[PATCH v8 2/6] Add file name / file line context for incorrect regex in ident files.

For consistency with all other error messages report those information, which
are indeed useful to debug configuration errors.

Author: Julien Rouhaud
Reviewed-by: FIXME
Discussion: https://postgr.es/m/20220223045959.35ipdsvbxcstrhya%40jrouhaud
---
 src/backend/libpq/hba.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/backend/libpq/hba.c b/src/backend/libpq/hba.c
index 327a4b42af..1ad09f7dc6 100644
--- a/src/backend/libpq/hba.c
+++ b/src/backend/libpq/hba.c
@@ -2372,7 +2372,9 @@ parse_ident_line(TokenizedAuthLine *tok_line, int elevel)
 			ereport(elevel,
 					(errcode(ERRCODE_INVALID_REGULAR_EXPRESSION),
 					 errmsg("invalid regular expression \"%s\": %s",
-							parsedline->ident_user + 1, errstr)));
+							parsedline->ident_user + 1, errstr),
+					 errcontext("line %d of configuration file \"%s\"",
+							line_num, IdentFileName)));
 
 			*err_msg = psprintf("invalid regular expression \"%s\": %s",
 								parsedline->ident_user + 1, errstr);
-- 
2.37.0


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