code-runner

Overview

code-runner is a language-agnostic command line application that reads code as a JSON payload from stdin, runs the supplied build and run commands, and writes the result as json to stdout. This is used by glot-languages to run code on glot.io See the overview on how everything is connected.

Input (stdin)

The input is required to be a JSON object containing the properties runInstructions, files and stdin. files must be an array with at least one object containing the properties name and content. name is the name of the file and can include forward slashes to create the file in a subdirectory. File names must be unique, non-empty relative paths and cannot contain parent-directory components. Empty file content is allowed. All files are written into the same base directory under the OS's temp dir.

The caller is responsible for choosing non-empty commands appropriate for its runtime image.

Output (stdout)

The output is a JSON object containing the properties stdout, stderr, error and duration. stdout and stderr contain the captured process output, error is populated for compiler/interpreter failures, and duration is measured in nanoseconds.

Examples

Simple example

Input

{
  "runInstructions": {
    "buildCommands": [],
    "runCommand": "python main.py"
  },
  "files": [
    {
      "name": "main.py",
      "content": "print(42)"
    }
  ],
  "stdin": null
}

Output

{
  "stdout": "42\n",
  "stderr": "",
  "error": "",
  "duration": 123456
}

Read from stdin

Input

{
  "runInstructions": {
    "buildCommands": [],
    "runCommand": "python main.py"
  },
  "files": [
    {
      "name": "main.py",
      "content": "print(input('Number from stdin: '))"
    }
  ],
  "stdin": "42"
}

Output

{
  "stdout": "Number from stdin: 42\n",
  "stderr": "",
  "error": "",
  "duration": 123456
}