A PURE Go library to read squashfs. There is currently no plans to add archive creation support as it will almost always be better to just call mksquashfs. I could see some possible use cases, but probably won't spend time on it unless it's requested (open a discussion fi you want this feature).
Currently has support for reading squashfs files and extracting files and folders.
Special thanks to https://dr-emann.github.io/squashfs/ for some VERY important information in an easy to understand format. Thanks also to distri's squashfs library as I referenced it to figure some things out (and double check others).
- No Xattr parsing. This is simply because I haven't done any research on it and how to apply these in a pure go way.
- Socket files are not extracted.
- From my research, it seems like a socket file would be useless if it could be created.
- Fifo files are ignored on
darwin
- Significantly slower then
unsquashfswhen extracting folders (about 5 ~ 7 times slower on a ~100MB archive using zstd compression)- This seems to be related to above along with the general optimization of
unsquashfsand it's compression libraries. - The larger the file's tree, the slower the extraction will be. Arch Linux's Live USB's airootfs.sfs takes ~35x longer for a full extraction.
- This seems to be related to above along with the general optimization of
Due to the above performance consideration, this library should only be used to access files within the archive without extraction, or to mount it via Fuse.
- Neither of these use cases are largely effected by the issue above.