mapperfs | simple userspace loopback filesystem

mapperfs is a Python library. mapperfs has no bugs, it has no vulnerabilities, it has a Strong Copyleft License and it has low support. However mapperfs build file is not available. You can download it from GitHub.

mapperfs is a read-only user-mounted filesystem (via FUSE) that simply exposes other existing files that you tell it to. You could achieve the same thing with hard links (if all your source files and your mount point are on one filesystem) or with symlinks (if you don't mind having symlinks instead of regular files), but mapperfs will update the filesystem when your input file changes, so you can mount it once and not have to maintain a bunch of links. It can be useful as-is if you have simple input files (I use it with GQView/Geeqie collections), or you can easily extend it to work with more complex input files. For example, rhythmboxfs exposes a single Rhythmbox playlist as a filesystem. (The order of the playlist is not conveyed, just the contents.).