can we use Link in a read-only file system?

[rikedyp]

We can use Link inside dyalogscript by providing DYALOG_INITSESSION=1 config parameter (environment variable). However, initialising the session requires write access to some user folders by default.

Either:

• continue to use dyalogscript and see if there is a way to import Link at the top of the script
• use the runner as a .dws or linked project in the normal Dyalog interpreter

[ErikSchierboom]

We currently do not enforce a readonly file system, so you'd just need to modify the existing bash scripts to not enforce a readonly file system. We might want to enforce a readonly file system in the future, but you don't have to worry about it right now if it proves to be impossible to use a readonly file system.

[SleeplessByte]

Whilst readonly filesystem is not enforced, it does enforce non-executable file system, so YMMV trying to figure out a solution.

[jonocarroll]

Trying out the test runner docker image, perhaps the filesystem is currently set to read-only, causing issues...

$ ./bin/verify-exercises-in-docker hello-world
Using default tag: latest
latest: Pulling from exercism/dyalog-apl-test-runner
Digest: sha256:006f531b4580374476490973908a4c1c83b592d9449ffd2909a31de68fe68c27
Status: Image is up to date for exercism/dyalog-apl-test-runner:latest
docker.io/exercism/dyalog-apl-test-runner:latest
Verifying hello-world exercise...
WARNING: The requested image's platform (linux/amd64) does not match the detected host platform (linux/arm64/v8) and no specific platform was requested
Testing hello-world...
SALT initialization failed:  FILE ACCESS ERROR: /home/dyalog/.dyalog/: Unable to create directory ("Read-only file system")
  ResetUCMDcache[16] 3 ⎕MKDIR fol
                       ∧
 	not a dynamic executable
DOMAIN ERROR: Command interpreter returned failure code 1
CD[27] t←⎕SH'ldd /proc/',t,'/exe'
         ∧

[ErikSchierboom]

That's because by default we ship the repo with scripts that enforce a readonly file system. This nudges users towards at least trying to make it work for a readonly file system. But if that proves impossible the scripts can simply be changed to not use a readonly file system.