Re: RFE: git-patch-id should handle patches without leading "diff"

[Junio C Hamano <gitster@pobox.com>]

Jonathan Nieder <jrnieder@gmail.com> writes:

>> So it seems most sensible to me if this is going to be supported that we
>> go a bit beyond the call of duty and fake up the start of it, namely:
>>
>>     --- a/arch/x86/kernel/process.c
>>     +++ b/arch/x86/kernel/process.c
>>
>> To be:
>>
>>     diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
>>     --- a/arch/x86/kernel/process.c
>>     +++ b/arch/x86/kernel/process.c
>
> Right.  We may want to handle diff.mnemonicPrefix as well.

I definitely think under the --stable option, we should pretend as
if the canonical a/ vs b/ prefixes were given with the "diff --git"
header, just like we try to reverse the effect of diff-orderfile,
etc.

I am unsure what the right behaviour under --unstable is, though.