Are revlog diff calculated as "text" ALWAYS?

[Jesus Cea]

On 13/05/14 10:22, Kastner Masilko, Friedrich wrote:

> I just tried that with 2.7.1, and indeed the first character-adding
> triggers a second snapshot. However, repeated character-adding does
> not do that for me:

My fault. "echo "X" >>z" adds a linefeed. Try "echo -n "X" >>z".

> The first double snapshot is interesting, though, but I guess here it
> is not so much about the diffing, but about the revlog format. The
> later has rules when a full snapshot or a delta should be applied. I
> don't want to go into details, but one thing seems to be clear from
> my test: 2.7.1 is not using a text-based diff for revlog creation.

It is. Try the "echo -n 'X' >>z" version to avoid inserting linefeeds.
Sorry, my mistake.

My point is that since Mercurial already recognize files as binary, and
refuse to show a diff if you doesn't specify "hg diff --text", we could
use a binary diff backend anyway in those cases.

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