1 | var check = require('check-types');
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2 |
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3 | function loadPackage() {
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4 | var filename = './package.json';
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5 | var fs = require('fs');
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6 | if (fs.existsSync(filename)) {
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7 | var txt = fs.readFileSync(filename, 'utf-8');
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8 | if (txt) {
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9 | return JSON.parse(txt);
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10 | }
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11 | }
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12 | }
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13 |
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14 | function saveOption(type) {
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15 | var saveCommands = {
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16 | dependencies: '--save --save-exact',
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17 | devDependencies: '--save-dev --save-exact',
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18 | peerDependencies: '--save-peer --save-exact'
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19 | };
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20 | return saveCommands[type];
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21 | }
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22 |
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23 | function splitByType(updates, pkg) {
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24 | check.verify.array(updates, 'expected array of updates');
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25 | check.verify.object(pkg, 'expected package object');
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26 |
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27 | var result = {
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28 | dependencies: [],
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29 | devDependencies: [],
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30 | peerDependencies: []
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31 | };
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32 |
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33 | updates.forEach(function (moduleList) {
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34 | if (!moduleList.length) {
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35 | return;
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36 | }
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37 | var moduleName = moduleList[0].name;
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38 | check.verify.string(moduleName, 'missing module name');
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39 | if (pkg.dependencies && pkg.dependencies[moduleName]) {
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40 | result.dependencies.push(moduleList);
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41 | } else if (pkg.devDependencies && pkg.devDependencies[moduleName]) {
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42 | result.devDependencies.push(moduleList);
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43 | } else if (pkg.peerDependencies && pkg.peerDependencies[moduleName]) {
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44 | result.peerDependencies.push(moduleList);
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45 | } else {
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46 | console.warn('Could not find dependency for', moduleName, 'assuming normal');
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47 | result.dependencies.push(moduleList);
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48 | }
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49 | });
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50 | return result;
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51 | }
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52 |
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53 | function installCommand(updates) {
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54 | check.verify.array(updates, 'expected array of updates');
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55 | if (!updates.length) {
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56 | return;
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57 | }
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58 |
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59 | var cmd = '';
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60 | var pkg = loadPackage();
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61 | if (!pkg) {
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62 |
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63 | cmd = installCommandType(updates, 'dependencies');
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64 | } else {
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65 |
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66 | var updatesByDependencyType = splitByType(updates, pkg);
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67 | console.assert(updatesByDependencyType, 'could not split updates by type');
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68 |
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69 |
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70 |
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71 | var depCmd = installCommandType(updatesByDependencyType.dependencies, 'dependencies');
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72 | var devCmd = installCommandType(updatesByDependencyType.devDependencies, 'devDependencies');
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73 | var peerCmd = installCommandType(updatesByDependencyType.peerDependencies,
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74 | 'peerDependencies');
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75 | if (depCmd) {
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76 | cmd += depCmd + '\n';
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77 | }
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78 | if (devCmd) {
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79 | cmd += devCmd + '\n';
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80 | }
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81 | if (peerCmd) {
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82 | cmd += peerCmd + '\n';
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83 | }
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84 | }
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85 | if (cmd) {
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86 | return cmd;
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87 | }
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88 | }
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89 |
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90 | function getLatestWorkingVersion(versions) {
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91 | check.verify.array(versions, 'expected array of versions');
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92 | var working;
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93 | versions.forEach(function (info) {
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94 | check.verify.string(info.name, 'missing package name ' + info);
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95 | if (info.works) {
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96 | working = info;
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97 | }
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98 | });
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99 |
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100 | return working;
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101 | }
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102 |
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103 | function setWorkingVersion(updates) {
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104 | updates.forEach(function (moduleVersions) {
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105 | moduleVersions.latestWorkingVersion = getLatestWorkingVersion(moduleVersions);
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106 | });
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107 | }
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108 |
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109 | function installCommandType(updates, type) {
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110 | check.verify.array(updates, 'expected array of updates');
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111 | if (!updates.length) {
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112 | return;
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113 | }
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114 | check.verify.string(type, 'missing type');
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115 |
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116 | var saveCommand = saveOption(type);
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117 | if (!saveCommand) {
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118 | throw new Error('invalid dependency type ' + type);
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119 | }
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120 |
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121 | setWorkingVersion(updates);
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122 |
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123 | var originalCmd, cmd;
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124 | originalCmd = cmd = 'npm install ' + saveCommand;
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125 | updates.forEach(function (moduleVersions) {
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126 | var latestWorkingVersion = moduleVersions.latestWorkingVersion;
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127 | if (latestWorkingVersion) {
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128 | cmd += ' ' + latestWorkingVersion.name + '@' + latestWorkingVersion.version;
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129 | }
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130 | });
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131 |
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132 | if (originalCmd === cmd) {
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133 | return;
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134 | }
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135 |
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136 | return cmd;
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137 | }
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138 |
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139 | module.exports = installCommand;
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