mirror of https://github.com/Lissy93/dashy.git
79 lines
2.7 KiB
JavaScript
79 lines
2.7 KiB
JavaScript
const fs = require('fs');
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const { exec } = require('child_process');
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const path = require('path');
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const crypto = require('crypto');
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// Default location of config file in container
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const configFileName = '../public/conf.yml';
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// Real path of config file in container
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const configFilePath = path.resolve(__dirname, configFileName);
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// Amount of time to ignore file after change detected
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const debounceTimeMs = 2000;
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// Store current timeout
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let timeout = null;
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// Store last hash of file
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let lastHash = null;
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/**
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* Calculate hash of file, used for de-bounce mechanism to
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* prevent successive updates if file content not changed
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*/
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const hashFileContent = (filePath) => {
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const content = fs.readFileSync(filePath, 'utf8');
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return crypto.createHash('sha256').update(content).digest('hex');
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};
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/**
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* Just logs a given message to terminal so user knows what's happening
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*/
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const logInfo = (message, msgLevel = 'OUTPUT') => {
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const RESET = '\x1b[0m';
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let logLevels = {};
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switch (msgLevel) {
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case 'ERROR': logLevels = { col: '\x1b[31m', func: console.error }; break;
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case 'WARNING': logLevels = { col: '\x1b[33m', func: console.warn }; break;
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case 'INFO': logLevels = { col: '\x1b[36m', func: console.info }; break;
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case 'SUCCESS': logLevels = { col: '\x1b[32m', func: console.log }; break;
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default: logLevels = { col: RESET, func: console.log };
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}
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logLevels.func(`${logLevels.col}\x1b[1m[${msgLevel}]${RESET} ${logLevels.col}${message}${RESET}\n`);
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};
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// Log initial message to user
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logInfo(`When '${configFileName}' is updated, a rebuild will be triggered.\n`);
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/**
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* Code to be executed when a watch event is triggered
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* Will check correctly expected file and time frame,
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* then ensure the hash is different from last hash,
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* and then trigger -rebuild of frontend with yarn build
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* outputting the stdrout and stderr to user's terminal
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*/
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const watchAction = (eventType, filename) => {
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if (filename && eventType === 'change') {
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if (timeout) clearTimeout(timeout);
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timeout = setTimeout(() => {
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const currentHash = hashFileContent(configFilePath);
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if (currentHash !== lastHash) {
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lastHash = currentHash;
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logInfo(`${filename} file Changed, running build...`);
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exec('yarn build', (error, stdout, stderr) => {
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if (error) {
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logInfo(error, 'ERROR');
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return;
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}
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logInfo(stdout);
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logInfo(stderr, 'WARNING');
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logInfo('Build completed successfully.\n', 'SUCCESS');
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});
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} else {
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logInfo(`${filename} file Detected change, but content is the same. Skipping....`, 'WARNING');
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}
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}, debounceTimeMs);
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}
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};
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// Watch given config path, with the watch action function
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fs.watch(configFilePath, watchAction);
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