Class: Overcommit::Configuration

Inherits:
Object
  • Object
show all
Defined in:
lib/overcommit/configuration.rb

Overview

Stores configuration for Overcommit and the hooks it runs.

Instance Method Summary collapse

Constructor Details

#initialize(hash, options = {}) ⇒ Configuration

Creates a configuration from the given hash.


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# File 'lib/overcommit/configuration.rb', line 15

def initialize(hash, options = {})
  @options = options.dup
  @options[:logger] ||= Overcommit::Logger.silent
  @hash = hash # Assign so validator can read original values
  unless options[:validate] == false
    @hash = Overcommit::ConfigurationValidator.new.validate(self, hash, options)
  end
end

Instance Method Details

#==(other) ⇒ Object


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# File 'lib/overcommit/configuration.rb', line 24

def ==(other)
  super || @hash == other.hash
end

#[](key) ⇒ Array, ...

Access the configuration as if it were a hash.


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# File 'lib/overcommit/configuration.rb', line 32

def [](key)
  @hash[key]
end

#all_builtin_hook_configsHash

Returns configuration for all built-in hooks in each hook type.


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# File 'lib/overcommit/configuration.rb', line 72

def all_builtin_hook_configs
  hook_configs = {}

  Overcommit::Utils.supported_hook_type_classes.each do |hook_type|
    hook_names = @hash[hook_type].keys.reject { |name| name == 'ALL' }

    hook_configs[hook_type] = Hash[
      hook_names.map do |hook_name|
        [hook_name, for_hook(hook_name, hook_type)]
      end
    ]
  end

  hook_configs
end

#all_hook_configsHash

Returns configuration for all hooks in each hook type.


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# File 'lib/overcommit/configuration.rb', line 65

def all_hook_configs
  smart_merge(all_builtin_hook_configs, all_plugin_hook_configs)
end

#all_plugin_hook_configsHash

Returns configuration for all plugin hooks in each hook type.


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# File 'lib/overcommit/configuration.rb', line 91

def all_plugin_hook_configs
  hook_configs = {}

  Overcommit::Utils.supported_hook_types.each do |hook_type|
    hook_type_class_name = Overcommit::Utils.camel_case(hook_type)

    directory = File.join(plugin_directory, hook_type.tr('-', '_'))
    plugin_paths = Dir[File.join(directory, '*.rb')].sort

    hook_names = plugin_paths.map do |path|
      Overcommit::Utils.camel_case(File.basename(path, '.rb'))
    end

    hook_configs[hook_type_class_name] = Hash[
      hook_names.map do |hook_name|
        [hook_name, for_hook(hook_name, Overcommit::Utils.camel_case(hook_type))]
      end
    ]
  end

  hook_configs
end

#apply_environment!(hook_context, env) ⇒ Object

Applies additional configuration settings based on the provided environment variables.


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# File 'lib/overcommit/configuration.rb', line 157

def apply_environment!(hook_context, env)
  skipped_hooks = "#{env['SKIP']} #{env['SKIP_CHECKS']} #{env['SKIP_HOOKS']}".split(/[:, ]/)
  only_hooks = env.fetch('ONLY') { '' }.split(/[:, ]/)
  hook_type = hook_context.hook_class_name

  if only_hooks.any? || skipped_hooks.include?('all') || skipped_hooks.include?('ALL')
    @hash[hook_type]['ALL']['skip'] = true
  end

  only_hooks.select { |hook_name| hook_exists?(hook_context, hook_name) }.
             map { |hook_name| Overcommit::Utils.camel_case(hook_name) }.
             each do |hook_name|
    @hash[hook_type][hook_name] ||= {}
    @hash[hook_type][hook_name]['skip'] = false
  end

  skipped_hooks.select { |hook_name| hook_exists?(hook_context, hook_name) }.
                map { |hook_name| Overcommit::Utils.camel_case(hook_name) }.
                each do |hook_name|
    @hash[hook_type][hook_name] ||= {}
    @hash[hook_type][hook_name]['skip'] = true
  end
end

#concurrencyObject


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# File 'lib/overcommit/configuration.rb', line 42

def concurrency
  @concurrency ||=
    begin
      cores = Overcommit::Utils.processor_count
      content = @hash.fetch('concurrency') { '%<processors>d' }
      if content.is_a?(String)
        concurrency_expr = content % { processors: cores }

        a, op, b = concurrency_expr.scan(%r{(\d+)\s*([+\-*\/])\s*(\d+)})[0]
        if a
          a.to_i.send(op, b.to_i)
        else
          concurrency_expr.to_i
        end
      else
        content.to_i
      end
    end
end

#enabled_ad_hoc_hooks(hook_context) ⇒ Object

Returns the ad hoc hooks that have been enabled for a hook type.


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# File 'lib/overcommit/configuration.rb', line 123

def enabled_ad_hoc_hooks(hook_context)
  @hash[hook_context.hook_class_name].keys.
    reject { |hook_name| hook_name == 'ALL' }.
    select { |hook_name| ad_hoc_hook?(hook_context, hook_name) }.
    select { |hook_name| hook_enabled?(hook_context, hook_name) }
end

#enabled_builtin_hooks(hook_context) ⇒ Object

Returns the built-in hooks that have been enabled for a hook type.


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# File 'lib/overcommit/configuration.rb', line 115

def enabled_builtin_hooks(hook_context)
  @hash[hook_context.hook_class_name].keys.
    reject { |hook_name| hook_name == 'ALL' }.
    select { |hook_name| built_in_hook?(hook_context, hook_name) }.
    select { |hook_name| hook_enabled?(hook_context, hook_name) }
end

#for_hook(hook, hook_type = nil) ⇒ Object

Returns a non-modifiable configuration for a hook.


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# File 'lib/overcommit/configuration.rb', line 131

def for_hook(hook, hook_type = nil)
  unless hook_type
    components = hook.class.name.split('::')
    hook = components.last
    hook_type = components[-2]
  end

  # Merge hook configuration with special 'ALL' config
  hook_config = smart_merge(@hash[hook_type]['ALL'], @hash[hook_type][hook] || {})

  # Need to specially handle `enabled` option since not setting it does not
  # necessarily mean the hook is disabled
  hook_config['enabled'] = hook_enabled?(hook_type, hook)

  hook_config.freeze
end

#merge(config) ⇒ Object

Merges the given configuration with this one, returning a new Overcommit::Configuration. The provided configuration will either add to or replace any options defined in this configuration.


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# File 'lib/overcommit/configuration.rb', line 151

def merge(config)
  self.class.new(smart_merge(@hash, config.hash))
end

#plugin_directoryObject

Returns absolute path to the directory that external hook plugins should be loaded from.


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# File 'lib/overcommit/configuration.rb', line 38

def plugin_directory
  File.join(Overcommit::Utils.repo_root, @hash['plugin_directory'] || '.git-hooks')
end

#plugin_hook?(hook_context_or_type, hook_name) ⇒ Boolean


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# File 'lib/overcommit/configuration.rb', line 181

def plugin_hook?(hook_context_or_type, hook_name)
  hook_type_name =
    if hook_context_or_type.is_a?(String)
      Overcommit::Utils.snake_case(hook_context_or_type)
    else
      hook_context_or_type.hook_type_name
    end
  hook_name = Overcommit::Utils.snake_case(hook_name)

  File.exist?(File.join(plugin_directory, hook_type_name, "#{hook_name}.rb"))
end

#previous_signature?true, false

Return whether a previous signature has been recorded for this configuration.


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# File 'lib/overcommit/configuration.rb', line 205

def previous_signature?
  !stored_signature.empty?
end

#signature_changed?true, false

Return whether the signature for this configuration has changed since it was last calculated.


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# File 'lib/overcommit/configuration.rb', line 197

def signature_changed?
  signature != stored_signature
end

#update_signature!Object

Update the currently stored signature for this hook.


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# File 'lib/overcommit/configuration.rb', line 234

def update_signature!
  result = Overcommit::Utils.execute(
    %w[git config --local] + [signature_config_key, signature]
  )

  verify_signature_value = @hash['verify_signatures'] ? 1 : 0
  result &&= Overcommit::Utils.execute(
    %W[git config --local #{verify_signature_config_key} #{verify_signature_value}]
  )

  unless result.success?
    raise Overcommit::Exceptions::GitConfigError,
          "Unable to write to local repo git config: #{result.stderr}"
  end
end

#verify_signatures?true, false

Returns whether this configuration should verify itself by checking the stored configuration for the repo.


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# File 'lib/overcommit/configuration.rb', line 213

def verify_signatures?
  return false if ENV['OVERCOMMIT_NO_VERIFY']
  return true if @hash['verify_signatures'] != false

  result = Overcommit::Utils.execute(
    %W[git config --local --get #{verify_signature_config_key}]
  )

  if result.status == 1 # Key doesn't exist
    return true
  elsif result.status != 0
    raise Overcommit::Exceptions::GitConfigError,
          "Unable to read from local repo git config: #{result.stderr}"
  end

  # We don't cast since we want to allow anything to count as "true" except
  # a literal zero
  result.stdout.strip != '0'
end