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Cache config env variables & check if config contains variables before substitution

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This commit is contained in:
shamoon 2023-02-23 09:51:28 -08:00
parent e0f1aae4d5
commit b2d22d7574
1 changed files with 27 additions and 12 deletions
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39
src/utils/config/config.js
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@ -2,8 +2,13 @@
import { join } from "path";
import { existsSync, copyFile, readFileSync } from "fs";
import cache from "memory-cache";
import yaml from "js-yaml";
const cacheKey = "homepageEnvironmentVariables";
const homepageVarPrefix = "HOMEPAGE_VAR_";
const homepageFilePrefix = "HOMEPAGE_FILE_";
export default function checkAndCopyConfig(config) {
const configYaml = join(process.cwd(), "config", config);
if (!existsSync(configYaml)) {
@ -27,20 +32,30 @@ export default function checkAndCopyConfig(config) {
}
}
export function substituteEnvironmentVars(str) {
const homepageVarPrefix = "HOMEPAGE_VAR_";
const homepageFilePrefix = "HOMEPAGE_FILE_";
function getCachedEnvironmentVars() {
let cachedVars = cache.get(cacheKey);
if (!cachedVars) {
// initialize cache
cachedVars = Object.entries(process.env).filter(([key, ]) => key.includes(homepageVarPrefix) || key.includes(homepageFilePrefix));
cache.put(cacheKey, cachedVars);
}
return cachedVars;
}
export function substituteEnvironmentVars(str) {
let result = str;
Object.keys(process.env).forEach(key => {
if (key.startsWith(homepageVarPrefix)) {
result = result.replaceAll(`{{${key}}}`, process.env[key]);
} else if (key.startsWith(homepageFilePrefix)) {
const filename = process.env[key];
const fileContents = readFileSync(filename, "utf8");
result = result.replaceAll(`{{${key}}}`, fileContents);
}
});
if (result.includes('{{')) { // crude check if we have vars to replace
const cachedVars = getCachedEnvironmentVars();
cachedVars.forEach(([key, value]) => {
if (key.startsWith(homepageVarPrefix)) {
result = result.replaceAll(`{{${key}}}`, value);
} else if (key.startsWith(homepageFilePrefix)) {
const filename = value;
const fileContents = readFileSync(filename, "utf8");
result = result.replaceAll(`{{${key}}}`, fileContents);
}
});
}
return result;
}