Subject: Re: [PATCH] use local cloning if insteadOf makes a local URL

From: Michael Barabanov <[email-masked]>
Date: Thu, 17 Jul 2014 11:41:26 -0700

On 07/17/2014 10:23 AM, Junio C Hamano wrote:
> Michael Barabanov <[email-masked]> writes:
>> Move the is_local logic to the place where origin remote has been setup and
>> check if the remote url can be used to do local cloning.
>>
>> This saves a lot of space (and time) in some of the mirroring scenarios that
>> involve insteadOf rewrites.
>>
>> Signed-off-by: Michael Barabanov <[email-masked]>
>> ---
>
> Strictly speaking, this change introduces a regression to those who
> would rather use --no-local if they knew the are cloning from a
> local copy, but they can rewrite their insteadOf to use file:// URL
> as a workaround.

Plus --no-local still works on command line, even if rewritten URL ends 
up to be local.

>
> The code change looked OK from a cursory read, modulo possibly
> introducing a new memory leak on the old value of "path" (I didn't
> check carefully).

In fact, I couldn't find where original "path" is freed anyway.
Memory will be freed when the clone process exits of course.

Michael.

>
> Thanks.
>
>>  builtin/clone.c | 25 +++++++++++++------------
>>  1 file changed, 13 insertions(+), 12 deletions(-)
>>
>> diff --git a/builtin/clone.c b/builtin/clone.c
>> index f0dabec..bbd169c 100644
>> --- a/builtin/clone.c
>> +++ b/builtin/clone.c
>> @@ -799,18 +799,6 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
>>  		die(_("repository '%s' does not exist"), repo_name);
>>  	else
>>  		repo = repo_name;
>> -	is_local = option_local != 0 && path && !is_bundle;
>> -	if (is_local) {
>> -		if (option_depth)
>> -			warning(_("--depth is ignored in local clones; use file:// instead."));
>> -		if (!access(mkpath("%s/shallow", path), F_OK)) {
>> -			if (option_local > 0)
>> -				warning(_("source repository is shallow, ignoring --local"));
>> -			is_local = 0;
>> -		}
>> -	}
>> -	if (option_local > 0 && !is_local)
>> -		warning(_("--local is ignored"));
>>
>>  	/* no need to be strict, transport_set_option() will validate it again */
>>  	if (option_depth && atoi(option_depth) < 1)
>> @@ -903,6 +891,19 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
>>
>>  	remote = remote_get(option_origin);
>>  	transport = transport_get(remote, remote->url[0]);
>> +	path = get_repo_path(remote->url[0], &is_bundle);
>> +	is_local = option_local != 0 && path && !is_bundle;
>> +	if (is_local) {
>> +		if (option_depth)
>> +			warning(_("--depth is ignored in local clones; use file:// instead."));
>> +		if (!access(mkpath("%s/shallow", path), F_OK)) {
>> +			if (option_local > 0)
>> +				warning(_("source repository is shallow, ignoring --local"));
>> +			is_local = 0;
>> +		}
>> +	}
>> +	if (option_local > 0 && !is_local)
>> +		warning(_("--local is ignored"));
>>  	transport->cloning = 1;
>>
>>  	if (!transport->get_refs_list || (!is_local && !transport->fetch))
>