From a20eb61c2fdd027a89acd249eea4f452e4accfb8 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?H=C3=A5kan=20Mattsson?= Date: Mon, 1 Mar 2010 19:53:48 +0100 Subject: Add function zip:foldl/3 to iterate over zip archives This is the public interface of prim_zip:open/3, which has been used in earlier releases by both erl_prim_loader and escript. The new function can be used as a replacement for the undocumented function escript:foldl/3 that is likely to be removed without further notice. The error handling of prim_zip:open/3 (and prim_zip:foldl/3) has been improved in order to better suite a public interface. For example it could happen that a file or a zlib port could be left open in some errors cases. The documentation of the FileSpec parameter to zip:create/3 has been updated to show that file info can be explicitly specified. A FileSpec may contain {Filename, binary(), #file_info{}} elements. The function zip:create/3 was already prepared to partly support this, but now after a few minor fixes it is fully supported. --- lib/stdlib/doc/src/zip.xml | 90 +++++++++++++++++++++++++++++++++++-------- lib/stdlib/src/zip.erl | 80 ++++++++++++++++++++++++++------------ lib/stdlib/test/zip_SUITE.erl | 78 ++++++++++++++++++++++++++----------- 3 files changed, 186 insertions(+), 62 deletions(-) (limited to 'lib/stdlib') diff --git a/lib/stdlib/doc/src/zip.xml b/lib/stdlib/doc/src/zip.xml index af407f1925..4d98a20206 100644 --- a/lib/stdlib/doc/src/zip.xml +++ b/lib/stdlib/doc/src/zip.xml @@ -42,16 +42,18 @@

By convention, the name of a zip file should end in ".zip". To abide to the convention, you'll need to add ".zip" yourself to the name.

-

Zip archives are created with the - zip/2 or the +

Zip archives are created with the + zip/2 or the zip/3 function. (They are also available as create, to resemble the erl_tar module.)

-

To extract files from a zip archive, use the - unzip/1 or the +

To extract files from a zip archive, use the + unzip/1 or the unzip/2 function. (They are also available as extract.)

-

To return a list of the files in a zip archive, use the +

To fold a function over all files in a zip archive, use the + foldl_3.

+

To return a list of the files in a zip archive, use the list_dir/1 or the list_dir/2 function. (They are also available as table.)

@@ -132,7 +134,7 @@ zip_file() Name = filename() FileList = [FileSpec] - FileSpec = filename() | {filename(), binary()} + FileSpec = filename() | {filename(), binary()} | {filename(), binary(), #file_info{}} Options = [Option] Option = memory | cooked | verbose | {comment, Comment} | {cwd, CWD} | {compress, What} | {uncompress, What} What = all | [Extension] | {add, [Extension]} | {del, [Extension]} @@ -212,16 +214,16 @@ zip_file() all

means that all files will be compressed (as long - as they pass the uncompress condition).

 + as they pass the uncompress condition).

[Extension]

means that only files with exactly these extensions - will be compressed.

 + will be compressed.

{add,[Extension]}

adds these extensions to the list of compress - extensions.

 + extensions.

{del,[Extension]}

deletes these extensions from the list of compress - extensions.

 + extensions.

 {uncompress, What} @@ -231,16 +233,16 @@ zip_file() The following values of What are allowed:

all -

means that no files will be compressed.

 +

means that no files will be compressed.

 [Extension]

means that files with these extensions will be - uncompressed.

 + uncompressed.

{add,[Extension]}

adds these extensions to the list of uncompress - extensions.

 + extensions.

{del,[Extension]}

deletes these extensions from the list of uncompress - extensions.

 + extensions.

 @@ -283,7 +285,7 @@ zip_file() the unzip/2 function will only extract the files whose names are included in FileList. The full paths, including the names of all sub directories within - the zip archive, must be specified.

+ the zip archive, must be specified.

cooked @@ -326,6 +328,64 @@ zip_file() + + foldl(Fun, Acc0, Archive) -> {ok, Acc1} | {error, Reason} + Fold a function over all files in a zip archive + + Fun = fun(FileInArchive, GetInfo, GetBin, AccIn) -> AccOut + FileInArchive = filename() + GetInfo = fun() -> #file_info{} + GetBin = fun() -> binary() + Acc0 = Acc1 = AccIn = AccOut = term() + Archive = filename() | {filename(), binary()} + + +

The foldl/3 function + calls Fun(FileInArchive, GetInfo, GetBin, AccIn) on + successive files in the Archive, starting with AccIn + == Acc0. FileInArchive is the name that the file + has in the archive. GetInfo is a fun that returns info + about the the file. GetBin returns the contents of the + file. Both GetInfo and GetBin must be called + within the Fun. Their behavior is undefined if they are + called outside the context of the Fun. The Fun + must return a new accumulator which is passed to the next + call. foldl/3 returns the final value of the + accumulator. Acc0 is returned if the archive is + empty. It is not necessary to iterate over all files in the + archive. The iteration may be ended prematurely in a + controlled manner by throwing an exception.

+ +

For example:

+ 
+> Name = "dummy.zip".
+"dummy.zip"
+> {ok, {Name, Bin}} = zip:create(Name, [{"foo", <<"FOO">>}, {"bar", <<"BAR">>}], [memory]).
+{ok,{"dummy.zip",
+     <<80,75,3,4,20,0,0,0,0,0,74,152,97,60,171,39,212,26,3,0,
+       0,0,3,0,0,...>>}}
+> {ok, FileSpec} = zip:foldl(fun(N, I, B, Acc) -> [{N, B(), I()} | Acc] end, [], {Name, Bin}).
+{ok,[{"bar",<<"BAR">>,
+      {file_info,3,regular,read_write,
+                 {{2010,3,1},{19,2,10}},
+                 {{2010,3,1},{19,2,10}},
+                 {{2010,3,1},{19,2,10}},
+                 54,1,0,0,0,0,0}},
+     {"foo",<<"FOO">>,
+      {file_info,3,regular,read_write,
+                 {{2010,3,1},{19,2,10}},
+                 {{2010,3,1},{19,2,10}},
+                 {{2010,3,1},{19,2,10}},
+                 54,1,0,0,0,0,0}}]}
+> {ok, {Name, Bin}} = zip:create(Name, lists:reverse(FileSpec), [memory]).
+{ok,{"dummy.zip",
+     <<80,75,3,4,20,0,0,0,0,0,74,152,97,60,171,39,212,26,3,0,
+       0,0,3,0,0,...>>}}
+> catch zip:foldl(fun("foo", _, B, _) -> throw(B()); (_, _, _, Acc) -> Acc end, [], {Name, Bin}). 
+<<"FOO">>
+
+ + list_dir(Archive) -> RetValue list_dir(Archive, Options) diff --git a/lib/stdlib/src/zip.erl b/lib/stdlib/src/zip.erl index e76d588cb5..d41aeefa59 100644 --- a/lib/stdlib/src/zip.erl +++ b/lib/stdlib/src/zip.erl @@ -20,7 +20,7 @@ %% Basic api -export([unzip/1, unzip/2, extract/1, extract/2, - zip/2, zip/3, create/2, create/3, + zip/2, zip/3, create/2, create/3, foldl/3, list_dir/1, list_dir/2, table/1, table/2, t/1, tt/1]). @@ -38,7 +38,7 @@ zip_t/1, zip_tt/1, zip_list_dir/1, zip_list_dir/2, zip_close/1]). - + %% just for debugging zip server, not documented, not tested, not to be used -export([zip_get_state/1]). @@ -82,7 +82,7 @@ -record(openzip_opts, { output, % output object (fun) open_opts, % file:open options - cwd % directory to relate paths to + cwd % directory to relate paths to }). % openzip record, state for an open zip-file @@ -93,10 +93,10 @@ input, % archive io object (fun) output, % output io object (fun) zlib, % handle to open zlib - cwd % directory to relate paths to + cwd % directory to relate paths to }). -% Things that I would like to add to the public record #zip_file, +% Things that I would like to add to the public record #zip_file, % but can't as it would make things fail at upgrade. % Instead we use {#zip_file,#zip_file_extra} internally. -record(zip_file_extra, { @@ -278,7 +278,7 @@ file_name_search(Name,Files) -> [ZFile|_] -> ZFile; [] -> false end. - + %% %% add a file to an open archive %% openzip_add(File, OpenZip) -> %% case ?CATCH do_openzip_add(File, OpenZip) of @@ -344,6 +344,25 @@ do_unzip(F, Options) -> Input(close, In1), {ok, Files}. +%% Iterate over all files in a zip archive +foldl(Fun, Acc0, Archive) when is_function(Fun, 4) -> + ZipFun = + fun({Name, GetInfo, GetBin}, A) -> + A2 = Fun(Name, GetInfo, GetBin, A), + {true, false, A2} + end, + case prim_zip:open(ZipFun, Acc0, Archive) of + {ok, PrimZip, Acc1} -> + ok = prim_zip:close(PrimZip), + {ok, Acc1}; + {error, bad_eocd} -> + {error, "Not an archive file"}; + {error, Reason} -> + {error, Reason} + end; +foldl(_,_, _) -> + {error, einval}. + %% Create zip archive name F from Files or binaries %% %% Accepted options: @@ -383,7 +402,7 @@ list_dir(F, Options) -> do_list_dir(F, Options) -> Opts = get_list_dir_options(F, Options), - #list_dir_opts{input = Input, open_opts = OpO, + #list_dir_opts{input = Input, open_opts = OpO, raw_iterator = RawIterator} = Opts, In0 = Input({open, F, OpO}, []), {Info, In1} = get_central_dir(In0, RawIterator, Input), @@ -417,7 +436,7 @@ tt(F) when is_record(F, openzip) -> openzip_tt(F); tt(F) -> t(F, fun raw_long_print_info_etc/5). -%% option utils +%% option utils get_unzip_opt([], Opts) -> Opts; get_unzip_opt([verbose | Rest], Opts) -> @@ -470,7 +489,7 @@ get_zip_opt([{cwd, CWD} | Rest], Opts) -> get_zip_opt([{comment, C} | Rest], Opts) -> get_zip_opt(Rest, Opts#zip_opts{comment = C}); get_zip_opt([{compress, Which} = O| Rest], Opts) -> - Which2 = + Which2 = case Which of all -> all; @@ -485,7 +504,7 @@ get_zip_opt([{compress, Which} = O| Rest], Opts) -> end, get_zip_opt(Rest, Opts#zip_opts{compress = Which2}); get_zip_opt([{uncompress, Which} = O| Rest], Opts) -> - Which2 = + Which2 = case Which of all -> all; @@ -560,16 +579,24 @@ get_openzip_options(Options) -> get_input(F) when is_binary(F) -> fun binary_io/2; get_input(F) when is_list(F) -> - fun file_io/2. + fun file_io/2; +get_input(_) -> + throw(einval). get_zip_input({F, B}) when is_binary(B), is_list(F) -> fun binary_io/2; +get_zip_input({F, B, #file_info{}}) when is_binary(B), is_list(F) -> + fun binary_io/2; +get_zip_input({F, #file_info{}, B}) when is_binary(B), is_list(F) -> + fun binary_io/2; get_zip_input(F) when is_list(F) -> fun file_io/2; get_zip_input({files, []}) -> fun binary_io/2; get_zip_input({files, [File | _]}) -> - get_zip_input(File). + get_zip_input(File); +get_zip_input(_) -> + throw(einval). get_list_dir_options(F, Options) -> Opts = #list_dir_opts{raw_iterator = fun raw_file_info_public/5, @@ -620,6 +647,8 @@ put_eocd(N, Pos, Sz, Comment, Output, Out0) -> get_filename({Name, _}, Type) -> get_filename(Name, Type); +get_filename({Name, _, _}, Type) -> + get_filename(Name, Type); get_filename(Name, regular) -> Name; get_filename(Name, directory) -> @@ -895,7 +924,7 @@ local_file_header_to_bin( CompSize:32/little, UncompSize:32/little, FileNameLength:16/little, - ExtraFieldLength:16/little>>. + ExtraFieldLength:16/little>>. eocd_to_bin(#eocd{disk_num = DiskNum, start_disk_num = StartDiskNum, @@ -912,7 +941,7 @@ eocd_to_bin(#eocd{disk_num = DiskNum, Offset:32/little, ZipCommentLength:16/little>>. -%% put together a local file header +%% put together a local file header local_file_header_from_info_method_name(#file_info{mtime = MTime}, UncompSize, CompMethod, Name) -> @@ -939,7 +968,7 @@ server_loop(OpenZip) -> server_loop(NewOpenZip); Error -> From ! {self(), Error} - end; + end; {From, close} -> From ! {self(), openzip_close(OpenZip)}; {From, get} -> @@ -1024,7 +1053,7 @@ lists_foreach(F, [Hd|Tl]) -> F(Hd), lists_foreach(F, Tl). -%% option utils +%% option utils get_openzip_opt([], Opts) -> Opts; get_openzip_opt([cooked | Rest], #openzip_opts{open_opts = OO} = Opts) -> @@ -1121,7 +1150,7 @@ raw_file_info_public(CD, FileName, FileComment, BExtraField, Acc0) -> Other -> Other end, [H2|T]. - + %% make a file_info from a central directory header cd_file_header_to_file_info(FileName, @@ -1213,8 +1242,8 @@ get_z_file(In0, Z, Input, Output, OpO, FB, CWD, {ZipFile,Extra}) -> {dir, In3}; _ -> %% FileInfo = local_file_header_to_file_info(LH) - %%{Out, In4, CRC, UncompSize} = - {Out, In4, CRC, _UncompSize} = + %%{Out, In4, CRC, UncompSize} = + {Out, In4, CRC, _UncompSize} = get_z_data(CompMethod, In3, FileName1, CompSize, Input, Output, OpO, Z), In5 = skip_z_data_descriptor(GPFlag, Input, In4), @@ -1280,7 +1309,7 @@ get_z_data_loop(CompSize, UncompSize, In0, Out0, Input, Output, Z) -> Out1 = Output({write, Uncompressed}, Out0), get_z_data_loop(CompSize-N, UncompSize + iolist_size(Uncompressed), In1, Out1, Input, Output, Z) - end. + end. %% skip data descriptor if any @@ -1298,7 +1327,7 @@ dos_date_time_to_datetime(DosDate, DosTime) -> <> = <>, <> = <>, {{YearFrom1980+1980, Month, Day}, - {Hour, Min, Sec}}. + {Hour, Min, Sec}}. dos_date_time_from_datetime({{Year, Month, Day}, {Hour, Min, Sec}}) -> YearFrom1980 = Year-1980, @@ -1319,7 +1348,6 @@ unix_extra_field_and_var_from_bin(< throw(bad_unix_extra_field). - %% A pwrite-like function for iolists (used by memory-option) @@ -1478,6 +1506,8 @@ local_file_header_from_bin(_) -> %% io functions binary_io({file_info, {_Filename, _B, #file_info{} = FI}}, _A) -> FI; +binary_io({file_info, {_Filename, #file_info{} = FI, _B}}, _A) -> + FI; binary_io({file_info, {_Filename, B}}, A) -> binary_io({file_info, B}, A); binary_io({file_info, B}, _) -> @@ -1493,9 +1523,11 @@ binary_io({file_info, B}, _) -> links = 1, major_device = 0, minor_device = 0, inode = 0, uid = 0, gid = 0}; -binary_io({open, {_Filename, B, _FI}, _Opts}, _) -> +binary_io({open, {_Filename, B, _FI}, _Opts}, _) when is_binary(B) -> + {0, B}; +binary_io({open, {_Filename, _FI, B}, _Opts}, _) when is_binary(B) -> {0, B}; -binary_io({open, {_Filename, B}, _Opts}, _) -> +binary_io({open, {_Filename, B}, _Opts}, _) when is_binary(B) -> {0, B}; binary_io({open, B, _Opts}, _) when is_binary(B) -> {0, B}; diff --git a/lib/stdlib/test/zip_SUITE.erl b/lib/stdlib/test/zip_SUITE.erl index 12ca655000..48b14396c1 100644 --- a/lib/stdlib/test/zip_SUITE.erl +++ b/lib/stdlib/test/zip_SUITE.erl @@ -18,12 +18,13 @@ %% -module(zip_SUITE). --export([all/1, borderline/1, atomic/1, +-export([all/1, borderline/1, atomic/1, bad_zip/1, unzip_from_binary/1, unzip_to_binary/1, zip_to_binary/1, unzip_options/1, zip_options/1, list_dir_options/1, aliases/1, openzip_api/1, zip_api/1, unzip_jar/1, - compress_control/1]). + compress_control/1, + foldl/1]). -include("test_server.hrl"). -include("test_server_line.hrl"). @@ -35,7 +36,8 @@ all(suite) -> [borderline, atomic, bad_zip, zip_to_binary, unzip_options, zip_options, list_dir_options, aliases, openzip_api, zip_api, unzip_jar, - compress_control]. + compress_control, + foldl]. borderline(doc) -> ["Test creating, listing and extracting one file from an archive " @@ -110,17 +112,17 @@ get_data(Port, Expect) -> {Port, {data, Bytes}} -> get_data(Port, match_output(Bytes, Expect, Port)); {Port, eof} -> - Port ! {self(), close}, + Port ! {self(), close}, receive {Port, closed} -> true - end, + end, receive - {'EXIT', Port, _} -> + {'EXIT', Port, _} -> ok after 1 -> % force context switch ok - end, + end, match_output(eof, Expect, Port) end. @@ -290,7 +292,7 @@ unzip_options(Config) when is_list(Config) -> DataDir = ?config(data_dir, Config), PrivDir = ?config(priv_dir, Config), Long = filename:join(DataDir, "abc.zip"), - + %% create a temp directory Subdir = filename:join(PrivDir, "t"), ok = file:make_dir(Subdir), @@ -303,7 +305,7 @@ unzip_options(Config) when is_list(Config) -> %% Verify. ?line true = (length(FList) =:= length(RetList)), - ?line lists:foreach(fun(F)-> {ok,B} = file:read_file(filename:join(DataDir, F)), + ?line lists:foreach(fun(F)-> {ok,B} = file:read_file(filename:join(DataDir, F)), {ok,B} = file:read_file(filename:join(Subdir, F)) end, FList), ?line lists:foreach(fun(F)-> ok = file:delete(F) end, @@ -321,7 +323,7 @@ unzip_jar(Config) when is_list(Config) -> DataDir = ?config(data_dir, Config), PrivDir = ?config(priv_dir, Config), JarFile = filename:join(DataDir, "test.jar"), - + %% create a temp directory Subdir = filename:join(PrivDir, "jartest"), ok = file:make_dir(Subdir), @@ -479,7 +481,7 @@ unzip_to_binary(Config) when is_list(Config) -> DataDir = ?config(data_dir, Config), PrivDir = ?config(priv_dir, Config), - delete_all_in(PrivDir), + delete_all_in(PrivDir), file:set_cwd(PrivDir), Long = filename:join(DataDir, "abc.zip"), @@ -595,17 +597,17 @@ do_delete_files([],Cnt) -> Cnt; do_delete_files([Item|Rest], Cnt) -> case file:delete(Item) of - ok -> + ok -> DelCnt = 1; {error,eperm} -> file:change_mode(Item, 8#777), DelCnt = delete_files(filelib:wildcard(filename:join(Item, "*"))), - file:del_dir(Item); + file:del_dir(Item); {error,eacces} -> %% We'll see about that! file:change_mode(Item, 8#777), case file:delete(Item) of - ok -> + ok -> DelCnt = 1; {error,_} -> erlang:yield(), @@ -643,22 +645,22 @@ compress_control(Config) when is_list(Config) -> ], test_compress_control(Dir, - Files, + Files, [{compress, []}], []), test_compress_control(Dir, - Files, + Files, [{uncompress, all}], []), test_compress_control(Dir, - Files, + Files, [{uncompress, []}], [".txt", ".exe", ".zip", ".lzh", ".arj"]), test_compress_control(Dir, - Files, + Files, [], [".txt", ".exe"]), @@ -686,7 +688,7 @@ test_compress_control(Dir, Files, ZipOptions, Expected) -> create_files(Files), {ok, Zip} = zip:create(Zip, [Dir], ZipOptions), - + {ok, OpenZip} = zip:openzip_open(Zip, [memory]), {ok,[#zip_comment{comment = ""} | ZipList]} = zip:openzip_list_dir(OpenZip), io:format("compress_control: -> ~p -> ~p\n -> ~pn", [Expected, ZipOptions, ZipList]), @@ -698,19 +700,19 @@ test_compress_control(Dir, Files, ZipOptions, Expected) -> delete_files(lists:reverse(Names)), % Remove plain files before directories ok. - + verify_compression([{Name, Kind, _Filler} | Files], ZipList, OpenZip, ZipOptions, Expected) -> {Name2, BinSz} = case Kind of - dir -> + dir -> {Name ++ "/", 0}; - _ -> + _ -> {ok, {Name, Bin}} = zip:openzip_get(Name, OpenZip), {Name, size(Bin)} end, {Name2, {value, ZipFile}} = {Name2, lists:keysearch(Name2, #zip_file.name, ZipList)}, #zip_file{info = #file_info{size = InfoSz, type = InfoType}, comp_size = InfoCompSz} = ZipFile, - + Ext = filename:extension(Name), IsComp = is_compressed(Ext, Kind, ZipOptions), ExpComp = lists:member(Ext, Expected), @@ -757,3 +759,33 @@ extensions([H | T], Old) -> extensions([], Old) -> Old. +foldl(Config) -> + PrivDir = ?config(priv_dir, Config), + File = filename:join([PrivDir, "foldl.zip"]), + + FooBin = <<"FOO">>, + BarBin = <<"BAR">>, + Files = [{"foo", FooBin}, {"bar", BarBin}], + ?line {ok, {File, Bin}} = zip:create(File, Files, [memory]), + ZipFun = fun(N, I, B, Acc) -> [{N, B(), I()} | Acc] end, + ?line {ok, FileSpec} = zip:foldl(ZipFun, [], {File, Bin}), + ?line [{"bar", BarBin, #file_info{}}, {"foo", FooBin, #file_info{}}] = FileSpec, + ?line {ok, {File, Bin}} = zip:create(File, lists:reverse(FileSpec), [memory]), + ?line {foo_bin, FooBin} = + try + zip:foldl(fun("foo", _, B, _) -> throw(B()); (_, _, _, Acc) -> Acc end, [], {File, Bin}) + catch + throw:FooBin -> + {foo_bin, FooBin} + end, + ?line ok = file:write_file(File, Bin), + ?line {ok, FileSpec} = zip:foldl(ZipFun, [], File), + + ?line {error, einval} = zip:foldl(fun() -> ok end, [], File), + ?line {error, einval} = zip:foldl(ZipFun, [], 42), + ?line {error, einval} = zip:foldl(ZipFun, [], {File, 42}), + + ?line ok = file:delete(File), + ?line {error, enoent} = zip:foldl(ZipFun, [], File), + + ok. -- cgit v1.2.3 From 31b790bdf8442a7eee22bfad0887d42278ffc18b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?H=C3=A5kan=20Mattsson?= Date: Mon, 1 Mar 2010 16:22:39 +0100 Subject: Add functions to create and extract escripts Both reltool and rebar needs to parse escripts. They are currently using an undocumented function called escript:foldl/3. It folds a function over all files in the body of an escript. If the body contains source code the function compiles it and the gives debug compiled beam code to the fold fun. If the body is an archive the fun is applied for all files in the archive. Instead of making the undocumented function public, the new functions escript:create/2 and escript:extract/2 has been introduced. Together with the new zip:foldl/3 function they have the same functionality as escript:foldl/3 in a more flexible and generic way. escript:foldl/3 should be removed as soon as reltool and rebar has been adopted to use the new functions. The simplest way for reltool and rebar to do this is to just copy the code from escript_SUITE:escript_foldl/3, which happens to provide a future compatible implementation of an emulated escript:foldl/3 function. I was quite hesitant when I introduced the compile_source option. It feels that it does not belong there but the alternative felt worse. The rationale for the compile_source option is that it is a bit cumbersome to compile the source code, as the source in most cases is partial. In order to do compile the source you need to know about some internals in escript. Without compile_source I think that these internals should be documented. Further you need to duplicate parts of the code. Without the compile_source option you need to first parse the source to forms, using an undocumented function in epp with an extended format of predefined macros which also is undocumented. Then you need to investigate the forms to see if you need to add an export form for main. When that is done you can run the rest of the compiler passes as usual. It is not so much code (60 lines or so) to write, but I do not want to urge people to write it. I actually wrote the code (see escript_SUITE:escript_foldl/3) before I decided to introduce the compile_source option. --- lib/stdlib/src/escript.erl | 401 ++++++++++++++++++++++++++++++-------- lib/stdlib/test/escript_SUITE.erl | 396 ++++++++++++++++++++++++++++++------- 2 files changed, 650 insertions(+), 147 deletions(-) (limited to 'lib/stdlib') diff --git a/lib/stdlib/src/escript.erl b/lib/stdlib/src/escript.erl index 5958a58d7c..bf32e15209 100644 --- a/lib/stdlib/src/escript.erl +++ b/lib/stdlib/src/escript.erl @@ -19,11 +19,17 @@ -module(escript). %% Useful functions that can be called from scripts. --export([script_name/0, foldl/3]). +-export([script_name/0, create/2, extract/2]). +-export([foldl/3]). % Undocumented function that will be removed %% Internal API. -export([start/0, start/1]). +-include_lib("kernel/include/file.hrl"). + +-define(SHEBANG, "/usr/bin/env escript"). +-define(COMMENT, "This is an -*- erlang -*- file"). + -record(state, {file, module, forms_or_bin, @@ -32,46 +38,247 @@ mode, exports_main, has_records}). - +-record(sections, {type, + shebang, + comment, + emu_args, + body}). +-record(extract_options, {compile_source}). + +-type shebang() :: string(). +-type comment() :: string(). +-type emu_args() :: string(). +-type escript_filename() :: string(). +-type filename() :: string(). +-type zip_file() :: + filename() + | {filename(), binary()} + | {filename(), binary(), #file_info{}}. +-type zip_create_option() :: term(). +-type section() :: + shebang + | {shebang, shebang()} + | comment + | {comment, comment()} + | {emu_args, emu_args()} + | {source, filename() | binary()} + | {beam, filename() | binary()} + | {archive, filename() | binary()} + | {archive, [zip_file()], [zip_create_option()]}. + +%% Create a complete escript file with both header and body +-spec create(escript_filename() | binary, [section()]) -> + ok | {ok, binary()} | {error, term()}. + +create(File, Options) when is_list(Options) -> + try + S = prepare(Options, #sections{}), + BinList = + [Section || Section <- [S#sections.shebang, + S#sections.comment, + S#sections.emu_args, + S#sections.body], + Section =/= undefined], + case File of + binary -> + {ok, list_to_binary(BinList)}; + _ -> + case file:write_file(File, BinList) of + ok -> + ok; + {error, Reason} -> + {error, {Reason, File}} + end + end + catch + throw:PrepareReason -> + {error, PrepareReason} + end. + +prepare([H | T], S) -> + case H of + {shebang, undefined} -> + prepare(T, S); + shebang -> + prepare(T, S#sections{shebang = "#!" ++ ?SHEBANG ++ "\n"}); + {shebang, default} -> + prepare(T, S#sections{shebang = "#!" ++ ?SHEBANG ++ "\n"}); + {shebang, Shebang} when is_list(Shebang) -> + prepare(T, S#sections{shebang = "#!" ++ Shebang ++ "\n"}); + {comment, undefined} -> + prepare(T, S); + comment -> + prepare(T, S#sections{comment = "%% " ++ ?COMMENT ++ "\n"}); + {comment, default} -> + prepare(T, S#sections{comment = "%% " ++ ?COMMENT ++ "\n"}); + {comment, Comment} when is_list(Comment) -> + prepare(T, S#sections{comment = "%% " ++ Comment ++ "\n"}); + {emu_args, undefined} -> + prepare(T, S); + {emu_args, Args} when is_list(Args) -> + prepare(T, S#sections{emu_args = "%%!" ++ Args ++ "\n"}); + {Type, File} when is_list(File) -> + case file:read_file(File) of + {ok, Bin} -> + prepare(T, S#sections{type = Type, body = Bin}); + {error, Reason} -> + throw({Reason, H}) + end; + {Type, Bin} when is_binary(Bin) -> + prepare(T, S#sections{type = Type, body = Bin}); + {archive = Type, ZipFiles, ZipOptions} + when is_list(ZipFiles), is_list(ZipOptions) -> + File = "dummy.zip", + case zip:create(File, ZipFiles, ZipOptions ++ [memory]) of + {ok, {File, ZipBin}} -> + prepare(T, S#sections{type = Type, body = ZipBin}); + {error, Reason} -> + throw({Reason, H}) + end; + _ -> + throw({badarg, H}) + end; +prepare([], #sections{body = undefined}) -> + throw(missing_body); +prepare([], #sections{type = Type} = S) + when Type =:= source; Type =:= beam; Type =:= archive -> + S; +prepare([], #sections{type = Type}) -> + throw({illegal_type, Type}); +prepare(BadOptions, _) -> + throw({badarg, BadOptions}). + +-type section_name() :: shebang | comment | emu_args | body . +-type extract_option() :: compile_source | {section, [section_name()]}. +-spec extract(filename(), [extract_option()]) -> {ok, [section()]} | {error, term()}. +extract(File, Options) when is_list(File), is_list(Options) -> + try + EO = parse_extract_options(Options, + #extract_options{compile_source = false}), + {HeaderSz, NextLineNo, Fd, Sections} = + parse_header(File, not EO#extract_options.compile_source), + Type = Sections#sections.type, + case {Type, EO#extract_options.compile_source} of + {source, true} -> + Bin = compile_source(Type, File, Fd, NextLineNo, HeaderSz); + {_, _} -> + ok = file:close(Fd), + case file:read_file(File) of + {ok, <<_Header:HeaderSz/binary, Bin/binary>>} -> + ok; + {error, ReadReason} -> + Bin = get_rid_of_compiler_warning, + throw(ReadReason) + end + end, + return_sections(Sections, Bin) + catch + throw:Reason -> + {error, Reason} + end. + +parse_extract_options([H | T], EO) -> + case H of + compile_source -> + EO2 = EO#extract_options{compile_source = true}, + parse_extract_options(T, EO2); + _ -> + throw({badarg, H}) + end; +parse_extract_options([], EO) -> + EO. + +compile_source(Type, File, Fd, NextLineNo, HeaderSz) -> + {text, _Module, Forms, _HasRecs, _Mode} = + do_parse_file(Type, File, Fd, NextLineNo, HeaderSz, false), + ok = file:close(Fd), + case compile:forms(Forms, [return_errors, debug_info]) of + {ok, _, BeamBin} -> + BeamBin; + {error, Errors, Warnings} -> + throw({compile, [{errors, format_errors(Errors)}, + {warnings, format_errors(Warnings)}]}) + end. + +format_errors(CompileErrors) -> + [lists:flatten([File, ":", integer_to_list(LineNo), ": ", + Mod:format_error(Error)]) || + {File, FileErrors} <- CompileErrors, + {LineNo, Mod, Error} <- FileErrors]. + +return_sections(S, Bin) -> + {ok, [normalize_section(shebang, S#sections.shebang), + normalize_section(comment, S#sections.comment), + normalize_section(emu_args, S#sections.emu_args), + normalize_section(S#sections.type, Bin)]}. + +normalize_section(Name, undefined) -> + {Name, undefined}; +normalize_section(shebang, "#!" ++ Chars) -> + Chopped = string:strip(Chars, right, $\n), + Stripped = string:strip(Chopped, both), + if + Stripped =:= ?SHEBANG -> + {shebang, default}; + true -> + {shebang, Stripped} + end; +normalize_section(comment, Chars) -> + Chopped = string:strip(Chars, right, $\n), + Stripped = string:strip(string:strip(Chopped, left, $%), both), + if + Stripped =:= ?COMMENT -> + {comment, default}; + true -> + {comment, Stripped} + end; +normalize_section(emu_args, "%%!" ++ Chars) -> + Chopped = string:strip(Chars, right, $\n), + Stripped = string:strip(Chopped, both), + {emu_args, Stripped}; +normalize_section(Name, Chars) -> + {Name, Chars}. + +-spec script_name() -> string(). script_name() -> [ScriptName|_] = init:get_plain_arguments(), ScriptName. %% Apply Fun(Name, GetInfo, GetBin, Acc) for each file in the escript. -%% +%% %% Fun/2 must return a new accumulator which is passed to the next call. %% The function returns the final value of the accumulator. Acc0 is %% returned if the escript contain an empty archive. -%% +%% %% GetInfo/0 is a fun that returns a #file_info{} record for the file. %% GetBin/0 is a fun that returns a the contents of the file as a binary. %% %% An escript may contain erlang code, beam code or an archive: %% -%% archive - the Fun/2 will be applied for each file in the archive -%% beam - the Fun/2 will be applied once and GetInfo/0 returns the file +%% archive - the Fun/4 will be applied for each file in the archive +%% beam - the Fun/4 will be applied once and GetInfo/0 returns the file %% info for the (entire) escript file -%% erl - the Fun/2 will be applied once, GetInfo/0 returns the file +%% erl - the Fun/4 will be applied once, GetInfo/0 returns the file %% info for the (entire) escript file and the GetBin returns %% the compiled beam code -%%-spec foldl(fun((string(), -%% fun(() -> #file_info()), -%% fun(() -> binary() -> term()), -%% term()) -> term()), -%% term(), -%% string()). +-spec foldl(fun((string(), + fun(() -> #file_info{}), + fun(() -> binary()), + term()) -> term()), + term(), + string()) -> {ok, term()} | {error, term()}. foldl(Fun, Acc0, File) when is_function(Fun, 4) -> case parse_file(File, false) of {text, _, Forms, _HasRecs, _Mode} when is_list(Forms) -> - GetInfo = fun() -> file:read_file_info(File) end, + GetInfo = fun() -> {ok, FI} = file:read_file_info(File), FI end, GetBin = fun() -> case compile:forms(Forms, [return_errors, debug_info]) of {ok, _, BeamBin} -> BeamBin; {error, _Errors, _Warnings} -> - fatal("There were compilation errors.") + throw("There were compilation errors.") end end, try @@ -81,7 +288,7 @@ foldl(Fun, Acc0, File) when is_function(Fun, 4) -> {error, Reason} end; {beam, _, BeamBin, _HasRecs, _Mode} when is_binary(BeamBin) -> - GetInfo = fun() -> file:read_file_info(File) end, + GetInfo = fun() -> {ok, FI} = file:read_file_info(File), FI end, GetBin = fun() -> BeamBin end, try {ok, Fun(".", GetInfo, GetBin, Acc0)} @@ -110,11 +317,13 @@ foldl(Fun, Acc0, File) when is_function(Fun, 4) -> %% Internal API. %% +-spec start() -> no_return(). start() -> start([]). +-spec start([string()]) -> no_return(). start(EscriptOptions) -> - try + try %% Commands run using -run or -s are run in a process %% trap_exit set to false. Because this behaviour is %% surprising for users of escript, make sure to reset @@ -143,11 +352,11 @@ parse_and_run(File, Args, Options) -> parse_file(File, CheckOnly), Mode2 = case lists:member("d", Options) of - true -> + true -> debug; false -> case lists:member("c", Options) of - true -> + true -> compile; false -> case lists:member("i", Options) of @@ -177,7 +386,7 @@ parse_and_run(File, Args, Options) -> _Other -> fatal("There were compilation errors.") end - end; + end; is_binary(FormsOrBin) -> case Source of archive -> @@ -190,11 +399,13 @@ parse_and_run(File, Args, Options) -> true -> my_halt(0); false -> - Text = lists:concat(["Function ", Module, ":main/1 is not exported"]), + Text = lists:concat(["Function ", Module, + ":main/1 is not exported"]), fatal(Text) end; _ -> - Text = lists:concat(["Cannot load module ", Module, " from archive"]), + Text = lists:concat(["Cannot load module ", Module, + " from archive"]), fatal(Text) end; ok -> @@ -212,7 +423,7 @@ parse_and_run(File, Args, Options) -> run -> {module, Module} = code:load_binary(Module, File, FormsOrBin), run(Module, Args); - debug -> + debug -> [Base | Rest] = lists:reverse(filename:split(File)), Base2 = filename:basename(Base, code:objfile_extension()), Rest2 = @@ -222,8 +433,8 @@ parse_and_run(File, Args, Options) -> end, SrcFile = filename:join(lists:reverse([Base2 ++ ".erl" | Rest2])), debug(Module, {Module, SrcFile, File, FormsOrBin}, Args) - end - end + end + end end. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @@ -231,25 +442,19 @@ parse_and_run(File, Args, Options) -> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% parse_file(File, CheckOnly) -> - S = #state{file = File, - n_errors = 0, - mode = interpret, - exports_main = false, - has_records = false}, - {ok, Fd} = - case file:open(File, [read]) of - {ok, Fd0} -> - {ok, Fd0}; - {error, R} -> - fatal(lists:concat([file:format_error(R), ": '", File, "'"])) - end, - {HeaderSz, StartLine, ScriptType} = skip_header(Fd, 1), + {HeaderSz, NextLineNo, Fd, Sections} = + parse_header(File, false), + do_parse_file(Sections#sections.type, + File, Fd, NextLineNo, HeaderSz, CheckOnly). + +do_parse_file(Type, File, Fd, NextLineNo, HeaderSz, CheckOnly) -> + S = initial_state(File), #state{mode = Mode, source = Source, module = Module, forms_or_bin = FormsOrBin, has_records = HasRecs} = - case ScriptType of + case Type of archive -> %% Archive file ok = file:close(Fd), @@ -260,51 +465,93 @@ parse_file(File, CheckOnly) -> parse_beam(S, File, HeaderSz, CheckOnly); source -> %% Source code - parse_source(S, File, Fd, StartLine, HeaderSz, CheckOnly) + parse_source(S, File, Fd, NextLineNo, HeaderSz, CheckOnly) end, {Source, Module, FormsOrBin, HasRecs, Mode}. +initial_state(File) -> + #state{file = File, + n_errors = 0, + mode = interpret, + exports_main = false, + has_records = false}. + %% Skip header and make a heuristic guess about the script type -skip_header(P, LineNo) -> +parse_header(File, KeepFirst) -> + LineNo = 1, + {ok, Fd} = + case file:open(File, [read]) of + {ok, Fd0} -> + {ok, Fd0}; + {error, R} -> + fatal(lists:concat([file:format_error(R), ": '", File, "'"])) + end, + %% Skip shebang on first line - {ok, HeaderSz0} = file:position(P, cur), - Line1 = get_line(P), + {ok, HeaderSz0} = file:position(Fd, cur), + Line1 = get_line(Fd), case classify_line(Line1) of shebang -> - find_first_body_line(P, LineNo); + find_first_body_line(Fd, HeaderSz0, LineNo, KeepFirst, + #sections{shebang = Line1}); archive -> - {HeaderSz0, LineNo, archive}; + {HeaderSz0, LineNo, Fd, + #sections{type = archive}}; beam -> - {HeaderSz0, LineNo, beam}; + {HeaderSz0, LineNo, Fd, + #sections{type = beam}}; _ -> - find_first_body_line(P, LineNo) + find_first_body_line(Fd, HeaderSz0, LineNo, KeepFirst, + #sections{}) end. -find_first_body_line(P, LineNo) -> - {ok, HeaderSz1} = file:position(P, cur), +find_first_body_line(Fd, HeaderSz0, LineNo, KeepFirst, Sections) -> + {ok, HeaderSz1} = file:position(Fd, cur), %% Look for special comment on second line - Line2 = get_line(P), - {ok, HeaderSz2} = file:position(P, cur), + Line2 = get_line(Fd), + {ok, HeaderSz2} = file:position(Fd, cur), case classify_line(Line2) of emu_args -> %% Skip special comment on second line - Line3 = get_line(P), - {HeaderSz2, LineNo + 2, guess_type(Line3)}; - _ -> + Line3 = get_line(Fd), + {HeaderSz2, LineNo + 2, Fd, + Sections#sections{type = guess_type(Line3), + comment = undefined, + emu_args = Line2}}; + Line2Type -> %% Look for special comment on third line - Line3 = get_line(P), - {ok, HeaderSz3} = file:position(P, cur), - case classify_line(Line3) of - emu_args -> + Line3 = get_line(Fd), + {ok, HeaderSz3} = file:position(Fd, cur), + Line3Type = classify_line(Line3), + if + Line3Type =:= emu_args -> %% Skip special comment on third line - Line4 = get_line(P), - {HeaderSz3, LineNo + 3, guess_type(Line4)}; - _ -> + Line4 = get_line(Fd), + {HeaderSz3, LineNo + 3, Fd, + Sections#sections{type = guess_type(Line4), + comment = Line2, + emu_args = Line3}}; + Sections#sections.shebang =:= undefined, + KeepFirst =:= true -> + %% No shebang. Use the entire file + {HeaderSz0, LineNo, Fd, + Sections#sections{type = guess_type(Line2)}}; + Sections#sections.shebang =:= undefined -> + %% No shebang. Skip the first line + {HeaderSz1, LineNo, Fd, + Sections#sections{type = guess_type(Line2)}}; + Line2Type =:= comment -> + %% Skip shebang on first line and comment on second + {HeaderSz2, LineNo + 2, Fd, + Sections#sections{type = guess_type(Line3), + comment = Line2}}; + true -> %% Just skip shebang on first line - {HeaderSz1, LineNo + 1, guess_type(Line2)} + {HeaderSz1, LineNo + 1, Fd, + Sections#sections{type = guess_type(Line2)}} end end. - + classify_line(Line) -> case Line of [$\#, $\! | _] -> @@ -313,8 +560,10 @@ classify_line(Line) -> archive; [$F, $O, $R, $1 | _] -> beam; - [$\%, $\%, $\! | _] -> + [$%, $%, $\! | _] -> emu_args; + [$% | _] -> + comment; _ -> undefined end. @@ -336,8 +585,8 @@ get_line(P) -> parse_archive(S, File, HeaderSz) -> case file:read_file(File) of - {ok, <<_FirstLine:HeaderSz/binary, Bin/binary>>} -> - Mod = + {ok, <<_Header:HeaderSz/binary, Bin/binary>>} -> + Mod = case init:get_argument(escript) of {ok, [["main", M]]} -> %% Use explicit module name @@ -345,14 +594,14 @@ parse_archive(S, File, HeaderSz) -> _ -> %% Use escript name without extension as module name RevBase = lists:reverse(filename:basename(File)), - RevBase2 = + RevBase2 = case lists:dropwhile(fun(X) -> X =/= $. end, RevBase) of [$. | Rest] -> Rest; [] -> RevBase end, list_to_atom(lists:reverse(RevBase2)) end, - + S#state{source = archive, mode = run, module = Mod, @@ -365,7 +614,7 @@ parse_archive(S, File, HeaderSz) -> parse_beam(S, File, HeaderSz, CheckOnly) -> - {ok, <<_FirstLine:HeaderSz/binary, Bin/binary>>} = + {ok, <<_Header:HeaderSz/binary, Bin/binary>>} = file:read_file(File), case beam_lib:chunks(Bin, [exports]) of {ok, {Module, [{exports, Exports}]}} -> @@ -399,7 +648,7 @@ parse_source(S, File, Fd, StartLine, HeaderSz, CheckOnly) -> {ok, FileForm} = epp:parse_erl_form(Epp), OptModRes = epp:parse_erl_form(Epp), S2 = S#state{source = text, module = Module}, - S3 = + S3 = case OptModRes of {ok, {attribute,_, module, M} = Form} -> epp_parse_file(Epp, S2#state{module = M}, [Form, FileForm]); @@ -448,12 +697,12 @@ check_source(S, CheckOnly) -> pre_def_macros(File) -> {MegaSecs, Secs, MicroSecs} = erlang:now(), - Replace = fun(Char) -> + Replace = fun(Char) -> case Char of $\. -> $\_; _ -> Char end - end, + end, CleanBase = lists:map(Replace, filename:basename(File)), ModuleStr = CleanBase ++ "__" ++ @@ -642,8 +891,8 @@ eval_exprs([E|Es], Bs0, Lf, Ef, RBs) -> eval_exprs(Es, Bs, Lf, Ef, RBs). format_exception(Class, Reason) -> - PF = fun(Term, I) -> - io_lib:format("~." ++ integer_to_list(I) ++ "P", [Term, 50]) + PF = fun(Term, I) -> + io_lib:format("~." ++ integer_to_list(I) ++ "P", [Term, 50]) end, StackTrace = erlang:get_stacktrace(), StackFun = fun(M, _F, _A) -> (M =:= erl_eval) or (M =:= ?MODULE) end, @@ -651,7 +900,7 @@ format_exception(Class, Reason) -> fatal(Str) -> throw(Str). - + my_halt(Reason) -> case process_info(group_leader(), status) of {_,waiting} -> @@ -675,7 +924,7 @@ hidden_apply(App, M, F, Args) -> Arity = length(Args), Text = io_lib:format("Call to ~w:~w/~w in application ~w failed.\n", [M, F, Arity, App]), - fatal(Text); + fatal(Text); Stk -> erlang:raise(error, undef, Stk) end diff --git a/lib/stdlib/test/escript_SUITE.erl b/lib/stdlib/test/escript_SUITE.erl index f36ae34633..77fd190e45 100644 --- a/lib/stdlib/test/escript_SUITE.erl +++ b/lib/stdlib/test/escript_SUITE.erl @@ -22,16 +22,20 @@ init_per_testcase/2, fin_per_testcase/2, basic/1, - errors/1, + errors/1, strange_name/1, emulator_flags/1, module_script/1, beam_script/1, archive_script/1, - epp/1 + epp/1, + create_and_extract/1, + foldl/1, + verify_sections/3 ]). -include("test_server.hrl"). +-include_lib("kernel/include/file.hrl"). all(suite) -> [ @@ -42,7 +46,9 @@ all(suite) -> module_script, beam_script, archive_script, - epp + epp, + create_and_extract, + foldl ]. init_per_testcase(_Case, Config) -> @@ -68,11 +74,11 @@ basic(Config) when is_list(Config) -> ?line run(Dir, "factorial_warning 20", [data_dir,<<"factorial_warning:12: Warning: function bar/0 is unused\n" "factorial 20 = 2432902008176640000\nExitCode:0">>]), - ?line run(Dir, "-s", "factorial_warning", + ?line run_with_opts(Dir, "-s", "factorial_warning", [data_dir,<<"factorial_warning:12: Warning: function bar/0 is unused\nExitCode:0">>]), - ?line run(Dir, "-s -i", "factorial_warning", + ?line run_with_opts(Dir, "-s -i", "factorial_warning", [data_dir,<<"factorial_warning:12: Warning: function bar/0 is unused\nExitCode:0">>]), - ?line run(Dir, "-c -s", "factorial_warning", + ?line run_with_opts(Dir, "-c -s", "factorial_warning", [data_dir,<<"factorial_warning:12: Warning: function bar/0 is unused\nExitCode:0">>]), ?line run(Dir, "filesize "++filename:join(?config(data_dir, Config),"filesize"), [data_dir,<<"filesize:11: Warning: function id/1 is unused\n324\nExitCode:0">>]), @@ -100,7 +106,7 @@ errors(Config) when is_list(Config) -> [data_dir,<<"lint_error:6: function main/1 already defined\n">>, data_dir,"lint_error:8: variable 'ExitCode' is unbound\n", <<"escript: There were compilation errors.\nExitCode:127">>]), - ?line run(Dir, "-s", "lint_error", + ?line run_with_opts(Dir, "-s", "lint_error", [data_dir,<<"lint_error:6: function main/1 already defined\n">>, data_dir,"lint_error:8: variable 'ExitCode' is unbound\n", <<"escript: There were compilation errors.\nExitCode:127">>]), @@ -140,31 +146,31 @@ module_script(Config) when is_list(Config) -> OrigFile = filename:join([Data,"emulator_flags"]), {ok, OrigBin} = file:read_file(OrigFile), ?line [Shebang, Mode, Flags | Source] = string:tokens(binary_to_list(OrigBin), "\n"), - ?line {ok, OrigFI} = file:read_file_info(OrigFile), + ?line {ok, OrigFI} = file:read_file_info(OrigFile), %% Write source file Priv = ?config(priv_dir, Config), Dir = filename:absname(Priv), % Get rid of trailing slash. Base = "module_script", ErlFile = filename:join([Priv, Base ++ ".erl"]), - ErlCode = ["-module(", Base, ").\n", + ErlCode = ["\n-module(", Base, ").\n", "-export([main/1]).\n\n", string:join(Source, "\n"), "\n"], ?line ok = file:write_file(ErlFile, ErlCode), - + %%%%%%% %% Create and run scripts without emulator flags %% With shebang NoArgsBase = Base ++ "_no_args_with_shebang", NoArgsFile = filename:join([Priv, NoArgsBase]), - ?line ok = file:write_file(NoArgsFile, + ?line ok = file:write_file(NoArgsFile, [Shebang, "\n", ErlCode]), ?line ok = file:write_file_info(NoArgsFile, OrigFI), - - ?line run(Dir, NoArgsBase ++ " -arg1 arg2 arg3", + + ?line run(Dir, NoArgsBase ++ " -arg1 arg2 arg3", [<<"main:[\"-arg1\",\"arg2\",\"arg3\"]\n" "nostick:[]\n" "mnesia:[]\n" @@ -172,7 +178,7 @@ module_script(Config) when is_list(Config) -> "unknown:[]\n" "ExitCode:0">>]), - ?line run(Dir, "", NoArgsBase ++ " -arg1 arg2 arg3", + ?line run_with_opts(Dir, "", NoArgsBase ++ " -arg1 arg2 arg3", [<<"main:[\"-arg1\",\"arg2\",\"arg3\"]\n" "nostick:[]\n" "mnesia:[]\n" @@ -183,33 +189,33 @@ module_script(Config) when is_list(Config) -> %% Without shebang NoArgsBase2 = Base ++ "_no_args_without_shebang", NoArgsFile2 = filename:join([Priv, NoArgsBase2]), - ?line ok = file:write_file(NoArgsFile2, + ?line ok = file:write_file(NoArgsFile2, ["Something else than shebang!!!", "\n", ErlCode]), ?line ok = file:write_file_info(NoArgsFile2, OrigFI), - - ?line run(Dir, "", NoArgsBase2 ++ " -arg1 arg2 arg3", + + ?line run_with_opts(Dir, "", NoArgsBase2 ++ " -arg1 arg2 arg3", [<<"main:[\"-arg1\",\"arg2\",\"arg3\"]\n" "nostick:[]\n" "mnesia:[]\n" "ERL_FLAGS=false\n" "unknown:[]\n" "ExitCode:0">>]), - + %% Plain module without header NoArgsBase3 = Base ++ "_no_args_without_header", NoArgsFile3 = filename:join([Priv, NoArgsBase3]), ?line ok = file:write_file(NoArgsFile3, [ErlCode]), ?line ok = file:write_file_info(NoArgsFile3, OrigFI), - - ?line run(Dir, "", NoArgsBase3 ++ " -arg1 arg2 arg3", + + ?line run_with_opts(Dir, "", NoArgsBase3 ++ " -arg1 arg2 arg3", [<<"main:[\"-arg1\",\"arg2\",\"arg3\"]\n" "nostick:[]\n" "mnesia:[]\n" "ERL_FLAGS=false\n" "unknown:[]\n" "ExitCode:0">>]), - + %%%%%%% %% Create and run scripts with emulator flags @@ -217,12 +223,12 @@ module_script(Config) when is_list(Config) -> ArgsBase = Base ++ "_args_with_shebang", ArgsFile = filename:join([Priv, ArgsBase]), ?line ok = file:write_file(ArgsFile, - [Shebang, "\n", + [Shebang, "\n", Mode, "\n", Flags, "\n", ErlCode]), - ?line ok = file:write_file_info(ArgsFile, OrigFI), - + ?line ok = file:write_file_info(ArgsFile, OrigFI), + ?line run(Dir, ArgsBase ++ " -arg1 arg2 arg3", [<<"main:[\"-arg1\",\"arg2\",\"arg3\"]\n" "nostick:[{nostick,[]}]\n" @@ -242,32 +248,32 @@ beam_script(Config) when is_list(Config) -> OrigFile = filename:join([Data,"emulator_flags"]), {ok, OrigBin} = file:read_file(OrigFile), ?line [Shebang, Mode, Flags | Source] = string:tokens(binary_to_list(OrigBin), "\n"), - ?line {ok, OrigFI} = file:read_file_info(OrigFile), + ?line {ok, OrigFI} = file:read_file_info(OrigFile), %% Write source file Priv = ?config(priv_dir, Config), Dir = filename:absname(Priv), % Get rid of trailing slash. Base = "beam_script", ErlFile = filename:join([Priv, Base ++ ".erl"]), - ?line ok = file:write_file(ErlFile, - ["-module(", Base, ").\n", + ?line ok = file:write_file(ErlFile, + ["\n-module(", Base, ").\n", "-export([main/1]).\n\n", string:join(Source, "\n"), "\n"]), %% Compile the code ?line {ok, _Mod, BeamCode} = compile:file(ErlFile, [binary]), - + %%%%%%% %% Create and run scripts without emulator flags %% With shebang NoArgsBase = Base ++ "_no_args_with_shebang", NoArgsFile = filename:join([Priv, NoArgsBase]), - ?line ok = file:write_file(NoArgsFile, + ?line ok = file:write_file(NoArgsFile, [Shebang, "\n", BeamCode]), - ?line ok = file:write_file_info(NoArgsFile, OrigFI), + ?line ok = file:write_file_info(NoArgsFile, OrigFI), ?line run(Dir, NoArgsBase ++ " -arg1 arg2 arg3", [<<"main:[\"-arg1\",\"arg2\",\"arg3\"]\n" @@ -277,7 +283,7 @@ beam_script(Config) when is_list(Config) -> "unknown:[]\n" "ExitCode:0">>]), - ?line run(Dir, "", NoArgsBase ++ " -arg1 arg2 arg3", + ?line run_with_opts(Dir, "", NoArgsBase ++ " -arg1 arg2 arg3", [<<"main:[\"-arg1\",\"arg2\",\"arg3\"]\n" "nostick:[]\n" "mnesia:[]\n" @@ -288,12 +294,12 @@ beam_script(Config) when is_list(Config) -> %% Without shebang NoArgsBase2 = Base ++ "_no_args_without_shebang", NoArgsFile2 = filename:join([Priv, NoArgsBase2]), - ?line ok = file:write_file(NoArgsFile2, + ?line ok = file:write_file(NoArgsFile2, ["Something else than shebang!!!", "\n", BeamCode]), - ?line ok = file:write_file_info(NoArgsFile2, OrigFI), + ?line ok = file:write_file_info(NoArgsFile2, OrigFI), - ?line run(Dir, "", NoArgsBase2 ++ " -arg1 arg2 arg3", + ?line run_with_opts(Dir, "", NoArgsBase2 ++ " -arg1 arg2 arg3", [<<"main:[\"-arg1\",\"arg2\",\"arg3\"]\n" "nostick:[]\n" "mnesia:[]\n" @@ -305,9 +311,9 @@ beam_script(Config) when is_list(Config) -> NoArgsBase3 = Base ++ "_no_args_without_header", NoArgsFile3 = filename:join([Priv, NoArgsBase3]), ?line ok = file:write_file(NoArgsFile3, [BeamCode]), - ?line ok = file:write_file_info(NoArgsFile3, OrigFI), + ?line ok = file:write_file_info(NoArgsFile3, OrigFI), - ?line run(Dir, "", NoArgsBase3 ++ " -arg1 arg2 arg3", + ?line run_with_opts(Dir, "", NoArgsBase3 ++ " -arg1 arg2 arg3", [<<"main:[\"-arg1\",\"arg2\",\"arg3\"]\n" "nostick:[]\n" "mnesia:[]\n" @@ -322,12 +328,12 @@ beam_script(Config) when is_list(Config) -> ArgsBase = Base ++ "_args", ArgsFile = filename:join([Priv, ArgsBase]), ?line ok = file:write_file(ArgsFile, - [Shebang, "\n", + [Shebang, "\n", Mode, "\n", Flags, "\n", BeamCode]), - ?line ok = file:write_file_info(ArgsFile, OrigFI), - + ?line ok = file:write_file_info(ArgsFile, OrigFI), + ?line run(Dir, ArgsBase ++ " -arg1 arg2 arg3", [<<"main:[\"-arg1\",\"arg2\",\"arg3\"]\n" "nostick:[{nostick,[]}]\n" @@ -356,13 +362,13 @@ archive_script(Config) when is_list(Config) -> ?line ok = compile_app(TopDir, "archive_script_dict"), ?line ok = compile_app(TopDir, "archive_script_dummy"), ?line {ok, MainFiles} = file:list_dir(TopDir), - ?line ok = compile_files(MainFiles, TopDir, TopDir), - + ?line ok = compile_files(MainFiles, TopDir, TopDir), + %% Create the archive {ok, TopFiles} = file:list_dir(TopDir), ?line {ok, {_, ArchiveBin}} = zip:create(Archive, TopFiles, [memory, {compress, []}, {cwd, TopDir}]), - + %% Read the source script OrigFile = filename:join([DataDir, "emulator_flags"]), {ok, OrigBin} = file:read_file(OrigFile), @@ -371,73 +377,73 @@ archive_script(Config) when is_list(Config) -> Flags = "%%! -archive_script_dict foo bar" " -archive_script_dict foo" " -archive_script_dummy bar", - ?line {ok, OrigFI} = file:read_file_info(OrigFile), - + ?line {ok, OrigFI} = file:read_file_info(OrigFile), + %%%%%%% %% Create and run scripts without emulator flags - MainBase = "archive_script_main", - MainScript = filename:join([PrivDir, MainBase]), + MainBase = "archive_script_main", + MainScript = filename:join([PrivDir, MainBase]), %% With shebang - ?line ok = file:write_file(MainScript, + ?line ok = file:write_file(MainScript, [Shebang, "\n", Flags, "\n", ArchiveBin]), - ?line ok = file:write_file_info(MainScript, OrigFI), - + ?line ok = file:write_file_info(MainScript, OrigFI), + ?line run(PrivDir, MainBase ++ " -arg1 arg2 arg3", - [<<"main:[\"-arg1\",\"arg2\",\"arg3\"]\n" + [<<"main:[\"-arg1\",\"arg2\",\"arg3\"]\n" "dict:[{archive_script_dict,[\"foo\",\"bar\"]},{archive_script_dict,[\"foo\"]}]\n" "dummy:[{archive_script_dummy,[\"bar\"]}]\n" "priv:{ok,<<\"Some private data...\\n\">>}\n" "ExitCode:0">>]), - ?line run(PrivDir, "", MainBase ++ " -arg1 arg2 arg3", - [<<"main:[\"-arg1\",\"arg2\",\"arg3\"]\n" + ?line run_with_opts(PrivDir, "", MainBase ++ " -arg1 arg2 arg3", + [<<"main:[\"-arg1\",\"arg2\",\"arg3\"]\n" "dict:[{archive_script_dict,[\"foo\",\"bar\"]},{archive_script_dict,[\"foo\"]}]\n" "dummy:[{archive_script_dummy,[\"bar\"]}]\n" "priv:{ok,<<\"Some private data...\\n\">>}\n" "ExitCode:0">>]), - + ?line ok = file:rename(MainScript, MainScript ++ "_with_shebang"), %% Without shebang (no flags) - ?line ok = file:write_file(MainScript, + ?line ok = file:write_file(MainScript, ["Something else than shebang!!!", "\n", ArchiveBin]), - ?line ok = file:write_file_info(MainScript, OrigFI), - - ?line run(PrivDir, "", MainBase ++ " -arg1 arg2 arg3", - [<<"main:[\"-arg1\",\"arg2\",\"arg3\"]\n" + ?line ok = file:write_file_info(MainScript, OrigFI), + + ?line run_with_opts(PrivDir, "", MainBase ++ " -arg1 arg2 arg3", + [<<"main:[\"-arg1\",\"arg2\",\"arg3\"]\n" "dict:[]\n" "dummy:[]\n" "priv:{ok,<<\"Some private data...\\n\">>}\n" "ExitCode:0">>]), ?line ok = file:rename(MainScript, MainScript ++ "_without_shebang"), - + %% Plain archive without header (no flags) - + ?line ok = file:write_file(MainScript, [ArchiveBin]), - ?line ok = file:write_file_info(MainScript, OrigFI), - - ?line run(PrivDir, "", MainBase ++ " -arg1 arg2 arg3", - [<<"main:[\"-arg1\",\"arg2\",\"arg3\"]\n" + ?line ok = file:write_file_info(MainScript, OrigFI), + + ?line run_with_opts(PrivDir, "", MainBase ++ " -arg1 arg2 arg3", + [<<"main:[\"-arg1\",\"arg2\",\"arg3\"]\n" "dict:[]\n" "dummy:[]\n" "priv:{ok,<<\"Some private data...\\n\">>}\n" "ExitCode:0">>]), ?line ok = file:rename(MainScript, MainScript ++ "_without_header"), - + %%%%%%% %% Create and run scripts with emulator flags AltBase = "archive_script_alternate_main", AltScript = filename:join([PrivDir, AltBase]), - ?line ok = file:write_file(AltScript, + ?line ok = file:write_file(AltScript, [Shebang, "\n", Mode, "\n", Flags, " -escript main archive_script_main2\n", ArchiveBin]), - ?line ok = file:write_file_info(AltScript, OrigFI), + ?line ok = file:write_file_info(AltScript, OrigFI), ?line run(PrivDir, AltBase ++ " -arg1 arg2 arg3", [<<"main2:[\"-arg1\",\"arg2\",\"arg3\"]\n" @@ -445,7 +451,7 @@ archive_script(Config) when is_list(Config) -> "dummy:[{archive_script_dummy,[\"bar\"]}]\n" "priv:{ok,<<\"Some private data...\\n\">>}\n" "ExitCode:0">>]), - + ok. compile_app(TopDir, AppName) -> @@ -482,6 +488,254 @@ epp(Config) when is_list(Config) -> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +create_and_extract(Config) when is_list(Config) -> + {NewFile, FileInfo, + EmuArg, Source, + _ErlBase, ErlCode, + _BeamBase, BeamCode, + ArchiveBin} = + prepare_creation("create_and_extract", Config), + + Bodies = + [[{source, ErlCode}], + [{beam, BeamCode}], + [{archive, ArchiveBin}]], + + %% Verify all combinations of scripts with shebangs + [verify_sections(NewFile, FileInfo, S ++ C ++ E ++ B) || + S <- [[{shebang, default}], + [{shebang, "/usr/bin/env escript"}]], + C <- [[], + [{comment, undefined}], + [{comment, default}], + [{comment, "This is a nonsense comment"}]], + E <- [[], + [{emu_args, undefined}], + [{emu_args, EmuArg}]], + B <- [[{source, Source}] | Bodies]], + + %% Verify all combinations of scripts without shebangs + [verify_sections(NewFile, FileInfo, S ++ C ++ E ++ B) || + S <- [[], [{shebang, undefined}]], + C <- [[], [{comment, undefined}]], + E <- [[], [{emu_args, undefined}]], + B <- Bodies], + + %% Verify the compile_source option + file:delete(NewFile), + ?line ok = escript:create(NewFile, [{source, Source}]), + ?line {ok, [_, _, _, {source, Source}]} = escript:extract(NewFile, []), + ?line {ok, [_, _, _, {source, BeamCode2}]} = + escript:extract(NewFile, [compile_source]), + verify_sections(NewFile, FileInfo, + [{shebang, default}, + {comment, default}, + {beam, BeamCode2}]), + + file:delete(NewFile), + ok. + +prepare_creation(Base, Config) -> + %% Read the source + PrivDir = ?config(priv_dir, Config), + DataDir = ?config(data_dir, Config), + OrigFile = filename:join([DataDir,"emulator_flags"]), + ?line {ok, FileInfo} = file:read_file_info(OrigFile), + NewFile = filename:join([PrivDir, Base]), + ?line {ok, [{shebang, default}, + {comment, _}, + {emu_args, EmuArg}, + {source, Source}]} = + escript:extract(OrigFile, []), + + %% Compile the code + ErlFile = NewFile ++ ".erl", + ErlCode = list_to_binary(["\n-module(", Base, ").\n", + "-export([main/1]).\n\n", + Source, "\n\n"]), + ?line ok = file:write_file(ErlFile, ErlCode), + + %% Compile the code + ?line {ok, _Mod, BeamCode} = + compile:file(ErlFile, [binary, debug_info]), + + %% Create an archive + ?line {ok, {_, ArchiveBin}} = + zip:create("dummy_archive_name", + [{Base ++ ".erl", ErlCode}, + {Base ++ ".beam", BeamCode}], + [{compress, []}, memory]), + {NewFile, FileInfo, + EmuArg, Source, + Base ++ ".erl", ErlCode, + Base ++ ".beam", BeamCode, + ArchiveBin}. + +verify_sections(File, FileInfo, Sections) -> + io:format("~p:verify_sections(\n\t~p,\n\t~p,\n\t~p).\n", + [?MODULE, File, FileInfo, Sections]), + + %% Create + file:delete(File), + ?line ok = escript:create(File, Sections), + ?line ok = file:write_file_info(File, FileInfo), + + %% Run + Dir = filename:absname(filename:dirname(File)), + Base = filename:basename(File), + + HasArg = fun(Tag) -> + case lists:keysearch(Tag, 1, Sections) of + false -> false; + {value, {_, undefined}} -> false; + {value, _} -> true + end + end, + ExpectedMain = <<"main:[\"-arg1\",\"arg2\",\"arg3\"]\n">>, + ExpectedOutput = + case HasArg(emu_args) of + true -> + <<"nostick:[{nostick,[]}]\n" + "mnesia:[{mnesia,[\"dir\",\"a/directory\"]},{mnesia,[\"debug\",\"verbose\"]}]\n" + "ERL_FLAGS=false\n" + "unknown:[]\n" + "ExitCode:0">>; + false -> + <<"nostick:[]\nmnesia:[]\nERL_FLAGS=false\nunknown:[]\nExitCode:0">> + end, + + InputArgs = Base ++ " -arg1 arg2 arg3", + Expected = <>, + case HasArg(shebang) of + true -> + ?line run(Dir, InputArgs, [Expected]); + false -> + ?line run_with_opts(Dir, [], InputArgs, [Expected]) + end, + + %% Verify + ?line {ok, Bin} = escript:create(binary, Sections), + ?line {ok, Read} = file:read_file(File), + ?line Bin = Read, % Assert + + Normalized = normalize_sections(Sections), + ?line {ok, Extracted} = escript:extract(File, []), + io:format("Normalized; ~p\n", [Normalized]), + io:format("Extracted ; ~p\n", [Extracted]), + ?line Normalized = Extracted, % Assert + ok. + +normalize_sections(Sections) -> + AtomToTuple = + fun(Val) -> + if + is_atom(Val) -> {Val, default}; + true -> Val + end + end, + case lists:map(AtomToTuple, [{K, V} || {K, V} <- Sections, V =/= undefined]) of + [{shebang, Shebang} | Rest] -> + [{shebang, Shebang} | + case Rest of + [{comment, Comment} | Rest2] -> + [{comment, Comment} | + case Rest2 of + [{emu_args, EmuArgs}, Body] -> + [{emu_args, EmuArgs}, Body]; + [Body] -> + [{emu_args, undefined}, Body] + end + ]; + [{emu_args, EmuArgs}, Body] -> + [{comment, undefined}, {emu_args, EmuArgs}, Body]; + [Body] -> + [{comment, undefined}, {emu_args, undefined}, Body] + end + ]; + [Body] -> + [{shebang, undefined}, {comment, undefined}, {emu_args, undefined}, Body] + end. +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + +foldl(Config) when is_list(Config) -> + {NewFile, _FileInfo, + _EmuArg, _Source, + ErlBase, ErlCode, + BeamBase, _BeamCode, + ArchiveBin} = + prepare_creation("foldl", Config), + + Collect = fun(Name, GetInfo, GetBin, Acc) -> + [{Name, GetInfo(), GetBin()} | Acc] + end, + + %% Get line numbers and the file attribute right + SourceFile = NewFile ++ ".erl", + <<_:1/binary, ErlCode2/binary>> = ErlCode, + ?line ok = file:write_file(SourceFile, ErlCode2), + ?line {ok, _Mod, BeamCode} = + compile:file(SourceFile, [binary, debug_info]), + + %% Verify source script + ?line ok = escript:create(SourceFile, [{source, ErlCode}]), + ?line {ok, [{".", _, BeamCode2}]} + = escript_foldl(Collect, [], SourceFile), + + ?line {ok, Abstr} = beam_lib:chunks(BeamCode, [abstract_code]), + ?line {ok, Abstr2} = beam_lib:chunks(BeamCode2, [abstract_code]), + %% io:format("abstr1=~p\n", [Abstr]), + %% io:format("abstr2=~p\n", [Abstr2]), + ?line Abstr = Abstr2, % Assert + + %% Verify beam script + ?line ok = escript:create(NewFile, [{beam, BeamCode}]), + ?line {ok, [{".", _, BeamCode}]} + = escript_foldl(Collect, [], NewFile), + + %% Verify archive scripts + ?line ok = escript:create(NewFile, [{archive, ArchiveBin}]), + ?line {ok, [{BeamBase, #file_info{}, _}, + {ErlBase, #file_info{}, _}]} + = escript_foldl(Collect, [], NewFile), + + ArchiveFiles = [{ErlBase, ErlCode}, {BeamBase, BeamCode}], + ?line ok = escript:create(NewFile, [{archive, ArchiveFiles, []}]), + ?line {ok, [{BeamBase, _, _}, + {ErlBase, _, _}]} + = escript_foldl(Collect, [], NewFile), + + ok. + +escript_foldl(Fun, Acc, File) -> + code:ensure_loaded(zip), + case erlang:function_exported(zip, foldl, 3) of + true -> + emulate_escript_foldl(Fun, Acc, File); + false -> + escript:foldl(Fun, Acc, File) + end. + +emulate_escript_foldl(Fun, Acc, File) -> + case escript:extract(File, [compile_source]) of + {ok, [_Shebang, _Comment, _EmuArgs, Body]} -> + case Body of + {source, BeamCode} -> + GetInfo = fun() -> file:read_file_info(File) end, + GetBin = fun() -> BeamCode end, + {ok, Fun(".", GetInfo, GetBin, Acc)}; + {beam, BeamCode} -> + GetInfo = fun() -> file:read_file_info(File) end, + GetBin = fun() -> BeamCode end, + {ok, Fun(".", GetInfo, GetBin, Acc)}; + {archive, ArchiveBin} -> + zip:foldl(Fun, Acc, {File, ArchiveBin}) + end; + {error, Reason} -> + {error, Reason} + end. + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + run(Dir, Cmd0, Expected0) -> Expected = iolist_to_binary(expected_output(Expected0, Dir)), Cmd = case os:type() of @@ -490,7 +744,7 @@ run(Dir, Cmd0, Expected0) -> end, do_run(Dir, Cmd, Expected). -run(Dir, Opts, Cmd0, Expected) -> +run_with_opts(Dir, Opts, Cmd0, Expected) -> Cmd = case os:type() of {win32,_} -> "escript " ++ Opts ++ " " ++ filename:nativename(Dir) ++ "\\" ++ Cmd0; _ -> "escript " ++ Opts ++ " " ++ Dir ++ "/" ++ Cmd0 @@ -533,8 +787,8 @@ expected_output([data_dir|T], Data) -> [filename:nativename(Data)++Slash|expected_output(T, Data)]; expected_output([H|T], Data) -> [H|expected_output(T, Data)]; -expected_output([], _) -> +expected_output([], _) -> []; -expected_output(Bin, _) when is_binary(Bin) -> +expected_output(Bin, _) when is_binary(Bin) -> Bin. -- cgit v1.2.3 From e774e560dfcb01f4ff16d6f4e64b1c1ed75de5d9 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?H=C3=A5kan=20Mattsson?= Date: Fri, 5 Mar 2010 17:48:27 +0100 Subject: Remove the undocumented function escript:foldl/3 It is possible to obtain the same effect with the functions escript:extract/2 and zip:fold/3. See escript_SUITE:escript_foldl/3 for a complete emulation of the old escript:foldl/3 function. --- lib/stdlib/src/escript.erl | 70 ---------------------------------------------- 1 file changed, 70 deletions(-) (limited to 'lib/stdlib') diff --git a/lib/stdlib/src/escript.erl b/lib/stdlib/src/escript.erl index bf32e15209..d26443f277 100644 --- a/lib/stdlib/src/escript.erl +++ b/lib/stdlib/src/escript.erl @@ -20,7 +20,6 @@ %% Useful functions that can be called from scripts. -export([script_name/0, create/2, extract/2]). --export([foldl/3]). % Undocumented function that will be removed %% Internal API. -export([start/0, start/1]). @@ -244,75 +243,6 @@ script_name() -> [ScriptName|_] = init:get_plain_arguments(), ScriptName. -%% Apply Fun(Name, GetInfo, GetBin, Acc) for each file in the escript. -%% -%% Fun/2 must return a new accumulator which is passed to the next call. -%% The function returns the final value of the accumulator. Acc0 is -%% returned if the escript contain an empty archive. -%% -%% GetInfo/0 is a fun that returns a #file_info{} record for the file. -%% GetBin/0 is a fun that returns a the contents of the file as a binary. -%% -%% An escript may contain erlang code, beam code or an archive: -%% -%% archive - the Fun/4 will be applied for each file in the archive -%% beam - the Fun/4 will be applied once and GetInfo/0 returns the file -%% info for the (entire) escript file -%% erl - the Fun/4 will be applied once, GetInfo/0 returns the file -%% info for the (entire) escript file and the GetBin returns -%% the compiled beam code - --spec foldl(fun((string(), - fun(() -> #file_info{}), - fun(() -> binary()), - term()) -> term()), - term(), - string()) -> {ok, term()} | {error, term()}. -foldl(Fun, Acc0, File) when is_function(Fun, 4) -> - case parse_file(File, false) of - {text, _, Forms, _HasRecs, _Mode} when is_list(Forms) -> - GetInfo = fun() -> {ok, FI} = file:read_file_info(File), FI end, - GetBin = - fun() -> - case compile:forms(Forms, [return_errors, debug_info]) of - {ok, _, BeamBin} -> - BeamBin; - {error, _Errors, _Warnings} -> - throw("There were compilation errors.") - end - end, - try - {ok, Fun(".", GetInfo, GetBin, Acc0)} - catch - throw:Reason -> - {error, Reason} - end; - {beam, _, BeamBin, _HasRecs, _Mode} when is_binary(BeamBin) -> - GetInfo = fun() -> {ok, FI} = file:read_file_info(File), FI end, - GetBin = fun() -> BeamBin end, - try - {ok, Fun(".", GetInfo, GetBin, Acc0)} - catch - throw:Reason -> - {error, Reason} - end; - {archive, _, ArchiveBin, _HasRecs, _Mode} when is_binary(ArchiveBin) -> - ZipFun = - fun({Name, GetInfo, GetBin}, A) -> - A2 = Fun(Name, GetInfo, GetBin, A), - {true, false, A2} - end, - case prim_zip:open(ZipFun, Acc0, {File, ArchiveBin}) of - {ok, PrimZip, Res} -> - ok = prim_zip:close(PrimZip), - {ok, Res}; - {error, bad_eocd} -> - {error, "Not an archive file"}; - {error, Reason} -> - {error, Reason} - end - end. - %% %% Internal API. %% -- cgit v1.2.3