Class: HostSyncManager

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

Overview

This helper module introduces a common routine that synchronizes the “remotes”.

Instance Method Summary collapse

Constructor Details

#initialize(one_config = nil) ⇒ HostSyncManager

Returns a new instance of HostSyncManager.



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# File 'lib/HostSyncManager.rb', line 32

def initialize(one_config = nil)
    one_location = ENV['ONE_LOCATION']&.delete("'")
    if one_location.nil?
        @one_config_path         = '/var/lib/one/config'
        @local_scripts_base_path = '/var/lib/one/remotes'
    else
        @one_config_path         = one_location + '/var/config'
        @local_scripts_base_path = one_location + '/var/remotes'
    end

    # Do a simple parsing of the config file unless the values
    # are already provided. NOTE: We don't care about "arrays" here..
    one_config ||= File.read(@one_config_path).lines.each_with_object({}) \
    do |line, object|
        key, value = line.split('=').map(&:strip)
        object[key.upcase] = value
    end

    @remote_scripts_base_path = one_config['SCRIPTS_REMOTE_DIR']
    @remote_scripts_base_path&.delete!("'")
end

Instance Method Details

#error?(cmd) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/HostSyncManager.rb', line 103

def error?(cmd)
    return false if cmd.code == 0

    STDERR.puts cmd.stderr
    STDOUT.puts cmd.stdout
    true
end

#update_remotes(hostname, logger = nil, copy_method = :rsync, subset = nil) ⇒ Object 



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# File 'lib/HostSyncManager.rb', line 54

def update_remotes(hostname, logger = nil, copy_method = :rsync, subset = nil)
    sources = '.'

    if subset && copy_method == :rsync
        # Make sure all files in the subset exist (and are relative).
        subset.each do |path|
            File.realpath path, @local_scripts_base_path
        end

        sources = subset.join(' ')
    end

    assemble_cmd = lambda do |steps|
        "exec 2>/dev/null; #{steps.join(' && ')}"
    end

    case copy_method
    when :ssh
        mkdir_cmd = assemble_cmd.call [
            "rm -rf '#{@remote_scripts_base_path}'/",
            "mkdir -p '#{@remote_scripts_base_path}'/"
        ]

        sync_cmd = assemble_cmd.call [
            "cd '#{@local_scripts_base_path}'/",
            "scp -rp #{sources} " \
                "'#{hostname}':'#{@remote_scripts_base_path}'/"
        ]
    when :rsync
        mkdir_cmd = assemble_cmd.call [
            "mkdir -p '#{@remote_scripts_base_path}'/"
        ]

        sync_cmd = assemble_cmd.call [
            "cd '#{@local_scripts_base_path}'/",
            "rsync -LRaz --delete #{sources} " \
                "'#{hostname}':'#{@remote_scripts_base_path}'/"
        ]
    end

    cmd = SSHCommand.run(mkdir_cmd, hostname, logger)
    return cmd.code if error?(cmd)

    cmd = LocalCommand.run(sync_cmd, logger)
    return cmd.code if error?(cmd)

    0
end