git configuration_error ai_generated true

.gitignore rule has no effect on already-tracked file

ID: git/gitignore-tracked-file

Also available as: JSON · Markdown
96%Fix Rate
97%Confidence
200Evidence
2016-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
2 active — — —

Root Cause

.gitignore only prevents untracked files from being added. Once a file is tracked by git (i.e., has been committed), adding it to .gitignore has no effect. The file must be explicitly removed from git's index while keeping it on disk.

generic

Workarounds

  1. 98% success Remove from index with git rm --cached, then commit 
    Run 'git rm --cached <file>' (or 'git rm --cached -r <directory>' for directories). This removes the file from git's tracking index but keeps it on your local disk. Then commit the change. The file will now be properly ignored by .gitignore. WARNING: This creates a commit that deletes the file from git, so other developers will see the file deleted when they pull.

    Sources: https://git-scm.com/docs/git-rm

  2. 88% success Use git update-index --skip-worktree for local-only ignore 
    Run 'git update-index --skip-worktree <file>'. This tells git to pretend the file hasn't changed locally, even if it has. Unlike --assume-unchanged, --skip-worktree survives most git operations. It's local-only and won't affect other developers. Undo with '--no-skip-worktree'.

    Sources: https://git-scm.com/docs/git-update-index

  3. 95% success Bulk-remove all gitignored tracked files 
    Run 'git rm --cached $(git ls-files -i -c --exclude-from=.gitignore)' to remove all currently tracked files that match .gitignore patterns. Review the list with 'git ls-files -i -c --exclude-from=.gitignore' first. Then commit.

    Sources: https://git-scm.com/docs/git-ls-files

Dead Ends

Common approaches that don't work:

  1. Adding the file to .gitignore and expecting git to stop tracking it 99% fail

    .gitignore only applies to untracked files. Once a file has been added to git's index (via git add and commit), .gitignore rules are completely ignored for that file. Git will continue tracking modifications to the file regardless of any gitignore patterns.

  2. Deleting the file, committing, then recreating it expecting gitignore to take effect 60% fail

    If you delete the file via 'rm' and commit the deletion, then recreate the file, .gitignore WILL work. But this approach removes the file from all other clones when they pull, which may break teammates' configurations. It also loses the file's git history permanently.

  3. Using git update-index --assume-unchanged to hide tracked files 70% fail

    assume-unchanged is a performance hint for git, NOT a proper ignore mechanism. It tells git to skip stat() calls for the file, but git reset, git checkout, and git pull will still overwrite local changes. It's also local-only (not shared with other developers) and can silently revert. Use --skip-worktree instead if you must use this approach.

Error Chain

Leads to:
Frequently confused with: