codeowners-validator

A Ruby CLI tool for validating GitHub CODEOWNERS files.

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Requirements

• Ruby must be installed
• A CODEOWNERS file must exist

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Usage

codeowners-validator <subcommand> [options] [CODEOWNERS_PATH]

CODEOWNERS_PATH を省略した場合、カレントディレクトリの CODEOWNERS を使用します。

Subcommands

Subcommand	Description
duplicate	Detect duplicate pattern definitions
ghost	Detect patterns pointing to non-existent files or directories
uncovered	Detect files not covered by any CODEOWNERS pattern

Options

Option	Description
-q, --quiet	Suppress output; communicate results via exit status only

Exit status: 0 = ok / 1 = issues found

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duplicate — Detect duplicate definitions

Checks if the same path pattern appears in multiple lines.

codeowners-validator duplicate CODEOWNERS

Duplicate CODEOWNERS entries detected:
/app/models
- @team-a at lines 10
- @team-b at lines 25
Total duplicate groups: 1

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ghost — Detect patterns pointing to non-existent paths

Reports patterns in CODEOWNERS that do not match any actual file or directory.

codeowners-validator ghost CODEOWNERS

Ghost CODEOWNERS patterns detected:
/lib/does_not_exist/foo.rb @owner at line 3
/no/such/dir/ @owner at line 6
Total ghost patterns: 2

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uncovered — Detect files missing CODEOWNERS coverage

Reports files in the repository that do not match any CODEOWNERS pattern. The .git/ directory is excluded by default.

codeowners-validator uncovered CODEOWNERS

Uncovered files detected:
- config/settings.yml
- scripts/deploy.sh
Total uncovered files: 2

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Testing

bundle install
bundle exec rspec