| 1 | const fs = require('fs');
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| 2 | const path = require('path');
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| 3 |
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| 4 | function findPackageJSON(curr) {
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| 5 | const parent = path.dirname(curr);
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| 6 | if (parent === curr || curr.length === 0) {
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| 7 | return null;
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| 8 | } else {
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| 9 | const pkg = path.join(curr, 'package.json');
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| 10 | if (fs.existsSync(pkg)) {
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| 11 | return {dir: curr, file: pkg};
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| 12 | } else {
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| 13 | return findPackageJSON(parent);
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| 14 | }
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| 15 | }
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| 16 | }
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| 17 |
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| 18 | function findRoot(curr) {
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| 19 | const pkg = findPackageJSON(curr);
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| 20 | if (pkg) {
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| 21 | try {
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| 22 | const meta = require(pkg.file);
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| 23 | if (meta.name) {
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| 24 | return {path: pkg.dir, meta: meta};
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| 25 | } else {
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| 26 | return findRoot(path.resolve(pkg.dir, '..'));
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| 27 | }
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| 28 | } catch (e) {
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| 29 | return findRoot(path.resolve(pkg.dir, '..'));
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| 30 | }
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| 31 | } else {
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| 32 | throw new Error(
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| 33 | 'Unable to locate project root directory. ' + 'Valid project-level package.json file not found.'
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| 34 | );
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| 35 | }
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| 36 | }
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| 37 |
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| 38 | module.exports = function(start) {
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| 39 | return findRoot(path.resolve(start || process.cwd()));
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| 40 | };
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