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https://github.com/balena-io/balena-cli.git
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210680c9c9
In my system (MBPr 13), printing the current version takes over 2 seconds: ```sh $ time ./bin/resin version 2.4.0 ./bin/resin version 1.37s user 0.19s system 73% cpu 2.130 total ``` The CLI takes almost all of these time to parse the dependency tree before returning control over the actually called command. To mitigate this problem, we only require the NPM dependencies a command requires when executing such command, and thus prevent dependencies from being required and parsed unnecessary. After this improvement, printing the original example (`resin version`) returns in less than a second (2x improvement): ```sh $ time ./bin/resin version 2.4.0 ./bin/resin version 0.88s user 0.09s system 102% cpu 0.938 total ```
40 lines
1.6 KiB
JavaScript
40 lines
1.6 KiB
JavaScript
(function() {
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module.exports = {
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signature: 'logs <uuid>',
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description: 'show device logs',
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help: 'Use this command to show logs for a specific device.\n\nBy default, the command prints all log messages and exit.\n\nTo continuously stream output, and see new logs in real time, use the `--tail` option.\n\nNote that for now you need to provide the whole UUID for this command to work correctly.\n\nThis is due to some technical limitations that we plan to address soon.\n\nExamples:\n\n $ resin logs 23c73a12e3527df55c60b9ce647640c1b7da1b32d71e6a39849ac0f00db828\n $ resin logs 23c73a12e3527df55c60b9ce647640c1b7da1b32d71e6a39849ac0f00db828 --tail',
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options: [
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{
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signature: 'tail',
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description: 'continuously stream output',
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boolean: true,
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alias: 't'
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}
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],
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permission: 'user',
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primary: true,
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action: function(params, options, done) {
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var _, promise, resin;
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_ = require('lodash');
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resin = require('resin-sdk');
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promise = resin.logs.history(params.uuid).each(function(line) {
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return console.log(line.message);
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});
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if (!options.tail) {
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return promise["catch"](done)["finally"](function() {
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return process.exit(0);
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});
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}
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return promise.then(function() {
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return resin.logs.subscribe(params.uuid).then(function(logs) {
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logs.on('line', function(line) {
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return console.log(line.message);
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});
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return logs.on('error', done);
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});
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})["catch"](done);
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}
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};
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}).call(this);
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