Consolidate cross-option checks in pg_restore

This moves one check for conflicting options from the archive restore
code to the main function where other similar checks are performed.
Also reword the error message to be consistent with other messages.

The only option combination impacted is --create specified with
--single-transaction, and informing the caller at an early step saves
from opening the archive worked on.  A TAP test is added for this
combination.

Author: Daniel Gustafsson
Reviewed-by: Fabien Coelho
Discussion: https://postgr.es/m/616808BD-4B59-4E6C-97A9-7317F62D5570@yesql.se

Author: michaelpq

src/bin/pg_dump/pg_backup_archiver.c

@@ -358,15 +358,6 @@ RestoreArchive(Archive *AHX)
 
 	AH->stage = STAGE_INITIALIZING;
 
-	/*
-	 * Check for nonsensical option combinations.
-	 *
-	 * -C is not compatible with -1, because we can't create a database inside
-	 * a transaction block.
-	 */
-	if (ropt->createDB && ropt->single_txn)
-		exit_horribly(modulename, "-C and -1 are incompatible options\n");
-
 	/*
 	 * If we're going to do parallel restore, there are some restrictions.
 	 */

src/bin/pg_dump/pg_restore.c

@@ -331,6 +331,17 @@ main(int argc, char **argv)
 		exit_nicely(1);
 	}
 
+	/*
+	 * -C is not compatible with -1, because we can't create a database inside
+	 * a transaction block.
+	 */
+	if (opts->createDB && opts->single_txn)
+	{
+		fprintf(stderr, _("%s: options -C/--create and -1/--single-transaction cannot be used together\n"),
+				progname);
+		exit_nicely(1);
+	}
+
 	if (numWorkers <= 0)
 	{
 		fprintf(stderr, _("%s: invalid number of parallel jobs\n"), progname);

src/bin/pg_dump/t/001_basic.pl

@@ -4,7 +4,7 @@
 use Config;
 use PostgresNode;
 use TestLib;
-use Test::More tests => 70;
+use Test::More tests => 72;
 
 my $tempdir       = TestLib::tempdir;
 my $tempdir_short = TestLib::tempdir_short;
@@ -150,3 +150,9 @@
 	[ 'pg_dumpall', '--if-exists' ],
 	qr/\Qpg_dumpall: option --if-exists requires option -c\/--clean\E/,
 	'pg_dumpall: option --if-exists requires option -c/--clean');
+
+command_fails_like(
+	[ 'pg_restore', '-C', '-1' ],
+	qr/\Qpg_restore: options -C\/--create and -1\/--single-transaction cannot be used together\E/,
+	'pg_restore: options -C\/--create and -1\/--single-transaction cannot be used together'
+);