[RFC PATCH v2 13/22] blame: make sanity_check use a callback in scoreboard

[Jeff Smith <whydoubt@xxxxxxxxx>]

Allow the interface user to decide how to handle a failed sanity check,
whether that be to output with the current state or to do nothing.

Signed-off-by: Jeff Smith <whydoubt@xxxxxxxxx>
---
 blame.h         |  4 ++++
 builtin/blame.c | 23 +++++++++++++++--------
 2 files changed, 19 insertions(+), 8 deletions(-)

diff --git a/blame.h b/blame.h
index c140f41..e85db06 100644
--- a/blame.h
+++ b/blame.h
@@ -134,6 +134,10 @@ struct blame_scoreboard {
 	int show_root;
 	int xdl_opts;
 	int no_whole_file_rename;
+	int debug;
+
+	/* callbacks */
+	void(*on_sanity_fail)(struct blame_scoreboard *, int);
 };
 
 #endif /* BLAME_H */
diff --git a/builtin/blame.c b/builtin/blame.c
index bd295eb..d7b3b5a 100644
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -285,7 +285,7 @@ static void coalesce(struct blame_scoreboard *sb)
 		}
 	}
 
-	if (DEBUG) /* sanity */
+	if (sb->debug) /* sanity */
 		sanity_check_refcnt(sb);
 }
 
@@ -1682,7 +1682,7 @@ static void assign_blame(struct blame_scoreboard *sb, int opt)
 		}
 		origin_decref(suspect);
 
-		if (DEBUG) /* sanity */
+		if (sb->debug) /* sanity */
 			sanity_check_refcnt(sb);
 	}
 
@@ -2021,12 +2021,16 @@ static void sanity_check_refcnt(struct blame_scoreboard *sb)
 			baa = 1;
 		}
 	}
-	if (baa) {
-		int opt = 0160;
-		find_alignment(sb, &opt);
-		output(sb, opt);
-		die("Baa %d!", baa);
-	}
+	if (baa)
+		sb->on_sanity_fail(sb, baa);
+}
+
+static void sanity_check_on_fail(struct blame_scoreboard *sb, int baa)
+{
+	int opt = OUTPUT_SHOW_SCORE | OUTPUT_SHOW_NUMBER | OUTPUT_SHOW_NAME;
+	find_alignment(sb, &opt);
+	output(sb, opt);
+	die("Baa %d!", baa);
 }
 
 static unsigned parse_score(const char *arg)
@@ -2761,6 +2765,9 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
 	if (blame_copy_score)
 		sb.copy_score = blame_copy_score;
 
+	sb.debug = DEBUG;
+	sb.on_sanity_fail = &sanity_check_on_fail;
+
 	sb.show_root = show_root;
 	sb.xdl_opts = xdl_opts;
 	sb.no_whole_file_rename = no_whole_file_rename;
-- 
2.9.3