| 1 | const fs = require('fs')
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| 2 | const { join } = require('path')
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| 3 | const spawn = require('cross-spawn').sync
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| 4 |
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| 5 | const { fatal } = require('./logger')
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| 6 |
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| 7 | function isInstalled (cmd) {
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| 8 | try {
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| 9 | return spawn(cmd, ['--version']).status === 0
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| 10 | }
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| 11 | catch (err) {
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| 12 | return false
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| 13 | }
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| 14 | }
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| 15 |
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| 16 | function getPackager (root) {
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| 17 | if (fs.existsSync(join(root, 'yarn.lock'))) {
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| 18 | return 'yarn'
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| 19 | }
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| 20 |
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| 21 | if (fs.existsSync(join(root, 'package-lock.json'))) {
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| 22 | return 'npm'
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| 23 | }
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| 24 |
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| 25 | if (isInstalled('yarn')) {
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| 26 | return 'yarn'
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| 27 | }
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| 28 |
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| 29 | if (isInstalled('npm')) {
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| 30 | return 'npm'
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| 31 | }
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| 32 |
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| 33 | fatal('⚠️ Please install Yarn or NPM before running this command.\n')
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| 34 | }
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| 35 |
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| 36 | module.exports = getPackager
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