Class: MetaCommit::Changelog::Commands::CommitDiffExaminer

Inherits:
Object
  • Object
show all
Defined in:
lib/meta_commit/changelog/commands/commit_diff_examiner.rb

Instance Method Summary collapse

Constructor Details

#initialize(parse_command, ast_path_factory, diff_factory) ⇒ CommitDiffExaminer

Returns a new instance of CommitDiffExaminer.

Parameters:



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# File 'lib/meta_commit/changelog/commands/commit_diff_examiner.rb', line 7

def initialize(parse_command, ast_path_factory, diff_factory)
  @parse_command = parse_command
  @ast_path_factory = ast_path_factory
  @diff_factory = diff_factory
end

Instance Method Details

#meta(repo, left_commit, right_commit) ⇒ Array<MetaCommit::Contracts::Diff>

Creates diff objects with meta information of changes between left and right commit

Parameters:

Returns:

  • (Array<MetaCommit::Contracts::Diff>) 


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# File 'lib/meta_commit/changelog/commands/commit_diff_examiner.rb', line 19

def meta(repo, left_commit, right_commit)
  diffs = []
  commit_id_old = left_commit.oid
  commit_id_new = right_commit.oid
  repo.diff_with_optimized_lines(left_commit, right_commit) do |old_file_path, new_file_path, patch, line|
    old_file_content = repo.get_blob_at(commit_id_old, old_file_path, '')
    new_file_content = repo.get_blob_at(commit_id_new, new_file_path, '')

    old_file_ast = @parse_command.execute(old_file_path, old_file_content)
    next if old_file_ast.nil?
    new_file_ast = @parse_command.execute(new_file_path, new_file_content)
    next if new_file_ast.nil?

    column_where_changes_start = line.compute_column(old_file_content, new_file_content)

    old_file_deleted = (patch.delta.new_file[:oid] == MetaCommit::Git::Repo::FILE_NOT_EXISTS_OID)
    old_line_number = (old_file_deleted) ? (MetaCommit::Factories::ContextualAstNodeFactory::WHOLE_FILE) : (line.old_lineno)
    old_contextual_ast = @ast_path_factory.create_contextual_node(old_file_ast, old_line_number)

    new_file_created = (patch.delta.old_file[:oid] == MetaCommit::Git::Repo::FILE_NOT_EXISTS_OID)
    new_line_number = (new_file_created) ? (MetaCommit::Factories::ContextualAstNodeFactory::WHOLE_FILE) : (line.new_lineno)
    new_contextual_ast = @ast_path_factory.create_contextual_node(new_file_ast, new_line_number)

    created_diff = @diff_factory.create_diff({
        :line => line,
        :column => column_where_changes_start,
        :commit_id_old => commit_id_old,
        :commit_id_new => commit_id_new,
        :old_contextual_ast => old_contextual_ast,
        :new_contextual_ast => new_contextual_ast,
        :old_file_path => old_file_path,
        :new_file_path => new_file_path,
    })
    diffs.push(created_diff) unless created_diff.nil?
  end
  diffs
end