Class: ERBLint::Cache

Inherits:
Object
  • Object
show all
Defined in:
lib/erb_lint/cache.rb

Constant Summary collapse

CACHE_DIRECTORY = 
".erb-lint-cache"

Instance Method Summary collapse

Constructor Details

#initialize(config, cache_dir = nil) ⇒ Cache

Returns a new instance of Cache.



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# File 'lib/erb_lint/cache.rb', line 7

def initialize(config, cache_dir = nil)
  @config = config
  @cache_dir = cache_dir || CACHE_DIRECTORY
  @hits = []
  @new_results = []
  puts "Cache mode is on"
end

Instance Method Details

#cache_dir_exists? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/erb_lint/cache.rb', line 59

def cache_dir_exists?
  File.directory?(@cache_dir)
end

#clear ⇒ Object 



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# File 'lib/erb_lint/cache.rb', line 63

def clear
  return unless cache_dir_exists?

  puts "Clearing cache by deleting cache directory"
  FileUtils.rm_r(@cache_dir)
end

#close ⇒ Object 



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# File 'lib/erb_lint/cache.rb', line 41

def close
  prune_cache
end

#get(filename, file_content) ⇒ Object 



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# File 'lib/erb_lint/cache.rb', line 15

def get(filename, file_content)
  file_checksum = checksum(filename, file_content)
  begin
    cache_file_contents_as_offenses = JSON.parse(
      File.read(File.join(@cache_dir, file_checksum))
    ).map do |offense_hash|
      ERBLint::CachedOffense.new(offense_hash)
    end
  rescue Errno::ENOENT
    return false
  end
  @hits.push(file_checksum)
  cache_file_contents_as_offenses
end

#prune_cache ⇒ Object 



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# File 'lib/erb_lint/cache.rb', line 45

def prune_cache
  if hits.empty?
    puts "Cache being created for the first time, skipping prune"
    return
  end

  cache_files = Dir.new(@cache_dir).children
  cache_files.each do |cache_file|
    next if hits.include?(cache_file) || new_results.include?(cache_file)

    File.delete(File.join(@cache_dir, cache_file))
  end
end

#set(filename, file_content, offenses_as_json) ⇒ Object 



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# File 'lib/erb_lint/cache.rb', line 30

def set(filename, file_content, offenses_as_json)
  file_checksum = checksum(filename, file_content)
  @new_results.push(file_checksum)

  FileUtils.mkdir_p(@cache_dir)

  File.open(File.join(@cache_dir, file_checksum), "wb") do |f|
    f.write(offenses_as_json)
  end
end