Created
November 23, 2020 16:22
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Use lerna graph to build packages in topological order
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/* eslint-disable @typescript-eslint/no-var-requires */ | |
/** | |
* this script will list packages in topological order (dependencies before dependents) | |
* and execute the given command in sequence | |
* it will substitute any {package} found on the command by the actual package of the current cursor. | |
* We no longer trust lerna to build in topological order. | |
*/ | |
const {execSync} = require('child_process'); | |
const colors = require('colors'); | |
const rawCommand = process.argv[2]; | |
try { | |
const buffer = execSync(`npx lerna list --graph -a`); | |
const unformattedGraph = JSON.parse(buffer.toString()) | |
let graph = Object.keys(unformattedGraph).map((name) => ({ | |
name, | |
dependencies: unformattedGraph[name].filter(dep => Object.keys(unformattedGraph).includes(dep)) | |
})); | |
const pkgCount = graph.length; | |
const sorted = []; | |
/** in every iteration */ | |
while(graph.length && sorted.length < pkgCount) { | |
/** we add the packages without dependencies to the final list */ | |
const independentPackagesNames = graph.filter(pkg => !pkg.dependencies.length).map(pkg => pkg.name); | |
if (!independentPackagesNames.length) { | |
throw new Error(`in remaining graph a circular dependency is observed: ${JSON.stringify(graph, null, 2)}`); | |
} | |
sorted.push(...independentPackagesNames); | |
/** and remove them from the original graph */ | |
graph = graph.filter(pkg => pkg.dependencies.length); | |
/** and these packages are removed as dependencies of the remaining packages */ | |
graph.forEach(pkg => { | |
independentPackagesNames.forEach(independentPackageName => { | |
const index = pkg.dependencies.indexOf(independentPackageName); | |
if (index > -1) { | |
pkg.dependencies.splice(index, 1); | |
} | |
}); | |
}) | |
} | |
process.stdout.write(colors.green(`building ${sorted.length} packages sequentially in topological order`)+'\n'); | |
for (const package of sorted) { | |
const command = rawCommand.replace('{package}', package); | |
console.info(`running ${command}`); | |
try { | |
execSync(command, | |
{stdio: [process.stdin, process.stdout, process.stderr]}); | |
}catch(e) { | |
process.exit(1); | |
} | |
} | |
} catch (error) { | |
console.error(error); | |
process.exit(0) | |
} |
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