%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2006-2009. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%%
-module(zip_SUITE).
-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]).
-include("test_server.hrl").
-include("test_server_line.hrl").
-include_lib("kernel/include/file.hrl").
-include_lib("stdlib/include/zip.hrl").
all(suite) -> [borderline, atomic, bad_zip,
unzip_from_binary, unzip_to_binary,
zip_to_binary,
unzip_options, zip_options, list_dir_options, aliases,
openzip_api, zip_api, unzip_jar,
compress_control].
borderline(doc) ->
["Test creating, listing and extracting one file from an archive "
"multiple times with different file sizes. Also check that the "
"modification date of the extracted file has survived."];
borderline(Config) when is_list(Config) ->
RootDir = ?config(priv_dir, Config),
TempDir = filename:join(RootDir, "borderline"),
ok = file:make_dir(TempDir),
Record = 512,
Block = 20 * Record,
lists:foreach(fun(Size) -> borderline_test(Size, TempDir) end,
[0, 1, 10, 13, 127, 333, Record-1, Record, Record+1,
Block-Record-1, Block-Record, Block-Record+1,
Block-1, Block, Block+1,
Block+Record-1, Block+Record, Block+Record+1]),
%% Clean up.
delete_files([TempDir]),
ok.
borderline_test(Size, TempDir) ->
Archive = filename:join(TempDir, "ar_"++integer_to_list(Size)++".zip"),
Name = filename:join(TempDir, "file_"++integer_to_list(Size)),
io:format("Testing size ~p", [Size]),
%% Create a file and archive it.
{_, _, X0} = erlang:now(),
file:write_file(Name, random_byte_list(X0, Size)),
{ok, Archive} = zip:zip(Archive, [Name]),
ok = file:delete(Name),
%% Verify listing and extracting.
{ok, [#zip_comment{comment = []},
#zip_file{name = Name,
info = Info,
offset = 0,
comp_size = _}]} = zip:list_dir(Archive),
Size = Info#file_info.size,
{ok, [Name]} = zip:extract(Archive, [verbose]),
%% Verify contents of extracted file.
{ok, Bin} = file:read_file(Name),
true = match_byte_list(X0, binary_to_list(Bin)),
%% Verify that Unix zip can read it. (if we have a unix zip that is!)
unzip_list(Archive, Name),
ok.
unzip_list(Archive, Name) ->
case os:find_executable("unzip") of
Unzip when is_list(Unzip) ->
unzip_list1(Archive, Name);
_ ->
ok
end.
unzip_list1(Archive, Name) ->
Expect = Name ++ "\n",
cmd_expect("unzip -Z -1 " ++ Archive, Expect).
cmd_expect(Cmd, Expect) ->
Port = open_port({spawn, make_cmd(Cmd)}, [stream, in, eof]),
get_data(Port, Expect).
get_data(Port, Expect) ->
receive
{Port, {data, Bytes}} ->
get_data(Port, match_output(Bytes, Expect, Port));
{Port, eof} ->
Port ! {self(), close},
receive
{Port, closed} ->
true
end,
receive
{'EXIT', Port, _} ->
ok
after 1 -> % force context switch
ok
end,
match_output(eof, Expect, Port)
end.
match_output([C|Output], [C|Expect], Port) ->
match_output(Output, Expect, Port);
match_output([_|_], [_|_], Port) ->
kill_port_and_fail(Port, badmatch);
match_output([X|Output], [], Port) ->
kill_port_and_fail(Port, {too_much_data, [X|Output]});
match_output([], Expect, _Port) ->
Expect;
match_output(eof, [], _Port) ->
[];
match_output(eof, Expect, Port) ->
kill_port_and_fail(Port, {unexpected_end_of_input, Expect}).
kill_port_and_fail(Port, Reason) ->
unlink(Port),
exit(Port, die),
test_server:fail(Reason).
make_cmd(Cmd) ->
Cmd.
%% case os:type() of
%% {win32, _} -> lists:concat(["cmd /c", Cmd]);
%% {unix, _} -> lists:concat(["sh -c '", Cmd, "'"])
%% end.
%% Verifies a random byte list.
match_byte_list(X0, [Byte|Rest]) ->
X = next_random(X0),
case (X bsr 26) band 16#ff of
Byte -> match_byte_list(X, Rest);
_ -> false
end;
match_byte_list(_, []) ->
true.
%% Generates a random byte list.
random_byte_list(X0, Count) ->
random_byte_list(X0, Count, []).
random_byte_list(X0, Count, Result) when Count > 0->
X = next_random(X0),
random_byte_list(X, Count-1, [(X bsr 26) band 16#ff|Result]);
random_byte_list(_X, 0, Result) ->
lists:reverse(Result).
%% This RNG is from line 21 on page 102 in Knuth: The Art of Computer Programming,
%% Volume II, Seminumerical Algorithms.
next_random(X) ->
(X*17059465+1) band 16#fffffffff.
atomic(doc) ->
["Test the 'atomic' operations: zip/unzip/list_dir, on archives."
"Also test the 'cooked' option."];
atomic(suite) -> [];
atomic(Config) when is_list(Config) ->
ok = file:set_cwd(?config(priv_dir, Config)),
DataFiles = data_files(),
Names = [Name || {Name,_,_} <- DataFiles],
io:format("Names: ~p", [Names]),
%% Create a zip archive.
Zip2 = "zip.zip",
{ok, Zip2} = zip:zip(Zip2, Names, []),
Names = names_from_list_dir(zip:list_dir(Zip2)),
%% Same test again, but this time created with 'cooked'
Zip3 = "cooked.zip",
{ok, Zip3} = zip:zip(Zip3, Names, [cooked]),
Names = names_from_list_dir(zip:list_dir(Zip3)),
Names = names_from_list_dir(zip:list_dir(Zip3, [cooked])),
%% Clean up.
delete_files([Zip2,Zip3|Names]),
ok.
openzip_api(doc) ->
["Test the openzip_open/2, openzip_get/1, openzip_get/2, openzip_close/1 "
"and openzip_list_dir/1 functions."];
openzip_api(suite) -> [];
openzip_api(Config) when is_list(Config) ->
ok = file:set_cwd(?config(priv_dir, Config)),
DataFiles = data_files(),
Names = [Name || {Name, _, _} <- DataFiles],
io:format("Names: ~p", [Names]),
%% Create a zip archive
Zip = "zip.zip",
{ok, Zip} = zip:zip(Zip, Names, []),
%% Open archive
{ok, OpenZip} = zip:openzip_open(Zip, [memory]),
%% List dir
Names = names_from_list_dir(zip:openzip_list_dir(OpenZip)),
%% Get a file
Name1 = hd(Names),
{ok, Data1} = file:read_file(Name1),
{ok, {Name1, Data1}} = zip:openzip_get(Name1, OpenZip),
%% Get all files
FilesDatas = lists:map(fun(Name) -> {ok, B} = file:read_file(Name),
{Name, B} end, Names),
{ok, FilesDatas} = zip:openzip_get(OpenZip),
%% Close
ok = zip:openzip_close(OpenZip),
%% Clean up.
delete_files([Names]),
ok.
zip_api(doc) ->
["Test the zip_open/2, zip_get/1, zip_get/2, zip_close/1 "
"and zip_list_dir/1 functions."];
zip_api(suite) -> [];
zip_api(Config) when is_list(Config) ->
ok = file:set_cwd(?config(priv_dir, Config)),
DataFiles = data_files(),
Names = [Name || {Name, _, _} <- DataFiles],
io:format("Names: ~p", [Names]),
%% Create a zip archive
Zip = "zip.zip",
{ok, Zip} = zip:zip(Zip, Names, []),
%% Open archive
{ok, ZipSrv} = zip:zip_open(Zip, [memory]),
%% List dir
Names = names_from_list_dir(zip:zip_list_dir(ZipSrv)),
%% Get a file
Name1 = hd(Names),
{ok, Data1} = file:read_file(Name1),
{ok, {Name1, Data1}} = zip:zip_get(Name1, ZipSrv),
%% Get all files
FilesDatas = lists:map(fun(Name) -> {ok, B} = file:read_file(Name),
{Name, B} end, Names),
{ok, FilesDatas} = zip:zip_get(ZipSrv),
%% Close
ok = zip:zip_close(ZipSrv),
%% Clean up.
delete_files([Names]),
ok.
unzip_options(doc) ->
["Test options for unzip, only cwd and file_list currently"];
unzip_options(suite) ->
[];
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),
FList = ["quotes/rain.txt","wikipedia.txt"],
%% Unzip a zip file in Subdir
?line {ok, RetList} = zip:unzip(Long, [{cwd, Subdir},
{file_list, FList}]),
%% Verify.
?line true = (length(FList) =:= length(RetList)),
?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,
RetList),
%% Clean up and verify no more files.
?line 0 = delete_files([Subdir]),
ok.
unzip_jar(doc) ->
["Test unzip a jar file (OTP-7382)"];
unzip_jar(suite) ->
[];
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),
ok = file:set_cwd(Subdir),
FList = ["META-INF/MANIFEST.MF","test.txt"],
{ok, RetList} = zip:unzip(JarFile),
%% Verify.
?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,
RetList),
%% Clean up and verify no more files.
?line 0 = delete_files([Subdir]),
ok.
zip_options(doc) ->
["Test the options for unzip, only cwd currently"];
zip_options(suite) ->
[];
zip_options(Config) when is_list(Config) ->
PrivDir = ?config(priv_dir, Config),
ok = file:set_cwd(PrivDir),
DataFiles = data_files(),
Names = [Name || {Name, _, _} <- DataFiles],
%% Make sure cwd is not where we get the files
ok = file:set_cwd(?config(data_dir, Config)),
%% Create a zip archive
{ok, Zip} = zip:zip("filename_not_used.zip", Names, [memory, {cwd, PrivDir}]),
%% Open archive
{ok, ZipSrv} = zip:zip_open(Zip, [memory]),
%% List dir
Names = names_from_list_dir(zip:zip_list_dir(ZipSrv)),
%% Get a file
Name1 = hd(Names),
{ok, Data1} = file:read_file(filename:join(PrivDir, Name1)),
{ok, {Name1, Data1}} = zip:zip_get(Name1, ZipSrv),
%% Get all files
FilesDatas = lists:map(fun(Name) -> {ok, B} = file:read_file(filename:join(PrivDir, Name)),
{Name, B} end, Names),
{ok, FilesDatas} = zip:zip_get(ZipSrv),
%% Close
ok = zip:zip_close(ZipSrv),
%% Clean up.
delete_files([Names]),
ok.
list_dir_options(doc) ->
["Test the options for list_dir... one day"];
list_dir_options(suite) ->
[];
list_dir_options(Config) when is_list(Config) ->
ok.
%% convert zip_info as returned from list_dir to a list of names
names_from_list_dir({ok, Info}) ->
names_from_list_dir(Info);
names_from_list_dir(Info) ->
tl(lists:map(fun(#zip_file{name = Name}) -> Name;
(_) -> ok end, Info)).
%% Returns a sequence of characters.
char_seq(N, First) ->
char_seq(N, First, []).
char_seq(0, _, Result) ->
Result;
char_seq(N, C, Result) when C < 127 ->
char_seq(N-1, C+1, [C|Result]);
char_seq(N, _, Result) ->
char_seq(N, $!, Result).
data_files() ->
Files = [{"first_file", 1555, $a},
{"small_file", 7, $d},
{"big_file", 23875, $e},
{"last_file", 7500, $g}],
create_files(Files),
Files.
create_files([{Name, dir, _First}|Rest]) ->
ok = file:make_dir(Name),
create_files(Rest);
create_files([{Name, Size, First}|Rest]) when is_integer(Size) ->
ok = file:write_file(Name, char_seq(Size, First)),
create_files(Rest);
create_files([]) ->
ok.
%% make_dirs([Dir|Rest], []) ->
%% ok = file:make_dir(Dir),
%% make_dirs(Rest, Dir);
%% make_dirs([Dir|Rest], Parent) ->
%% Name = filename:join(Parent, Dir),
%% ok = file:make_dir(Name),
%% make_dirs(Rest, Name);
%% make_dirs([], Dir) ->
%% Dir.
bad_zip(doc) ->
["Try zip:unzip/1 on some corrupted zip files."];
bad_zip(Config) when is_list(Config) ->
ok = file:set_cwd(?config(priv_dir, Config)),
try_bad("bad_crc", {bad_crc, "abc.txt"}, Config),
try_bad("bad_central_directory", bad_central_directory, Config),
try_bad("bad_file_header", bad_file_header, Config),
try_bad("bad_eocd", bad_eocd, Config),
try_bad("enoent", enoent, Config),
GetNotFound = fun(A) ->
{ok, O} = zip:openzip_open(A, []),
zip:openzip_get("not_here", O)
end,
try_bad("abc", file_not_found, GetNotFound, Config),
ok.
try_bad(N, R, Config) ->
try_bad(N, R, fun(A) -> io:format("name : ~p\n", [A]),
zip:unzip(A, [verbose]) end, Config).
try_bad(Name0, Reason, What, Config) ->
%% Intentionally no macros here.
DataDir = ?config(data_dir, Config),
Name = Name0 ++ ".zip",
io:format("~nTrying ~s", [Name]),
Full = filename:join(DataDir, Name),
Expected = {error, Reason},
case What(Full) of
Expected ->
io:format("Result: ~p\n", [Expected]);
Other ->
io:format("unzip/2 returned ~p (expected ~p)\n", [Other, Expected]),
test_server:fail({bad_return_value, Other})
end.
unzip_to_binary(doc) ->
["Test extracting to binary with memory option."];
unzip_to_binary(Config) when is_list(Config) ->
DataDir = ?config(data_dir, Config),
PrivDir = ?config(priv_dir, Config),
delete_all_in(PrivDir),
file:set_cwd(PrivDir),
Long = filename:join(DataDir, "abc.zip"),
%% Unzip a zip file into a binary
{ok, FBList} = zip:unzip(Long, [memory]),
%% Verify.
lists:foreach(fun({F,B}) -> {ok,B}=file:read_file(filename:join(DataDir, F))
end, FBList),
%% Make sure no files created in cwd
{ok,[]} = file:list_dir(PrivDir),
ok.
zip_to_binary(doc) ->
["Test compressing to binary with memory option."];
zip_to_binary(Config) when is_list(Config) ->
DataDir = ?config(data_dir, Config),
PrivDir = ?config(priv_dir, Config),
delete_all_in(PrivDir),
file:set_cwd(PrivDir),
FileName = "abc.txt",
ZipName = "t.zip",
FilePath = filename:join(DataDir, FileName),
{ok, _Size} = file:copy(FilePath, FileName),
%% Zip to a binary archive
{ok, {ZipName, ZipB}} = zip:zip(ZipName, [FileName], [memory]),
%% Make sure no files created in cwd
{ok,[FileName]} = file:list_dir(PrivDir),
%% Zip to a file
{ok, ZipName} = zip:zip(ZipName, [FileName]),
%% Verify.
{ok, ZipB} = file:read_file(ZipName),
{ok, FData} = file:read_file(FileName),
{ok, [{FileName, FData}]} = zip:unzip(ZipB, [memory]),
%% Clean up.
delete_files([FileName, ZipName]),
ok.
aliases(doc) ->
["Test using the aliases, extract/2, table/2 and create/3"];
aliases(Config) when is_list(Config) ->
{_, _, X0} = erlang:now(),
Size = 100,
B = list_to_binary(random_byte_list(X0, Size)),
%% create
{ok, {"z.zip", ZArchive}} = zip:create("z.zip", [{"b", B}], [memory]),
%% extract
{ok, [{"b", B}]} = zip:extract(ZArchive, [memory]),
%% table
{ok, [#zip_comment{comment = _}, #zip_file{name = "b",
info = FI,
comp_size = _,
offset = 0}]} =
zip:table(ZArchive),
Size = FI#file_info.size,
ok.
unzip_from_binary(doc) ->
["Test extracting a zip archive from a binary."];
unzip_from_binary(Config) when is_list(Config) ->
DataDir = ?config(data_dir, Config),
PrivDir = ?config(priv_dir, Config),
ExtractDir = filename:join(PrivDir, "extract_from_binary"),
ok = file:make_dir(ExtractDir),
Archive = filename:join(ExtractDir, "abc.zip"),
{ok, _Size} = file:copy(filename:join(DataDir, "abc.zip"), Archive),
FileName = "abc.txt",
Quote = "quotes/rain.txt",
Wikipedia = "wikipedia.txt",
EmptyFile = "emptyFile",
file:set_cwd(ExtractDir),
%% Read a zip file into a binary and extract from the binary.
{ok, Bin} = file:read_file(Archive),
{ok, [FileName,Quote,Wikipedia,EmptyFile]} = zip:unzip(Bin),
%% Verify.
DestFilename = filename:join(ExtractDir, "abc.txt"),
{ok, Data} = file:read_file(filename:join(DataDir, FileName)),
{ok, Data} = file:read_file(DestFilename),
DestQuote = filename:join([ExtractDir, "quotes", "rain.txt"]),
{ok, QuoteData} = file:read_file(filename:join(DataDir, Quote)),
{ok, QuoteData} = file:read_file(DestQuote),
%% Clean up.
delete_files([DestFilename, DestQuote, Archive, ExtractDir]),
ok.
%% oac_files() ->
%% Files = [{"oac_file", 1459, $x},
%% {"oac_small", 99, $w},
%% {"oac_big", 33896, $A}],
%% create_files(Files),
%% Files.
%% Delete the given list of files and directories.
%% Return total number of deleted files (not directories)
delete_files(List) ->
do_delete_files(List, 0).
do_delete_files([],Cnt) ->
Cnt;
do_delete_files([Item|Rest], Cnt) ->
case file:delete(Item) of
ok ->
DelCnt = 1;
{error,eperm} ->
file:change_mode(Item, 8#777),
DelCnt = delete_files(filelib:wildcard(filename:join(Item, "*"))),
file:del_dir(Item);
{error,eacces} ->
%% We'll see about that!
file:change_mode(Item, 8#777),
case file:delete(Item) of
ok ->
DelCnt = 1;
{error,_} ->
erlang:yield(),
file:change_mode(Item, 8#777),
file:delete(Item),
DelCnt = 1
end;
{error,_} ->
DelCnt = 0
end,
do_delete_files(Rest, Cnt + DelCnt).
delete_all_in(Dir) ->
{ok, Files} = file:list_dir(Dir),
delete_files(lists:map(fun(F) -> filename:join(Dir,F) end,
Files)).
compress_control(doc) ->
["Test control of which files that should be compressed"];
compress_control(suite) -> [];
compress_control(Config) when is_list(Config) ->
ok = file:set_cwd(?config(priv_dir, Config)),
Dir = "compress_control",
Files = [
{Dir, dir, $d},
{filename:join([Dir, "first_file.txt"]), 10000, $f},
{filename:join([Dir, "a_dir"]), dir, $d},
{filename:join([Dir, "a_dir", "zzz.zip"]), 10000, $z},
{filename:join([Dir, "a_dir", "lll.lzh"]), 10000, $l},
{filename:join([Dir, "a_dir", "eee.exe"]), 10000, $e},
{filename:join([Dir, "a_dir", "ggg.arj"]), 10000, $g},
{filename:join([Dir, "a_dir", "b_dir"]), dir, $d},
{filename:join([Dir, "a_dir", "b_dir", "ggg.arj"]), 10000, $a},
{filename:join([Dir, "last_file.txt"]), 10000, $l}
],
test_compress_control(Dir,
Files,
[{compress, []}],
[]),
test_compress_control(Dir,
Files,
[{uncompress, all}],
[]),
test_compress_control(Dir,
Files,
[{uncompress, []}],
[".txt", ".exe", ".zip", ".lzh", ".arj"]),
test_compress_control(Dir,
Files,
[],
[".txt", ".exe"]),
test_compress_control(Dir,
Files,
[{uncompress, {add, [".exe"]}},
{uncompress, {del, [".zip", "arj"]}}],
[".txt", ".zip", "arj"]),
test_compress_control(Dir,
Files,
[{uncompress, []},
{uncompress, {add, [".exe"]}},
{uncompress, {del, [".zip", "arj"]}}],
[".txt", ".zip", ".lzh", ".arj"]),
ok.
test_compress_control(Dir, Files, ZipOptions, Expected) ->
%% Cleanup
Zip = "zip.zip",
Names = [N || {N, _, _} <- Files],
delete_files([Zip]),
delete_files(lists:reverse(Names)),
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]),
verify_compression(Files, ZipList, OpenZip, ZipOptions, Expected),
ok = zip:openzip_close(OpenZip),
%% Cleanup
delete_files([Zip]),
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 ->
{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),
case {Name, Kind, InfoType, IsComp, ExpComp, BinSz, InfoSz, InfoCompSz} of
{_, dir, directory, false, _, Sz, Sz, Sz} when Sz =:= BinSz -> ok;
{_, Sz, regular, false, false, Sz, Sz, Sz} when Sz =:= BinSz -> ok;
{_, Sz, regular, true, true, Sz, Sz, OtherSz} when Sz =:= BinSz, OtherSz =/= BinSz -> ok
end,
verify_compression(Files, ZipList -- [ZipFile], OpenZip, ZipOptions, Expected);
verify_compression([], [], _OpenZip, _ZipOptions, _Expected) ->
ok.
is_compressed(_Ext, dir, _Options) ->
false;
is_compressed(Ext, _Sz, Options) ->
CompressOpt =
case [What || {compress, What} <- Options] of
[] -> all;
CompressOpts-> extensions(CompressOpts, all)
end,
DoCompress = (CompressOpt =:= all) orelse lists:member(Ext, CompressOpt),
Default = [".Z", ".zip", ".zoo", ".arc", ".lzh", ".arj"],
UncompressOpt =
case [What || {uncompress, What} <- Options] of
[] -> Default;
UncompressOpts-> extensions(UncompressOpts, Default)
end,
DoUncompress = (UncompressOpt =:= all) orelse lists:member(Ext, UncompressOpt),
DoCompress andalso not DoUncompress.
extensions([H | T], Old) ->
case H of
all ->
extensions(T, H);
H when is_list(H) ->
extensions(T, H);
{add, New} when is_list(New), is_list(Old) ->
extensions(T, Old ++ New);
{del, New} when is_list(New), is_list(Old) ->
extensions(T, Old -- New);
_ ->
extensions(T, Old)
end;
extensions([], Old) ->
Old.
