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'use strict';
const path = require('path');
const fs = require('fs');
const testFiles = [
'genMatrix.js',
'.github/workflows/build-test.yml',
];
const nodeDirRegex = /^\d+$/;
const areTestFilesChanged = (changedFiles) => changedFiles
.some((file) => testFiles.includes(file));
// Returns a list of the child directories in the given path
const getChildDirectories = (parent) => fs.readdirSync(parent, { withFileTypes: true })
.filter((dirent) => dirent.isDirectory())
.map(({ name }) => path.resolve(parent, name));
const getNodeVerionDirs = (base) => getChildDirectories(base)
.filter((childPath) => nodeDirRegex.test(path.basename(childPath)));
// Returns the paths of Dockerfiles that are at: base/*/Dockerfile
const getDockerfilesInChildDirs = (base) => getChildDirectories(base)
.map((childDir) => path.resolve(childDir, 'Dockerfile'));
const getAllDockerfiles = (base) => getNodeVerionDirs(base).flatMap(getDockerfilesInChildDirs);
const getAffectedDockerfiles = (filesAdded, filesModified, filesRenamed) => {
const files = [
...filesAdded,
...filesModified,
...filesRenamed,
];
// If the test files were changed, include everything
if (areTestFilesChanged(files)) {
console.log('Test files changed so scheduling all Dockerfiles');
return getAllDockerfiles(__dirname);
}
const modifiedDockerfiles = files.filter((file) => file.endsWith('/Dockerfile'));
// Get Dockerfiles affected by modified docker-entrypoint.sh files
const entrypointAffectedDockerfiles = files
.filter((file) => file.endsWith('/docker-entrypoint.sh'))
.map((file) => path.resolve(path.dirname(file), 'Dockerfile'));
return [
...modifiedDockerfiles,
...entrypointAffectedDockerfiles,
];
};
const getFullNodeVersionFromDockerfile = (file) => fs.readFileSync(file, 'utf8')
.match(/^ENV NODE_VERSION=(\d*\.*\d*\.\d*)/m)[1];
const getDockerfileMatrixEntry = (file) => {
const [variant] = path.dirname(file).split(path.sep).slice(-1);
const version = getFullNodeVersionFromDockerfile(file);
return {
version,
variant,
};
};
const generateBuildMatrix = (filesAdded, filesModified, filesRenamed) => {
const dockerfiles = [...new Set(getAffectedDockerfiles(filesAdded, filesModified, filesRenamed))];
const entries = dockerfiles.map(getDockerfileMatrixEntry);
// Return null if there are no entries so we can skip the matrix step
return entries.length
? { include: entries }
: null;
};
module.exports = generateBuildMatrix;