Pedagog

A platform for secure browser-based coding assignments.

Getting Started

See docs/SETUP.md for infrastructure setup instructions.

Development

Run once per clone to enable the git hooks (a pre-commit hook runs cargo clippy --workspace --all-targets -- -D warnings, rejecting commits with any warning — bypass with git commit --no-verify):

just install-hooks

Building & Running Assignments (Justfile)

The root Justfile wraps hammer (the recipe-resolution CLI) and podman to build and run assignment images locally.

Prerequisites

• just installed
• podman installed
• A recipes checkout (os/, platforms/, toolchains/), pointed to either by:
  • the HAMMER_RECIPES environment variable, or
  • the Justfile's RECIPES variable (just RECIPES=/path/to/recipes ...)

Variables

Override any of these on the command line, e.g. just PORT=3000 run ....

Variable	Default	Purpose
PORT	8080	Host/container port exposed by run/dev
WORKDIR	.	Host directory mounted to /workspace
REGISTRY	localhost	Image tag prefix; set to a real registry to push/pull from one
RECIPES	$HAMMER_RECIPES	Path to the recipes checkout
MEMORY	512m	Per-container memory limit (swap disabled)
CPUS	1	Per-container CPU limit
PIDS_LIMIT	256	Per-container process limit

Tasks

• just plan ASSIGNMENT — print the generated Containerfile for an assignment (e.g. just plan ../recipes/examples/pointers.yaml).
• just vend [FILTERS...] — download and cache recipe ingredients (e.g. the code-server .deb) into recipes/ingredients/, so builds use vendored assets instead of downloading at build time. Optional filters: --os/--platform/--toolchain <ID>.
• just build-base OS_ID IMAGE_TAG — build a base OS image from an OS recipe (e.g. just build-base ubuntu-22 pedagog/ubuntu:22). Run this once per OS recipe, or whenever the OS recipe changes.
• just build ASSIGNMENT — build an assignment's image, tagged <REGISTRY>/pedagog/<assignment-basename>.
• just squash ASSIGNMENT — squash an already-built assignment image's layers in place to reclaim space from files deleted during the build.
• just run ASSIGNMENT [ARGS...] — run a built assignment image: mounts WORKDIR to /workspace, exposes PORT, and applies the MEMORY/CPUS/PIDS_LIMIT caps.
• just dev ASSIGNMENT [ARGS...] — build then run in one step.

Typical workflow

# once per OS recipe
just build-base ubuntu-22 pedagog/ubuntu:22

# inspect what an assignment will build before running it
just plan ../recipes/examples/pointers.yaml

# build + run
just dev ../recipes/examples/pointers.yaml

# or separately
just build ../recipes/examples/pointers.yaml
just run ../recipes/examples/pointers.yaml

# optionally, after a build, reclaim space from deleted files
just squash ../recipes/examples/pointers.yaml