xml_path_absent

Assert a JSONPath query over the document matches nothing; one file-level violation if present.

Semantics:

The query must select zero nodes. Any match fires exactly one violation for the file — never per-match, so a $[?…] filter that fans out over every top-level key still yields a single violation.
The existence sibling of the value-checking kinds; mirrors file_absent for a path. equals / matches / if_present don't apply.
Useful for forbidding a key: a postinstall script in package.json, a [patch] table in Cargo.toml, or write-all permissions in a workflow.

Options

Option	Type	Required	Default	Description
`path`	string	yes		`JSONPath` expression rooted at `$`. The rule fires one violation per file if the query matches any node (the path must be absent).

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 .csproj that opts into unsafe code

The rule fires on this repository:

App.csproj
✗ error no-unsafe-blocks
Project enables AllowUnsafeBlocks; unsafe code bypasses the memory guarantees the rest of the codebase relies on.

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net8.0</TargetFramework>
    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
  </PropertyGroup>
</Project>

With this .alint.yml:

version: 1
rules:
  - id: no-unsafe-blocks
    kind: xml_path_absent
    paths: "*.csproj"
    path: "$.Project.PropertyGroup.AllowUnsafeBlocks"
    level: error
    message: >-
      Project enables AllowUnsafeBlocks; unsafe code bypasses the memory
      guarantees the rest of the codebase relies on.

alint check reports:

--- App.csproj -----------------------------------------------------------------
  x  error    no-unsafe-blocks
              Project enables AllowUnsafeBlocks; unsafe code bypasses the memory
              guarantees the rest of the codebase relies on.

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

A .csproj that stays safe

This repository is compliant:

App.csproj✓

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net8.0</TargetFramework>
  </PropertyGroup>
</Project>