Re: [Libguestfs] [PATCH v3 01/13] v2v: factor out opening input VM

Opening the source VM and amending the properties in its internal representation in accordance with command-line options fit nicely into two isolated functions. Signed-off-by: Roman Kagan <rkagan(a)virtuozzo.com&gt; --- v2v/v2v.ml | 124 ++++++++++++++++++++++++++++++++----------------------------- 1 file changed, 65 insertions(+), 59 deletions(-) diff --git a/v2v/v2v.ml b/v2v/v2v.ml index fe16131..564c5da 100644 --- a/v2v/v2v.ml +++ b/v2v/v2v.ml @@ -55,65 +55,8 @@ let rec main () = printf "%s: %s %s (%s)\n%!" prog Config.package_name Config.package_version Config.host_cpu; - message (f_"Opening the source %s") input#as_options; - let source = input#source () in - - (* Print source and stop. *) - if print_source then ( - printf (f_"Source guest information (--print-source option):\n"); - printf "\n"; - printf "%s\n" (string_of_source source); - exit 0 - ); - - if verbose () then printf "%s%!" (string_of_source source); - - (match source.s_hypervisor with - | OtherHV hv -> - warning (f_"unknown source hypervisor ('%s') in metadata") hv - | _ -> () - ); - - assert (source.s_name <> ""); - assert (source.s_memory > 0L); - assert (source.s_vcpu >= 1); - if source.s_disks = [] then - error (f_"source has no hard disks!"); - List.iter ( - fun disk -> - assert (disk.s_qemu_uri <> ""); - ) source.s_disks; - - (* Map source name. *) - let source = - match output_name with - | None -> source - (* Note the s_orig_name field retains the original name in case we - * need it for some reason. - *) - | Some name -> { source with s_name = name } in - - (* Map networks and bridges. *) - let source = - let { s_nics = nics } = source in - let nics = List.map ( - fun ({ s_vnet_type = t; s_vnet = vnet } as nic) -> - try - (* Look for a --network or --bridge parameter which names this - * network/bridge (eg. --network in:out). - *) - let new_name = List.assoc (t, vnet) network_map in - { nic with s_vnet = new_name } - with Not_found -> - try - (* Not found, so look for a default mapping (eg. --network out). *) - let new_name = List.assoc (t, "") network_map in - { nic with s_vnet = new_name } - with Not_found -> - (* Not found, so return the original NIC unchanged. *) - nic - ) nics in - { source with s_nics = nics } in + let source = open_source input print_source in + let source = amend_source source output_name network_map in (* Create a qcow2 v3 overlay to protect the source image(s). There * is a specific reason to use the newer qcow2 variant: Because the @@ -454,6 +397,69 @@ let rec main () = message (f_"Finishing off"); delete_target_on_exit := false (* Don't delete target on exit. *) +and open_source input print_source = + message (f_"Opening the source %s") input#as_options; + let source = input#source () in + + (* Print source and stop. *) + if print_source then ( + printf (f_"Source guest information (--print-source option):\n"); + printf "\n"; + printf "%s\n" (string_of_source source); + exit 0 + ); + + if verbose () then printf "%s%!" (string_of_source source); + + (match source.s_hypervisor with + | OtherHV hv -> + warning (f_"unknown source hypervisor ('%s') in metadata") hv + | _ -> () + ); + + assert (source.s_name <> ""); + assert (source.s_memory > 0L); + assert (source.s_vcpu >= 1); + if source.s_disks = [] then + error (f_"source has no hard disks!"); + List.iter ( + fun disk -> + assert (disk.s_qemu_uri <> ""); + ) source.s_disks; + + source + +and amend_source source output_name network_map = + (* Map source name. *) + let source = + match output_name with + | None -> source + (* Note the s_orig_name field retains the original name in case we + * need it for some reason. + *) + | Some name -> { source with s_name = name } in + + (* Map networks and bridges. *) + let nics = List.map ( + fun ({ s_vnet_type = t; s_vnet = vnet } as nic) -> + try + (* Look for a --network or --bridge parameter which names this + * network/bridge (eg. --network in:out). + *) + let new_name = List.assoc (t, vnet) network_map in + { nic with s_vnet = new_name } + with Not_found -> + try + (* Not found, so look for a default mapping (eg. --network out). *) + let new_name = List.assoc (t, "") network_map in + { nic with s_vnet = new_name } + with Not_found -> + (* Not found, so return the original NIC unchanged. *) + nic + ) source.s_nics in + + { source with s_nics = nics } + and inspect_source g root_choice = let roots = g#inspect_os () in let roots = Array.to_list roots in