container4container2wasm

This project provides a workflow to convert Docker images to WebAssembly (WASM) modules using the container2wasm tool. The conversion process is encapsulated in a Docker container, and the output files are copied to the local machine after the conversion is complete.

Prerequisites

• Docker
• Bash

Project Structure

.
├── Dockerfile
├── docker_entrypoint.sh
├── run_conversion.sh
└── src
    ├── example1
    │   ├── Dockerfile
    │   ├── arch
    │   └── target
    └── example2
        ├── image
        ├── arch
        └── target

• Dockerfile: Builds the Docker image with necessary dependencies.
• docker_entrypoint.sh: Entrypoint script that performs the Docker image to WASM conversion.
• run_conversion.sh: Bash script to automate the entire workflow.
• src: Directory containing source Dockerfiles or image references along with target architecture and target type files.

Usage

Step 1: Prepare the Source Directory

Ensure your src directory contains subdirectories for each conversion task. Each subdirectory should contain:

• Dockerfile or image file specifying the Docker image or Dockerfile to use.
• arch file specifying the target architecture (e.g., amd64).
• target file specifying the target compiler (wasi or emscripten).

Step 2: Run the Conversion Script

Execute the run_conversion.sh script to build the Docker image, run the container, perform the conversion, and copy the output files to the local out directory.

./run_conversion.sh

Step 3: Verify the Output

The output files will be copied to the out directory in your local machine. Each subdirectory in src will have a corresponding subdirectory in out with the converted WASM files.

Example

Assuming you have the following structure in your src directory:

src
├── example1
│   ├── Dockerfile 
│   ├── arch
│   └── target
└── example2
    ├── image
    ├── arch
    └── target

example1 uses a Dockerfile for building the image.
example2 uses a pre-built image specified in the image file.

Run the conversion script:

./run_conversion.sh

The output files will be copied to the out directory:

out
├── example1-container
│   ├── part-00.wasm
│   ├── part-01.wasm
│   └── ...
└── example2-container
    ├── part-00.wasm
    ├── part-01.wasm
    └── ...