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/* Author: Makarius
File-system operations (see Pure/General/file.scala)
*/
'use strict';
import * as path from 'path'
import { readFile } from 'fs/promises'
import { readFileSync } from 'fs'
import { Buffer } from 'buffer'
import * as platform from './platform'
import * as library from './library'
/* Windows/Cygwin */
export function cygwin_root(): string
{
if (platform.is_windows()) {
return library.getenv_strict("CYGWIN_ROOT")
}
else { return "" }
}
export function cygwin_bash(): string
{
return cygwin_root() + "\\bin\\bash"
}
/* standard path (Cygwin or Posix) */
function slashes(s: string): string
{
return s.replace(/\\/g, "/")
}
export function standard_path(platform_path: string): string
{
if (platform.is_windows()) {
const backslashes = platform_path.replace(/\//g, "\\")
const root_pattern = new RegExp(library.escape_regex(cygwin_root()) + "(?:\\\\+|\\z)(.*)", "i")
const root_match = backslashes.match(root_pattern)
const drive_pattern = new RegExp("([a-zA-Z]):\\\\*(.*)")
const drive_match = backslashes.match(drive_pattern)
if (root_match) {
const rest = root_match[1]
return "/" + slashes(rest)
}
else if (drive_match) {
const letter = drive_match[1].toLowerCase()
const rest = drive_match[2]
return "/cygdrive/" + letter + (!rest ? "" : "/" + slashes(rest))
}
else { return slashes(backslashes) }
}
else { return platform_path }
}
/* platform path (Windows or Posix) */
export function platform_path(standard_path: string): string
{
var _result = []
function result(): string { return _result.join("") }
function clear(): void { _result = [] }
function add(s: string): void { _result.push(s) }
function separator(): void
{
const n = _result.length
if (n > 0 && _result[n - 1] !== path.sep) {
add(path.sep)
}
}
// check root
var rest = standard_path
const is_root = standard_path.startsWith("/")
if (platform.is_windows()) {
const cygdrive_pattern = new RegExp("/cygdrive/([a-zA-Z])($|/.*)")
const cygdrive_match = standard_path.match(cygdrive_pattern)
const named_root_pattern = new RegExp("//+([^/]*)(.*)")
const named_root_match = standard_path.match(named_root_pattern)
if (cygdrive_match) {
const drive = cygdrive_match[1].toUpperCase()
rest = cygdrive_match[2]
clear()
add(drive)
add(":")
add(path.sep)
}
else if (named_root_match) {
const root = named_root_match[1]
rest = named_root_match[2]
clear()
add(path.sep)
add(path.sep)
add(root)
}
else if (is_root) {
clear()
add(cygwin_root())
}
}
else if (is_root) {
clear()
add(path.sep)
}
// check rest
for (const p of rest.split("/")) {
if (p) {
separator()
add(p)
}
}
return result()
}
/* read */
export async function read_bytes(path: string): Promise<Buffer>
{
return readFile(platform_path(path))
}
export async function read(path: string): Promise<string>
{
return read_bytes(path).then(buffer => buffer.toString())
}
export async function read_json<T>(path: string): Promise<T>
{
return read(path).then(JSON.parse) as Promise<T>
}
export function read_bytes_sync(path: string): Buffer
{
return readFileSync(platform_path(path))
}
export function read_sync(path: string): string
{
return read_bytes_sync(path).toString()
}
export function read_json_sync<T>(path: string): T
{
return JSON.parse(read_sync(path))
}
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