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7 |
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8 | 'use strict';
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9 |
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10 | const fs = require('fs');
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11 | const os = require('os');
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12 | const path = require('path');
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13 | const ini = require('ini');
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14 | let prefix;
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15 |
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16 | const getPrefix = () => {
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17 | if (process.env.PREFIX) return process.env.PREFIX;
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18 | if (prefix) return prefix;
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19 |
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20 |
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21 | let home = os.homedir();
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22 |
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23 |
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24 | if (home) {
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25 | prefix = tryConfigPath(path.resolve(home, '.npmrc'));
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26 | }
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27 |
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28 | if (prefix) {
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29 | return prefix;
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30 | }
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31 |
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32 |
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33 | let npm = tryNpmPath();
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34 | if (npm) {
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35 |
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36 | prefix = tryConfigPath(path.resolve(npm, '..', '..', 'npmrc'));
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37 |
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38 | if (prefix) {
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39 |
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40 | prefix = tryConfigPath(path.resolve(prefix, 'etc', 'npmrc')) || prefix;
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41 | }
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42 | }
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43 |
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44 | if (!prefix) {
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45 | let { APPDATA, DESTDIR, OSTYPE } = process.env;
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46 |
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47 |
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48 | if (process.platform === 'win32' || OSTYPE === 'msys' || OSTYPE === 'cygwin') {
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49 | prefix = APPDATA ? path.join(APPDATA, 'npm') : path.dirname(process.execPath);
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50 | return prefix;
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51 | }
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52 |
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53 |
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54 | prefix = path.dirname(path.dirname(process.execPath));
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55 |
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56 |
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57 | if (DESTDIR) {
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58 | prefix = path.join(DESTDIR, prefix);
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59 | }
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60 | }
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61 |
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62 | return prefix;
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63 | }
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64 |
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65 | function tryNpmPath() {
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66 | try {
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67 | return fs.realpathSync(require('which').sync('npm'));
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68 | } catch (err) { }
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69 | }
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70 |
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71 | function tryConfigPath(configPath) {
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72 | try {
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73 | return ini.parse(fs.readFileSync(configPath, 'utf-8')).prefix;
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74 | } catch (err) { }
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75 | }
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76 |
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77 |
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78 |
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79 |
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80 |
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81 | Reflect.defineProperty(module, 'exports', {
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82 | get() {
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83 | return getPrefix();
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84 | }
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85 | });
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