itk-wasm/src/cli/find-oci-exe.js

High-performance spatial analysis in a web browser, Node.js, and reproducible execution across programming languages and hardware architectures.

import fs from 'fs'
import path from 'path'
import os from 'os'

import chalk from 'chalk'

import die from './die.js'

function findOciExe() {
  // Check for OCI_EXE environmental variable
  const ociExe = process.env.OCI_EXE
  if (ociExe && fs.existsSync(ociExe)) {
    return ociExe
  }

  // Get the PATH environment variable
  const PATH = process.env.PATH.split(path.delimiter)

  // Check for podman executable
  const podmanExe = os.platform() === 'win32' ? 'podman.exe' : 'podman'
  for (let p of PATH) {
    if (fs.existsSync(path.join(p, podmanExe))) {
      return podmanExe
    }
  }

  // Check for docker executable
  const dockerExe = os.platform() === 'win32' ? 'docker.exe' : 'docker'
  for (let p of PATH) {
    if (fs.existsSync(path.join(p, dockerExe))) {
      return dockerExe
    }
  }

  // If none of the above exist, die
  die(`${chalk.magenta(`Could not find podman or docker executable in the
    PATH or OCI_EXE environmental variables.`)}

${chalk.blue(`Please find installation instructions at:

    https://podman.io/docs/installation`)}

`)
}

export default findOciExe