1 | var AWS = require( "aws-sdk" );
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2 | const fs = require( "fs" );
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3 | const _ = require( "lodash" );
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4 | const chalk = require( "chalk" );
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5 | const moment = require( "moment" );
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6 | var os = require( "os");
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7 |
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8 | const utils = require( "./utils" );
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9 |
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10 | const projectConfig = utils.getProjectConfig();
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11 |
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12 | AWS.config.region = projectConfig.region;
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13 |
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14 | function getLogName() {
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15 |
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16 | if ( process.env.COLLY__LAMBDA_NAME ) {
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17 | return `/aws/lambda/${utils.getLambdaName()}`;
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18 | }
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19 |
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20 | throw new Error("Unable to determine which log group name to use.");
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21 | }
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22 |
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23 | function getLogs() {
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24 |
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25 | return new Promise( ( resolve, reject ) => {
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26 |
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27 | const cloudwatchlogs = new AWS.CloudWatchLogs();
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28 |
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29 | const params = {
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30 | "logGroupName": getLogName(),
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31 | "descending": true,
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32 | "limit": 50,
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33 | "orderBy": "LastEventTime"
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34 | };
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35 |
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36 | cloudwatchlogs.describeLogStreams( params, function( err, data ) {
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37 |
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38 | if ( err ) {
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39 |
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40 | reject( err );
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41 |
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42 | } else {
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43 |
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44 | if ( data.logStreams.length === 0 ) {
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45 | reject( "No logs exist yet." );
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46 | }
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47 |
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48 | resolve(
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49 | _.chain( data.logStreams )
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50 |
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51 | .map( "logStreamName" )
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52 | .value()
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53 | );
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54 |
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55 | }
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56 |
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57 | });
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58 |
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59 | });
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60 |
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61 | }
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62 |
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63 | function formatLogEvent( msg ) {
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64 |
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65 | const dateFormat = "YYYY-MM-DD HH:mm:ss.SSS (Z)";
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66 |
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67 | if ( msg.startsWith( "REPORT" ) ) {
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68 | msg += os.EOL;
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69 | }
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70 |
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71 | if ( msg.startsWith( "START" ) || msg.startsWith( "END" ) || msg.startsWith( "REPORT" ) ) {
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72 |
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73 | return chalk.gray( msg );
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74 |
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75 | } else if ( msg.trim() === "Process exited before completing request" ) {
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76 |
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77 | return chalk.red(msg);
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78 |
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79 | }
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80 |
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81 | const splitted = msg.split( "\t" );
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82 |
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83 | if ( splitted.length < 3 || new Date( splitted[ 0 ] ) === "Invalid Date" ) {
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84 | return msg;
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85 | }
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86 |
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87 | const reqId = splitted[ 1 ];
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88 | const time = chalk.green( moment( splitted[ 0 ] ).format( dateFormat ) );
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89 | const text = msg.split( `${reqId}\t` )[ 1 ];
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90 |
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91 | return `${time}\t${chalk.yellow(reqId)}\t${text}\n\n`;
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92 |
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93 | };
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94 |
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95 | let startTime;
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96 |
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97 | function showLogs( logStreamNames ) {
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98 |
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99 | return new Promise( ( resolve, reject ) => {
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100 |
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101 | console.log( "Requesting logs..." );
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102 |
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103 | console.log( "logStreamNames.length: " + logStreamNames.length );
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104 |
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105 | const cloudwatchlogs = new AWS.CloudWatchLogs();
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106 |
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107 | const params = {
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108 | "logGroupName": getLogName(),
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109 | "interleaved": true,
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110 | "logStreamNames": logStreamNames
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111 | };
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112 |
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113 | if ( process.env.COLLY__SEARCH ) {
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114 | params.filterPattern = process.env.COLLY__SEARCH;
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115 | }
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116 |
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117 | if ( process.env.COLLY__START_TIME ) {
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118 |
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119 | startTime = process.env.COLLY__START_TIME;
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120 |
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121 | const since = ( [ "m", "h", "d" ].indexOf( startTime[ startTime.length - 1 ] ) !== -1 );
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122 |
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123 | if ( since ) {
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124 |
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125 | params.startTime = moment().subtract(
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126 | startTime.replace( /\D/g, ""),
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127 | startTime.replace( /\d/g, "")
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128 | ).valueOf();
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129 |
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130 | } else {
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131 |
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132 | params.startTime = moment.utc( startTime ).valueOf();
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133 |
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134 | }
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135 |
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136 | }
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137 |
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138 | cloudwatchlogs.filterLogEvents( params, function( err, data ) {
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139 |
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140 | if ( err ) {
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141 | reject( err );
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142 | return;
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143 | }
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144 | if ( data.events ) {
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145 | data.events.forEach( ( e ) => {
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146 |
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147 | process.stdout.write( formatLogEvent( e.message ) );
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148 |
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149 | });
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150 | }
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151 |
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152 |
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153 |
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154 | if ( process.env.COLLY__TAIL && ( data.events.length > 0) ) {
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155 |
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156 | startTime = data.events.pop().timestamp + 1;
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157 |
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158 | }
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159 |
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160 |
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161 |
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162 | const tail = JSON.parse( process.env.COLLY__TAIL );
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163 | if ( tail || data.nextToken ) {
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164 | setTimeout( () => {
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165 | showLogs( logStreamNames, ( data.nextToken || null ) );
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166 | }, 1000);
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167 | }
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168 |
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169 | resolve();
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170 |
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171 | });
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172 |
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173 | });
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174 |
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175 | }
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176 |
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177 | function init () {
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178 | utils.authenticate()
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179 | .then( getLogs )
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180 | .then( showLogs )
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181 | .catch( console.log );
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182 | }
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183 |
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184 | module.exports = {
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185 | "init": init
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186 | } |
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