Re: [PATCH v4 2/2] apply: reload .gitattributes after patching it

From: Phillip Wood <phillip.wood123@gmail.com>
To: "brian m. carlson" <sandals@crustytoothpaste.net>, git@vger.kernel.org
Cc: "SZEDER Gábor" <szeder.dev@gmail.com>,
	"Taylor Blau" <me@ttaylorr.com>, "Jeff King" <peff@peff.net>,
	"Junio C Hamano" <gitster@pobox.com>
Subject: Re: [PATCH v4 2/2] apply: reload .gitattributes after patching it
Date: Mon, 19 Aug 2019 10:55:27 +0100	[thread overview]
Message-ID: <2c33a668-4c7d-2114-41b1-8907c4384a15@gmail.com> (raw)
In-Reply-To: <9b940950-666a-0c4c-58c0-1e61ac9e654c@gmail.com>

On 19/08/2019 10:41, Phillip Wood wrote:
> [...]
>> diff --git a/convert.c b/convert.c
>> index 94ff837649..030e9b81b9 100644
>> --- a/convert.c
>> +++ b/convert.c
>> @@ -1293,10 +1293,11 @@ struct conv_attrs {
>>       const char *working_tree_encoding; /* Supported encoding or 
>> default encoding if NULL */
>>   };
>> +static struct attr_check *check;
> 
> I was concerned about the impact adding a file global if we ever want to 
> multi-thread this for submodules, but looking through the file there are 
> a couple of others already so this isn't creating a new problem.

Doh, I've just realized it was static already - ignore that.

One thing did occur to me though - does this patch reset attributes like 
the merge marker length (they're less critical though if there is a 
conflict after an attribute change it would be nice to have the correct 
length) or just the ones for filtering files?

Best Wishes

Phillip

> 
> Best Wishes
> 
> Phillip
> 
>> +
>>   static void convert_attrs(const struct index_state *istate,
>>                 struct conv_attrs *ca, const char *path)
>>   {
>> -    static struct attr_check *check;
>>       struct attr_check_item *ccheck = NULL;
>>       if (!check) {
>> @@ -1339,6 +1340,12 @@ static void convert_attrs(const struct 
>> index_state *istate,
>>           ca->crlf_action = CRLF_AUTO_INPUT;
>>   }
>> +void reset_parsed_attributes(void)
>> +{
>> +    attr_check_free(check);
>> +    check = NULL;
>> +}
>> +
>>   int would_convert_to_git_filter_fd(const struct index_state *istate, 
>> const char *path)
>>   {
>>       struct conv_attrs ca;
>> diff --git a/convert.h b/convert.h
>> index 831559f10d..3710969d43 100644
>> --- a/convert.h
>> +++ b/convert.h
>> @@ -94,6 +94,12 @@ void convert_to_git_filter_fd(const struct 
>> index_state *istate,
>>   int would_convert_to_git_filter_fd(const struct index_state *istate,
>>                      const char *path);
>> +/*
>> + * Reset the internal list of attributes used by convert_to_git and
>> + * convert_to_working_tree.
>> + */
>> +void reset_parsed_attributes(void);
>> +
>>   /*****************************************************************
>>    *
>>    * Streaming conversion support
>> diff --git a/t/t3400-rebase.sh b/t/t3400-rebase.sh
>> index 80b23fd326..23469cc789 100755
>> --- a/t/t3400-rebase.sh
>> +++ b/t/t3400-rebase.sh
>> @@ -301,6 +301,42 @@ test_expect_success 'rebase --am and 
>> --show-current-patch' '
>>       )
>>   '
>> +test_expect_success 'rebase --am and .gitattributes' '
>> +    test_create_repo attributes &&
>> +    (
>> +        cd attributes &&
>> +        test_commit init &&
>> +        git config filter.test.clean "sed -e 
>> '\''s/smudged/clean/g'\''" &&
>> +        git config filter.test.smudge "sed -e 
>> '\''s/clean/smudged/g'\''" &&
>> +
>> +        test_commit second &&
>> +        git checkout -b test HEAD^ &&
>> +
>> +        echo "*.txt filter=test" >.gitattributes &&
>> +        git add .gitattributes &&
>> +        test_commit third &&
>> +
>> +        echo "This text is smudged." >a.txt &&
>> +        git add a.txt &&
>> +        test_commit fourth &&
>> +
>> +        git checkout -b removal HEAD^ &&
>> +        git rm .gitattributes &&
>> +        git add -u &&
>> +        test_commit fifth &&
>> +        git cherry-pick test &&
>> +
>> +        git checkout test &&
>> +        git rebase master &&
>> +        grep "smudged" a.txt &&
>> +
>> +        git checkout removal &&
>> +        git reset --hard &&
>> +        git rebase master &&
>> +        grep "clean" a.txt
>> +    )
>> +'
>> +
>>   test_expect_success 'rebase--merge.sh and --show-current-patch' '
>>       test_create_repo conflict-merge &&
>>       (
>>