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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,139 @@ | ||
| /* | ||
| * Original Source: https://github.com/inventage/envsubst/blob/main/src/utils.js | ||
| * MIT License | ||
| * Copyright (c) 2021 Inventage AG | ||
| * | ||
| * Copy this file, because | ||
| */ | ||
| import escapeStringRegexp from "escape-string-regexp"; | ||
| import { LooseObject } from "./util-common"; | ||
|
|
||
| const toLowerKeys = (object : LooseObject) => { | ||
| return Object.keys(object).reduce((accumulator : LooseObject, key) => { | ||
| accumulator[key.toLowerCase()] = object[key]; | ||
| return accumulator; | ||
| }, {}); | ||
| }; | ||
|
|
||
| /** | ||
| * Regex pattern with an optional prefix. | ||
| * | ||
| * @see https://regex101.com/r/M3dVAW/1 | ||
| * @param prefix | ||
| * @returns {string} | ||
| */ | ||
| const variableRegexPattern = (prefix = ""): string => { | ||
| return `\\\${(${prefix ? escapeStringRegexp(prefix) : ""}\\w+)(:-([^}]*))?}`; | ||
| }; | ||
|
|
||
| /** | ||
| * Regex pattern that wraps the variable regex pattern with a window variable statement: | ||
| * | ||
| * window['${VAR}'] or window["${VAR}"] | ||
| * | ||
| * @see https://regex101.com/r/ND057d/1 | ||
| * @param prefix | ||
| * @returns {string} | ||
| */ | ||
| const windowVariableRegexPattern = (prefix = ""): string => { | ||
| return `(window\\[['"]{1})?${variableRegexPattern(prefix)}(['"]{1}\\])?`; | ||
| }; | ||
|
|
||
| /** | ||
| * Replaces all variable placeholders in the given string with either variable values | ||
| * found in the variables parameter OR with the given default in the variable string. | ||
| * | ||
| * @param {string} string | ||
| * @param {object} variables | ||
| * @param {string} prefix | ||
| * @param {boolean} trimWindow | ||
| * @param {boolean} ignoreCase | ||
| * @returns {Promise<unknown[]>} | ||
| */ | ||
| const replaceVariables = (string: string, variables: object = {}, prefix: string = "", trimWindow: boolean = false, ignoreCase: boolean = false): Promise<unknown[]> => | ||
| new Promise(resolve => { | ||
| resolve(replaceVariablesSync(string, variables, prefix, trimWindow, ignoreCase)); | ||
| }); | ||
|
|
||
| /** | ||
| * Replaces all variable placeholders in the given string with either variable values | ||
| * found in the variables parameter OR with the given default in the variable string. | ||
| * | ||
| * @param {string} string | ||
| * @param {object} variables | ||
| * @param {string} prefix | ||
| * @param {boolean} trimWindow | ||
| * @param {boolean} ignoreCase | ||
| * @returns {unknown[]} | ||
| */ | ||
| const replaceVariablesSync = (string : string, variables: LooseObject = {}, prefix: string = "", trimWindow: boolean = false, ignoreCase: boolean = false): unknown[] => { | ||
| const regex = new RegExp(trimWindow ? windowVariableRegexPattern(prefix) : variableRegexPattern(prefix), ignoreCase ? "gmi" : "gm"); | ||
| const matches = [ ...string.matchAll(regex) ]; | ||
| const lowercaseVariables = toLowerKeys(variables); | ||
|
|
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| let replaced = string; | ||
| const replacements : LooseObject[] = []; | ||
| for (const match of matches) { | ||
| if (trimWindow) { | ||
| const [ original, windowStart, name, , fallback, windowEnd ] = match; | ||
|
|
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| // Bail if the match does not contain `^window[` | ||
| if (!windowStart) { | ||
| continue; | ||
| } | ||
|
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| const valueStartQuote = windowStart.replace("window[", ""); | ||
| const valueEndQuote = windowEnd.replace("]", ""); | ||
| const withoutWindow = original.replace(windowStart, "").replace(windowEnd, ""); | ||
|
|
||
| let value; | ||
| if (ignoreCase) { | ||
| value = Object.hasOwnProperty.call(lowercaseVariables || {}, name.toLowerCase()) ? lowercaseVariables[name.toLowerCase()] : fallback; | ||
| } else { | ||
| value = Object.hasOwnProperty.call(variables || {}, name) ? variables[name] : fallback; | ||
| } | ||
|
|
||
| if (value !== undefined) { | ||
| const quotedValue = `${valueStartQuote}${value}${valueEndQuote}`; | ||
| const replacement = replacements.find(r => r.from === original && r.to === quotedValue); | ||
| if (replacement) { | ||
| replacement.count = replacement.count + 1; | ||
| } else { | ||
| replacements.push({ from: original, | ||
| to: quotedValue, | ||
| count: 1 }); | ||
| } | ||
|
|
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| replaced = replaced.split(original).join(withoutWindow.split(withoutWindow).join(quotedValue)); | ||
| } | ||
| } else { | ||
| const [ original, name, , fallback ] = match; | ||
|
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| let value : string; | ||
| if (ignoreCase) { | ||
| value = Object.hasOwnProperty.call(lowercaseVariables || {}, name.toLowerCase()) ? lowercaseVariables[name.toLowerCase()] : fallback; | ||
| } else { | ||
| value = Object.hasOwnProperty.call(variables || {}, name) ? variables[name] : fallback; | ||
| } | ||
|
|
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| if (value !== undefined) { | ||
| const replacement = replacements.find(r => r.from === original && r.to === value); | ||
| if (replacement) { | ||
| replacement.count = replacement.count + 1; | ||
| } else { | ||
| replacements.push({ from: original, | ||
| to: value, | ||
| count: 1 }); | ||
| } | ||
|
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| replaced = replaced.split(original).join(value); | ||
| } | ||
| } | ||
| } | ||
|
|
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| return [ replaced, replacements ]; | ||
| }; | ||
|
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|
Check warning on line 137 in backend/envsubst.ts
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| export { variableRegexPattern, replaceVariables, replaceVariablesSync }; | ||
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