37 lines
1.2 KiB
JavaScript
37 lines
1.2 KiB
JavaScript
const { readFileSync } = require('fs');
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const { execSync } = require('child_process');
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const findLastFromLineIndex = (lines) => lines.reduce((acc, line, index) => (
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line.startsWith('FROM') ? index : acc
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), 0);
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const getDockerfileImage = (file) => {
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const lines = readFileSync(file, { encoding: 'utf8' })
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.split('\n');
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const lastFromLine = lines[findLastFromLineIndex(lines)];
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return lastFromLine.split(' ')[1];
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};
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const getImageManifest = (image) => execSync(`docker manifest inspect ${image}`, {
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encoding: 'utf8',
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});
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const translateManifestPlatform = ({ os, architecture, variant }) => (variant
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? `${os}/${architecture}/${variant}`
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: `${os}/${architecture}`);
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const getImagePlatforms = (image) => JSON.parse(getImageManifest(image)).manifests
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.map(({ platform }) => translateManifestPlatform(platform));
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const getDockerfileArches = (file, supportedPlatformsStr) => {
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const basePlatforms = getImagePlatforms(getDockerfileImage(file));
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console.log('Base platforms: ', basePlatforms.join(', '));
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const supportedPlatforms = supportedPlatformsStr.split(',');
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return basePlatforms.filter(
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(platform) => supportedPlatforms.some((supPlatform) => platform.startsWith(supPlatform)),
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).join(',');
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}
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module.exports = getDockerfileArches;
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