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version control - How do you make Git ignore files without using .gitignore?

Due to external weird constraints I cannot modify the .gitignore of my repository. Is there a way to ignore files and directories other than modifying a .gitignore? Even if it is a global solution like a global configuration that will be applied to all my repositories.

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Do not forget, according to gitignore, that there is an order of precedence in the different "ignore pattern sources" that Git consider:

  • Patterns read from the command line for those commands that support them.
  • Patterns read from a .gitignore file in the same directory as the path, or in any parent directory, with patterns in the higher level files (up to the root) being overridden by those in lower level files down to the directory containing the file.
  • Patterns read from $GIT_DIR/info/exclude.
  • Patterns read from the file specified by the configuration variable core.excludesfile.

The last two can be a solution for your problem but:

  • they are not replicated for a distant repository
  • they can have their patterns overridden by the other sources

(See also this SO question)


The other two solutions involve updating the index (git update-index):

However, when you checkout another branch or when you git pull, that "ignore" status might be reset. Hence the other option:

The difference between the two is explained in "Git - Difference Between 'assume-unchanged' and 'skip-worktree'".


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