41 lines
1.0 KiB
JavaScript
41 lines
1.0 KiB
JavaScript
|
const throwError = require('./throw-error')
|
||
|
|
|
||
|
|
module.exports = function (name, deps) {
|
||
|
|
var i, len
|
||
|
|
var missing = []
|
||
|
|
if (typeof deps === 'string') {
|
||
|
|
deps = [deps]
|
||
|
|
}
|
||
|
|
for (i = 0, len = deps.length; i < len; i++) {
|
||
|
|
var mis
|
||
|
|
var req = deps[i]
|
||
|
|
if (typeof req === 'string') {
|
||
|
|
mis = req
|
||
|
|
} else {
|
||
|
|
mis = req[1]
|
||
|
|
req = req[0]
|
||
|
|
}
|
||
|
|
try {
|
||
|
|
// hack for babel-runtime because it does not expose "main" field
|
||
|
|
if (req === 'babel-runtime') {
|
||
|
|
req = 'babel-runtime/core-js'
|
||
|
|
}
|
||
|
|
require.resolve(req)
|
||
|
|
} catch (e) {
|
||
|
|
missing.push(mis)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (missing.length > 0) {
|
||
|
|
var message = 'You are trying to use "' + name + '". '
|
||
|
|
var npmInstall = 'npm install --save-dev ' + missing.join(' ')
|
||
|
|
if (missing.length > 1) {
|
||
|
|
var last = missing.pop()
|
||
|
|
message += missing.join(', ') + ' and ' + last + ' are '
|
||
|
|
} else {
|
||
|
|
message += missing[0] + ' is '
|
||
|
|
}
|
||
|
|
message += 'missing.\n\nTo install run:\n' + npmInstall
|
||
|
|
throwError(message)
|
||
|
|
}
|
||
|
|
}
|