dirdup

A duplicate finder across multiple systems. The project is incomplete. Help and patches are welcome.

At this moment, version 0.0 has been released. This is just to prove the concept and let myself start working on my personal folders.

The following 0.0.x versions should be more arbitrary changes for concept changes, etc. Commands and output may (and will) break.

Proper development should start now to get to version 0.1 until we get to version 1.0.

What's next:

Improve the index format to speed up its load time and make it friendlier for Dropbox storage. Currently, each change implies the reupload of the whole for a storage.
Fix the command-line API. Currently, command names and options were taken on the fly, so, it's headed to being a mess.
Implement other possible uses, like locating files based on name and size.
Fix terminology. Use the words "storage" and "index" as opposed to previous attempts like "seed" and fix term-consistency issues.
Rename the whole project and repo. Dirdup is an inconvenient name.

How to use

The dirdup workflow is:

Use dirdup-add to add (declare) one or more storages. Do this under each system where you have a storage.
Use dirdup-refresh to index each of them. Thsi will take the size, mtime and MD5 hash of each file under it.
Use dirdup-find to find duplicates and locate files.
Erase some files, move them... Do this manually.
Refresh the indexes with dirdup-refresh to let dirdup know the new state.
Repeat from step 3.

Example

Scenario: You have a copy of some home files at work and viceversa. You modified them in either place and now you lost track of the current state of your data. You need to make some sense of it.

Please notice: this example uses home with two meanings: the place where you live (like the PC you have at home), and the home directory, which may be at home or at work. To distinguish both in this example, let's use home-pc for the hostname and homedir to alias the directory for your user under /home.

You create an empty directory which will be your dirdup "session". Using a USB flash memory is the best way to exemplify this. Let's say /USB is the path to your USB thumb drive.

you@home-pc:~$ **cd /USB**
you@home-pc:/USB$ **mkdir dirdup-session**
you@home-pc:/USB$ **cd dirdup-session**
you@home-pc:/USB/dirdup-session$

At home add your home directory and index it. Indexing will take quite some time because it takes the size, mtime and MD5 hash of each file. Let the indexing run overnight.
```
you@home-pc:/USB/dirdup-session$ **dirdup-add homedir /home/you**
you@home-pc:/USB/dirdup-session$ **dirdup-refresh homedir**
```
Don't worry if you cancel dirdup-refresh. The half-finished index is kept on disk. It will not be generally used, but dirdup-refresh will use
At work, do the same. Remember you have a home directory at work too. We can call both homedir because dirdup uses different namespaces for each device. Dirdup will detect what host are you in and use that namespace.
```
you@work-pc:/USB/dirdup-session$ **dirdup-add homedir /home/you**
you@work-pc:/USB/dirdup-session$ **dirdup-refresh homedir**
```
You are using your USB which you are carrying it with you at home and work, so you will have both declarations now. Verify it with:
```
you@work-pc:/USB/dirdup-session$ **find accesses -type f**
accesses/home-pc/home-pc/homedir
accesses/work-pc/work-pc/homedir
you@work-pc:/USB/dirdup-session$ **cat accesses/home-pc/home-pc/homedir**
file:/home/you
```

With these indexes, if you have the same file in both computers, dirdup will be able to detect it.

# This section is under construction; dirdup-find is still being developed.
you@work-pc:/USR/dirdup-session$ **dirdup-find --type ff**

Please stay tuned as dirdup continues being developed

alvarezp/dirdup

dirdup

How to use

Example

Please stay tuned as dirdup continues being developed