Module: Snapsync::Btrfs

Defined in:
lib/snapsync/btrfs.rb

Defined Under Namespace

Classes: Error

Class Method Summary collapse

Class Method Details

.popen(*args, mode: 'r', raise_on_error: true, **options) ⇒ Object 



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# File 'lib/snapsync/btrfs.rb', line 20

def self.popen(*args, mode: 'r', raise_on_error: true, **options)
    err_r, err_w = IO.pipe

    block_error, block_result = nil
    IO.popen(['btrfs', *args, err: err_w, **options], mode) do |io|
        err_w.close
        if block_given?
            begin
                block_result = yield(io)
            rescue Error
                raise
            rescue Exception => block_error
            end
        else io.read
        end
    end

    if $?.success? && !block_error
        block_result
    elsif raise_on_error
        if block_error
            raise Error.new, block_error.message
        else
            raise Error.new, "btrfs failed"
        end
    end

rescue Error => e
    prefix = args.join(" ")
    lines = err_r.readlines.map do |line|
        "#{prefix}: #{line.chomp}"
    end
    raise Error.new(e.error_lines + lines), e.message, e.backtrace

ensure err_r.close
end

.run(*args, **options) ⇒ Object 



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# File 'lib/snapsync/btrfs.rb', line 57

def self.run(*args, **options)
    popen(*args, **options) do |io|
        io.read
    end
end