Re: BUG: No way to set fsck.<msg-id> when cloning

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On Thu, May 24 2018, Kevin Daudt wrote:

> On Thu, May 24, 2018 at 05:25:29PM +0200, Ævar Arnfjörð Bjarmason wrote:
>> When I do:
>>
>>     git -c fetch.fsckObjects=true clone git@xxxxxxxxxx:robbyrussell/oh-my-zsh.git
>>
>> I get:
>>
>>     error: object 2b7227859263b6aabcc28355b0b994995b7148b6: zeroPaddedFilemode: contains zero-padded file modes
>>     fatal: Error in object
>>     fatal: index-pack failed
>>
>> The docs (https://git-scm.com/docs/git-config#git-config-fsckltmsg-idgt)
>> say you can override this with -c fsck.zeroPaddedFilemode = ignore, but
>> I see in builtin/fsck.c that just fsck_config() knows about this, and
>> indeed this works *after* you clone the repo when you use 'git fsck'.
>>
>> I don't have time to fix this now, but what's the best approach here?
>> Make all the relevant commands copy what fsck_config() is doing, or
>> should fsck_object() be lazily looking up this config by itself?
>
> Apparently someone reported this earlier[0]. Johannes replied:
>
>>  Well, you can apparently have your cake and eat it too (see
>> https://git-scm.com/docs/git-config#git-config-receivefsckltmsg-idgt):
>>
>> receive.fsck.<msg-id>::
>>         When `receive.fsckObjects` is set to true, errors can be switched
>>         to warnings and vice versa by configuring the `receive.fsck.<msg-id>`
>>         setting where the `<msg-id>` is the fsck message ID and the value
>>         is one of `error`, `warn` or `ignore`. For convenience, fsck prefixes
>>         the error/warning with the message ID, e.g. "missingEmail: invalid
>>         author/committer line - missing email" means that setting
>>         `receive.fsck.missingEmail = ignore` will hide that issue.
>>
>> In your case, use receive.fsck.zeroPaddedFilemode=ignore=warn (or
>> =ignore).
>
> [0]https://public-inbox.org/git/alpine.DEB.2.21.1.1801042125430.32@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/
>
> Hope this helps, Kevin.

That doesn't work, because that's for the server-side, but I need the
fetch.fsck.* that doesn't exist. This works (I'll send a better patch
with tests / docs etc. soon):

diff --git a/fetch-pack.c b/fetch-pack.c
index 490c38f833..9e4282788e 100644
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -19,6 +19,7 @@
 #include "sha1-array.h"
 #include "oidset.h"
 #include "packfile.h"
+#include "fsck.h"

 static int transfer_unpack_limit = -1;
 static int fetch_unpack_limit = -1;
@@ -33,6 +34,7 @@ static int agent_supported;
 static int server_supports_filtering;
 static struct lock_file shallow_lock;
 static const char *alternate_shallow_file;
+static struct strbuf fsck_msg_types = STRBUF_INIT;

 /* Remember to update object flag allocation in object.h */
 #define COMPLETE	(1U << 0)
@@ -935,7 +937,8 @@ static int get_pack(struct fetch_pack_args *args,
 			 */
 			argv_array_push(&cmd.args, "--fsck-objects");
 		else
-			argv_array_push(&cmd.args, "--strict");
+			argv_array_pushf(&cmd.args, "--strict%s",
+					 fsck_msg_types.buf);
 	}

 	cmd.in = demux.out;
@@ -1409,6 +1412,31 @@ static struct ref *do_fetch_pack_v2(struct fetch_pack_args *args,
 	return ref;
 }

+static int fetch_pack_config_cb(const char *var, const char *value, void *cb)
+{
+	if (strcmp(var, "fetch.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, "fetch.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;
+	}
+
+	return git_default_config(var, value, cb);
+}
+
 static void fetch_pack_config(void)
 {
 	git_config_get_int("fetch.unpacklimit", &fetch_unpack_limit);
@@ -1417,7 +1445,7 @@ static void fetch_pack_config(void)
 	git_config_get_bool("fetch.fsckobjects", &fetch_fsck_objects);
 	git_config_get_bool("transfer.fsckobjects", &transfer_fsck_objects);

-	git_config(git_default_config, NULL);
+	git_config(fetch_pack_config_cb, NULL);
 }

 static void fetch_pack_setup(void)



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