1:  caec9379055 = 1:  caec9379055 oauth: Report cleanup errors as warnings on stderr
2:  6a2eda46927 ! 2:  7228af114ca libpq: Add PQgetThreadLock() to mirror PQregisterThreadLock()
    @@ Commit message
         Reviewed-by: Zsolt Parragi <zsolt.parragi@percona.com>
         Discussion: https://postgr.es/m/CAOYmi%2BmEU_q9sr1PMmE-4rLwFN%3DOjyndDwFZvpsMU3RNJLrM9g%40mail.gmail.com
     
    + ## doc/src/sgml/libpq.sgml ##
    +@@ doc/src/sgml/libpq.sgml: int PQisthreadsafe();
    +    Kerberos calls because Kerberos functions are not thread-safe.  See
    +    function <function>PQregisterThreadLock</function> in the
    +    <application>libpq</application> source code for a way to do cooperative
    +-   locking between <application>libpq</application> and your application.
    ++   locking between <application>libpq</application> and your application. (Note
    ++   that it is only safe to call <function>PQregisterThreadLock</function> when
    ++   there are no open connections.) Clients may retrieve the current locking
    ++   callback with <function>PQgetThreadLock</function>; if no custom callback
    ++   has been registered, a default is used.
    +   </para>
    + 
    +   <para>
    +
      ## src/interfaces/libpq/exports.txt ##
     @@ src/interfaces/libpq/exports.txt: PQgetAuthDataHook         207
      PQdefaultAuthDataHook     208
3:  12d4224bf61 ! 3:  751df22f99d libpq: Introduce PQAUTHDATA_OAUTH_BEARER_TOKEN_V2
    @@ src/test/modules/oauth_validator/t/002_client.pl: if ($ENV{with_libcurl} ne 'yes
      $common_connstr = "$common_connstr connect_timeout=1";
      test(
     @@ src/test/modules/oauth_validator/t/002_client.pl: foreach my $c (@cases)
    + 		"hook misbehavior: $c->{'flag'}",
    + 		flags => [ $c->{'flag'} ],
      		expected_stderr => $c->{'expected_error'});
    ++
    ++	test(
    ++		"hook misbehavior: $c->{'flag'} (v1)",
    ++		flags => [ '-v1', $c->{'flag'} ],
    ++		expected_stderr => $c->{'expected_error'});
      }
      
     +# v2 async flows should be able to set error messages, too.
4:  84d8dcd390e = 4:  fb9915437da libpq-oauth: Use the PGoauthBearerRequestV2 API
5:  e6b7735576b = 5:  ed6e7268ec2 libpq-oauth: Never link against libpq's encoding functions
-:  ----------- > 6:  e4b09853e3a WIP: test out poisoning
6:  e4e5c5164b8 ! 7:  3d6d0901f7e WIP: Introduce third-party OAuth flow plugins?
    @@ src/interfaces/libpq-oauth/oauth-curl.h (deleted)
     
      ## src/interfaces/libpq/fe-auth-oauth.h ##
     @@ src/interfaces/libpq/fe-auth-oauth.h: typedef struct
    - 	void	   *async_ctx;
      
    + 	bool		v1;
      	bool		builtin;
     -	void	   *builtin_flow;
     +	void	   *flow_module;
    @@ src/interfaces/libpq/fe-auth-oauth.c: extern int	pg_start_oauthbearer(PGconn *co
      }
      
     @@ src/interfaces/libpq/fe-auth-oauth.c: setup_token_request(PGconn *conn, fe_oauth_state *state)
    - 	if (res == 0)
    - 		res = PQauthDataHook(PQAUTHDATA_OAUTH_BEARER_TOKEN, conn, &request);
    + 		poison_req_v2(&request, false);
    + 	}
      	if (res == 0)
     -	{
     -		state->builtin = true;
    @@ src/interfaces/libpq/fe-auth-oauth.c: setup_token_request(PGconn *conn, fe_oauth
     -	return true;
      
      fail:
    - 	if (request.v1.cleanup)
    + 	do_cleanup(state, &request);
     
      ## src/test/modules/oauth_validator/meson.build ##
     @@ src/test/modules/oauth_validator/meson.build: test_install_libs += magic_validator
    @@ src/test/modules/oauth_validator/t/002_client.pl: if ($ENV{with_libcurl} ne 'yes
      		flags => ["--no-hook"],
      		expected_stderr =>
      		  qr/no OAuth flows are available \(try installing the libpq-oauth package\)/
    +@@ src/test/modules/oauth_validator/t/002_client.pl: foreach my $c (@cases)
    + 	test(
    + 		"hook misbehavior: $c->{'flag'} (v1)",
    + 		flags => [ '-v1', $c->{'flag'} ],
    ++		hook_only => 1,    # plugins can't use -v1
    + 		expected_stderr => $c->{'expected_error'});
    + }
    + 
     @@ src/test/modules/oauth_validator/t/002_client.pl: test(
      	expected_stderr =>
      	  qr/user-defined OAuth flow failed: async error message/);