Contents

# frozen_string_literal: true

require "English"

module Gistory
  class GitRepo
    def initialize(path:)
      raise(Gistory::Error, "This is not a valid git repository") unless Dir.exist?(File.join(path, ".git"))
      raise(Gistory::Error, "git is not available, please install it") unless git_cli_available?
    end

    def changes_to_file(filename)
      max_count = Gistory.config.max_fetched_commits
      strategy = git_log_strategy(filename)
      hashes_and_dates = git("log --pretty=format:'%h|%cD' --max-count=#{max_count} #{strategy}")
      to_commits(hashes_and_dates.split("\n"))
    end

    def file_content_at_commit(commit_hash, filename)
      git("show #{commit_hash}:#{filename}")
    end

    private

    def git_log_strategy(filename)
      if Gistory.config.all_branches?
        "--follow #{filename}"
      else
        # TODO: filter out commits that did not introduce changes to the lock file
        "--first-parent"
      end
    end

    def git_cli_available?
      system("which git > /dev/null 2>&1")
    end

    def to_commits(hashes_and_dates)
      hashes_and_dates.map do |hash_and_date|
        commit_hash, date = hash_and_date.split("|")
        Commit.new(short_hash: commit_hash, date: date)
      end
    end

    def git(command)
      out = `git #{command}`
      raise "Git CLI command failed" unless $CHILD_STATUS.success?
      out
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
gistory-0.2.1	lib/gistory/git_repo.rb