file_footer

The configured number of final lines in each file in scope must match a regex. Mirror of file_header anchored at the end of the file. Use for license footers, signed-off-by trailers, generated-file sentinels.

As in file_header, the lines are one string, newlines included, so $ matches only after the final newline: end a pattern with \s*$, or use (?m), to match the last line. See Regex patterns and anchors.

Fix: file_append — append a declared content. With no fix declared, violations are unfixable.

Options

Option	Type	Required	Default	Description
lines	integer (>= 1)		20	Number of trailing lines to consider.
pattern	string	yes		Rust regex. The last lines lines of each file must match. They are one string, newlines included, so ^ and $ anchor to the block's start and end unless the pattern turns on (?m).

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

Example

A file missing its license footer

The rule fires on this repository:

• src/
• src/missing.rs⚠

  ⚠ warning license-footer

  last 3 line(s) do not match required footer /Licensed under the Apache License/

• src/ok.rs✓

src/missing.rs

fn b() {}
// no footer here

src/ok.rs

fn a() {}
// Licensed under the Apache License, Version 2.0

With this .alint.yml:

version: 1
rules:
  - id: license-footer
    kind: file_footer
    paths: "src/**/*.rs"
    pattern: "Licensed under the Apache License"
    lines: 3
    level: warning

alint check reports:

--- src/missing.rs -------------------------------------------------------------
  !  warning  license-footer
              last 3 line(s) do not match required footer /Licensed under the
              Apache License/

Summary (1 violation):
  ! 1 warning
  0 passing * 1 failing

Every file ends with the license footer

This repository is compliant:

• src/
• src/a.rs✓
• src/b.rs✓

src/a.rs

fn a() {}

// Licensed under the Apache License, Version 2.0

src/b.rs

fn b() {}
// Licensed under the Apache License, Version 2.0

With this .alint.yml:

version: 1
rules:
  - id: license-footer
    kind: file_footer
    paths: "src/**/*.rs"
    pattern: "Licensed under the Apache License"
    lines: 3
    level: warning

alint check reports:

v All 1 rule(s) passed.