New utility for NILFS2 partition

[Sergey Kamenev]

Hi folks!

I wrote utility for NILFS2 partition:

n2u

Repository: https://github.com/sukamenev/nilfs2_tools

She's working like "svn" command.

n2u can display the change history of a specific file / directory:

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n2u log filename
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The output is something like this:

   CHECKPOINT DATE            TIME         TYPE SIZE MODE
         1787552 2019-11-24 22:08:00 first 7079 cp
         1792659 2019-11-25 23:09:05 changed 7081 cp

It works quite quickly for the chosen implementation method: it searches for differences between files using the bisection method, quickly mounting and comparing the file / directory in different images.

You can specify a range of checkpoints using the -cp key CP1: CP2 or -cp {YEAR-MM-DD}: {YEAR-MM-DD}.

You can also see the difference between the checkpoints for a specific file or directory:

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n2u diff -r cp1: cp2 filename
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You can display the entire chronology of changes: all the differences between the checkpoints of a specific file / directory:

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n2u blame [-r cp1: cp2] filename
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The date range in this command is also supported.

Happy using!
Sergey Kamenev