cyberluna

Cool! Have fun! Good to know. If you tried it and would like to share some feedback that would be nice

You're welcome! Thx! Glad you found it interesting!

Thanks for asking!

You could check out this thread for the main different features in lunas, and an overview of the syncing algo

https://programming.dev/comment/9461693

I took a look at their docs https://docs.syncthing.net/v1.27.5/users/foldertypes

And it seems similar

Src/send-only -> send files to other dest/receive-only

Dest/recieve-only -> doesn't send any file modifications or new files to other directories

Src+dest/normal -> send files to other dest and receives files from other srcs

With the option -D/-diff enabled file modifications can be synced, with newer files replacing older files

Thank you!

i'm not very knowledgeable with features of syncthing, but it's not exactly similar to syncthing. syncthing works well if you want a daemon working in the background checking for new added files, and then syncing them to remote

lunas doesn't have a daemon, maybe in the future that could be added idk.

idk if syncthing can sync file attributes and handle dereferencing symlink and checking for broken links, but lunas can do that

also lunas is a small 620K cli binary unlike syncthing which is a big 23M gui program

syncthing is more cross-platform than lunas. lunas works on Android tho, but inside Termux

but syncthing isn't good at local syncing as mentioned in their docs https://docs.syncthing.net/users/faq.html#does-syncthing-support-syncing-between-folders-on-the-same-system

lunas can do local syncing very well

quick overview of the syncing algo

• a simple overview

1- list all input directories content first

2- a table is made as a map, the rows are the files/dirs, the column numbers are the input directories in a specific order, what's inside each cell of each row, is the mtime, modification time, of that file in different input directory if -diff option was used

3- and it loops through the table to check what is a SRC AND has a newer mtime than another DEST, if so, it removes the dest and resyncs it

without the option -diff what gets filled in the cells of each row are true/false of whether that file exist in this input directory or not. and it just sync based on file name, and which SRC dir it detects first that would be the src of what is missing in the DEST

the ordering of the input directories in the table's columns, are as the user input them, but the local ones has a priority, they get listed first in these columns

so, the conflicts with the -diff option is resolve based on newer/older mtime and src/dest and the newer src updates the older dest. without it just based on file names which is more random, as explained

• a more techincal overview

1- list all input directories content first

2- in each input directory listing, add the content to vector A 'all_content', the type to vector B 'types', the input_dir_number of the file to vector C 'track_existence', and if option -diff is enabled, push the mtime to vector D 'track_existence_mtime'

i'm gonna explain with the option -diff first which let's it check for mtime, modification time, difference between files and sync based on that

-diff option enables '--attributes mtime' by default which makes sure if re-run it only resync the files if they were changed

'--mtime off' can be used as mentioned in the man page to avoid syncing the mtime

3- the all_content gets sorted using quick sort, and the other vectors follow its sorting order

4- a 2D vector/a table is made as an existence map, the rows are the files/dirs, the column numbers are the input directories in a specific order, what's inside each cell of each row, is the mtime of that file in different input directory

5- the track_existence vector should be cleared after that

6- and it loops through the 2D vector to check what is a SRC AND has a newer mtime than another DEST, if so, it removes the dest and resyncs it

without the option -diff the vector D 'track_existence_mtime' don't get filled, and what gets filled in the cells of each row are true/false of whether that file exist in this input directory or not. and it just sync based on file name, and which SRC dir it detects first that would be the src of what is missing in the DEST

the ordering of the input directories in the existence map columns, are as the user input them, but the local ones has a priority they get listed first in these columns

so, the conflicts with the -diff option is resolved based on newer/older mtime and src/dest and the newer src updates the older dest. without it just based on file names which is more random, as explained

in the copying, or filesystem in general, functions, C++ provide methods to check if certain operations were faulty or not, i use these methods combined with checking the return of remote reading/writing if successful or not, if a write or read to a buffer produced an error, syncing to that file stops and it goes to the next file. that file stays named as file.ls.part

lunas doesn't have checksum option, not yet at least i might add it later. so if that is a problem for someone, they could avoid using lunas for now

but i made a seperate program that checks recursively checksums of many input directories which i usually use when needed to check if lunas is working correctly or not

btw just to be clear, as mentioned in the license, --> This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License version 3 for more details. -> https://www.gnu.org/licenses/gpl-3.0.en.html

thx! i learned some markdown and edited my reply. Does it look good now?

multi directory syncing with src and/or dest for each input directory. u can sync as many directories, locally and remotely, ig as your ram can handle

u could read more about it in this reply

https://programming.dev/comment/9461693

i'm not familiar with rclone. I'm kinda familiar with rsync, but not much so excuse me if i got something wrong,

3 main things that are in lunas but not in rsync

• multi directory syncing with src and/or dest for each input directory

u can sync as many directories, locally and remotely, ig as your ram can handle

src input directories -> files are not synced to them, but they sync to other input directories

dest input directories -> files ARE synced to them, but they DON'T sync to other input directories

src+dest input directories -> they do both, files are synced to them, and from them to other input directories

lunas -p dir1 -p dir2 -p dir3 -p dir4 -p dir5 -r user@ip:dir6

all of these dirs should be the same at the end, since -p is src and dest at the same time, same for -r

• config file -> which many presets could be defined and used very conveniently " lunas -c preset_name"

path : ~/.config/lunas/lunas.conf

global{

    resume = on  # resume file syncing if it was interrupted

   progress = on # show progress bar for file syncing

   update = on # check for file mtimes and resync them based on mtime difference. Newer to old

   mkdir = on # make input directories if not there

   compression = on # in remote transfer, zlib is used

}

cool{

   p = /path/to/dir

   r = user@ip:/path/to/dir

   verbose = on

   attributes = atime

}

---

command > lunas -c cool

using this command lunas would load what's in the preset named "cool", and tries to sync the paths inside them and enable the options. And there is >the special preset called "global" which can always run while using -c preset, or normally using the cli "lunas -p dir -p dir2" this basically lets the user >defined their default options that make sense for them instead of rewriting them in the cli each time

btw lunas can load multiple presets at once

lunas -c cool -c other_preset -c etc

• sync removal -> to sync remove files from other directories

in case someone wanted to delete a directory or file and don't want them to be synced back to other backup directories for instance, or want them >removed, they could use sync removal. By default it acts as excluding, unless -cr Y is used, then it should remove them from other input directories, >if found

or --exclude can be used to exclude files without removing them, i'm thinking of maybe adding a .lunasignore file similar to .gitignore to make this >extra convenient

lunas doesn't have as many options as rsync, it still has many tho, u could take a quick look at both of them to compare if you want. But i'm still developing lunas and i wanna make it even more cooler, it's been like over 6 months since i started it, so hopefully more cool stuff come in the future