Ignoring Files and Folders in Git

Git is a free and open-source distributed version control system designed to handle everything from small to very large projects with speed and efficiency. Git relies on the basis of distributed development of software where more than one developer may have access to the source code of a specific application and can modify changes to it that may be seen by other developers. So in this article, we will cover various concepts related to ignoring files and folders in the git. We will start the article by learning how to create the .gitignore file and how it works.

Creating .gitignore and knowing about its functionalities 

Creating .gitignore file

Using git status to show the status of files

Now we can see that there are a lot of files that are in untracked files and some of them are those files that are being staged already but there are no files that are being ignored. Sounds interesting so that means that there are ignored files also in git. So to ignore a file in git we use a .gitignore file inside that file you can mention whether you want a particular file to be ignored or a file ending with a specific extension. So here in this file, we can see that *.txt is mentioned which means that all the .txt files should be ignored in this directory.

Adding which files shouldn’t be added in …gitignore

Now we will use the git status –ignored the command to see all the ignored files present in the directory. 

Using git status –ignored to see the status of ignored files

Exceptions in a.gitignore file

So how do exceptions work in the .gitignore file is we can take the example of our *.txt which we wrote in our .gitignore file which means that all the .txt files should be ignored. Also, we can write !file_name.txt which means that the particular file shouldn’t be ignored. So here we can see when *.txt was mentioned in the .gitignore file all the .txt files were ignored in the directory.

Editing the .gitignore file with !file_name.txt

Adding the !file_name.txt in the .gitignore file after adding this we can see that the file is not in ignored files now and here you can see the file_name is a.txt which previously was coming in the ignored files and now we can see that now the file is in untracked files.

Seeing the changes after adding this !a.txt in the .gitignore file

So if there are some .txt files in some folder then that folder will be ignored and we cannot easily reinclude files from that folder so there is a procedure how to reinclude all those files from that folder because here according to .gitignore all the *.txt files should be ignored except a.txt.

Using git status –ignored

Here you can see the secrets folder is in the ignored files because according to the .gitignore all the *.txt files should be ignored. So to reinclude all the *.txt files from the secrets folder we have to first reinclude the secrets folder by writing !folder_name in the .gitignore here folder_name is secrets and then we have to ignore all the files present in the secrets folder by writing secrets/* in the .gitignore and then write !secrets/*.txt to reinclude all the .txt files from the secrets folder to remove the folder from and reinclude all the .txt files in the folder from ignored files. 

Editing .gitignore file

Using git status –ignored to see whether the folder is removed from the ignored files or not

Now if our use case is to remove those files whose file_names are beginning with ! in the .gitignore file then add one more ! or add \ in the front of your file_name or you can also remove a folder by this who is having some files which don’t want git to have a track on them. By using these exceptions in the a.gitignore file you will move these files and folders in the ignored files.

Editing .gitignore

Using git status –ignored to see the files are in ignored files or not

A Global .gitignore file

So if our use case is that if we want specific files to be ignored by git in all repositories then we can create a global .gitignore in any of the repositories and make it global using the following command: 

git config --global core.excludesfile path_of_global_gitignore_file

Here you can see the path should be complete that is the name_of_the_drive/folder_name/.gitignore to avoid errors like this warning: unable to access permission denied fatal: cannot use as an exclude file. Now git will use this in addition to each repository’s .gitignore file. So let us see the syntax of the command:

Showing the syntax of the command: git config –global core.excludes file path_of_global_gitignore_file

So now if we edit the global .gitignore file and write *.py then it will ignore all the *.py files present in our repository. Now let’s see how this works:

Editing the global .gitignore file

So now if we use the git status –ignored command we will see all the .py files in ignored files. 

Using git status –ignored

So now if we include all these *.py files in the local .gitignore file of our repository then what will happen because our global .gitignore file ignores all the .py files. Now the question here is who will take the priority so the answer to this is our local .gitignore file takes priority always whenever there is a file that is ignored by the global .gitignore file but is included by the local .gitignore file. So we will write !*.py in our local. .gitignore file will include all the files .py files and will not put them in ignored files.

Editing the local .gitignore file

So, now we can see all the py files are now in untracked files and there are no py files that are in ignored files.

Using git status –ignored command to see whether the py files are removed from the ignored  files or not

Ignore all the files that already have been committed to a Git repository

So now if we want a file that already has been committed to the git repository and now we want that git should stop tracking it for that type of use-case we can remove it using the following command:

git rm --cached file

This will remove the file from the repository and prevent any further changes from being tracked by Git. The –cached option will make sure that the file is not physically deleted. The previously added contents of this file will still be visible but keep in mind that if anyone else pulls from the repository after the file is being removed then their copy will be physically deleted. 

Before using git rm –cached status of the file

After Using git rm –cached file  

You can make git pretend that the working tree version of the file is up to date thus ignoring changes in it with the skip-worktree option using the command.

git update-index --skip-worktree file_name

Here we can see that readme.md is modified

Here we can see that after using the above command git is ignoring any changes being done in the readme.md

Here we can see by using this above command git is not able to track any further changes in the readme.md and ignore any changes being done in the readme.md. Now to have a track of the changes in the readme.md we can use the command git update-index –no-skip-worktree file_name.

Using the command git update-index –no-skip-worktree file_name

Now we can see that on using git status we can see that readme.md is being modified and some changes need to be staged for commit. Now if you want to force git to ignore any changes made in a  file then we can use the command.

git update-index --assume-unchanged file_name 

Using the above command so that git doesn’t ignore the file

Now if we want that git shouldn’t ignore the file and again take care of it. For this, we will use the command 

git update-index --no-assume-unchanged file_name 

Using the above command so that git doesn’t ignore the file

Ignoring files locally without committing ignore rules

If you want to ignore certain files in a repository locally and not make the file part of any repository, then we will edit the .git/info/exclude inside your repository. Here we will ignore a file say rock.py and now we can see that before editing the file .git/info/exclude git is showing us the file in untracked files.

Before editing the file .git/info/exclude

Editing the file .git/info/exclude

Using git status –ignored to see the status of rock.py

Now we can see that rock.py is in ignored files now.
 

Ignoring a file in any directory 

If we want to ignore a file in any directory we have to just write its name in the  .gitignore file whether in your global or local or it can be your .git/info/exclude of the repository according to your use case. If you want that in your particular repo only a particular file in a specific directory should be ignored then you can mention the name of that file in the local.gitignore file and if you want that all the repositories should ignore the file then you can write the name of that file in global .gitignore then the file would be ignored by all the repositories.

Mentioning the name of the file .gitignore

Using git status –ignored

Here you can see the file is now in ignored files and whatever the folders were containing that file is also ignored. Now if you want to ignore a certain file in a specific folder only then we can edit the .gitignore just like this: mainfolder_name/**/file_name. Here ** denotes subdirectories. The meaning of mainfolder_name/**/file_name this line is only the file contained in this folder or its subdirectories will be ignored. But if the file is at some other location of the repository with the same name then that will not be ignored.

Editing the .gitignore

Using git status –ignored

Now we can see that the cars.cpp file created in the main folder is in the untracked files and the file cars.cpp which is present in the testing folder and its subdirectories are ignored because in the .gitignore file it is written that testing/**/cars.cpp which means all the files with cars.cpp name should be ignored in the testing folder and its subdirectories or what we can do is create a local .gitignore file in the folder where want to ignore the file. Now what are we doing is creating a local .gitignore file in the folder where we are going to ignore the file. So what we have done is we have erased this line testing/**/cars.cpp from our local .gitignore file so that we can see the effect of the .gitignore file present in our folder testing which we have newly created.

Editing the local  .gitignore

Using git status –ignored command

Now you can see that on using git status –ignored command we are seeing that cars.cpp from the testing folder and its subdirectories are ignored. 

Prefilled .gitignore Templates

Create an Empty folder

It is not possible to add and commit an empty folder in the git so to achieve this we have two methods:

Method one: .gitkeep  

So for tracking an empty folder in git we will create an empty folder inside the repository and in that folder create an empty .gitkeep file which will register the folder to git and we will be able to track the empty folder.

Checking the status of empty folder gitisfun without a .gitkeep

So now we can see that the gitisfun folder is not having any .gitkeep file and without any .gitkeep file it is not being tracked by git.  So let’s create a .gitkeep file in an empty folder so that we can track an empty folder in git.

Creating .gitkeep file in the empty folder

Adding the empty folder in the staging area

So now we can see that the empty folder is now being tracked by git. There is one more method by which we can track the empty folder in git.

Method two: dummy.txt

So to track an empty folder in git using dummy.txt, we will create an empty folder in which we will create a dummy.txt file, and in that, you can insert any funny messages you want and now after creating this dummy.txt file in the empty folder we will be able to add the empty folder in the staging area.

Without dummy.txt the empty folder is not being tracked by git

Created dummy.txt in the empty folder and now we can see that the empty folder is now being tracked by git 

Here the name of the empty folder is batman. So these are the two methods by which we can track an empty folder in git. 

Finding files ignored by .gitignore

So now if you want to see all the files ignored by git in your repository or any of the directories present in the repository we can use the following command:

git status --ignored

Using git status –ignored command

So now if you want to list recursively ignored files in directories, we will be using an additional parameter  –untracked-files=all, and the command would be:

git status --ignored --untracked-files=all

Using git status –ignored –untracked-files=all

So now we can see that it is listing all the recursively ignored files in directories also.

Ignoring changes in tracked files

So now if you are thinking of ignoring changes in tracked files then you might think that why not to use .gitignore or .git/info/exclude and just mention the name of the file which we want to ignore but .gitignore and .git/info/exclude only works for ignoring untracked files. So to ignore a tracked file we use the following command git update-index –skip-worktree file_name. So here you can see that the file try.txt which is in tracked files is modified but now after applying the command: git update-index –skip-worktree file_name any changes done in the try.txt is being ignored by the git because of the command we used.

Modifying the file try.txt

Using the command git update-index –skip-worktree file_name

So now we can see that after applying the command git update-index –skip-worktree file_name the tracked file is being ignored and now if you want to revert this we can use the following command: git update-index –no-skip-worktree file_name so this command will again make the file to be tracked by git.

Using the command git update-index –no-skip-worktree file_name

We can also use the command git update-index –assume-unchanged file_name in alternative to git update-index –skip-worktree file_name both works the same and in alternative to the command git update-index –no-skip-worktree we can use git update-index –no-assume-unchanged file_name command.

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