> ## Documentation Index > Fetch the complete documentation index at: https://docs.trunk.io/llms.txt > Use this file to discover all available pages before exploring further. # Code Quality ### trunk check `trunk check`: Universal code checker. #### **Usage** **example** ``` trunk check [options] ``` #### Filtering options * `-a, --all`: Check all files instead of only changed files * `--sample`: Run each linter on N files * `--filter`: Comma-separated list of linters and/or issue codes to include or exclude * `--exclude`: Shorthand for an inverse --filter * `--scope`: Scope of checks to run \{all | security} * `--ignore`: Glob pattern to exclude files from linting * `--force`: Run on all files, even if ignored * `--include-existing-autofixes`: Include existing issues that can be autofixed #### **CI** options * `--ci`: Run in non-interactive mode designed for CI environments * `-j`, `--jobs`: Number of concurrent jobs #### Git Hooks options * `--index`: Run linter on git-indexed files * `--index-file`: Run linter on git-indexed files based on specified index * `--commit-ref`: Commit ref to lint (instead of current working tree) * `--commit-ref-from-pre-push`: Commit ref to lint from the stdin of a pre-push git hook (instead of the current working tree) #### Output options * `--show-existing`: Show existing issues otherwise hidden by * `--print-failures`: Print any failures that occur * `--diff`: Diff printing mode \{none | compact | full} * `-v, --verbose`: Show verbose output for debugging purposes * `--debug`: Show debug output #### Behavior options * `-y, --fix`: Automatically apply all fixes without prompting * `-n, --no-fix`: Don't automatically apply fixes * `--cache`: Disable to skip cache for all check actions * `--ignore-git-state`: Run linters even if a merge, rebase, or revert is in progress * `--upstream`: Upstream branch used to compute changed files ### Trunk Check Enable Linter `trunk check enable`: Enable linters for trunk check. #### **Usage** **example** ``` trunk check enable [options] ``` ### Trunk Check Disable Linter `trunk check disable`: Disable linters for trunk check. #### **Usage** **example** ``` trunk check disable [options] ``` ### Trunk Check List Linters `trunk check list`: List linters for trunk check. #### **Usage** **example** ``` trunk check list [options] ``` ### Trunk Check Run Format `trunk fmt`: List linters for trunk check. #### **Usage** **example** ``` trunk fmt [options] ``` #### **Options** #### Filtering options * `-a, --all`: Check all files instead of only changed files * `--filter`: Comma-separated list of linters and/or issue codes to include or exclude * `--exclude`: Shorthand for an inverse --filter * `--scope`: Scope of checks to run \{all | security} * `--ignore`: Glob pattern to exclude files from linting * `--force`: Run on all files, even if ignored * `--show-existing`: Show existing issues otherwise hidden by [hold-the-line](/code-quality/overview#hold-the-line) * `--ignore-git-state`: Run linters even if a merge, rebase, or revert is in progress #### Git Hooks options * `--index`: Run linter on git-indexed files * `--index-file`: Run linter on git-indexed files based on specified index * `--commit-ref`: Commit ref to lint (instead of current working tree) * `--commit-ref-from-pre-push`: Commit ref to lint from the stdin of a pre-push git hook (instead of the current working tree) #### Output options * `--show-existing`: Show existing issues otherwise hidden by * `--print-failures`: Print any failures that occur * `--diff`: Diff printing mode \{none | compact | full} * `-v, --verbose`: Show verbose output for debugging purposes * `--debug`: Show debug output #### Behavior options * `-y, --fix`: Automatically apply all fixes without prompting * `-n, --no-fix`: Don't automatically apply fixes * `--cache`: Disable to skip cache for all check actions * `--ignore-git-state`: Run linters even if a merge, rebase, or revert is in progress * `--upstream`: Upstream branch used to compute changed files * `-j`, `--jobs`: Number of concurrent jobs ## Advanced Trunk Check features | Options & Flags | Explanation | | -------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | `--root` | Explicitly set the root of the repository to run against | | `--upstream` | Specify the upstream branch used to calculate new vs existing issued. | | `--trigger` | Supports running trunk check from inside a git hook. Options are manual (default), git-push, git-commit. Controls whether the check returns early and its interactivity. | | `--output=format` | Output results in specified format: `text` (default) or `json` | | `--output-file=FILE` | Write json results to specified file | #### --filter `--filter` argument allows you to restrict `trunk check` to a subset of the linters enabled in your repository. For example, to run `eslint` and `isort` on the entire repo: ```bash theme={null} trunk check --all --filter=eslint,isort ``` Alternatively, to run every linter *except* `clang-tidy` and `shellcheck`: ```bash theme={null} trunk check --all --filter=-clang-tidy,-shellcheck ``` #### --sample `--sample=N` will attempt to run every enabled linter against the requested number of files. The goal of the `sample` flag is to test the setup of the linters in your repository as well as any specific configuration they might honor. The sample command will attempt to run each linter N times, but may run fewer if not enough applicable files exist in your set of files to lint. `--sample=N` can be combined with any other set of options for `trunk check`. For example, to run `prettier` against 10 different prettier supported files: ```bash theme={null} trunk check --sample=10 --filter=prettier ``` Alternatively, to run every linter at most 5 times against its supported files: ```bash theme={null} trunk check --sample=5 ```