Implement --exclude-if-present

[wavexx]

Add a new --exclude-if-present command-line flag to attic create. If
specified, directories containing the specified tag file will be excluded from
the backup. The flag can be repeated to ignore more than a single tag file,
irregardless of the contents.

Tests included. See issue #128.

[wavexx]

In the last commit I also implement '--keep-tag-files', which is akin to the last-slash rule of the exclude paths. It includes the root of the directory and the tag file itself, without including anything else.

It's very helpful to restore paths which are meant to be persistent and/or know which directories were excluded due to --exclude-caches/--exclude-if-present a posteriori.

[wavexx]

Looks like the CI build failed for an unrelated reason on python 3.3

[madaboutcode]

Can we try to trigger this build once more? It clearly looks like it failed for an unrelated reason.
I would really like to see this feature in attic. I work on a lot of random projects and this would let me backup my entire project directory while tagging certain folders to be excluded.

[wavexx]

On 01/13/2015 05:37 AM, Ajeesh Mohan wrote:

Can we try to trigger this build once
more? It clearly looks like it
failed for an unrelated reason. I would really like to see this
feature in attic. I work on a lot of random projects and this would
let me backup my entire project directory while tagging certain
folders to be excluded.

I've been using this (and the other 2 PR) as part of my daily backups
since the PR request was made.

I'm open to rework the patch, so please ask if there's any question.

[ThomasWaldmann]

If the local unit test succeed, I suggest your trigger the travis build again by doing some minimal changeset. E.g. you could add docs about your change.

[hoxu]

I hope this is still being worked on. I would really like to see this feature, current exclude options are not sufficient.