# Shellcheck Processor
## Purpose
Lints shell scripts using [shellcheck](https://www.shellcheck.net/).
## How It Works
Discovers `.sh` and `.bash` files in the project (excluding common build tool
directories), runs `shellcheck` on each file, and records success in the cache.
A non-zero exit code from shellcheck fails the product.
This processor supports batch mode, allowing multiple files to be checked in a
single shellcheck invocation for better performance.
## Source Files
- Input: `**/*.sh`, `**/*.bash`
- Output: none (linter)
## Configuration
```toml
[processor.shellcheck]
command = "shellcheck" # The shellcheck command to run
args = [] # Additional arguments to pass to shellcheck
dep_inputs = [] # Additional files that trigger rebuilds when changed
```
| `command` | string | `"shellcheck"` | The shellcheck executable to run |
| `args` | string[] | `[]` | Extra arguments passed to shellcheck |
| `dep_inputs` | string[] | `[]` | Extra files whose changes trigger rebuilds |
## Batch support
The tool accepts multiple files on the command line. When batching is enabled (default), rsconstruct passes all files in a single invocation for better performance.
## Clean behavior
This processor is a Checker — `rsconstruct clean outputs` is a no-op for it (checkers produce no outputs). See [Clean behavior](../processors.md#clean-behavior) and [`rsconstruct clean`](../commands.md#rsconstruct-clean).