that's already tracked in the repository (eg a dev.properties file that you would need to change for your local environment but you would never want to check in these changes) than what you want to do is:
git update-index --assume-unchanged <file>
If you wanna start tracking changes again
git update-index --no-assume-unchanged <file>
See git-update-index(1) Manual Page.
Also have a look at the skip-worktree and no-skip-worktree options for update-index if you need this to persist past a git-reset (via)
Update: Since people have been asking, here's a convenient (and updated since commented on below) alias for seeing which files are currently "ignored" (--assume-unchanged) in your local workspace
$ git config --global alias.ignored = !git ls-files -v | grep "^[[:lower:]]"
为了untrack已经被添加/初始化到存储库文件，即停止跟踪该文件，但不能从您的系统使用的删除： git rm --cached filename
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