Function extractDockerfile

src/spec-node/dockerfileUtils.ts:56–82

(dockerfile: string)

}

export function extractDockerfile(dockerfile: string): Dockerfile {
	const fromStatementsAhead = /(?=^[\t ]*FROM)/gmi;
	const parts = dockerfile.split(fromStatementsAhead);
	const preambleStr = fromStatementsAhead.test(parts[0] || '') ? '' : parts.shift()!;
	const stageStrs = parts;
	const stages = stageStrs.map(stageStr => ({
		from: parseFromStatement(stageStr),
		instructions: extractInstructions(stageStr),
	}));
	const directives = extractDirectives(preambleStr);
	const versionMatch = directives.syntax && /^(?:docker.io\/)?docker\/dockerfile(?::(?<version>\S+))?/i.exec(directives.syntax) || undefined;
	const version = versionMatch && (versionMatch.groups?.version || 'latest');
	return {
		preamble: {
			version,
			directives,
			instructions: extractInstructions(preambleStr),
		},
		stages,
		stagesByLabel: stages.reduce((obj, stage) => {
			if (stage.from.label) {
				obj[stage.from.label] = stage;
			}
			return obj;
		}, {} as Record<string, Stage>),
	} as Dockerfile;
}

export function findUserStatement(dockerfile: Dockerfile, buildArgs: Record<string, string>, baseImageEnv: Record<string, string>, globalBuildxPlatformArgs: Record<string, string> = {}, target: string | undefined) {
	let stage: Stage | undefined = target ? dockerfile.stagesByLabel[target] : dockerfile.stages[dockerfile.stages.length - 1];