[edk2-devel] Public-Service-Announcement: send-email issues with Git 2.22.0+

[Nate DeSimone]

Hi Leif,

On 12/4/2019 4:13 AM, Leif Lindholm wrote:
> Hi Nate,
>
> On Wed, Dec 04, 2019 at 04:31:04 +0000, Nate DeSimone wrote:
>> I have been dealing with a very frustrating issue recently where all
>> of my "CR LF" line endings get erroneously converted into "LF LF"
>> once I send my patch to the mailing list. I have discovered the root
>> cause for this problem. The issue is the following commit to git
>> itself:
>>
>> https://github.com/git/git/commit/5983ddc165221c3ec2a4299b65cfb2ecc1ce7765
>>
>> This change is present in git version 2.20.0 or later, per the release notes:
>>
>> https://github.com/git/git/blob/v2.22.0/Documentation/RelNotes/2.22.0.txt
>>
>> With this change, if you leave sendemail.transferEncoding set to the
>> default value of "auto", then git will inspect the body of your
>> email. If it finds a '\r' character in the message, then it converts
>> the entire message content into Quoted-Printable encoding. It
>> appears that when groups.io converts the QP encoding back to text
>> format, the '\r' characters somehow become '\n'. To workaround this
>> make sure to set the following configuration option:
>>
>> git config --global sendemail.transferEncoding 8bit
> Thanks for this investigation.
>
> Just one warning to readers - while convenient, --global may not be
> the correct course of action for all developers.
>
>> This will prevent send-email from converting the message into QP
>> encoding, allowing the patches to pass through to the mailing list
>> unharmed. Hope that saves other people a few hours of frustration.
> Could you possibly submit a patch adding this setting to this table
> https://github.com/tianocore/edk2/blob/master/BaseTools/Scripts/SetupGit.py#L54
> such that it gets set automatically by that script?
> This way it's conveniently configured per-tree with the other known
> good default settings.


I have submitted the patch per your request:


https://edk2.groups.io/g/devel/message/52014


>
> I got curious and looked into what the git documentation says about
> this option.
>
> For 2.9.1 (the first search hit, July 2016) it says:
> "Default is the value of the sendemail.transferEncoding configuration
> value; if that is unspecified, git will use 8bit and not add a
> Content-Transfer-Encoding header."
>
> For 2.24.0 (the current release, November 2019) it says:
> "Default is the value of the sendemail.transferEncoding configuration
> value; if that is unspecified, default to auto."
>
> So a user of old git versions might not even have tripped over
> this...
>
> Best Regards,
>
> Leif
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