diff options
| -rw-r--r-- | src/rebar_base_compiler.erl | 13 | ||||
| -rw-r--r-- | src/rebar_erlc_compiler.erl | 435 |
2 files changed, 162 insertions, 286 deletions
diff --git a/src/rebar_base_compiler.erl b/src/rebar_base_compiler.erl index 265ea80..df950d7 100644 --- a/src/rebar_base_compiler.erl +++ b/src/rebar_base_compiler.erl @@ -102,21 +102,10 @@ remove_common_path1([Part | RestFilename], [Part | RestPath]) -> remove_common_path1(FilenameParts, _) -> filename:join(FilenameParts). - -compile(Source, Config, CompileFn) -> - case CompileFn(Source, Config) of - ok -> - ok; - skipped -> - skipped; - Error -> - Error - end. - compile_each([], _Config, _CompileFn) -> ok; compile_each([Source | Rest], Config, CompileFn) -> - case compile(Source, Config, CompileFn) of + case CompileFn(Source, Config) of ok -> ?DEBUG("~sCompiled ~s", [rebar_utils:indent(1), filename:basename(Source)]); {ok, Warnings} -> diff --git a/src/rebar_erlc_compiler.erl b/src/rebar_erlc_compiler.erl index 0ea09dc..f877a6d 100644 --- a/src/rebar_erlc_compiler.erl +++ b/src/rebar_erlc_compiler.erl @@ -33,15 +33,15 @@ -include("rebar.hrl"). -include_lib("stdlib/include/erl_compile.hrl"). --define(ERLCINFO_VSN, 1). +-define(ERLCINFO_VSN, 2). -define(ERLCINFO_FILE, "erlcinfo"). -type erlc_info_v() :: {digraph:vertex(), term()} | 'false'. -type erlc_info_e() :: {digraph:vertex(), digraph:vertex()}. --type erlc_info() :: {list(erlc_info_v()), list(erlc_info_e())}. +-type erlc_info() :: {list(erlc_info_v()), list(erlc_info_e()), list(string())}. -record(erlcinfo, { vsn = ?ERLCINFO_VSN :: pos_integer(), - info = {[], []} :: erlc_info() + info = {[], [], []} :: erlc_info() }). -define(RE_PREFIX, "^[^._]"). @@ -104,7 +104,7 @@ compile(Config, Dir, OutDir) -> doterl_compile(Config, Dir, OutDir). -spec clean(rebar_state:t(), file:filename()) -> 'ok'. -clean(Config, AppDir) -> +clean(_Config, AppDir) -> MibFiles = rebar_utils:find_files(filename:join(AppDir, "mibs"), ?RE_PREFIX".*\\.mib\$"), MIBs = [filename:rootname(filename:basename(MIB)) || MIB <- MibFiles], rebar_file_utils:delete_each( @@ -118,7 +118,7 @@ clean(Config, AppDir) -> || F <- YrlFiles ]), %% Delete the build graph, if any - rebar_file_utils:rm_rf(erlcinfo_file(Config)), + rebar_file_utils:rm_rf(erlcinfo_file()), %% Erlang compilation is recursive, so it's possible that we have a nested %% directory structure in ebin with .beam files within. As such, we want @@ -139,7 +139,6 @@ doterl_compile(State, Dir, ODir) -> doterl_compile(State, Dir, ODir, [], ErlOpts). doterl_compile(Config, Dir, OutDir, MoreSources, ErlOpts) -> - ErlFirstFilesConf = rebar_state:get(Config, erl_first_files, []), ?DEBUG("erl_opts ~p", [ErlOpts]), %% Support the src_dirs option allowing multiple directories to %% contain erlang source. This might be used, for example, should @@ -147,164 +146,84 @@ doterl_compile(Config, Dir, OutDir, MoreSources, ErlOpts) -> SrcDirs = [filename:join(Dir, X) || X <- proplists:get_value(src_dirs, ErlOpts, ["src"])], AllErlFiles = gather_src(SrcDirs, []) ++ MoreSources, - %% Issue: rebar/rebar3#140 (fix matching based on same path + order of - %% erl_first_files) - ErlFirstFiles = get_erl_first_files(ErlFirstFilesConf, AllErlFiles), - RestErls = [ File || File <- AllErlFiles, - not lists:member(File, ErlFirstFiles) ], - %% Make sure that ebin/ exists and is on the path ok = filelib:ensure_dir(filename:join(OutDir, "dummy.beam")), CurrPath = code:get_path(), true = code:add_path(filename:absname(OutDir)), OutDir1 = proplists:get_value(outdir, ErlOpts, OutDir), - G = init_erlcinfo(Config, AllErlFiles), - %% Split RestErls so that files which are depended on are treated - %% like erl_first_files. - {OtherFirstErls, OtherErls} = - lists:partition( - fun(F) -> - Children = get_children(G, F), - log_files(?FMT("Files dependent on ~s", [F]), Children), - - case erls(Children) of - [] -> - %% There are no files dependent on this file. - false; - _ -> - %% There are some files dependent on the file. - %% Thus the file has higher priority - %% and should be compiled in the first place. - true - end - end, RestErls), - %% Dependencies of OtherFirstErls that must be compiled first. - OtherFirstErlsDeps = lists:flatmap( - fun(Erl) -> erls(get_parents(G, Erl)) end, - OtherFirstErls), - %% NOTE: In case the way we retrieve OtherFirstErlsDeps or merge - %% it with OtherFirstErls does not result in the correct compile - %% priorities, or the method in use proves to be too slow for - %% certain projects, consider using a more elaborate method (maybe - %% digraph_utils) or alternatively getting and compiling the .erl - %% parents of an individual Source in internal_erl_compile. By not - %% handling this in internal_erl_compile, we also avoid extra - %% needs_compile/2 calls. - FirstErls = ErlFirstFiles ++ uo_merge(OtherFirstErlsDeps, OtherFirstErls), + + G = init_erlcinfo(proplists:get_all_values(i, ErlOpts), AllErlFiles), + NeededErlFiles = needed_files(G, ErlOpts, Dir, OutDir1, AllErlFiles), + ErlFirstFiles = erl_first_files(Config, NeededErlFiles), + {DepErls, OtherErls} = lists:partition( + fun(Source) -> digraph:in_degree(G, Source) > 0 end, + [File || File <- NeededErlFiles, not lists:member(File, ErlFirstFiles)]), + DepErlsOrdered = digraph_utils:topsort(digraph_utils:subgraph(G, DepErls)), + FirstErls = ErlFirstFiles ++ lists:reverse(DepErlsOrdered), ?DEBUG("Files to compile first: ~p", [FirstErls]), rebar_base_compiler:run( Config, FirstErls, OtherErls, fun(S, C) -> - internal_erl_compile(C, Dir, S, OutDir1, ErlOpts, G) + internal_erl_compile(C, Dir, S, OutDir1, ErlOpts) end), true = code:set_path(CurrPath), ok. -%% -%% Return all .erl files from a list of files -%% -erls(Files) -> - [Erl || Erl <- Files, filename:extension(Erl) =:= ".erl"]. - -%% -%% Return a list of erl_first_files in order as specified in rebar.config -%% using the path from AllFiles. -%% -get_erl_first_files(FirstFiles, AllFiles) -> - BaseFirstFiles = [filename:basename(F) || F <- FirstFiles], - IndexedAllFiles = [{filename:basename(F), F} || F <- AllFiles ], - [ proplists:get_value(FileName, IndexedAllFiles) || - FileName <- BaseFirstFiles, - proplists:is_defined(FileName, IndexedAllFiles) ]. - -%% -%% Return a list without duplicates while preserving order -%% -ulist(L) -> - ulist(L, []). - -ulist([H|T], Acc) -> - case lists:member(H, T) of - true -> - ulist(T, Acc); - false -> - ulist(T, [H|Acc]) - end; -ulist([], Acc) -> - lists:reverse(Acc). - -%% -%% Merge two lists without duplicates while preserving order -%% -uo_merge(L1, L2) -> - lists:foldl(fun(E, Acc) -> u_add_element(E, Acc) end, ulist(L1), L2). - -u_add_element(Elem, [Elem|_]=Set) -> Set; -u_add_element(Elem, [E1|Set]) -> [E1|u_add_element(Elem, Set)]; -u_add_element(Elem, []) -> [Elem]. - --spec include_path(file:filename(), - rebar_state:t()) -> [file:filename(), ...]. -include_path(Source, Config) -> - ErlOpts = rebar_state:get(Config, erl_opts, []), - Dir = filename:join(rebar_utils:droplast(filename:split(filename:dirname(Source)))), - lists:usort([filename:join(Dir, "include"), filename:dirname(Source)] - ++ proplists:get_all_values(i, ErlOpts)). - --spec needs_compile(file:filename(), file:filename(), - list(), [string()]) -> boolean(). -needs_compile(Source, Target, Opts, Parents) -> - TargetLastMod = filelib:last_modified(Target), - F = fun(I) -> source_changed(TargetLastMod, I) end, - lists:any(F, [Source] ++ Parents) orelse opts_changed(Opts, Target). - -source_changed(TargetLastMod, I) -> TargetLastMod < filelib:last_modified(I). - -opts_changed(NewOpts, Target) -> - case compile_info(Target) of - {ok, Opts} -> lists:sort(Opts) =/= lists:sort(NewOpts); - _ -> true - end. - -compile_info(Target) -> - case beam_lib:chunks(Target, [compile_info]) of - {ok, {_mod, Chunks}} -> - CompileInfo = proplists:get_value(compile_info, Chunks, []), - {ok, proplists:get_value(options, CompileInfo, [])}; - {error, beam_lib, Reason} -> - ?WARN("Couldn't read debug info from ~p for reason: ~p", [Target, Reason]), - {error, Reason} +erl_first_files(Config, NeededErlFiles) -> + %% NOTE: rebar_config:get_local perhaps? + ErlFirstFilesConf = rebar_state:get(Config, erl_first_files, []), + %% NOTE: order of files in ErlFirstFiles is important! + [File || File <- ErlFirstFilesConf, lists:member(File, NeededErlFiles)]. + +%% Get subset of SourceFiles which need to be recompiled, respecting +%% dependencies induced by given graph G. +needed_files(G, ErlOpts, Dir, OutDir, SourceFiles) -> + lists:filter(fun(Source) -> + Target = target_base(OutDir, Source) ++ ".beam", + Opts = [{outdir, filename:dirname(Target)} + ,{i, filename:join(Dir, "include")}] ++ ErlOpts, + digraph:vertex(G, Source) > {Source, filelib:last_modified(Target)} + orelse opts_changed(Opts, Target) + end, SourceFiles). + +opts_changed(Opts, Target) -> + Basename = filename:basename(Target, ".beam"), + Dirname = filename:dirname(Target), + ObjectFile = filename:join([Dirname, Basename]), + case code:load_abs(ObjectFile) of + {module, Mod} -> + Compile = Mod:module_info(compile), + lists:sort(Opts) =/= lists:sort(proplists:get_value(options, + Compile, + undefined)); + {error, _} -> true end. -check_erlcinfo(_Config, #erlcinfo{vsn=?ERLCINFO_VSN}) -> - ok; -check_erlcinfo(Config, #erlcinfo{vsn=Vsn}) -> - ?ABORT("~s file version is incompatible. expected: ~b got: ~b", - [erlcinfo_file(Config), ?ERLCINFO_VSN, Vsn]); -check_erlcinfo(Config, _) -> - ?ABORT("~s file is invalid. Please delete before next run.", - [erlcinfo_file(Config)]). - -erlcinfo_file(_Config) -> +erlcinfo_file() -> filename:join(rebar_dir:local_cache_dir(), ?ERLCINFO_FILE). -init_erlcinfo(Config, Erls) -> - G = restore_erlcinfo(Config), - %% Get a unique list of dirs based on the source files' locations. - %% This is used for finding files in sub dirs of the configured - %% src_dirs. For example, src/sub_dir/foo.erl. - Dirs = sets:to_list(lists:foldl( - fun(Erl, Acc) -> - Dir = filename:dirname(Erl), - sets:add_element(Dir, Acc) - end, sets:new(), Erls)), - Updates = [update_erlcinfo(G, Erl, include_path(Erl, Config) ++ Dirs) - || Erl <- Erls], - Modified = lists:member(modified, Updates), - ok = store_erlcinfo(G, Config, Modified), +%% Get dependency graph of given Erls files and their dependencies (header files, +%% parse transforms, behaviours etc.) located in their directories or given +%% InclDirs. Note that last modification times stored in vertices already respect +%% dependencies induced by given graph G. +init_erlcinfo(InclDirs, Erls) -> + G = digraph:new([acyclic]), + try restore_erlcinfo(G, InclDirs) + catch + _:_ -> + ?WARN("Failed to restore ~s file. Discarding it.~n", [erlcinfo_file()]), + file:delete(erlcinfo_file()) + end, + Dirs = source_and_include_dirs(InclDirs, Erls), + Modified = lists:foldl(update_erlcinfo_fun(G, Dirs), false, Erls), + if Modified -> store_erlcinfo(G, InclDirs); not Modified -> ok end, G. -update_erlcinfo(G, Source, Dirs) -> +source_and_include_dirs(InclDirs, Erls) -> + SourceDirs = lists:map(fun filename:dirname/1, Erls), + lists:usort(["include" | InclDirs ++ SourceDirs]). + +update_erlcinfo(G, Dirs, Source) -> case digraph:vertex(G, Source) of {_, LastUpdated} -> case filelib:last_modified(Source) of @@ -315,77 +234,75 @@ update_erlcinfo(G, Source, Dirs) -> digraph:del_vertex(G, Source), modified; LastModified when LastUpdated < LastModified -> - modify_erlcinfo(G, Source, Dirs), - modified; + modify_erlcinfo(G, Source, LastModified, Dirs); _ -> - unmodified + Modified = lists:foldl( + update_erlcinfo_fun(G, Dirs), + false, digraph:out_neighbours(G, Source)), + MaxModified = update_max_modified_deps(G, Source), + case Modified orelse MaxModified > LastUpdated of + true -> modified; + false -> unmodified + end end; false -> - modify_erlcinfo(G, Source, Dirs), - modified + modify_erlcinfo(G, Source, filelib:last_modified(Source), Dirs) + end. + +update_erlcinfo_fun(G, Dirs) -> + fun(Erl, Modified) -> + case update_erlcinfo(G, Dirs, Erl) of + modified -> true; + unmodified -> Modified + end end. -modify_erlcinfo(G, Source, Dirs) -> +update_max_modified_deps(G, Source) -> + MaxModified = lists:max(lists:map( + fun(File) -> {_, MaxModified} = digraph:vertex(G, File), MaxModified end, + [Source|digraph:out_neighbours(G, Source)])), + digraph:add_vertex(G, Source, MaxModified), + MaxModified. + +modify_erlcinfo(G, Source, LastModified, Dirs) -> {ok, Fd} = file:open(Source, [read]), Incls = parse_attrs(Fd, []), AbsIncls = expand_file_names(Incls, Dirs), ok = file:close(Fd), - LastUpdated = {date(), time()}, - digraph:add_vertex(G, Source, LastUpdated), + digraph:add_vertex(G, Source, LastModified), + digraph:del_edges(G, digraph:out_edges(G, Source)), lists:foreach( fun(Incl) -> - update_erlcinfo(G, Incl, Dirs), + update_erlcinfo(G, Dirs, Incl), digraph:add_edge(G, Source, Incl) - end, AbsIncls). + end, AbsIncls), + modified. -restore_erlcinfo(Config) -> - File = erlcinfo_file(Config), - G = digraph:new(), - case file:read_file(File) of +restore_erlcinfo(G, InclDirs) -> + case file:read_file(erlcinfo_file()) of {ok, Data} -> - try binary_to_term(Data) of - Erlcinfo -> - ok = check_erlcinfo(Config, Erlcinfo), - #erlcinfo{info=ErlcInfo} = Erlcinfo, - {Vs, Es} = ErlcInfo, - lists:foreach( - fun({V, LastUpdated}) -> - digraph:add_vertex(G, V, LastUpdated) - end, Vs), - lists:foreach( - 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.", []), - ok - end; - _Err -> + % Since externally passed InclDirs can influence erlcinfo graph (see + % modify_erlcinfo), we have to check here that they didn't change. + #erlcinfo{vsn=?ERLCINFO_VSN, info={Vs, Es, InclDirs}} = + binary_to_term(Data), + lists:foreach( + fun({V, LastUpdated}) -> + digraph:add_vertex(G, V, LastUpdated) + end, Vs), + lists:foreach( + fun({_, V1, V2, _}) -> + digraph:add_edge(G, V1, V2) + end, Es); + {error, _} -> ok - end, - G. + end. -store_erlcinfo(_G, _Config, _Modified = false) -> - ok; -store_erlcinfo(G, Config, _Modified) -> - Vs = lists:map( - fun(V) -> - digraph:vertex(G, V) - end, digraph:vertices(G)), - Es = lists:flatmap( - fun({V, _}) -> - lists:map( - fun(E) -> - {_, V1, V2, _} = digraph:edge(G, E), - {V1, V2} - end, digraph:out_edges(G, V)) - end, Vs), - File = erlcinfo_file(Config), +store_erlcinfo(G, InclDirs) -> + Vs = lists:map(fun(V) -> digraph:vertex(G, V) end, digraph:vertices(G)), + Es = lists:map(fun(E) -> digraph:edge(G, E) end, digraph:edges(G)), + File = erlcinfo_file(), ok = filelib:ensure_dir(File), - Data = term_to_binary(#erlcinfo{info={Vs, Es}}, [{compressed, 9}]), + Data = term_to_binary(#erlcinfo{info={Vs, Es, InclDirs}}, [{compressed, 2}]), file:write_file(File, Data). %% NOTE: If, for example, one of the entries in Files, refers to @@ -420,50 +337,27 @@ expand_file_names(Files, Dirs) -> end end, Files). --spec get_parents(rebar_digraph(), file:filename()) -> [file:filename()]. -get_parents(G, Source) -> - %% Return all files which the Source depends upon. - digraph_utils:reachable_neighbours([Source], G). - --spec get_children(rebar_digraph(), file:filename()) -> [file:filename()]. -get_children(G, Source) -> - %% Return all files dependent on the Source. - digraph_utils:reaching_neighbours([Source], G). - --spec internal_erl_compile(rebar_state:t(), file:filename(), file:filename(), - file:filename(), list(), - rebar_digraph()) -> 'ok' | 'skipped'. -internal_erl_compile(Config, Dir, Source, OutDir, ErlOpts, G) -> - %% Determine the target name and includes list by inspecting the source file - Module = filename:basename(Source, ".erl"), - Parents = get_parents(G, Source), - log_files(?FMT("Dependencies of ~s", [Source]), Parents), - %% Construct the target filename - Target = filename:join([OutDir | string:tokens(Module, ".")]) ++ ".beam", +-spec internal_erl_compile(rebar_config:config(), file:filename(), file:filename(), + file:filename(), list()) -> ok | {ok, any()} | {error, any(), any()}. +internal_erl_compile(Config, Dir, Module, OutDir, ErlOpts) -> + Target = target_base(OutDir, Module) ++ ".beam", ok = filelib:ensure_dir(Target), - - %% Construct the compile opts - Opts = [{outdir, filename:dirname(Target)}] ++ - ErlOpts ++ [{i, filename:join(Dir, "include")}], - - %% If the file needs compilation, based on last mod date of includes or - %% the target - case needs_compile(Source, Target, Opts, Parents) of - true -> - case compile:file(Source, Opts ++ [return]) of - {ok, _Mod} -> - ok; - {ok, _Mod, Ws} -> - rebar_base_compiler:ok_tuple(Config, Source, Ws); - {error, Es, Ws} -> - rebar_base_compiler:error_tuple(Config, Source, - Es, Ws, Opts) - end; - false -> - skipped + Opts = [{outdir, filename:dirname(Target)}] ++ ErlOpts ++ + [{i, filename:join(Dir, "include")}, return], + case compile:file(Module, Opts) of + {ok, _Mod} -> + ok; + {ok, _Mod, Ws} -> + rebar_base_compiler:ok_tuple(Config, Module, Ws); + {error, Es, Ws} -> + rebar_base_compiler:error_tuple(Config, Module, Es, Ws, Opts) end. +target_base(OutDir, Source) -> + Module = filename:basename(Source, ".erl"), + filename:join([OutDir|string:tokens(Module, ".")]). + -spec compile_mib(file:filename(), file:filename(), rebar_state:t()) -> 'ok'. compile_mib(Source, Target, Config) -> @@ -507,7 +401,7 @@ compile_xrl_yrl(Config, Source, Target, Opts, Mod) -> Dir = rebar_state:dir(Config), Opts1 = [{includefile, filename:join(Dir, I)} || {includefile, I} <- Opts, filename:pathtype(I) =:= relative], - case needs_compile(Source, Target, Opts1, []) of + case filelib:last_modified(Source) > filelib:last_modified(Target) of true -> case Mod:file(Source, Opts1 ++ [{return, true}]) of {ok, _} -> @@ -556,21 +450,15 @@ parse_attrs(Fd, Includes) -> end. process_attr(Form, Includes) -> - try - AttrName = erl_syntax:atom_value(erl_syntax:attribute_name(Form)), - process_attr(AttrName, Form, Includes) - catch _:_ -> - %% TODO: We should probably try to be more specific here - %% and not suppress all errors. - Includes - end. + AttrName = erl_syntax:atom_value(erl_syntax:attribute_name(Form)), + process_attr(AttrName, Form, Includes). process_attr(import, Form, Includes) -> case erl_syntax_lib:analyze_import_attribute(Form) of {Mod, _Funs} -> - [atom_to_list(Mod) ++ ".erl"|Includes]; + [module_to_erl(Mod)|Includes]; Mod -> - [atom_to_list(Mod) ++ ".erl"|Includes] + [module_to_erl(Mod)|Includes] end; process_attr(file, Form, Includes) -> {File, _} = erl_syntax_lib:analyze_file_attribute(Form), @@ -582,29 +470,36 @@ process_attr(include, Form, Includes) -> process_attr(include_lib, Form, Includes) -> [FileNode] = erl_syntax:attribute_arguments(Form), RawFile = erl_syntax:string_value(FileNode), - File = maybe_expand_include_lib_path(RawFile), - [File|Includes]; + maybe_expand_include_lib_path(RawFile) ++ Includes; process_attr(behaviour, Form, Includes) -> [FileNode] = erl_syntax:attribute_arguments(Form), - File = erl_syntax:atom_name(FileNode) ++ ".erl", + File = module_to_erl(erl_syntax:atom_value(FileNode)), [File|Includes]; process_attr(compile, Form, Includes) -> [Arg] = erl_syntax:attribute_arguments(Form), case erl_syntax:concrete(Arg) of {parse_transform, Mod} -> - [atom_to_list(Mod) ++ ".erl"|Includes]; + [module_to_erl(Mod)|Includes]; {core_transform, Mod} -> - [atom_to_list(Mod) ++ ".erl"|Includes]; + [module_to_erl(Mod)|Includes]; L when is_list(L) -> lists:foldl( - fun({parse_transform, M}, Acc) -> - [atom_to_list(M) ++ ".erl"|Acc]; - ({core_transform, M}, Acc) -> - [atom_to_list(M) ++ ".erl"|Acc]; + fun({parse_transform, Mod}, Acc) -> + [module_to_erl(Mod)|Acc]; + ({core_transform, Mod}, Acc) -> + [module_to_erl(Mod)|Acc]; (_, Acc) -> Acc - end, Includes, L) - end. + end, Includes, L); + _ -> + Includes + end; +process_attr(_, _Form, Includes) -> + Includes. + +module_to_erl(Mod) -> + atom_to_list(Mod) ++ ".erl". + %% Given the filename from an include_lib attribute, if the path %% exists, return unmodified, or else get the absolute ERL_LIBS @@ -612,7 +507,7 @@ process_attr(compile, Form, Includes) -> maybe_expand_include_lib_path(File) -> case filelib:is_regular(File) of true -> - File; + [File]; false -> expand_include_lib_path(File) end. @@ -627,8 +522,10 @@ expand_include_lib_path(File) -> Split = filename:split(filename:dirname(File)), Lib = hd(Split), SubDir = filename:join(tl(Split)), - Dir = code:lib_dir(list_to_atom(Lib), list_to_atom(SubDir)), - filename:join(Dir, File1). + case code:lib_dir(list_to_atom(Lib), list_to_atom(SubDir)) of + {error, bad_name} -> []; + Dir -> [filename:join(Dir, File1)] + end. %% %% Ensure all files in a list are present and abort if one is missing @@ -642,13 +539,3 @@ check_file(File) -> false -> ?ABORT("File ~p is missing, aborting\n", [File]); true -> File end. - -%% Print prefix followed by list of files. If the list is empty, print -%% on the same line, otherwise use a separate line. -log_files(Prefix, Files) -> - case Files of - [] -> - ?DEBUG("~s: ~p", [Prefix, Files]); - _ -> - ?DEBUG("~s:~n~p", [Prefix, Files]) - end. |