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%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
%% ex: ts=4 sw=4 et
-module(rebar_prv_update).
-behaviour(provider).
-export([init/1,
do/1,
format_error/1]).
-export([hex_to_index/1]).
-ifdef(TEST).
-export([cmp_/6, cmpl_/6, valid_vsn/1]).
-endif.
-include("rebar.hrl").
-include_lib("providers/include/providers.hrl").
-define(PROVIDER, update).
-define(DEPS, []).
%% ===================================================================
%% Public API
%% ===================================================================
-spec init(rebar_state:t()) -> {ok, rebar_state:t()}.
init(State) ->
State1 = rebar_state:add_provider(State, providers:create([{name, ?PROVIDER},
{module, ?MODULE},
{bare, true},
{deps, ?DEPS},
{example, "rebar3 update"},
{short_desc, "Update package index."},
{desc, "Update package index."},
{opts, []}])),
{ok, State1}.
-spec do(rebar_state:t()) -> {ok, rebar_state:t()} | {error, string()}.
do(State) ->
try
case rebar_packages:registry_dir(State) of
{ok, RegistryDir} ->
filelib:ensure_dir(filename:join(RegistryDir, "dummy")),
HexFile = filename:join(RegistryDir, "registry"),
?INFO("Updating package registry...", []),
TmpDir = ec_file:insecure_mkdtemp(),
TmpFile = filename:join(TmpDir, "packages.gz"),
CDN = rebar_state:get(State, rebar_packages_cdn, ?DEFAULT_CDN),
case rebar_utils:url_append_path(CDN, ?REMOTE_REGISTRY_FILE) of
{ok, Url} ->
?DEBUG("Fetching registry from ~p", [Url]),
case httpc:request(get, {Url, [{"User-Agent", rebar_utils:user_agent()}]},
[], [{stream, TmpFile}, {sync, true}],
rebar) of
{ok, saved_to_file} ->
{ok, Data} = file:read_file(TmpFile),
Unzipped = zlib:gunzip(Data),
ok = file:write_file(HexFile, Unzipped),
?INFO("Writing registry to ~ts", [HexFile]),
hex_to_index(State),
{ok, State};
_ ->
?PRV_ERROR(package_index_download)
end;
_ ->
?PRV_ERROR({package_parse_cdn, CDN})
end;
{uri_parse_error, CDN} ->
?PRV_ERROR({package_parse_cdn, CDN})
end
catch
_E:C ->
?DEBUG("Error creating package index: ~p ~p", [C, erlang:get_stacktrace()]),
throw(?PRV_ERROR(package_index_write))
end.
-spec format_error(any()) -> iolist().
format_error({package_parse_cdn, Uri}) ->
io_lib:format("Failed to parse CDN url: ~p", [Uri]);
format_error(package_index_download) ->
"Failed to download package index.";
format_error(package_index_write) ->
"Failed to write package index.".
is_supported(<<"make">>) -> true;
is_supported(<<"rebar">>) -> true;
is_supported(<<"rebar3">>) -> true;
is_supported(_) -> false.
hex_to_index(State) ->
{ok, RegistryDir} = rebar_packages:registry_dir(State),
HexFile = filename:join(RegistryDir, "registry"),
try ets:file2tab(HexFile) of
{ok, Registry} ->
try
PackageIndex = filename:join(RegistryDir, "packages.idx"),
?INFO("Generating package index...", []),
(catch ets:delete(?PACKAGE_TABLE)),
ets:new(?PACKAGE_TABLE, [named_table, public]),
ets:foldl(fun({{Pkg, PkgVsn}, [Deps, Checksum, BuildTools | _]}, _) when is_list(BuildTools) ->
case lists:any(fun is_supported/1, BuildTools) of
true ->
DepsList = update_deps_list(Pkg, PkgVsn, Deps, Registry, State),
HashedDeps = update_deps_hashes(DepsList),
ets:insert(?PACKAGE_TABLE, {{Pkg, PkgVsn}, HashedDeps, Checksum});
false ->
true
end;
(_, _) ->
true
end, true, Registry),
ets:foldl(fun({Pkg, [[]]}, _) when is_binary(Pkg) ->
true;
({Pkg, [Vsns=[_Vsn | _Rest]]}, _) when is_binary(Pkg) ->
%% Verify the package is of the right build tool by checking if the first
%% version exists in the table from the foldl above
case [V || V <- Vsns, ets:member(?PACKAGE_TABLE, {Pkg, V})] of
[] ->
true;
Vsns1 ->
ets:insert(?PACKAGE_TABLE, {Pkg, Vsns1})
end;
(_, _) ->
true
end, true, Registry),
ets:insert(?PACKAGE_TABLE, {package_index_version, ?PACKAGE_INDEX_VERSION}),
?INFO("Writing index to ~ts", [PackageIndex]),
ets:tab2file(?PACKAGE_TABLE, PackageIndex),
true
after
catch ets:delete(Registry)
end;
{error, Reason} ->
?DEBUG("Error loading package registry: ~p", [Reason]),
false
catch
_:_ ->
fail
end.
update_deps_list(Pkg, PkgVsn, Deps, HexRegistry, State) ->
lists:foldl(fun([Dep, DepVsn, false, AppName | _], DepsListAcc) ->
Dep1 = {Pkg, PkgVsn, Dep, AppName},
case {valid_vsn(DepVsn), DepVsn} of
%% Those are all not perfectly implemented!
%% and doubled since spaces seem not to be
%% enforced
{false, Vsn} ->
?WARN("[~ts:~ts], Bad dependency version for ~ts: ~ts.",
[Pkg, PkgVsn, Dep, Vsn]),
DepsListAcc;
{_, <<"~>", Vsn/binary>>} ->
highest_matching(Dep1, rm_ws(Vsn), HexRegistry,
State, DepsListAcc);
{_, <<">=", Vsn/binary>>} ->
cmp(Dep1, rm_ws(Vsn), HexRegistry, State,
DepsListAcc, fun ec_semver:gte/2);
{_, <<">", Vsn/binary>>} ->
cmp(Dep1, rm_ws(Vsn), HexRegistry, State,
DepsListAcc, fun ec_semver:gt/2);
{_, <<"<=", Vsn/binary>>} ->
cmpl(Dep1, rm_ws(Vsn), HexRegistry, State,
DepsListAcc, fun ec_semver:lte/2);
{_, <<"<", Vsn/binary>>} ->
cmpl(Dep1, rm_ws(Vsn), HexRegistry, State,
DepsListAcc, fun ec_semver:lt/2);
{_, <<"==", Vsn/binary>>} ->
[{AppName, {pkg, Dep, Vsn, undefined}} | DepsListAcc];
{_, Vsn} ->
[{AppName, {pkg, Dep, Vsn, undefined}} | DepsListAcc]
end;
([_Dep, _DepVsn, true, _AppName | _], DepsListAcc) ->
DepsListAcc
end, [], Deps).
update_deps_hashes(List) ->
[{Name, {pkg, PkgName, Vsn, lookup_hash(PkgName, Vsn, Hash)}}
|| {Name, {pkg, PkgName, Vsn, Hash}} <- List].
lookup_hash(Name, Vsn, undefined) ->
try
ets:lookup_element(?PACKAGE_TABLE, {Name, Vsn}, 3)
catch
_:_ ->
undefined
end;
lookup_hash(_, _, Hash) ->
Hash.
rm_ws(<<" ", R/binary>>) ->
rm_ws(R);
rm_ws(R) ->
R.
valid_vsn(Vsn) ->
%% Regepx from https://github.com/sindresorhus/semver-regex/blob/master/index.js
SemVerRegExp = "v?(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)(\\.(0|[1-9][0-9]*))?"
"(-[0-9a-z-]+(\\.[0-9a-z-]+)*)?(\\+[0-9a-z-]+(\\.[0-9a-z-]+)*)?",
SupportedVersions = "^(>=?|<=?|~>|==)?\\s*" ++ SemVerRegExp ++ "$",
re:run(Vsn, SupportedVersions, [unicode]) =/= nomatch.
highest_matching({Pkg, PkgVsn, Dep, App}, Vsn, HexRegistry, State, DepsListAcc) ->
case rebar_packages:find_highest_matching(Pkg, PkgVsn, Dep, Vsn, HexRegistry, State) of
{ok, HighestDepVsn} ->
[{App, {pkg, Dep, HighestDepVsn, undefined}} | DepsListAcc];
none ->
?WARN("[~ts:~ts] Missing registry entry for package ~ts. Try to fix with `rebar3 update`",
[Pkg, PkgVsn, Dep]),
DepsListAcc
end.
cmp({_Pkg, _PkgVsn, Dep, _App} = Dep1, Vsn, HexRegistry, State, DepsListAcc, CmpFun) ->
{ok, Vsns} = rebar_packages:find_all(Dep, HexRegistry, State),
cmp_(undefined, Vsn, Vsns, DepsListAcc, Dep1, CmpFun).
cmp_(undefined, _MinVsn, [], DepsListAcc, {Pkg, PkgVsn, Dep, _App}, _CmpFun) ->
?WARN("[~ts:~ts] Missing registry entry for package ~ts. Try to fix with `rebar3 update`",
[Pkg, PkgVsn, Dep]),
DepsListAcc;
cmp_(HighestDepVsn, _MinVsn, [], DepsListAcc, {_Pkg, _PkgVsn, Dep, App}, _CmpFun) ->
[{App, {pkg, Dep, HighestDepVsn, undefined}} | DepsListAcc];
cmp_(BestMatch, MinVsn, [Vsn | R], DepsListAcc, Dep, CmpFun) ->
case CmpFun(Vsn, MinVsn) of
true ->
cmp_(Vsn, Vsn, R, DepsListAcc, Dep, CmpFun);
false ->
cmp_(BestMatch, MinVsn, R, DepsListAcc, Dep, CmpFun)
end.
%% We need to treat this differently since we want a version that is LOWER but
%% the higest possible one.
cmpl({_Pkg, _PkgVsn, Dep, _App} = Dep1, Vsn, HexRegistry, State, DepsListAcc, CmpFun) ->
{ok, Vsns} = rebar_packages:find_all(Dep, HexRegistry, State),
cmpl_(undefined, Vsn, Vsns, DepsListAcc, Dep1, CmpFun).
cmpl_(undefined, _MaxVsn, [], DepsListAcc, {Pkg, PkgVsn, Dep, _App}, _CmpFun) ->
?WARN("[~ts:~ts] Missing registry entry for package ~ts. Try to fix with `rebar3 update`",
[Pkg, PkgVsn, Dep]),
DepsListAcc;
cmpl_(HighestDepVsn, _MaxVsn, [], DepsListAcc, {_Pkg, _PkgVsn, Dep, App}, _CmpFun) ->
[{App, {pkg, Dep, HighestDepVsn, undefined}} | DepsListAcc];
cmpl_(undefined, MaxVsn, [Vsn | R], DepsListAcc, Dep, CmpFun) ->
case CmpFun(Vsn, MaxVsn) of
true ->
cmpl_(Vsn, MaxVsn, R, DepsListAcc, Dep, CmpFun);
false ->
cmpl_(undefined, MaxVsn, R, DepsListAcc, Dep, CmpFun)
end;
cmpl_(BestMatch, MaxVsn, [Vsn | R], DepsListAcc, Dep, CmpFun) ->
case CmpFun(Vsn, MaxVsn) of
true ->
case ec_semver:gte(Vsn, BestMatch) of
true ->
cmpl_(Vsn, MaxVsn, R, DepsListAcc, Dep, CmpFun);
false ->
cmpl_(BestMatch, MaxVsn, R, DepsListAcc, Dep, CmpFun)
end;
false ->
cmpl_(BestMatch, MaxVsn, R, DepsListAcc, Dep, CmpFun)
end.
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