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In my OCaml project, I’d like to abstract away the details of running containers into specific modules based on the OS. Currently, I have working container setups for Windows and Linux, and I’ve haphazardly peppered if Sys.win32 then where I need differentiation, but this is OCaml, so let us use functors!
Everything was going fine until I ran out of disk space. My NVMe, C: drive, is only 256GB, but I have a large, 1.7TB SSD available as D:. How trivial, change a few paths and carry on, but it wasn’t that simple, or was it?
The opam2web image for opam.ocaml.org is huge weighing in at more than 25 GB. The bulk of this data is opam archives, which are updated and copied into a stock caddy image.
I have previously written about using a topological sort of a directed acyclic graph (DAG) of package dependencies to create an ordered list of installation operations. I now want to create a transitive reduction, giving a graph with the same vertices and the fewest number of edges possible.
While comfort-watching the indomitable Joan Hickson as Agatha Christie’s Miss Marple in The Body in the Library, it occurred to me that Miss Marple would have been a formidable debugger. Since returning from holiday one, two, three weeks ago, I’ve been mostly straightening out and finalising the final Relocatable OCaml PR. A frustrating task, because I know these things will take weeks and have little to show for at the end, so one spends the entire time feeling it should be finished by now. It’s just about there, when this little testsuite failure popped up: