diff options
Diffstat (limited to 'lib/stdlib/src')
| -rw-r--r-- | lib/stdlib/src/c.erl | 254 | ||||
| -rw-r--r-- | lib/stdlib/src/filelib.erl | 122 | ||||
| -rw-r--r-- | lib/stdlib/src/filename.erl | 109 | ||||
| -rw-r--r-- | lib/stdlib/src/otp_internal.erl | 7 | ||||
| -rw-r--r-- | lib/stdlib/src/shell_default.erl | 3 |
5 files changed, 393 insertions, 102 deletions
diff --git a/lib/stdlib/src/c.erl b/lib/stdlib/src/c.erl index d36630214c..d3f9a9c7af 100644 --- a/lib/stdlib/src/c.erl +++ b/lib/stdlib/src/c.erl @@ -23,7 +23,7 @@ %% Avoid warning for local function error/2 clashing with autoimported BIF. -compile({no_auto_import,[error/2]}). --export([help/0,lc/1,c/1,c/2,nc/1,nc/2, nl/1,l/1,i/0,i/1,ni/0, +-export([help/0,lc/1,c/1,c/2,c/3,nc/1,nc/2, nl/1,l/1,i/0,i/1,ni/0, y/1, y/2, lc_batch/0, lc_batch/1, i/3,pid/3,m/0,m/1,mm/0,lm/0, @@ -44,7 +44,7 @@ help() -> io:put_chars(<<"bt(Pid) -- stack backtrace for a process\n" - "c(File) -- compile and load code in <File>\n" + "c(Mod) -- compile and load module or file <Mod>\n" "cd(Dir) -- change working directory\n" "flush() -- flush any messages sent to the shell\n" "help() -- help info\n" @@ -72,32 +72,222 @@ help() -> "xm(M) -- cross reference check a module\n" "y(File) -- generate a Yecc parser\n">>). -%% c(FileName) -%% Compile a file/module. +%% c(Module) +%% Compile a module/file. --spec c(File) -> {'ok', Module} | 'error' when - File :: file:name(), - Module :: module(). +-spec c(Module) -> {'ok', ModuleName} | 'error' when + Module :: file:name(), + ModuleName :: module(). -c(File) -> c(File, []). +c(Module) -> c(Module, []). --spec c(File, Options) -> {'ok', Module} | 'error' when - File :: file:name(), +-spec c(Module, Options) -> {'ok', ModuleName} | 'error' when + Module :: file:name(), Options :: [compile:option()], - Module :: module(). + ModuleName :: module(). + +c(Module, Opts) when is_atom(Module) -> + %% either a module name or a source file name (possibly without + %% suffix); if such a source file exists, it is used to compile from + %% scratch with the given options, otherwise look for an object file + Suffix = case filename:extension(Module) of + "" -> src_suffix(Opts); + S -> S + end, + SrcFile = filename:rootname(Module, Suffix) ++ Suffix, + case filelib:is_file(SrcFile) of + true -> + compile_and_load(SrcFile, Opts); + false -> + c(Module, Opts, fun (_) -> true end) + end; +c(Module, Opts) -> + %% we never interpret a string as a module name, only as a file + compile_and_load(Module, Opts). + +%% This tries to find an existing object file and use its compile_info and +%% source path to recompile the module, overwriting the old object file. +%% The Filter parameter is applied to the old compile options + +-spec c(Module, Options, Filter) -> {'ok', ModuleName} | 'error' when + Module :: atom(), + Options :: [compile:option()], + Filter :: fun ((compile:option()) -> boolean()), + ModuleName :: module(). + +c(Module, Options, Filter) when is_atom(Module) -> + case find_beam(Module) of + BeamFile when is_list(BeamFile) -> + c(Module, Options, Filter, BeamFile); + Error -> + {error, Error} + end. + +c(Module, Options, Filter, BeamFile) -> + case compile_info(Module, BeamFile) of + Info when is_list(Info) -> + case find_source(BeamFile, Info) of + SrcFile when is_list(SrcFile) -> + c(SrcFile, Options, Filter, BeamFile, Info); + Error -> + Error + end; + Error -> + Error + end. + +c(SrcFile, NewOpts, Filter, BeamFile, Info) -> + %% Filter old options; also remove options that will be replaced. + %% Write new beam over old beam unless other outdir is specified. + F = fun (Opt) -> not is_outdir_opt(Opt) andalso Filter(Opt) end, + Options = (NewOpts ++ [{outdir,filename:dirname(BeamFile)}] + ++ lists:filter(F, old_options(Info))), + format("Recompiling ~s\n", [SrcFile]), + safe_recompile(SrcFile, Options, BeamFile). + +old_options(Info) -> + case lists:keyfind(options, 1, Info) of + {options, Opts} -> Opts; + false -> [] + end. + +%% prefer the source path in the compile info if the file exists, +%% otherwise do a standard source search relative to the beam file +find_source(BeamFile, Info) -> + case lists:keyfind(source, 1, Info) of + {source, SrcFile} -> + case filelib:is_file(SrcFile) of + true -> SrcFile; + false -> find_source(BeamFile) + end; + _ -> + find_source(BeamFile) + end. + +find_source(BeamFile) -> + case filelib:find_source(BeamFile) of + {ok, SrcFile} -> SrcFile; + _ -> {error, no_source} + end. -c(File, Opts0) when is_list(Opts0) -> - Opts = [report_errors,report_warnings|Opts0], +%% find the beam file for a module, preferring the path reported by code:which() +%% if it still exists, or otherwise by searching the code path +find_beam(Module) when is_atom(Module) -> + case code:which(Module) of + Beam when is_list(Beam), Beam =/= "" -> + case erlang:module_loaded(Module) of + false -> + Beam; % code:which/1 found this in the path + true -> + case filelib:is_file(Beam) of + true -> Beam; + false -> find_beam_1(Module) % file moved? + end + end; + Other when Other =:= ""; Other =:= cover_compiled -> + %% module is loaded but not compiled directly from source + find_beam_1(Module); + Error -> + Error + end. + +find_beam_1(Module) -> + File = atom_to_list(Module) ++ code:objfile_extension(), + case code:where_is_file(File) of + Beam when is_list(Beam) -> + Beam; + Error -> + Error + end. + +%% get the compile_info for a module +%% -will report the info for the module in memory, if loaded +%% -will try to find and examine the beam file if not in memory +%% -will not cause a module to become loaded by accident +compile_info(Module, Beam) when is_atom(Module) -> + case erlang:module_loaded(Module) of + true -> + %% getting the compile info for a loaded module should normally + %% work, but return an empty info list if it fails + try erlang:get_module_info(Module, compile) + catch _:_ -> [] + end; + false -> + case beam_lib:chunks(Beam, [compile_info]) of + {ok, {_Module, [{compile_info, Info}]}} -> + Info; + Error -> + Error + end + end. + +%% compile module, backing up any existing target file and restoring the +%% old version if compilation fails (this should only be used when we have +%% an old beam file that we want to preserve) +safe_recompile(File, Options, BeamFile) -> + %% Note that it's possible that because of options such as 'to_asm', + %% the compiler might not actually write a new beam file at all + Backup = BeamFile ++ ".bak", + case file:rename(BeamFile, Backup) of + Status when Status =:= ok; Status =:= {error,enoent} -> + case compile_and_load(File, Options) of + {ok, _} = Result -> + _ = if Status =:= ok -> file:delete(Backup); + true -> ok + end, + Result; + Error -> + _ = if Status =:= ok -> file:rename(Backup, BeamFile); + true -> ok + end, + Error + end; + Error -> + Error + end. + +%% Compile the file and load the resulting object code (if any). +%% Automatically ensures that there is an outdir option, by default the +%% directory of File, and that a 'from' option will be passed to match the +%% actual source suffix if needed (unless already specified). +compile_and_load(File, Opts0) when is_list(Opts0) -> + Opts = [report_errors, report_warnings + | ensure_from(filename:extension(File), + ensure_outdir(filename:dirname(File), Opts0))], case compile:file(File, Opts) of {ok,Mod} -> %Listing file. - machine_load(Mod, File, Opts); + purge_and_load(Mod, File, Opts); {ok,Mod,_Ws} -> %Warnings maybe turned on. - machine_load(Mod, File, Opts); + purge_and_load(Mod, File, Opts); Other -> %Errors go here Other end; -c(File, Opt) -> - c(File, [Opt]). +compile_and_load(File, Opt) -> + compile_and_load(File, [Opt]). + +ensure_from(Suffix, Opts0) -> + case lists:partition(fun is_from_opt/1, Opts0++from_opt(Suffix)) of + {[Opt|_], Opts} -> [Opt | Opts]; + {[], Opts} -> Opts + end. + +ensure_outdir(Dir, Opts0) -> + {[Opt|_], Opts} = lists:partition(fun is_outdir_opt/1, + Opts0++[{outdir,Dir}]), + [Opt | Opts]. + +is_outdir_opt({outdir, _}) -> true; +is_outdir_opt(_) -> false. + +is_from_opt(from_core) -> true; +is_from_opt(from_asm) -> true; +is_from_opt(from_beam) -> true; +is_from_opt(_) -> false. + +from_opt(".core") -> [from_core]; +from_opt(".S") -> [from_asm]; +from_opt(".beam") -> [from_beam]; +from_opt(_) -> []. %%% Obtain the 'outdir' option from the argument. Return "." if no %%% such option was given. @@ -113,18 +303,29 @@ outdir([Opt|Rest]) -> outdir(Rest) end. +%% mimic how suffix is selected in compile:file(). +src_suffix([from_core|_]) -> ".core"; +src_suffix([from_asm|_]) -> ".S"; +src_suffix([from_beam|_]) -> ".beam"; +src_suffix([_|Opts]) -> src_suffix(Opts); +src_suffix([]) -> ".erl". + %%% We have compiled File with options Opts. Find out where the -%%% output file went to, and load it. -machine_load(Mod, File, Opts) -> +%%% output file went and load it, purging any old version. +purge_and_load(Mod, File, Opts) -> Dir = outdir(Opts), - File2 = filename:join(Dir, filename:basename(File, ".erl")), + Base = filename:basename(File, src_suffix(Opts)), + OutFile = filename:join(Dir, Base), case compile:output_generated(Opts) of true -> - Base = atom_to_list(Mod), - case filename:basename(File, ".erl") of + case atom_to_list(Mod) of Base -> code:purge(Mod), - check_load(code:load_abs(File2,Mod), Mod); + %% Note that load_abs() adds the object file suffix + case code:load_abs(OutFile, Mod) of + {error, _R}=Error -> Error; + _ -> {ok, Mod} + end; _OtherMod -> format("** Module name '~p' does not match file name '~tp' **~n", [Mod,File]), @@ -135,13 +336,6 @@ machine_load(Mod, File, Opts) -> ok end. -%%% This function previously warned if the loaded module was -%%% loaded from some other place than current directory. -%%% Now, loading from other than current directory is supposed to work. -%%% so this function does nothing special. -check_load({error, _R} = Error, _) -> Error; -check_load(_, Mod) -> {ok, Mod}. - %% Compile a list of modules %% enables the nice unix shell cmd %% erl -s c lc f1 f2 f3 @d c1=v1 @c2 @i IDir @o ODir -s erlang halt 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 c4586171ca..2a2f25dcd2 100644 --- a/lib/stdlib/src/filename.erl +++ b/lib/stdlib/src/filename.erl @@ -19,6 +19,9 @@ %% -module(filename). +-deprecated({find_src,1,next_major_release}). +-deprecated({find_src,2,next_major_release}). + %% Purpose: Provides generic manipulation of filenames. %% %% Generally, these functions accept filenames in the native format @@ -34,8 +37,8 @@ -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 +753,12 @@ 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) -- %% @@ -793,14 +800,7 @@ separators() -> | {'d', atom()}, ErrorReason :: 'non_existing' | 'preloaded' | 'interpreted'. find_src(Mod) -> - Default = [{"", ""}, {"ebin", "src"}, {"ebin", "esrc"}], - Rules = - case application:get_env(kernel, source_search_rules) of - undefined -> Default; - {ok, []} -> Default; - {ok, R} when is_list(R) -> R - end, - find_src(Mod, Rules). + find_src(Mod, []). -spec find_src(Beam, Rules) -> {SourceFile, Options} | {error, {ErrorReason, Module}} when @@ -816,44 +816,47 @@ find_src(Mod) -> ErrorReason :: 'non_existing' | 'preloaded' | 'interpreted'. find_src(Mod, Rules) when is_atom(Mod) -> find_src(atom_to_list(Mod), Rules); -find_src(File0, Rules) when is_list(File0) -> - Mod = list_to_atom(basename(File0, ".erl")), - File = rootname(File0, ".erl"), - case readable_file(File++".erl") of - true -> - try_file(File, Mod, Rules); - false -> - try_file(undefined, Mod, Rules) - end. - -try_file(File, Mod, Rules) -> +find_src(ModOrFile, Rules) when is_list(ModOrFile) -> + Extension = ".erl", + Mod = list_to_atom(basename(ModOrFile, Extension)), case code:which(Mod) of Possibly_Rel_Path when is_list(Possibly_Rel_Path) -> - {ok, Cwd} = file:get_cwd(), - Path = join(Cwd, Possibly_Rel_Path), - try_file(File, Path, Mod, Rules); + {ok, Cwd} = file:get_cwd(), + 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. -%% Then get the compilation options. -%% Returns: {SrcFile, Options} +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 filelib:is_regular(ModOrFileRoot++Extension) of + true -> + find_src_2(ModOrFileRoot, Mod); + false -> + 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 + end. -try_file(undefined, ObjFilename, Mod, Rules) -> - case get_source_file(ObjFilename, Mod, Rules) of - {ok, File} -> try_file(File, ObjFilename, Mod, Rules); - Error -> Error - end; -try_file(Src, _ObjFilename, Mod, _Rules) -> +%% Get the compilation options and return {SrcFileRoot, Options} +find_src_2(SrcRoot, Mod) -> List = case Mod:module_info(compile) of none -> []; List0 -> List0 end, Options = proplists:get_value(options, List, []), {ok, Cwd} = file:get_cwd(), - AbsPath = make_abs_path(Cwd, Src), + AbsPath = make_abs_path(Cwd, SrcRoot), {AbsPath, filter_options(dirname(AbsPath), Options, [])}. %% Filters the options. @@ -884,42 +887,6 @@ filter_options(Base, [_|Rest], Result) -> filter_options(_Base, [], Result) -> Result. -%% Gets the source file given path of object code and module name. - -get_source_file(Obj, Mod, Rules) -> - source_by_rules(dirname(Obj), atom_to_list(Mod), Rules). - -source_by_rules(Dir, Base, [{From, To}|Rest]) -> - case try_rule(Dir, Base, From, To) of - {ok, File} -> {ok, File}; - error -> source_by_rules(Dir, Base, Rest) - end; -source_by_rules(_Dir, _Base, []) -> - {error, source_file_not_found}. - -try_rule(Dir, Base, From, To) -> - case lists:suffix(From, Dir) of - true -> - NewDir = lists:sublist(Dir, 1, length(Dir)-length(From))++To, - Src = join(NewDir, Base), - case readable_file(Src++".erl") 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). diff --git a/lib/stdlib/src/otp_internal.erl b/lib/stdlib/src/otp_internal.erl index 5bf77a5160..2a0e3118d0 100644 --- a/lib/stdlib/src/otp_internal.erl +++ b/lib/stdlib/src/otp_internal.erl @@ -550,6 +550,13 @@ obsolete_1(overload, _, _) -> obsolete_1(rpc, safe_multi_server_call, A) when A =:= 2; A =:= 3 -> {removed, {rpc, multi_server_call, A}}; +%% Added in OTP 20. + +obsolete_1(filename, find_src, 1) -> + {deprecated, "deprecated; use filelib:find_source/1 instead"}; +obsolete_1(filename, find_src, 2) -> + {deprecated, "deprecated; use filelib:find_source/3 instead"}; + %% Removed in OTP 20. obsolete_1(erlang, hash, 2) -> diff --git a/lib/stdlib/src/shell_default.erl b/lib/stdlib/src/shell_default.erl index cd63ab28b5..a0c1d98513 100644 --- a/lib/stdlib/src/shell_default.erl +++ b/lib/stdlib/src/shell_default.erl @@ -23,7 +23,7 @@ -module(shell_default). --export([help/0,lc/1,c/1,c/2,nc/1,nl/1,l/1,i/0,pid/3,i/3,m/0,m/1,lm/0,mm/0, +-export([help/0,lc/1,c/1,c/2,c/3,nc/1,nl/1,l/1,i/0,pid/3,i/3,m/0,m/1,lm/0,mm/0, memory/0,memory/1,uptime/0, erlangrc/1,bi/1, regs/0, flush/0,pwd/0,ls/0,ls/1,cd/1, y/1, y/2, @@ -72,6 +72,7 @@ bi(I) -> c:bi(I). bt(Pid) -> c:bt(Pid). c(File) -> c:c(File). c(File, Opt) -> c:c(File, Opt). +c(File, Opt, Filter) -> c:c(File, Opt, Filter). cd(D) -> c:cd(D). erlangrc(X) -> c:erlangrc(X). flush() -> c:flush(). |