Merge branch 'js/fsck-opt'

Allow ignoring fsck errors on specific set of known-to-be-bad
objects, and also tweaking warning level of various kinds of non
critical breakages reported.

* js/fsck-opt:
  fsck: support ignoring objects in `git fsck` via fsck.skiplist
  fsck: git receive-pack: support excluding objects from fsck'ing
  fsck: introduce `git fsck --connectivity-only`
  fsck: support demoting errors to warnings
  fsck: document the new receive.fsck.<msg-id> options
  fsck: allow upgrading fsck warnings to errors
  fsck: optionally ignore specific fsck issues completely
  fsck: disallow demoting grave fsck errors to warnings
  fsck: add a simple test for receive.fsck.<msg-id>
  fsck: make fsck_tag() warn-friendly
  fsck: handle multiple authors in commits specially
  fsck: make fsck_commit() warn-friendly
  fsck: make fsck_ident() warn-friendly
  fsck: report the ID of the error/warning
  fsck (receive-pack): allow demoting errors to warnings
  fsck: offer a function to demote fsck errors to warnings
  fsck: provide a function to parse fsck message IDs
  fsck: introduce identifiers for fsck messages
  fsck: introduce fsck options

1 files changed, 26 insertions, 2 deletions

diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index 94d0571..4ced2eb 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -19,6 +19,7 @@
 #include "tag.h"
 #include "gpg-interface.h"
 #include "sigchain.h"
+#include "fsck.h"
 
 static const char receive_pack_usage[] = "git receive-pack <git-dir>";
 
@@ -36,6 +37,7 @@ static enum deny_action deny_current_branch = DENY_UNCONFIGURED;
 static enum deny_action deny_delete_current = DENY_UNCONFIGURED;
 static int receive_fsck_objects = -1;
 static int transfer_fsck_objects = -1;
+static struct strbuf fsck_msg_types = STRBUF_INIT;
 static int receive_unpack_limit = -1;
 static int transfer_unpack_limit = -1;
 static int advertise_atomic_push = 1;
@@ -115,6 +117,26 @@ static int receive_pack_config(const char *var, const char *value, void *cb)
 		return 0;
 	}
 
+	if (strcmp(var, "receive.fsck.skiplist") == 0) {
+		const char *path;
+
+		if (git_config_pathname(&path, var, value))
+			return 1;
+		strbuf_addf(&fsck_msg_types, "%cskiplist=%s",
+			fsck_msg_types.len ? ',' : '=', path);
+		free((char *)path);
+		return 0;
+	}
+
+	if (skip_prefix(var, "receive.fsck.", &var)) {
+		if (is_valid_msg_type(var, value))
+			strbuf_addf(&fsck_msg_types, "%c%s=%s",
+				fsck_msg_types.len ? ',' : '=', var, value);
+		else
+			warning("Skipping unknown msg id '%s'", var);
+		return 0;
+	}
+
 	if (strcmp(var, "receive.fsckobjects") == 0) {
 		receive_fsck_objects = git_config_bool(var, value);
 		return 0;
@@ -1490,7 +1512,8 @@ static const char *unpack(int err_fd, struct shallow_info *si)
 		if (quiet)
 			argv_array_push(&child.args, "-q");
 		if (fsck_objects)
-			argv_array_push(&child.args, "--strict");
+			argv_array_pushf(&child.args, "--strict%s",
+				fsck_msg_types.buf);
 		child.no_stdout = 1;
 		child.err = err_fd;
 		child.git_cmd = 1;
@@ -1508,7 +1531,8 @@ static const char *unpack(int err_fd, struct shallow_info *si)
 		argv_array_pushl(&child.args, "index-pack",
 				 "--stdin", hdr_arg, keep_arg, NULL);
 		if (fsck_objects)
-			argv_array_push(&child.args, "--strict");
+			argv_array_pushf(&child.args, "--strict%s",
+				fsck_msg_types.buf);
 		if (fix_thin)
 			argv_array_push(&child.args, "--fix-thin");
 		child.out = -1;