Revamp results target

Teach it to always finish (closes #220), document it should be run on
the latest stable version of Postgres, and note that alternate output
files will not be updated. Swap `runjusttests.out` alternates so the
output from Postgres 16 is in the default file.

Also update `.gitignore` to ignore more compiler-generated files (it was
not ignoring `pgtap.o`).

.gitignore

@@ -6,15 +6,20 @@ pgtap-core.sql
 pgtap-schema.sql
 uninstall_pgtap.sql
 results
-pgtap.so
-pgtap.dylib
-pgtap.dll
 regression.*
 *.html
 *.html1
 *.sql.orig
 bbin
 
+# Compiler-generated files (borrowed from
+# https://github.com/github/gitignore/blob/main/C.gitignore)
+*.o
+*.dll
+*.so
+*.so.*
+*.dylib
+
 /sql/pgtap--?.??.?.sql
 /sql/pgtap--?.?.?.sql
 /sql/pgtap-core--*

Makefile

@@ -490,15 +490,14 @@ latest-changes.md: Changes
 #
 # STOLEN FROM pgxntool
 #
-
-# TARGET results: runs `make test` and copies all result files to test/expected/. DO NOT RUN THIS UNLESS YOU'RE CERTAIN ALL YOUR TESTS ARE PASSING!
+# TARGET results: runs `make test` and copies all result files to
+# test/expected/. Use for basic test changes with the latest version of
+# Postgres, but be aware that alternate `_n.out` files will not be updated.
+# DO NOT RUN THIS UNLESS YOU'RE CERTAIN ALL YOUR TESTS ARE PASSING!
 .PHONY: results
-results: installcheck result-rsync
-
-.PHONY:
-result-rsync:
+results:
+	$(MAKE) installcheck || true
 	rsync -rlpgovP results/ test/expected
 
-
 # To use this, do make print-VARIABLE_NAME
 print-%	: ; $(info $* is $(flavor $*) variable set to "$($*)") @true

test/expected/runjusttests.out

@@ -25,6 +25,7 @@ ok 3 - whatever.testplpgsql
     #         CONSTRAINT: CONSTRAINT
     #         TYPE:       TYPE
     #         CONTEXT:
+    #             PL/pgSQL function __die() line 3 at RAISE
     #             SQL statement "SELECT __die();"
     #             PL/pgSQL function whatever.testplpgsqldie() line 43 at EXECUTE
     #             PL/pgSQL function _runner(text[],text[],text[],text[],text[]) line 62 at FOR over EXECUTE statement

test/expected/runjusttests_5.out

@@ -25,7 +25,6 @@ ok 3 - whatever.testplpgsql
     #         CONSTRAINT: CONSTRAINT
     #         TYPE:       TYPE
     #         CONTEXT:
-    #             PL/pgSQL function __die() line 3 at RAISE
     #             SQL statement "SELECT __die();"
     #             PL/pgSQL function whatever.testplpgsqldie() line 43 at EXECUTE
     #             PL/pgSQL function _runner(text[],text[],text[],text[],text[]) line 62 at FOR over EXECUTE statement