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denoland-deno/std/fs/_util.ts
Linus Unnebäck 8228ea85fd
refactor(fs): use every instead of reduce (#5323)
The previous usage of `reduce` was basically implementing the `every`

A small difference is that the new implementation will stop checking 
as soon as one element have returned false, which will reduce 
the number of unnecessary checks.
2020-05-15 20:53:23 +02:00

38 lines
899 B
TypeScript

import * as path from "../path/mod.ts";
/**
* Test whether or not `dest` is a sub-directory of `src`
* @param src src file path
* @param dest dest file path
* @param sep path separator
*/
export function isSubdir(
src: string,
dest: string,
sep: string = path.sep
): boolean {
if (src === dest) {
return false;
}
const srcArray = src.split(sep);
const destArray = dest.split(sep);
return srcArray.every((current, i) => destArray[i] === current);
}
export type PathType = "file" | "dir" | "symlink";
/**
* Get a human readable file type string.
*
* @param fileInfo A FileInfo describes a file and is returned by `stat`,
* `lstat`
*/
export function getFileInfoType(fileInfo: Deno.FileInfo): PathType | undefined {
return fileInfo.isFile
? "file"
: fileInfo.isDirectory
? "dir"
: fileInfo.isSymlink
? "symlink"
: undefined;
}