sds/overcommit · error · RuntimeError

Unable to access git tree

Error message

Unable to access git tree

What it means

Error "Unable to access git tree" thrown in sds/overcommit.

Source

Thrown at lib/overcommit/hook/pre_commit/execute_permissions.rb:48

      extract_from_git_index(file_modes)

      file_modes.map do |file, mode|
        next unless execute_permissions?(mode)

        Overcommit::Hook::Message.new(
          :error,
          file,
          nil,
          "File #{file} has unnecessary execute permissions",
        )
      end.compact
    end

    private

    def extract_from_git_tree(file_modes)
      result = execute(%w[git ls-tree HEAD --], args: applicable_files)
      raise 'Unable to access git tree' unless result.success?

      result.stdout.split("\n").each do |line|
        mode, _type, _hash, file = line.split(/\s+/, 4)
        file_modes[file] = mode
      end
    end

    def extract_from_git_index(file_modes)
      result = execute(%w[git diff --raw --cached --no-color --], args: applicable_files)
      raise 'Unable to access git index' unless result.success?

      result.stdout.split("\n").each do |line|
        _old_mode, new_mode, _old_hash, _new_hash, _status, file = line.split(/\s+/, 6)
        file_modes[file] = new_mode
      end
    end

    # Check if the 1st bit is toggled, indicating execute permissions.

View on GitHub (pinned to fee0cd74b2)

Solutions

1. Ensure the hook runs inside a valid git repository with a readable HEAD tree; run `git ls-tree HEAD` to verify.
2. If HEAD does not exist yet (no commits), make an initial commit or disable the ExecutePermissions hook until one exists.

When it happens

Trigger: Thrown at lib/overcommit/hook/pre_commit/execute_permissions.rb:48 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of sds/overcommit@fee0cd74b2 (2026-08-23). Data as JSON: /api/errors/7eef798c30a203ea. Report an issue: GitHub.