fix: regenerate antlr and fix devcontainer

Closes #119

Author: benbellick

.devcontainer/Dockerfile

@@ -1,10 +1,11 @@
 FROM mcr.microsoft.com/vscode/devcontainers/python:3.13
 USER vscode
+ENV HOME=/home/vscode
 RUN curl -s "https://get.sdkman.io" | bash
 SHELL ["/bin/bash", "-c"]
 RUN source "/home/vscode/.sdkman/bin/sdkman-init.sh" && sdk install java 25-graalce
 RUN mkdir -p ~/lib && cd ~/lib && curl -L -O http://www.antlr.org/download/antlr-4.13.2-complete.jar
-ENV ANTLR_JAR="~/lib/antlr-4.13.1-complete.jar"
+ENV ANTLR_JAR="${HOME}/lib/antlr-4.13.2-complete.jar"
 # protoc 29.5 is the last version with protobuf python v5 which is compatible with protoletariat v3
 RUN cd ~ && curl -LO https://github.com/protocolbuffers/protobuf/releases/download/v29.5/protoc-29.5-linux-x86_64.zip && \
     unzip protoc-29.5-linux-x86_64.zip -d ~/.local && \

.devcontainer/devcontainer.json

@@ -2,8 +2,7 @@
 	"name": "substrait-python-devcontainer",
 	"build": {
 		"context": "..",
-		"dockerfile": "Dockerfile",
-		"options": ["--format=docker"]
+		"dockerfile": "Dockerfile"
 	},
 
 	// Features to add to the dev container. More info: https://containers.dev/features.

README.md

@@ -17,6 +17,17 @@ pip install substrait
 conda install -c conda-forge python-substrait  # or use mamba
 ```
 
+## Development
+
+### Regenerating the ANTLR Parser
+
+The `make antlr` task regenerates the parser from the Substrait type grammar and requires ANTLR and Java to be installed. If you want to run this task with ANTLR already set up, use the dev container:
+
+```sh
+devcontainer up --workspace-folder .
+devcontainer exec --workspace-folder . make antlr
+```
+
 ## Goals
 This project aims to provide a Python interface for the Substrait specification. It will allow users to construct and manipulate a Substrait Plan from Python for evaluation by a Substrait consumer, such as DataFusion or DuckDB.