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(* virt-builder
* Copyright (C) 2015 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*)
open Std_utils
open Tools_utils
open Common_gettext.Gettext
open JSON_parser
open Utils
open Printf
let ensure_trailing_slash str =
if String.length str > 0 && str.[String.length str - 1] <> '/' then str ^ "/"
else str
let get_index ~downloader ~sigchecker { Sources.uri; proxy } =
let uri = ensure_trailing_slash uri in
let download_and_parse uri =
let tmpfile, _ = Downloader.download downloader ~proxy uri in
let file =
if Sigchecker.verifying_signatures sigchecker then (
let tmpunsigned =
Sigchecker.verify_and_remove_signature sigchecker tmpfile in
match tmpunsigned with
| None -> assert false (* only when not verifying signatures *)
| Some f -> f
) else
tmpfile in
json_parser_tree_parse_file file in
let downloads =
let uri_index =
if Sigchecker.verifying_signatures sigchecker then
uri ^ "streams/v1/index.sjson"
else
uri ^ "streams/v1/index.json" in
let tree = download_and_parse uri_index in
let format = object_get_string "format" tree in
if format <> "index:1.0" then
error (f_"%s is not a Simple Streams (index) v1.0 JSON file (format: %s)")
uri format;
let index = object_get_object "index" tree in
List.filter_map (
fun (_, desc) ->
let format = object_get_string "format" desc in
let datatype = object_get_string "datatype" desc in
match format, datatype with
| "products:1.0", "image-downloads" ->
Some (object_get_string "path" desc)
| _ -> None
) index in
let scan_product_list path =
let tree = download_and_parse (uri ^ path) in
let format = object_get_string "format" tree in
if format <> "products:1.0" then
error (f_"%s is not a Simple Streams (products) \
v1.0 JSON file (format: %s)")
uri format;
let products = object_get_object "products" tree in
List.filter_map (
fun (prod, prod_desc) ->
let arch = Index.Arch (object_get_string "arch" prod_desc) in
let prods = object_get_object "versions" prod_desc in
let prods = List.filter_map (
fun (rel, rel_desc) ->
let pubname = objects_get_string "pubname" [rel_desc; prod_desc] in
let items = object_find_object "items" rel_desc in
let disk_items = object_find_objects (
function
| (("disk.img"|"disk1.img"), v) -> Some v
| _ -> None
) items in
(match disk_items with
| [] -> None
| disk_item :: _ ->
let printable_name = Some pubname in
let file_uri = uri ^ (object_get_string "path" disk_item) in
let checksums =
let checksums = object_find_objects (
function
(* Since this catches all the keys, and not just
* the ones related to checksums, explicitly filter
* the supported checksums.
*)
| ("sha256"|"sha512" as t, JSON.String c) ->
Some (Checksums.of_string t c)
| _ -> None
) disk_item in
match checksums with
| [] -> None
| x -> Some x in
let revision = Rev_string rel in
let size = object_get_number "size" disk_item in
let aliases = Some [pubname;] in
let entry = { Index.printable_name = printable_name;
osinfo = None;
file_uri = file_uri;
arch = arch;
signature_uri = None;
checksums = checksums;
revision = revision;
format = None;
size = size;
compressed_size = None;
expand = None;
lvexpand = None;
notes = [];
hidden = false;
aliases = aliases;
sigchecker = sigchecker;
proxy = proxy; } in
Some (rel, (prod, entry))
)
) prods in
(* Select the disk image with the bigger version (i.e. usually
* the most recent one. *)
let reverse_revision_compare (rev1, _) (rev2, _) = compare rev2 rev1 in
let prods = List.sort reverse_revision_compare prods in
match prods with
| [] -> None
| (_, entry) :: _ -> Some entry
) products in
let entries = List.flatten (List.map scan_product_list downloads) in
if verbose () then (
printf "simplestreams tree (%s) after parsing:\n" uri;
List.iter (Index.print_entry Stdlib.stdout) entries
);
entries
|
