Perl

Summary

Item	Value
API name	perl
source OCI image	alpine:3.22 + perl
per-job resource ceiling	1 vCPU, 512 MiB

The vCPU and RAM ceiling exists to prevent abuse; libkrun memory is elastic and the host only pays for what the guest touches.

Warmup

apk add perl: the base image does not ship Perl. The package is installed in the build VM and baked into the ext4. See Images.

How the code is executed

The main file (the first in files) is executed with perl <file>. With no network, CPAN modules are not installed; only what comes in Alpine's perl package is available. Everything runs in a directory under /tmp (tmpfs), in a fresh VM destroyed at the end of the job.

Building the image

rc image build --stack perl

Example

curl -s http://127.0.0.1:8080/api/v1/run \
  -H 'Content-Type: application/json' \
  -d '{
    "language": "perl",
    "files": [
      {"name": "main.pl", "content": "my $l = <STDIN>;\nchomp $l;\nprint scalar reverse($l), \"\\n\";\n"}
    ],
    "stdin": "abc"
  }'

Expected stdout: cba.