file_is_text

Content is detected as text (magic bytes + UTF-8 validity check) — fails on binary files matched by paths.

Options

This rule takes no kind-specific options.

Plus the common paths, level, id, and when fields. This table is generated from the JSON Schema; option types and defaults are authoritative.

Example

A source file with a stray null byte

The rule fires on this repository:

src/
src/accidental_blob.rs
src/clean.rs

src/accidental_blob.rs

(binary content, 11 bytes)

src/clean.rs

pub fn ok() {}

With this .alint.yml:

version: 1
rules:
  - id: src-is-text
    kind: file_is_text
    paths: "src/**"
    level: error

alint check reports:

--- src/accidental_blob.rs -----------------------------------------------------
  x  error    src-is-text
              file is detected as binary; text is required here

Summary (1 violation):
  x 1 error
  0 passing * 1 failing

Every source file is UTF-8 text

This repository is compliant:

src/
src/lib.rs
src/main.rs

src/lib.rs

pub fn ok() {}

src/main.rs

fn main() {}

With this .alint.yml:

version: 1
rules:
  - id: src-is-text
    kind: file_is_text
    paths: "src/**"
    level: error

alint check reports:

v All 1 rule(s) passed.