File 2369-Add-options-for-creating-reproducible-tars... of Package erlang

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File 2369-Add-options-for-creating-reproducible-tars.patch of Package erlang (Revision b1dff5cbf87755f120bfe931af793e05)

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From bd3dc9ac24d76bbdc8ce973a739fd52b5caa63ff Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Eric=20Meadows-J=C3=B6nsson?=
 <eric.meadows.jonsson@gmail.com>
Date: Wed, 25 Oct 2017 21:12:21 +0200
Subject: [PATCH 2/2] Add options for creating reproducible tars

---
 lib/stdlib/doc/src/erl_tar.xml | 41 +++++++++++++++++++++++-
 lib/stdlib/src/erl_tar.erl     | 72 ++++++++++++++++++++++++++++++++----------
 lib/stdlib/src/erl_tar.hrl     | 16 ++++++++--
 lib/stdlib/test/tar_SUITE.erl  | 30 ++++++++++++++++--
 4 files changed, 137 insertions(+), 22 deletions(-)

diff --git a/lib/stdlib/doc/src/erl_tar.xml b/lib/stdlib/doc/src/erl_tar.xml
index 337028568a..caf8f4a96d 100644
--- a/lib/stdlib/doc/src/erl_tar.xml
+++ b/lib/stdlib/doc/src/erl_tar.xml
@@ -4,7 +4,7 @@
 <erlref>
 <header>
 <copyright>
- <year>2003</year><year>2016</year>
+ <year>2003</year><year>2018</year>
 <holder>Ericsson AB. All Rights Reserved.</holder>
 </copyright>
 <legalnotice>
@@ -136,6 +136,9 @@
 <v>Filename = filename()|{NameInArchive,FilenameOrBin}</v>
 <v>Options = [Option]</v>
 <v>Option = dereference|verbose|{chunks,ChunkSize}</v>
+ <v>|{atime,non_neg_integer()}|{mtime,non_neg_integer()}</v>
+ <v>|{ctime,non_neg_integer()}|{uid,non_neg_integer()}</v>
+ <v>|{gid,non_neg_integer()}</v>
 <v>ChunkSize = positive_integer()</v>
 <v>RetValue = ok|{error,{Filename,Reason}}</v>
 <v>Reason = term()</v>
@@ -167,6 +170,42 @@
 <seealso marker="ssh:ssh_sftp#open_tar/3">
 <c>ssh_sftp:open_tar/3</c></seealso>.
 </item>
+ <tag><c>{atime,non_neg_integer()}</c></tag>
+ <item>
+ Sets the last time, as
+	 <seealso marker="erts:time_correction#POSIX_Time">
+ POSIX time</seealso>, when the file was read. See also
+ <seealso marker="kernel:file#read_file_info/1">
+ <c>file:read_file_info/1</c></seealso>.
+ </item>
+ <tag><c>{mtime,non_neg_integer()}</c></tag>
+ <item>
+ Sets the last time, as
+	 <seealso marker="erts:time_correction#POSIX_Time">
+ POSIX time</seealso>, when the file was written. See also
+ <seealso marker="kernel:file#read_file_info/1">
+ <c>file:read_file_info/1</c></seealso>.
+ </item>
+ <tag><c>{ctime,non_neg_integer()}</c></tag>
+ <item>
+ Sets the time, as
+	 <seealso marker="erts:time_correction#POSIX_Time">
+ POSIX time</seealso>, when the file was created. See also
+ <seealso marker="kernel:file#read_file_info/1">
+ <c>file:read_file_info/1</c></seealso>.
+ </item>
+ <tag><c>{uid,non_neg_integer()}</c></tag>
+ <item>
+ Sets the file owner.
+ <seealso marker="kernel:file#read_file_info/1">
+ <c>file:read_file_info/1</c></seealso>.
+ </item>
+ <tag><c>{gid,non_neg_integer()}</c></tag>
+ <item>
+ Sets the group that the file owner belongs to.
+ <seealso marker="kernel:file#read_file_info/1">
+ <c>file:read_file_info/1</c></seealso>.
+ </item>
 </taglist>
 </desc>
 </func>
diff --git a/lib/stdlib/src/erl_tar.erl b/lib/stdlib/src/erl_tar.erl
index 48bbd38f9b..b04cdb3609 100644
--- a/lib/stdlib/src/erl_tar.erl
+++ b/lib/stdlib/src/erl_tar.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1997-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -457,26 +457,61 @@ add(Reader, NameOrBin, NameInArchive, Options)
 
 do_add(#reader{access=write}=Reader, Name, NameInArchive, Options)
 when is_list(NameInArchive), is_list(Options) ->
- RF = fun(F) -> file:read_link_info(F, [{time, posix}]) end,
+ RF = apply_file_info_opts_fun(Options, read_link_info),
 Opts = #add_opts{read_info=RF},
- add1(Reader, Name, NameInArchive, add_opts(Options, Opts));
+ add1(Reader, Name, NameInArchive, add_opts(Options, Options, Opts));
 do_add(#reader{access=read},_,_,_) ->
 {error, eacces};
 do_add(Reader,_,_,_) ->
 {error, {badarg, Reader}}.
 
-add_opts([dereference|T], Opts) ->
- RF = fun(F) -> file:read_file_info(F, [{time, posix}]) end,
- add_opts(T, Opts#add_opts{read_info=RF});
-add_opts([verbose|T], Opts) ->
- add_opts(T, Opts#add_opts{verbose=true});
-add_opts([{chunks,N}|T], Opts) ->
- add_opts(T, Opts#add_opts{chunk_size=N});
-add_opts([_|T], Opts) ->
- add_opts(T, Opts);
-add_opts([], Opts) ->
+add_opts([dereference|T], AllOptions, Opts) ->
+ RF = apply_file_info_opts_fun(AllOptions, read_file_info),
+ add_opts(T, AllOptions, Opts#add_opts{read_info=RF});
+add_opts([verbose|T], AllOptions, Opts) ->
+ add_opts(T, AllOptions, Opts#add_opts{verbose=true});
+add_opts([{chunks,N}|T], AllOptions, Opts) ->
+ add_opts(T, AllOptions, Opts#add_opts{chunk_size=N});
+add_opts([{atime,Value}|T], AllOptions, Opts) ->
+ add_opts(T, AllOptions, Opts#add_opts{atime=Value});
+add_opts([{mtime,Value}|T], AllOptions, Opts) ->
+ add_opts(T, AllOptions, Opts#add_opts{mtime=Value});
+add_opts([{ctime,Value}|T], AllOptions, Opts) ->
+ add_opts(T, AllOptions, Opts#add_opts{ctime=Value});
+add_opts([{uid,Value}|T], AllOptions, Opts) ->
+ add_opts(T, AllOptions, Opts#add_opts{uid=Value});
+add_opts([{gid,Value}|T], AllOptions, Opts) ->
+ add_opts(T, AllOptions, Opts#add_opts{gid=Value});
+add_opts([_|T], AllOptions, Opts) ->
+ add_opts(T, AllOptions, Opts);
+add_opts([], _AllOptions, Opts) ->
 Opts.
 
+apply_file_info_opts(Opts, {ok, FileInfo}) ->
+ {ok, do_apply_file_info_opts(Opts, FileInfo)};
+apply_file_info_opts(_Opts, Other) ->
+ Other.
+
+do_apply_file_info_opts([{atime,Value}|T], FileInfo) ->
+ do_apply_file_info_opts(T, FileInfo#file_info{atime=Value});
+do_apply_file_info_opts([{mtime,Value}|T], FileInfo) ->
+ do_apply_file_info_opts(T, FileInfo#file_info{mtime=Value});
+do_apply_file_info_opts([{ctime,Value}|T], FileInfo) ->
+ do_apply_file_info_opts(T, FileInfo#file_info{ctime=Value});
+do_apply_file_info_opts([{uid,Value}|T], FileInfo) ->
+ do_apply_file_info_opts(T, FileInfo#file_info{uid=Value});
+do_apply_file_info_opts([{gid,Value}|T], FileInfo) ->
+ do_apply_file_info_opts(T, FileInfo#file_info{gid=Value});
+do_apply_file_info_opts([_|T], FileInfo) ->
+ do_apply_file_info_opts(T, FileInfo);
+do_apply_file_info_opts([], FileInfo) ->
+ FileInfo.
+
+apply_file_info_opts_fun(Options, InfoFunction) ->
+ fun(F) ->
+ apply_file_info_opts(Options, file:InfoFunction(F, [{time, posix}]))
+ end.
+
 add1(#reader{}=Reader, Name, NameInArchive, #add_opts{read_info=ReadInfo}=Opts)
 when is_list(Name) ->
 Res = case ReadInfo(Name) of
@@ -515,9 +550,11 @@ add1(Reader, Bin, NameInArchive, Opts) when is_binary(Bin) ->
 name = NameInArchive,
 size = byte_size(Bin),
 typeflag = ?TYPE_REGULAR,
- atime = Now,
- mtime = Now,
- ctime = Now,
+ atime = add_opts_time(Opts#add_opts.atime, Now),
+ mtime = add_opts_time(Opts#add_opts.mtime, Now),
+ ctime = add_opts_time(Opts#add_opts.ctime, Now),
+ uid = Opts#add_opts.uid,
+ gid = Opts#add_opts.gid,
 mode = 8#100644},
 {ok, Reader2} = add_header(Reader, Header, Opts),
 Padding = skip_padding(byte_size(Bin)),
@@ -527,6 +564,9 @@ add1(Reader, Bin, NameInArchive, Opts) when is_binary(Bin) ->
 {error, Reason} -> {error, {NameInArchive, Reason}}
 end.
 
+add_opts_time(undefined, Now) -> Now;
+add_opts_time(Time, _Now) -> Time.
+
 add_directory(Reader, DirName, NameInArchive, Info, Opts) ->
 case file:list_dir(DirName) of
 {ok, []} ->
diff --git a/lib/stdlib/src/erl_tar.hrl b/lib/stdlib/src/erl_tar.hrl
index cff0c2f500..5d6cecbb66 100644
--- a/lib/stdlib/src/erl_tar.hrl
+++ b/lib/stdlib/src/erl_tar.hrl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2017. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -21,7 +21,12 @@
 -record(add_opts, {
 	 read_info, %% Fun to use for read file/link info.
 	 chunk_size = 0, %% For file reading when sending to sftp. 0=do not chunk
- verbose = false}). %% Verbose on/off.
+ verbose = false, %% Verbose on/off.
+ atime = undefined,
+ mtime = undefined,
+ ctime = undefined,
+ uid = 0,
+ gid = 0}).
 -type add_opts() :: #add_opts{}.
 
 %% Options used when reading a tar archive.
@@ -36,7 +41,12 @@
 
 -type add_opt() :: dereference |
 verbose |
- {chunks, pos_integer()}.
+ {chunks, pos_integer()} |
+ {atime, non_neg_integer()} |
+ {mtime, non_neg_integer()} |
+ {ctime, non_neg_integer()} |
+ {uid, non_neg_integer()} |
+ {gid, non_neg_integer()}.
 
 -type extract_opt() :: {cwd, string()} |
 {files, [string()]} |
diff --git a/lib/stdlib/test/tar_SUITE.erl b/lib/stdlib/test/tar_SUITE.erl
index 4061008812..32a33283d1 100644
--- a/lib/stdlib/test/tar_SUITE.erl
+++ b/lib/stdlib/test/tar_SUITE.erl
@@ -28,7 +28,7 @@
 	 extract_from_open_file/1, symlinks/1, open_add_close/1, cooked_compressed/1,
 	 memory/1,unicode/1,read_other_implementations/1,
 sparse/1, init/1, leading_slash/1, dotdot/1,
- roundtrip_metadata/1]).
+ roundtrip_metadata/1, apply_file_info_opts/1]).
 
 -include_lib("common_test/include/ct.hrl").
 -include_lib("kernel/include/file.hrl").
@@ -42,7 +42,8 @@ all() ->
 extract_filtered,
 symlinks, open_add_close, cooked_compressed, memory, unicode,
 read_other_implementations,
- sparse,init,leading_slash,dotdot,roundtrip_metadata].
+ sparse,init,leading_slash,dotdot,roundtrip_metadata,
+ apply_file_info_opts].
 
 groups() -> 
 [].
@@ -989,6 +990,31 @@ do_roundtrip_metadata(Dir, File) ->
 ok
 end.
 
+apply_file_info_opts(Config) when is_list(Config) ->
+ ok = file:set_cwd(proplists:get_value(priv_dir, Config)),
+
+ ok = file:make_dir("empty_directory"),
+ ok = file:write_file("file", "contents"),
+
+ Opts = [{atime, 0}, {mtime, 0}, {ctime, 0}, {uid, 0}, {gid, 0}],
+ TarFile = "reproducible.tar",
+ {ok, Tar} = erl_tar:open(TarFile, [write]),
+ ok = erl_tar:add(Tar, "file", Opts),
+ ok = erl_tar:add(Tar, "empty_directory", Opts),
+ ok = erl_tar:add(Tar, <<"contents">>, "memory_file", Opts),
+ erl_tar:close(Tar),
+
+ ok = file:make_dir("extracted"),
+ erl_tar:extract(TarFile, [{cwd, "extracted"}]),
+
+ {ok, #file_info{mtime=0}} =
+ file:read_file_info("extracted/empty_directory", [{time, posix}]),
+ {ok, #file_info{mtime=0}} =
+ file:read_file_info("extracted/file", [{time, posix}]),
+ {ok, #file_info{mtime=0}} =
+ file:read_file_info("extracted/memory_file", [{time, posix}]),
+
+ ok.
 
 %% Delete the given list of files.
 delete_files([]) -> ok;
-- 
2.16.1

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File 2369-Add-options-for-creating-reproducible-tars.patch of Package erlang (Revision b1dff5cbf87755f120bfe931af793e05)

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