proposed CLI interface:

swh [ -C config.yml ] graph mount PID DIR

will mount the content of the given PID to the given local DIR.

The config file will be used to specify:

• swh-graph API URL
• swh-storage instance (optional, to lookup additional metadata like file names, commit messages, et.c)

What to list will depend on the PID type, an initial proposal looks like this:

• cnt
  • file type: regular file
  • content: blob bytes
• dir
  • file type: directory
  • content: one FS directory entry per entry in the graph
  • if storage is available the real entry names can be shown; if not PIDs will be used
• rev
  • file type: directory (a-la /proc entries)
  • content: one dir entry root pointing to the root dir, plus a set of other dir entries for commit messages and other metadata (TODO to be further specified)
• rel
  • file type: directory (a-la /proc entries)
  • content: one dir entry target pointing to the release object target
• snp
  • file type: directory (a-la /proc entries)
  • content: one dir entry per branch, having (if storage is available) as name the branch name escaped (most notably to avoid / TODO or do we want to replicate branch names as local FS? it sounds both nice and confusing…) and as target the pointed object

Noting down that I had a tentative very preliminary implementation in the feature/fuse branch of swh-graph; see in particular fuse.py there.
It's probably no worth picking up and we should restart from scratch at this point, but might still contain useful material.
(The webclient in there has since become a proper thing, see T2279. So that part is definitely obsolete.)