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|
-module(rebar_packages).
-export([packages/1
,close_packages/0
,load_and_verify_version/1
,deps/3
,registry_dir/1
,package_dir/1
,registry_checksum/2
,find_highest_matching/4
,verify_table/1
,format_error/1]).
-export_type([package/0]).
-include("rebar.hrl").
-include_lib("providers/include/providers.hrl").
-type pkg_name() :: binary() | atom().
-type vsn() :: binary().
-type package() :: pkg_name() | {pkg_name(), vsn()}.
-spec packages(rebar_state:t()) -> ets:tid().
packages(State) ->
catch ets:delete(?PACKAGE_TABLE),
case load_and_verify_version(State) of
true ->
ok;
false ->
?DEBUG("Error loading package index.", []),
handle_bad_index(State)
end.
handle_bad_index(State) ->
?ERROR("Bad packages index. Trying to fix by updating the registry.", []),
{ok, State1} = rebar_prv_update:do(State),
case load_and_verify_version(State1) of
true ->
ok;
false ->
%% Still unable to load after an update, create an empty registry
ets:new(?PACKAGE_TABLE, [named_table, public])
end.
close_packages() ->
catch ets:delete(?PACKAGE_TABLE).
load_and_verify_version(State) ->
{ok, RegistryDir} = registry_dir(State),
case ets:file2tab(filename:join(RegistryDir, ?INDEX_FILE)) of
{ok, _} ->
case ets:lookup_element(?PACKAGE_TABLE, package_index_version, 2) of
?PACKAGE_INDEX_VERSION ->
true;
_ ->
(catch ets:delete(?PACKAGE_TABLE)),
rebar_prv_update:hex_to_index(State)
end;
_ ->
rebar_prv_update:hex_to_index(State)
end.
deps(Name, Vsn, State) ->
try
deps_(Name, Vsn, State)
catch
_:_ ->
handle_missing_package(Name, Vsn, State)
end.
deps_(Name, Vsn, State) ->
?MODULE:verify_table(State),
ets:lookup_element(?PACKAGE_TABLE, {ec_cnv:to_binary(Name), ec_cnv:to_binary(Vsn)}, 2).
handle_missing_package(Name, Vsn, State) ->
?INFO("Package ~s-~s not found. Fetching registry updates and trying again...", [Name, Vsn]),
{ok, State1} = rebar_prv_update:do(State),
try
deps_(Name, Vsn, State1)
catch
_:_ ->
%% Even after an update the package is still missing, time to error out
throw(?PRV_ERROR({missing_package, ec_cnv:to_binary(Name), ec_cnv:to_binary(Vsn)}))
end.
registry_dir(State) ->
CacheDir = rebar_dir:global_cache_dir(rebar_state:opts(State)),
case rebar_state:get(State, rebar_packages_cdn, ?DEFAULT_CDN) of
?DEFAULT_CDN ->
RegistryDir = filename:join([CacheDir, "hex", "default"]),
ok = filelib:ensure_dir(filename:join(RegistryDir, "placeholder")),
{ok, RegistryDir};
CDN ->
case rebar_utils:url_append_path(CDN, ?REMOTE_PACKAGE_DIR) of
{ok, Parsed} ->
{ok, {_, _, Host, _, Path, _}} = http_uri:parse(Parsed),
CDNHostPath = lists:reverse(string:tokens(Host, ".")),
CDNPath = tl(filename:split(Path)),
RegistryDir = filename:join([CacheDir, "hex"] ++ CDNHostPath ++ CDNPath),
ok = filelib:ensure_dir(filename:join(RegistryDir, "placeholder")),
{ok, RegistryDir};
_ ->
{uri_parse_error, CDN}
end
end.
package_dir(State) ->
case registry_dir(State) of
{ok, RegistryDir} ->
PackageDir = filename:join([RegistryDir, "packages"]),
ok = filelib:ensure_dir(filename:join(PackageDir, "placeholder")),
{ok, PackageDir};
Error ->
Error
end.
registry_checksum({pkg, Name, Vsn}, State) ->
try
?MODULE:verify_table(State),
ets:lookup_element(?PACKAGE_TABLE, {Name, Vsn}, 3)
catch
_:_ ->
throw(?PRV_ERROR({missing_package, ec_cnv:to_binary(Name), ec_cnv:to_binary(Vsn)}))
end.
%% Hex supports use of ~> to specify the version required for a dependency.
%% Since rebar3 requires exact versions to choose from we find the highest
%% available version of the dep that passes the constraint.
%% `~>` will never include pre-release versions of its upper bound.
%% It can also be used to set an upper bound on only the major
%% version part. See the table below for `~>` requirements and
%% their corresponding translation.
%% `~>` | Translation
%% :------------- | :---------------------
%% `~> 2.0.0` | `>= 2.0.0 and < 2.1.0`
%% `~> 2.1.2` | `>= 2.1.2 and < 2.2.0`
%% `~> 2.1.3-dev` | `>= 2.1.3-dev and < 2.2.0`
%% `~> 2.0` | `>= 2.0.0 and < 3.0.0`
%% `~> 2.1` | `>= 2.1.0 and < 3.0.0`
find_highest_matching(Dep, Constraint, Table, State) ->
?MODULE:verify_table(State),
try ets:lookup_element(Table, Dep, 2) of
[[HeadVsn | VsnTail]] ->
{ok, handle_vsns(Constraint, HeadVsn, VsnTail)};
[[Vsn]] ->
handle_single_vsn(Dep, Vsn, Constraint);
[Vsn] ->
handle_single_vsn(Dep, Vsn, Constraint);
[HeadVsn | VsnTail] ->
{ok, handle_vsns(Constraint, HeadVsn, VsnTail)}
catch
error:badarg ->
none
end.
handle_vsns(Constraint, HeadVsn, VsnTail) ->
lists:foldl(fun(Version, Highest) ->
case ec_semver:pes(Version, Constraint) andalso
ec_semver:gt(Version, Highest) of
true ->
Version;
false ->
Highest
end
end, HeadVsn, VsnTail).
handle_single_vsn(Dep, Vsn, Constraint) ->
case ec_semver:pes(Vsn, Constraint) of
true ->
{ok, Vsn};
false ->
?WARN("Only existing version of ~s is ~s which does not match constraint ~~> ~s. "
"Using anyway, but it is not guaranteed to work.", [Dep, Vsn, Constraint]),
{ok, Vsn}
end.
format_error({missing_package, Package, Version}) ->
io_lib:format("Package not found in registry: ~s-~s.", [Package, Version]).
verify_table(State) ->
ets:info(?PACKAGE_TABLE, named_table) =:= true orelse load_and_verify_version(State).
|
