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84 lines
3.0 KiB
84 lines
3.0 KiB
%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
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%% ex: ts=4 sw=4 et
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%% -------------------------------------------------------------------
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%%
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%% rebar: Erlang Build Tools
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%%
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%% -------------------------------------------------------------------
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-module(rebar_fetch).
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-export([lock_source/2,
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download_source/2,
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needs_update/2]).
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-include("rebar.hrl").
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%% map short versions of resources to module names
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-define(RESOURCES, [{git, rebar_git_resource}, {pkg, rebar_pkg_resource}]).
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-spec lock_source(file:filename_all(), rebar_resource:resource()) ->
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rebar_resource:resource() | {error, string()}.
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lock_source(AppDir, Source) ->
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Module = get_resource_type(Source),
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Module:lock(AppDir, Source).
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-spec download_source(file:filename_all(), rebar_resource:resource()) -> true | {error, any()}.
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download_source(AppDir, Source) ->
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try
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Module = get_resource_type(Source),
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TmpDir = ec_file:insecure_mkdtemp(),
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AppDir1 = ec_cnv:to_list(AppDir),
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ec_file:mkdir_p(AppDir1),
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case Module:download(TmpDir, Source) of
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{ok, _} ->
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code:del_path(filename:absname(filename:join(AppDir1, "ebin"))),
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ec_file:remove(filename:absname(AppDir1), [recursive]),
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ok = ec_file:copy(TmpDir, filename:absname(AppDir1), [recursive]),
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true;
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{tarball, File} ->
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ok = erl_tar:extract(File, [{cwd, TmpDir}
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,compressed]),
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BaseName = filename:basename(AppDir1),
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[FromDir] = filelib:wildcard(filename:join(TmpDir, BaseName++"-*")),
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code:del_path(filename:absname(filename:join(AppDir1, "ebin"))),
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ec_file:remove(filename:absname(AppDir1), [recursive]),
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ok = ec_file:copy(FromDir, filename:absname(AppDir1), [recursive]),
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true
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end
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catch
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_:E ->
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{error, E}
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end.
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-spec needs_update(file:filename_all(), rebar_resource:resource()) -> boolean() | {error, string()}.
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needs_update(AppDir, Source) ->
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Module = get_resource_type(Source),
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try
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Module:needs_update(AppDir, Source)
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catch
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_:_ ->
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true
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end.
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get_resource_type({Type, Location}) ->
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find_resource_module(Type, Location);
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get_resource_type({Type, Location, _}) ->
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find_resource_module(Type, Location);
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get_resource_type({Type, _, _, Location}) ->
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find_resource_module(Type, Location);
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get_resource_type(_) ->
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rebar_pkg_resource.
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find_resource_module(Type, Location) ->
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case lists:keyfind(Type, 1, ?RESOURCES) of
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false ->
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case code:which(Type) of
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non_existing ->
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{error, io_lib:format("Cannot handle dependency ~s.~n"
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" No module for resource type ~p", [Location, Type])};
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_ ->
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Type
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end;
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{Type, Module} ->
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Module
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end.
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