Class: Stable::Validators::AppName

Inherits:
Object
  • Object
show all
Defined in:
lib/stable/validators/app_name.rb

Overview

Validates and normalizes Rails application names

Constant Summary collapse

VALID_PATTERN = 
/\A[a-z0-9]+(-[a-z0-9]+)*\z/
MAX_LENGTH = 
63

Class Method Summary collapse

Class Method Details

.call!(name) ⇒ Object 



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# File 'lib/stable/validators/app_name.rb', line 10

def self.call!(name)
  normalized = normalize(name)

  unless valid?(normalized)
    raise Thor::Error, <<~MSG
      Invalid app name: "#{name}"

      Use only:
        - lowercase letters (a-z)
        - numbers (0-9)
        - hyphens (-)

      Rules:
        - no spaces or underscores
        - cannot start or end with a hyphen
        - max #{MAX_LENGTH} characters

      Example:
        stable new my-app
    MSG
  end

  normalized
end

.normalize(name) ⇒ Object 



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# File 'lib/stable/validators/app_name.rb', line 35

def self.normalize(name)
  name
    .downcase
    .strip
    .gsub(/\s+/, '-') # spaces → hyphens
    .gsub(/[^a-z0-9-]/, '') # drop invalid chars
    .gsub(/-+/, '-')        # collapse hyphens
    .gsub(/\A-|-+\z/, '')   # trim hyphens
end

.valid?(name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/stable/validators/app_name.rb', line 45

def self.valid?(name)
  name.length <= MAX_LENGTH && VALID_PATTERN.match?(name)
end