mirror of https://github.com/renovatebot/renovate
93 lines
2.2 KiB
TypeScript
93 lines
2.2 KiB
TypeScript
// Return true if the match string is found at index in content
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export function matchAt(
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content: string,
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index: number,
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match: string,
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): boolean {
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return content.substring(index, index + match.length) === match;
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}
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// Replace oldString with newString at location index of content
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export function replaceAt(
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content: string,
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index: number,
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oldString: string,
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newString: string,
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): string {
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return (
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content.substring(0, index) +
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newString +
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content.substring(index + oldString.length)
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);
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}
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/**
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* Converts from utf-8 string to base64-encoded string
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*/
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export function toBase64(input: string): string {
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return Buffer.from(input).toString('base64');
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}
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/**
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* Converts from base64-encoded string to utf-8 string
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*/
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export function fromBase64(input: string): string {
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return Buffer.from(input, 'base64').toString();
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}
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export function uniqueStrings(
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element: string,
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index: number,
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elements: string[],
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): boolean {
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return elements.indexOf(element) === index;
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}
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export function looseEquals(
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a: string | null | undefined,
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b: string | null | undefined,
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): boolean {
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if (!(a && b)) {
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return a === b;
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}
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return a.localeCompare(b, undefined, { sensitivity: 'base' }) === 0;
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}
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export function titleCase(input: string): string {
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const words = input.toLowerCase().split(' ');
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for (let i = 0; i < words.length; i++) {
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const word = words[i];
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words[i] = word.charAt(0).toUpperCase() + word.slice(1).toLowerCase();
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}
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return words.join(' ');
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}
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/**
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* Sometimes we extract small strings from a multi-megabyte files.
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* If we then save them in the in-memory cache, V8 may not free
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* the initial buffer, which can lead to memory leaks:
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*
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* https://bugs.chromium.org/p/v8/issues/detail?id=2869
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*
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*/
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export function copystr(x: string): string {
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const len = Buffer.byteLength(x, 'utf8');
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const buf = Buffer.allocUnsafeSlow(len);
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buf.write(x, 'utf8');
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return buf.toString('utf8');
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}
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/**
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* Coerce a value to a string with optional default value.
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* @param val value to coerce
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* @returns the coerced value.
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*/
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export function coerceString(
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val: string | null | undefined,
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def?: string,
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): string {
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return val ?? def ?? '';
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}
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