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-rw-r--r--lib/stdlib/src/filelib.erl122
-rw-r--r--lib/stdlib/src/filename.erl74
2 files changed, 138 insertions, 58 deletions
diff --git a/lib/stdlib/src/filelib.erl b/lib/stdlib/src/filelib.erl
index 7029389e2f..daa18da9aa 100644
--- a/lib/stdlib/src/filelib.erl
+++ b/lib/stdlib/src/filelib.erl
@@ -24,6 +24,7 @@
-export([fold_files/5, last_modified/1, file_size/1, ensure_dir/1]).
-export([wildcard/3, is_dir/2, is_file/2, is_regular/2]).
-export([fold_files/6, last_modified/2, file_size/2]).
+-export([find_file/2, find_file/3, find_source/1, find_source/2, find_source/3]).
%% For debugging/testing.
-export([compile_wildcard/1]).
@@ -517,3 +518,124 @@ eval_list_dir(Dir, erl_prim_loader) ->
end;
eval_list_dir(Dir, Mod) ->
Mod:list_dir(Dir).
+
+%% Getting the rules to use for file search
+
+keep_dir_search_rules(Rules) ->
+ [T || {_,_}=T <- Rules].
+
+keep_suffix_search_rules(Rules) ->
+ [T || {_,_,_}=T <- Rules].
+
+get_search_rules() ->
+ case application:get_env(kernel, source_search_rules) of
+ undefined -> default_search_rules();
+ {ok, []} -> default_search_rules();
+ {ok, R} when is_list(R) -> R
+ end.
+
+default_search_rules() ->
+ [%% suffix-speficic rules for source search
+ {".beam", ".erl", erl_source_search_rules()},
+ {".erl", ".yrl", []},
+ {"", ".src", erl_source_search_rules()},
+ {".so", ".c", c_source_search_rules()},
+ {".o", ".c", c_source_search_rules()},
+ {"", ".c", c_source_search_rules()},
+ {"", ".in", basic_source_search_rules()},
+ %% plain old directory rules, backwards compatible
+ {"", ""},
+ {"ebin","src"},
+ {"ebin","esrc"}
+ ].
+
+basic_source_search_rules() ->
+ (erl_source_search_rules()
+ ++ c_source_search_rules()).
+
+erl_source_search_rules() ->
+ [{"ebin","src"}, {"ebin","esrc"}].
+
+c_source_search_rules() ->
+ [{"priv","c_src"}, {"priv","src"}, {"bin","c_src"}, {"bin","src"}, {"", "src"}].
+
+%% Looks for a file relative to a given directory
+
+-type find_file_rule() :: {ObjDirSuffix::string(), SrcDirSuffix::string()}.
+
+-spec find_file(filename(), filename()) ->
+ {ok, filename()} | {error, not_found}.
+find_file(Filename, Dir) ->
+ find_file(Filename, Dir, []).
+
+-spec find_file(filename(), filename(), [find_file_rule()]) ->
+ {ok, filename()} | {error, not_found}.
+find_file(Filename, Dir, []) ->
+ find_file(Filename, Dir, get_search_rules());
+find_file(Filename, Dir, Rules) ->
+ try_dir_rules(keep_dir_search_rules(Rules), Filename, Dir).
+
+%% Looks for a source file relative to the object file name and directory
+
+-type find_source_rule() :: {ObjExtension::string(), SrcExtension::string(),
+ [find_file_rule()]}.
+
+-spec find_source(filename()) ->
+ {ok, filename()} | {error, not_found}.
+find_source(FilePath) ->
+ find_source(filename:basename(FilePath), filename:dirname(FilePath)).
+
+-spec find_source(filename(), filename()) ->
+ {ok, filename()} | {error, not_found}.
+find_source(Filename, Dir) ->
+ find_source(Filename, Dir, []).
+
+-spec find_source(filename(), filename(), [find_source_rule()]) ->
+ {ok, filename()} | {error, not_found}.
+find_source(Filename, Dir, []) ->
+ find_source(Filename, Dir, get_search_rules());
+find_source(Filename, Dir, Rules) ->
+ try_suffix_rules(keep_suffix_search_rules(Rules), Filename, Dir).
+
+try_suffix_rules(Rules, Filename, Dir) ->
+ Ext = filename:extension(Filename),
+ try_suffix_rules(Rules, filename:rootname(Filename, Ext), Dir, Ext).
+
+try_suffix_rules([{Ext,Src,Rules}|Rest], Root, Dir, Ext)
+ when is_list(Src), is_list(Rules) ->
+ case try_dir_rules(add_local_search(Rules), Root ++ Src, Dir) of
+ {ok, File} -> {ok, File};
+ _Other ->
+ try_suffix_rules(Rest, Root, Dir, Ext)
+ end;
+try_suffix_rules([_|Rest], Root, Dir, Ext) ->
+ try_suffix_rules(Rest, Root, Dir, Ext);
+try_suffix_rules([], _Root, _Dir, _Ext) ->
+ {error, not_found}.
+
+%% ensuring we check the directory of the object file before any other directory
+add_local_search(Rules) ->
+ Local = {"",""},
+ [Local] ++ lists:filter(fun (X) -> X =/= Local end, Rules).
+
+try_dir_rules([{From, To}|Rest], Filename, Dir)
+ when is_list(From), is_list(To) ->
+ case try_dir_rule(Dir, Filename, From, To) of
+ {ok, File} -> {ok, File};
+ error -> try_dir_rules(Rest, Filename, Dir)
+ end;
+try_dir_rules([], _Filename, _Dir) ->
+ {error, not_found}.
+
+try_dir_rule(Dir, Filename, From, To) ->
+ case lists:suffix(From, Dir) of
+ true ->
+ NewDir = lists:sublist(Dir, 1, length(Dir)-length(From))++To,
+ Src = filename:join(NewDir, Filename),
+ case is_regular(Src) of
+ true -> {ok, Src};
+ false -> error
+ end;
+ false ->
+ error
+ end.
diff --git a/lib/stdlib/src/filename.erl b/lib/stdlib/src/filename.erl
index 51d5ca711d..0ff22f876a 100644
--- a/lib/stdlib/src/filename.erl
+++ b/lib/stdlib/src/filename.erl
@@ -34,8 +34,8 @@
-export([absname/1, absname/2, absname_join/2,
basename/1, basename/2, dirname/1,
extension/1, join/1, join/2, pathtype/1,
- rootname/1, rootname/2, split/1, nativename/1]).
--export([find_src/1, find_src/2, flatten/1]).
+ rootname/1, rootname/2, split/1, flatten/1, nativename/1]).
+-export([find_src/1, find_src/2]). % deprecated
-export([basedir/2, basedir/3]).
%% Undocumented and unsupported exports.
@@ -750,8 +750,12 @@ separators() ->
_ -> {false, false}
end.
-
-
+%% NOTE: The find_src/1/2 functions are deprecated; they try to do too much
+%% at once and are not a good fit for this module. Parts of the code have
+%% been moved to filelib:find_file/2 instead. Only this part of this
+%% module is allowed to call the filelib module; such mutual dependency
+%% should otherwise be avoided! This code should eventually be removed.
+%%
%% find_src(Module) --
%% find_src(Module, Rules) --
%%
@@ -815,26 +819,27 @@ find_src(ModOrFile, Rules) when is_list(ModOrFile) ->
case code:which(Mod) of
Possibly_Rel_Path when is_list(Possibly_Rel_Path) ->
{ok, Cwd} = file:get_cwd(),
- Dir = dirname(make_abs_path(Cwd, Possibly_Rel_Path)),
- find_src_1(ModOrFile, Dir, Mod, Extension, Rules);
+ ObjPath = make_abs_path(Cwd, Possibly_Rel_Path),
+ find_src_1(ModOrFile, ObjPath, Mod, Extension, Rules);
Ecode when is_atom(Ecode) -> % Ecode :: ecode()
{error, {Ecode, Mod}}
end.
%% At this point, the Mod is known to be valid.
%% If the source name is not known, find it.
-find_src_1(ModOrFile, Dir, Mod, Extension, Rules) ->
+find_src_1(ModOrFile, ObjPath, Mod, Extension, Rules) ->
%% The documentation says this function must return the found path
%% without extension in all cases. Also, ModOrFile could be given with
%% or without extension. Hence the calls to rootname below.
ModOrFileRoot = rootname(ModOrFile, Extension),
- case readable_file(ModOrFileRoot++Extension) of
+ case filelib:is_regular(ModOrFileRoot++Extension) of
true ->
find_src_2(ModOrFileRoot, Mod);
false ->
- case get_source_file(Dir, atom_to_list(Mod)++Extension, Rules) of
- {ok, Src} ->
- find_src_2(rootname(Src, Extension), Mod);
+ SrcName = basename(ObjPath, code:objfile_extension()) ++ Extension,
+ case filelib:find_file(SrcName, dirname(ObjPath), Rules) of
+ {ok, SrcFile} ->
+ find_src_2(rootname(SrcFile, Extension), Mod);
Error ->
Error
end
@@ -879,53 +884,6 @@ filter_options(Base, [_|Rest], Result) ->
filter_options(_Base, [], Result) ->
Result.
-%% Gets the source file given the object directory.
-
-get_source_file(Dir, Filename, []) ->
- Rules =
- case application:get_env(kernel, source_search_rules) of
- undefined -> default_source_search_rules();
- {ok, []} -> default_source_search_rules();
- {ok, R} when is_list(R) -> R
- end,
- get_source_file(Dir, Filename, Rules);
-get_source_file(Dir, Filename, Rules) ->
- source_by_rules(Dir, Filename, Rules).
-
-default_source_search_rules() ->
- [{"", ""}, {"ebin", "src"}, {"ebin", "esrc"}].
-
-source_by_rules(Dir, Filename, [{From, To}|Rest]) ->
- case try_rule(Dir, Filename, From, To) of
- {ok, File} -> {ok, File};
- error -> source_by_rules(Dir, Filename, Rest)
- end;
-source_by_rules(_Dir, _Filename, []) ->
- {error, source_file_not_found}.
-
-try_rule(Dir, Filename, From, To) ->
- case lists:suffix(From, Dir) of
- true ->
- NewDir = lists:sublist(Dir, 1, length(Dir)-length(From))++To,
- Src = join(NewDir, Filename),
- case readable_file(Src) of
- true -> {ok, Src};
- false -> error
- end;
- false ->
- error
- end.
-
-readable_file(File) ->
- case file:read_file_info(File) of
- {ok, #file_info{type=regular, access=read}} ->
- true;
- {ok, #file_info{type=regular, access=read_write}} ->
- true;
- _Other ->
- false
- end.
-
make_abs_path(BasePath, Path) ->
join(BasePath, Path).