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Converting Dockerfile into a captain-definition file #214

dkimot opened this Issue Mar 30, 2018 · 1 comment


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dkimot commented Mar 30, 2018

I wrote a script that converts a Dockerfile into a captain-definition file and modifies every COPY line so it is compliant with CDD and the fact that it moves the source code into a src directory. I run it as a git pre-commit hook through NPM and thought I would post it here because automation is always nice.

const fs = require('fs');
const path = require('path');

const dockerfileLines = fs.readFileSync(path.join(__dirname, '..', 'Dockerfile')).toString().split('\n');

for (let i = 0; i < dockerfileLines.length; i += 1) {
  let line = dockerfileLines[i];
  if (line.indexOf('COPY .') === 0) {
    dockerfileLines[i] = line.replace('COPY .', 'COPY ./src');

const captainDefinition = JSON.stringify({
  schemaVersion: 1,

fs.writeFileSync(path.join(__dirname, '..', 'captain-definition'), captainDefinition);

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