File 1673-stdlib-Search-XDG_CONFIG_HOME-for-.erlang.... of Package erlang

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File 1673-stdlib-Search-XDG_CONFIG_HOME-for-.erlang.crypt.patch of Package erlang (Revision 62614e362dc3ec433dd252b94460863a)

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From e0388c9cc6e7a6e6c583f5688a164ba6efd03bb8 Mon Sep 17 00:00:00 2001
From: Lukas Larsson <lukas@erlang.org>
Date: Wed, 27 Oct 2021 09:53:06 +0200
Subject: [PATCH 3/7] stdlib: Search $XDG_CONFIG_HOME for .erlang.crypt

---
 lib/compiler/test/compile_SUITE.erl | 95 +++++++++++++++++++++++------
 lib/stdlib/doc/src/beam_lib.xml     |  7 ++-
 lib/stdlib/src/beam_lib.erl         |  5 +-
 3 files changed, 83 insertions(+), 24 deletions(-)

diff --git a/lib/compiler/test/compile_SUITE.erl b/lib/compiler/test/compile_SUITE.erl
index 3a622fe2f8..f05f171d15 100644
--- a/lib/compiler/test/compile_SUITE.erl
+++ b/lib/compiler/test/compile_SUITE.erl
@@ -666,7 +666,7 @@ encrypted_abstr(Config) when is_list(Config) ->
 		  %% Now run the tests that require crypto.
 		  encrypted_abstr_1(Simple, Target),
 		  ok = file:delete(Target),
-		  ok = file:del_dir(filename:dirname(Target))
+		  ok = file:del_dir_r(filename:dirname(Target))
 	  end,
     
     %% Cleanup.
@@ -710,22 +710,77 @@ encrypted_abstr_1(Simple, Target) ->
     error = compile:file(Simple,
 			       [debug_info,{debug_info_key,42},report]),
 
-    %% Place the crypto key in .erlang.crypt.
     beam_lib:clear_crypto_key_fun(),
-    {ok,OldCwd} = file:get_cwd(),
-    ok = file:set_cwd(TargetDir),
 
-    error = compile:file(Simple, [encrypt_debug_info,report]),
-
-    NewKey = "better use another key here",
-    write_crypt_file(["[{debug_info,des3_cbc,simple,\"",NewKey,"\"}].\n"]),
-    {ok,simple} = compile:file(Simple, [encrypt_debug_info,report]),
-    verify_abstract("simple.beam", erl_abstract_code),
-    ok = file:delete(".erlang.crypt"),
-    beam_lib:clear_crypto_key_fun(),
-    {error,beam_lib,{key_missing_or_invalid,"simple.beam",abstract_code}} =
-	beam_lib:chunks("simple.beam", [abstract_code]),
-    ok = file:set_cwd(OldCwd),
+    %% Test to place the crypto file on disk. The test is dependent on the
+    %% $HOME of the emulator, so we do this test in another node.
+    TestHome = filename:join(TargetDir, "home"),
+    filelib:ensure_dir(TestHome),
+    HomeEnv = case os:type() of
+                  {win32, _} ->
+                      [Drive | Path] = filename:split(TestHome),
+                      [{"APPDATA", filename:join(TestHome,"AppData")},
+                       {"HOMEDRIVE", Drive}, {"HOMEPATH", Path}];
+                  _ ->
+                      [{"HOME", TestHome}]
+              end,
+
+    {ok, Peer, Node} = ?CT_PEER(#{ env => HomeEnv }),
+
+    erpc:call(
+      Node,
+      fun() ->
+              {ok,OldCwd} = file:get_cwd(),
+              ok = file:set_cwd(TargetDir),
+
+              error = compile:file(Simple, [encrypt_debug_info,report]),
+
+              CWDKey = "better use another key here",
+              CWDFile = ".erlang.crypt",
+              XDGKey = "better use yet another key here",
+              XDGFile = filename:join(
+                          filename:basedir(user_config,"erlang"),
+                          ".erlang.crypt"),
+              HOMEKey = "better use the home key here",
+              HOMEFile = filename:join(TestHome,".erlang.crypt"),
+
+              write_crypt_file(CWDFile, CWDKey),
+              write_crypt_file(XDGFile, XDGKey),
+              write_crypt_file(HOMEFile, HOMEKey),
+
+              %% First we test that .erlang.crypt in cwd works
+              {ok,simple} = compile:file(Simple, [encrypt_debug_info,report]),
+              verify_abstract("simple.beam", erl_abstract_code),
+              ok = file:delete(CWDFile),
+              beam_lib:clear_crypto_key_fun(),
+
+              %% Then we test that .erlang.crypt in HOME does **not** work
+              {error,beam_lib,{key_missing_or_invalid,"simple.beam",abstract_code}} =
+                  beam_lib:chunks("simple.beam", [abstract_code]),
+
+              %% Then we test that .erlang.crypt in HOME does work
+              {ok,simple} = compile:file(Simple, [encrypt_debug_info,report]),
+              verify_abstract("simple.beam", erl_abstract_code),
+              ok = file:delete(HOMEFile),
+              beam_lib:clear_crypto_key_fun(),
+
+              %% Then we test that .erlang.crypt in XDG does **not** work
+              {error,beam_lib,{key_missing_or_invalid,"simple.beam",abstract_code}} =
+                  beam_lib:chunks("simple.beam", [abstract_code]),
+
+
+              %% Then we test that .erlang.crypt in XDG does work
+              {ok,simple} = compile:file(Simple, [encrypt_debug_info,report]),
+              verify_abstract("simple.beam", erl_abstract_code),
+              ok = file:delete(XDGFile),
+
+              beam_lib:clear_crypto_key_fun(),
+              {error,beam_lib,{key_missing_or_invalid,"simple.beam",abstract_code}} =
+                  beam_lib:chunks("simple.beam", [abstract_code])
+
+      end),
+
+    peer:stop(Peer),
 
     %% Test key compatibility by reading a BEAM file produced before
     %% the update to the new crypto functions.
@@ -738,11 +793,11 @@ encrypted_abstr_1(Simple, Target) ->
 
     ok.
 
-
-write_crypt_file(Contents0) ->
-    Contents = list_to_binary([Contents0]),
-    io:format("~s\n", [binary_to_list(Contents)]),
-    ok = file:write_file(".erlang.crypt", Contents).
+write_crypt_file(File, Key) ->
+    Contents = ["[{debug_info,des3_cbc,simple,\"",Key,"\"}].\n"],
+    io:format("~s: ~s\n", [File, Contents]),
+    ok = filelib:ensure_dir(File),
+    ok = file:write_file(File, Contents).
 
 encrypted_abstr_no_crypto(Simple, Target) ->
     io:format("simpe: ~p~n", [Simple]),
diff --git a/lib/stdlib/doc/src/beam_lib.xml b/lib/stdlib/doc/src/beam_lib.xml
index ffd0b95973..1eb266c7ae 100644
--- a/lib/stdlib/doc/src/beam_lib.xml
+++ b/lib/stdlib/doc/src/beam_lib.xml
@@ -138,8 +138,11 @@ io:fwrite("~s~n", [erl_prettypr:format(erl_syntax:form_list(AC))]).</code>
   <section>
     <title>.erlang.crypt</title>
     <p><c>beam_lib</c> searches for <c>.erlang.crypt</c> in the current
-      directory and then the home directory for the current user. If
-      the file is found and contains a key, <c>beam_lib</c>
+      directory, then the <seeerl marker="erts:init#home">
+      user&apos;s home directory</seeerl> and then
+      <seeerl marker="stdlib:filename#user_config">
+        <c>filename:basedir(user_config, "erlang")</c></seeerl>.
+      If the file is found and contains a key, <c>beam_lib</c>
       implicitly creates a crypto key fun and registers it.</p>
 
     <p>File <c>.erlang.crypt</c> is to contain a single list of tuples:</p>
diff --git a/lib/stdlib/src/beam_lib.erl b/lib/stdlib/src/beam_lib.erl
index 12b0f53b42..17a430d87b 100644
--- a/lib/stdlib/src/beam_lib.erl
+++ b/lib/stdlib/src/beam_lib.erl
@@ -1150,11 +1150,12 @@ terminate(_Reason, _State) ->
     ok.
 
 crypto_key_fun_from_file() ->
+    UserConfig = filename:basedir(user_config,"erlang"),
     case init:get_argument(home) of
 	{ok,[[Home]]} ->
-	    crypto_key_fun_from_file_1([".",Home]);
+	    crypto_key_fun_from_file_1([".", Home, UserConfig]);
 	_ ->
-	    crypto_key_fun_from_file_1(["."])
+	    crypto_key_fun_from_file_1([".", UserConfig])
     end.
 
 crypto_key_fun_from_file_1(Path) ->
-- 
2.31.1

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File 1673-stdlib-Search-XDG_CONFIG_HOME-for-.erlang.crypt.patch of Package erlang (Revision 62614e362dc3ec433dd252b94460863a)

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