Generate .gitignore from project structure
Select language, Framework, IDE, and OS to generate a .gitignore that combines existing Rules and custom Patterns in the Browser.
Open the .gitignore generation toolConclusion: Check tracked status first; if untracked, inspect the pattern and location
If git ls-files -- path produces output, it is tracked. If it is untracked, use git check-ignore -v path to identify the matching source and rule.
Because the Tool does not read Git Repositories, check tracking status and actual matches on your device.
Files force-added with git add -f are also tracked, so an ignore rule alone will not remove them.
Isolate causes from top to bottom
Check tracking status, Rules, placement hierarchy, subsequent ! rules, parent-child .gitignore files, Global Rules, and actual File names.
On Windows, also check that hidden extensions have not made the file .gitignore.txt.
| Item | Confirmation details | judgment |
|---|---|---|
| Tracked | git ls-files | Match indexes when output exists |
| Match | git check-ignore -v | Source and line number |
| Placement | Directory for .gitignore | Relative base |
| Negation | Subsequent !Rule | Check order |
| Filename | Not named .gitignore.txt | Extension display |
How to create rules with the .gitignore generator
- Load the current Rule into the Tool.
- Check the selected Template and custom Rule.
- Read the conflict warnings in the generated result.
- Place it in the Repository.
- Use git check-ignore -v to determine the actual result.
Tool warnings provide basic conflict detection. This is not a Git-compatible Checker.
Diagnostic command
git status --ignored
git ls-files -- path/to/file
git check-ignore -v --no-index path/to/fileTracked Files are not untracked simply by adding them to .gitignore
.gitignore applies to files that you intentionally do not track. Files already registered in the index remain tracked even after you add a rule. To keep a file in the working tree while removing only its index entry, use git rm --cached with a narrowly scoped target.
git ls-files -- .env
git rm --cached .env
git statusDirectories require -r. Do not initially recommend broad `git rm -r --cached .`; first specify the target path and check staged changes with git status.
Find the rule that actually matched with git check-ignore
git check-ignore -v path/to/file
git status --ignoredgit check-ignore -v shows which pattern on which line of which ignore source matched the path. Tracked files are normally outside the scope of this check, so if nothing is shown, also check tracking status with git ls-files. Warnings in generation tools are simplified analysis and are not a substitute for this command.
Check the symbols and listed order in the Pattern.
| Pattern | meaning | example |
|---|---|---|
| * | Zero or more characters other than Slash | *.log |
| ? | Any single character other than Slash | file?.txt |
| [] | Character Set / Range | file[0-9].txt |
| / | Limit by location or directory | /dist/ |
| ** | Special matches that span multiple hierarchy levels | **/cache/ |
| ! | Reinclude exclusions made up to just before | !important.log |
| # | Comment at the beginning of a line | # Build outputs |
At the same priority level, the last matching pattern determines the result. The order of placing “!important.log” after “*.log” is meaningful, so do not casually sort alphabetically. If the parent directory itself is excluded, its contents are not traversed, so an inner file may not be restorable with a simple ! pattern.
What DevelopTools' .gitignore generator can do
| Function | Current tool specification |
|---|---|
| template | Java, Node.js, React / Next.js, Vue / Nuxt, TypeScript, Python, Django / Flask, C# / .NET, PHP / Laravel, Rust, C / C++, Ruby / Rails, Swift, Android, Unity, and others |
| Build, IDE, and OS | Gradle, Maven, CMake, Terraform, Docker, VS Code, JetBrains, Visual Studio, Eclipse, Vim / Emacs, Windows, macOS, Linux |
| Input | Read one existing .gitignore file and add custom patterns as text |
| Integration | Add to or replace existing content. Deduplicate exactly matching rules and retain the original entry order |
| warning | Overly broad rules such as "*", absolute paths, exclusion or negation conflicts for the same target, and missing .env or private-key rules |
| output | Editable result, rule count, duplicate-removal count, warnings, copy, and download with the filename “.gitignore” |
| Unsupported | Git-compatible pattern checker, running git check-ignore, Git operations, automatic nested .gitignore generation, and automatic synchronization with official templates |
| Processing scope | Process selected content, existing files, and generated results in the browser without sending them externally |
The tool only generates and combines rule text. It does not run git add, git rm, git commit, or git push. After generation, run git status, git check-ignore -v, and, if needed, git ls-files in the target repository to confirm Git's actual decisions.
A Secret already pushed cannot be resolved by .gitignore alone.
Even if you add .env, passwords, API keys, or private keys to .gitignore after committing or pushing them, they may remain accessible through past history or clones. First revoke or rotate the credentials, then update the services and automation that use them.
- Revoke and reissue the leaked credentials
- Stop future tracking with git rm --cached, then add an appropriate pattern to .gitignore
- Evaluate the necessity, perform a history rewrite, and adjust collaborators and forks as well.
- Do not put values in .env.example or similar files; share only the required variable names.
History Rewrite has side effects such as changed commit hashes, reintroduction of data, and loss of other developers' work. Do not treat it as “complete removal with a single command”; follow GitHub's official procedure and the team's practices.
Check patterns and templates using primary sources
- Official Git: gitignore Documentation
- Official Git: git rm Documentation
- Official Git: git check-ignore Documentation
- GitHub Docs：Ignoring files
- Official GitHub: github/gitignore templates
- GitHub Docs：Removing sensitive data
Language and framework generated output changes by version. Start with DevelopTools built-in templates, then check the GitHub official template collection and current documentation for the framework in use before applying changes to the repository.
Example: identify why .env is not ignored
Investigate why .env remains in git status even after adding it to .gitignore.
If git ls-files shows that it is tracked, remove it from the index, then use git check-ignore to verify the .env rule.
- git status
- git ls-files
- git rm --cached
- git check-ignore -v
- Run git status again
Do not display or share a .env file containing real values; pass only its path to the command.
Frequently asked questions
- Does generating .gitignore automatically apply it to Git?
- No. It only generates Text in the Browser. Place it in the Repository Root and check with git status and git check-ignore.
- Are selections and loaded .gitignore files sent externally?
- The current Tool processes File loading, merging, warnings, Copy, and Download in the Browser without sending data to external APIs.
- Is it exactly identical to the official GitHub template?
- It is not fully automated synchronization. Check the built-in Rules, and compare the latest official GitHub Templates and Framework documentation.