init

.devcontainer/devcontainer.json

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+{
+	"name": "CMPUT 325 W2023 ASP/CLPFD lab",
+	"build": {
+		"context": "..",
+		"dockerfile": "../Dockerfile"
+	},
+	"customizations": {
+		"vscode": {
+			"extensions": [
+				"rebornix.prolog",
+				"abelcour.asp-syntax-highlight",
+			]
+		}
+	}
+}

.vscode/settings.json

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+{
+    "files.associations": {
+        "*.pl": "prolog"
+    }
+}

Dockerfile

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+FROM ubuntu:jammy
+# rlwrap segfaulted on :kinetic, so using jammy instead
+LABEL maintainer="sjkillen@ualberta.ca"
+
+RUN apt-get -qq update
+RUN apt-get -qq install sudo gringo clasp time swi-prolog git
+RUN apt-get -qq install rlfe
+RUN echo "alias sbcl='rlfe sbcl'" >> /home/$USERNAME/.bashrc
+
+ARG USERNAME=user
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+
+# Copied from https://code.visualstudio.com/docs/remote/containers-advanced#_adding-a-nonroot-user-to-your-dev-container
+# Create the user
+RUN groupadd --gid $USER_GID $USERNAME \
+    && useradd --uid $USER_UID --gid $USER_GID -m $USERNAME --shell /bin/bash \
+    # [Optional] Add sudo support. Omit if you don't need to install software after connecting.
+    && echo $USERNAME ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME \
+    && chmod 0440 /etc/sudoers.d/$USERNAME
+
+USER $USERNAME

asp/1.lp

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+% Graph colouring
+
+%#show color/2.   
+
+%{ color(X,1..n) } = 1 :- vertex(X).
+%:- arc(X,Y), color(X,C), color(Y,C).