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Sanitize erlcinfo checking

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As erlcinfo is only an internal optimization mechanism, user
should be only minimally bothered by issues with it.  Especially
it shouldn't ever cause a fatal error and if it cannot be restored
properly, only a warning (not error) message should be emitted (if
any).  Also it probably doesn't make sense for this warning message
to be too detailed - just state that something went wrong and
silently delete the erlcinfo file.
This commit is contained in:
David Kubecka 2015-03-23 03:10:28 +01:00
parent ccdfc1a270
commit df97a49ce7
1 changed files with 19 additions and 35 deletions
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54
src/rebar_erlc_compiler.erl
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@ -398,20 +398,17 @@ needs_compile(Source, Target, Parents) ->
lists:any(fun(I) -> TargetLastMod < filelib:last_modified(I) end, lists:any(fun(I) -> TargetLastMod < filelib:last_modified(I) end,
[Source] ++ Parents). [Source] ++ Parents).
check_erlcinfo(#erlcinfo{vsn=?ERLCINFO_VSN}) ->
ok;
check_erlcinfo(#erlcinfo{vsn=Vsn}) ->
?ABORT("~s file version is incompatible. expected: ~b got: ~b~n",
[erlcinfo_file(), ?ERLCINFO_VSN, Vsn]);
check_erlcinfo(_) ->
?ABORT("~s file is invalid. Please delete before next run.~n",
[erlcinfo_file()]).
erlcinfo_file() -> erlcinfo_file() ->
filename:join([rebar_utils:get_cwd(), ".rebar", ?ERLCINFO_FILE]). filename:join([rebar_utils:get_cwd(), ".rebar", ?ERLCINFO_FILE]).
init_erlcinfo(InclDirs, Erls) -> init_erlcinfo(InclDirs, Erls) ->
G = restore_erlcinfo(), G = digraph:new(),
try restore_erlcinfo(G)
catch
_ ->
?WARN("Failed to restore ~s file. Discarding it.~n", [erlcinfo_file()]),
ok = file:delete(erlcinfo_file())
end,
%% Get a unique list of dirs based on the source files' locations. %% Get a unique list of dirs based on the source files' locations.
%% This is used for finding files in sub dirs of the configured %% This is used for finding files in sub dirs of the configured
%% src_dirs. For example, src/sub_dir/foo.erl. %% src_dirs. For example, src/sub_dir/foo.erl.
@ -460,34 +457,21 @@ modify_erlcinfo(G, Source, Dirs) ->
digraph:add_edge(G, Source, Incl) digraph:add_edge(G, Source, Incl)
end, AbsIncls). end, AbsIncls).
restore_erlcinfo() -> restore_erlcinfo(G) ->
G = digraph:new(),
case file:read_file(erlcinfo_file()) of case file:read_file(erlcinfo_file()) of
{ok, Data} -> {ok, Data} ->
try binary_to_term(Data) of #erlcinfo{vsn=?ERLCINFO_VSN, info={Vs, Es}} = binary_to_term(Data),
Erlcinfo -> lists:foreach(
ok = check_erlcinfo(Erlcinfo), fun({V, LastUpdated}) ->
#erlcinfo{info=ErlcInfo} = Erlcinfo, digraph:add_vertex(G, V, LastUpdated)
{Vs, Es} = ErlcInfo, end, Vs),
lists:foreach( lists:foreach(
fun({V, LastUpdated}) -> fun({V1, V2}) ->
digraph:add_vertex(G, V, LastUpdated) digraph:add_edge(G, V1, V2)
end, Vs), end, Es);
lists:foreach( {error, _} ->
fun({V1, V2}) ->
digraph:add_edge(G, V1, V2)
end, Es)
catch
error:badarg ->
?ERROR(
"Failed (binary_to_term) to restore rebar info file."
" Discard file.~n", []),
ok
end;
_Err ->
ok ok
end, end.
G.
store_erlcinfo(_G, _Modified = false) -> store_erlcinfo(_G, _Modified = false) ->
ok; ok;