Module: Pdfh::Utils::DependencyValidator

Defined in:
lib/pdfh/utils/dependency_validator.rb

Overview

Provides methods to validate external dependencies

Class Method Summary collapse

Class Method Details

.installed?(*apps) ⇒ Boolean

Validates if the required command-line applications are installed

Parameters:

  • apps (Array<String>) —

    names of required command-line applications

Returns:

  • (Boolean) —

    true if all applications are installed, false otherwise



14
15
16
17
18
19
20
21
22
23
24
25
26
 
# File 'lib/pdfh/utils/dependency_validator.rb', line 14

def installed?(*apps)
  missing = apps.filter_map do |app|
    _stdout, _stderr, status = Open3.capture3("which #{app}")

    app.to_s unless status.success?
  end

  if missing.any?
    errors = missing.map(&:red)
    puts "Required dependency #{errors.join(", ")} not found. Please install it before continuing."
  end
  missing.empty?
end

.missing?(*apps) ⇒ Boolean

Returns true if any application is missing, false if all are installed.

Parameters:

Returns:

  • (Boolean) —

    true if any application is missing, false if all are installed



30
31
32
 
# File 'lib/pdfh/utils/dependency_validator.rb', line 30

def missing?(*apps)
  !installed?(*apps)
end