1 | const {MAX_LENGTH} = require('../internal/constants')
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2 | const { re, t } = require('../internal/re')
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3 | const SemVer = require('../classes/semver')
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4 |
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5 | const parse = (version, options) => {
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6 | if (!options || typeof options !== 'object') {
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7 | options = {
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8 | loose: !!options,
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9 | includePrerelease: false
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10 | }
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11 | }
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12 |
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13 | if (version instanceof SemVer) {
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14 | return version
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15 | }
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16 |
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17 | if (typeof version !== 'string') {
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18 | return null
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19 | }
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20 |
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21 | if (version.length > MAX_LENGTH) {
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22 | return null
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23 | }
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24 |
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25 | const r = options.loose ? re[t.LOOSE] : re[t.FULL]
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26 | if (!r.test(version)) {
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27 | return null
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28 | }
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29 |
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30 | try {
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31 | return new SemVer(version, options)
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32 | } catch (er) {
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33 | return null
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34 | }
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35 | }
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36 |
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37 | module.exports = parse
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