forked from denoland/deno
/
lib.deno.ns.d.ts
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/
lib.deno.ns.d.ts
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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
/// <reference no-default-lib="true" />
/// <reference lib="esnext" />
declare namespace Deno {
/** The current process id of the runtime. */
export let pid: number;
/** Reflects the `NO_COLOR` environment variable.
*
* See: https://no-color.org/ */
export let noColor: boolean;
export interface TestDefinition {
fn: () => void | Promise<void>;
name: string;
ignore?: boolean;
/** Check that the number of async completed ops after the test is the same
* as number of dispatched ops. Defaults to true.*/
sanitizeOps?: boolean;
/** Ensure the test case does not "leak" resources - ie. the resource table
* after the test has exactly the same contents as before the test. Defaults
* to true. */
sanitizeResources?: boolean;
}
/** Register a test which will be run when `deno test` is used on the command
* line and the containing module looks like a test module.
* `fn` can be async if required.
*
* import {assert, fail, assertEquals} from "https://deno.land/std/testing/asserts.ts";
*
* Deno.test({
* name: "example test",
* fn(): void {
* assertEquals("world", "world");
* },
* });
*
* Deno.test({
* name: "example ignored test",
* ignore: Deno.build.os === "windows"
* fn(): void {
* // This test is ignored only on Windows machines
* },
* });
*
* Deno.test({
* name: "example async test",
* async fn() {
* const decoder = new TextDecoder("utf-8");
* const data = await Deno.readFile("hello_world.txt");
* assertEquals(decoder.decode(data), "Hello world")
* }
* });
*/
export function test(t: TestDefinition): void;
/** Register a test which will be run when `deno test` is used on the command
* line and the containing module looks like a test module.
* `fn` can be async if required.
*
* import {assert, fail, assertEquals} from "https://deno.land/std/testing/asserts.ts";
*
* Deno.test("My test description", ():void => {
* assertEquals("hello", "hello");
* });
*
* Deno.test("My async test description", async ():Promise<void> => {
* const decoder = new TextDecoder("utf-8");
* const data = await Deno.readFile("hello_world.txt");
* assertEquals(decoder.decode(data), "Hello world")
* });
* */
export function test(name: string, fn: () => void | Promise<void>): void;
/** Returns an array containing the 1, 5, and 15 minute load averages. The
* load average is a measure of CPU and IO utilization of the last one, five,
* and 15 minute periods expressed as a fractional number. Zero means there
* is no load. On Windows, the three values are always the same and represent
* the current load, not the 1, 5 and 15 minute load averages.
*
* console.log(Deno.loadavg()); // e.g. [ 0.71, 0.44, 0.44 ]
*
* Requires `allow-env` permission.
*
* **Unstable** There are questions around which permission this needs. And
* maybe should be renamed (loadAverage?)
*/
export function loadavg(): number[];
/** Get the `hostname` of the machine the Deno process is running on.
*
* console.log(Deno.hostname());
*
* Requires `allow-env` permission.
*/
export function hostname(): string;
/** Returns the release version of the Operating System.
*
* console.log(Deno.osRelease());
*
* Requires `allow-env` permission.
*
* **Unstable** new API maybe move to Deno.build or Deno.versions? Depends on
* sys-info, which we don't necessarally want to depend on.
*/
export function osRelease(): string;
/** Exit the Deno process with optional exit code. If no exit code is supplied
* then Deno will exit with return code of 0.
*
* Deno.exit(5);
*/
export function exit(code?: number): never;
export const env: {
/** Retrieve the value of an environment variable. Returns undefined if that
* key doesn't exist.
*
* console.log(Deno.env.get("HOME")); // e.g. outputs "/home/alice"
* console.log(Deno.env.get("MADE_UP_VAR")); // outputs "Undefined"
*
* Requires `allow-env` permission. */
get(key: string): string | undefined;
/** Set the value of an environment variable.
*
* Deno.env.set("SOME_VAR", "Value"));
* Deno.env.get("SOME_VAR"); // outputs "Value"
*
* Requires `allow-env` permission. */
set(key: string, value: string): void;
/** Returns a snapshot of the environment variables at invocation.
*
* Deno.env.set("TEST_VAR", "A");
* const myEnv = Deno.env.toObject();
* console.log(myEnv.SHELL);
* Deno.env.set("TEST_VAR", "B");
* console.log(myEnv.TEST_VAR); // outputs "A"
*
* Requires `allow-env` permission. */
toObject(): { [index: string]: string };
};
/** **UNSTABLE** */
export type DirKind =
| "home"
| "cache"
| "config"
| "executable"
| "data"
| "data_local"
| "audio"
| "desktop"
| "document"
| "download"
| "font"
| "picture"
| "public"
| "template"
| "tmp"
| "video";
/**
* **UNSTABLE**: Currently under evaluation to decide if method name `dir` and
* parameter type alias name `DirKind` should be renamed.
*
* Returns the user and platform specific directories.
*
* const homeDirectory = Deno.dir("home");
*
* Requires `allow-env` permission.
*
* Returns `null` if there is no applicable directory or if any other error
* occurs.
*
* Argument values: `"home"`, `"cache"`, `"config"`, `"executable"`, `"data"`,
* `"data_local"`, `"audio"`, `"desktop"`, `"document"`, `"download"`,
* `"font"`, `"picture"`, `"public"`, `"template"`, `"tmp"`, `"video"`
*
* `"home"`
*
* |Platform | Value | Example |
* | ------- | -----------------------------------------| -----------------------|
* | Linux | `$HOME` | /home/alice |
* | macOS | `$HOME` | /Users/alice |
* | Windows | `{FOLDERID_Profile}` | C:\Users\Alice |
*
* `"cache"`
*
* |Platform | Value | Example |
* | ------- | ----------------------------------- | ---------------------------- |
* | Linux | `$XDG_CACHE_HOME` or `$HOME`/.cache | /home/alice/.cache |
* | macOS | `$HOME`/Library/Caches | /Users/Alice/Library/Caches |
* | Windows | `{FOLDERID_LocalAppData}` | C:\Users\Alice\AppData\Local |
*
* `"config"`
*
* |Platform | Value | Example |
* | ------- | ------------------------------------- | -------------------------------- |
* | Linux | `$XDG_CONFIG_HOME` or `$HOME`/.config | /home/alice/.config |
* | macOS | `$HOME`/Library/Preferences | /Users/Alice/Library/Preferences |
* | Windows | `{FOLDERID_RoamingAppData}` | C:\Users\Alice\AppData\Roaming |
*
* `"executable"`
*
* |Platform | Value | Example |
* | ------- | --------------------------------------------------------------- | -----------------------|
* | Linux | `XDG_BIN_HOME` or `$XDG_DATA_HOME`/../bin or `$HOME`/.local/bin | /home/alice/.local/bin |
* | macOS | - | - |
* | Windows | - | - |
*
* `"data"`
*
* |Platform | Value | Example |
* | ------- | ---------------------------------------- | ---------------------------------------- |
* | Linux | `$XDG_DATA_HOME` or `$HOME`/.local/share | /home/alice/.local/share |
* | macOS | `$HOME`/Library/Application Support | /Users/Alice/Library/Application Support |
* | Windows | `{FOLDERID_RoamingAppData}` | C:\Users\Alice\AppData\Roaming |
*
* `"data_local"`
*
* |Platform | Value | Example |
* | ------- | ---------------------------------------- | ---------------------------------------- |
* | Linux | `$XDG_DATA_HOME` or `$HOME`/.local/share | /home/alice/.local/share |
* | macOS | `$HOME`/Library/Application Support | /Users/Alice/Library/Application Support |
* | Windows | `{FOLDERID_LocalAppData}` | C:\Users\Alice\AppData\Local |
*
* `"audio"`
*
* |Platform | Value | Example |
* | ------- | ------------------ | -------------------- |
* | Linux | `XDG_MUSIC_DIR` | /home/alice/Music |
* | macOS | `$HOME`/Music | /Users/Alice/Music |
* | Windows | `{FOLDERID_Music}` | C:\Users\Alice\Music |
*
* `"desktop"`
*
* |Platform | Value | Example |
* | ------- | -------------------- | ---------------------- |
* | Linux | `XDG_DESKTOP_DIR` | /home/alice/Desktop |
* | macOS | `$HOME`/Desktop | /Users/Alice/Desktop |
* | Windows | `{FOLDERID_Desktop}` | C:\Users\Alice\Desktop |
*
* `"document"`
*
* |Platform | Value | Example |
* | ------- | ---------------------- | ------------------------ |
* | Linux | `XDG_DOCUMENTS_DIR` | /home/alice/Documents |
* | macOS | `$HOME`/Documents | /Users/Alice/Documents |
* | Windows | `{FOLDERID_Documents}` | C:\Users\Alice\Documents |
*
* `"download"`
*
* |Platform | Value | Example |
* | ------- | ---------------------- | ------------------------ |
* | Linux | `XDG_DOWNLOAD_DIR` | /home/alice/Downloads |
* | macOS | `$HOME`/Downloads | /Users/Alice/Downloads |
* | Windows | `{FOLDERID_Downloads}` | C:\Users\Alice\Downloads |
*
* `"font"`
*
* |Platform | Value | Example |
* | ------- | ---------------------------------------------------- | ------------------------------ |
* | Linux | `$XDG_DATA_HOME`/fonts or `$HOME`/.local/share/fonts | /home/alice/.local/share/fonts |
* | macOS | `$HOME/Library/Fonts` | /Users/Alice/Library/Fonts |
* | Windows | – | – |
*
* `"picture"`
*
* |Platform | Value | Example |
* | ------- | --------------------- | ----------------------- |
* | Linux | `XDG_PICTURES_DIR` | /home/alice/Pictures |
* | macOS | `$HOME`/Pictures | /Users/Alice/Pictures |
* | Windows | `{FOLDERID_Pictures}` | C:\Users\Alice\Pictures |
*
* `"public"`
*
* |Platform | Value | Example |
* | ------- | --------------------- | ------------------- |
* | Linux | `XDG_PUBLICSHARE_DIR` | /home/alice/Public |
* | macOS | `$HOME`/Public | /Users/Alice/Public |
* | Windows | `{FOLDERID_Public}` | C:\Users\Public |
*
* `"template"`
*
* |Platform | Value | Example |
* | ------- | ---------------------- | ---------------------------------------------------------- |
* | Linux | `XDG_TEMPLATES_DIR` | /home/alice/Templates |
* | macOS | – | – |
* | Windows | `{FOLDERID_Templates}` | C:\Users\Alice\AppData\Roaming\Microsoft\Windows\Templates |
*
* `"tmp"`
*
* |Platform | Value | Example |
* | ------- | ---------------------- | ---------------------------------------------------------- |
* | Linux | `TMPDIR` | /tmp |
* | macOS | `TMPDIR` | /tmp |
* | Windows | `{TMP}` | C:\Users\Alice\AppData\Local\Temp |
*
* `"video"`
*
* |Platform | Value | Example |
* | ------- | ------------------- | --------------------- |
* | Linux | `XDG_VIDEOS_DIR` | /home/alice/Videos |
* | macOS | `$HOME`/Movies | /Users/Alice/Movies |
* | Windows | `{FOLDERID_Videos}` | C:\Users\Alice\Videos |
*
*/
export function dir(kind: DirKind): string | null;
/**
* Returns the path to the current deno executable.
*
* console.log(Deno.execPath()); // e.g. "/home/alice/.local/bin/deno"
*
* Requires `allow-env` permission.
*/
export function execPath(): string;
/**
* **UNSTABLE**: Currently under evaluation to decide if explicit permission is
* required to get the value of the current working directory.
*
* Return a string representing the current working directory.
*
* If the current directory can be reached via multiple paths (due to symbolic
* links), `cwd()` may return any one of them.
*
* const currentWorkingDirectory = Deno.cwd();
*
* Throws `Deno.errors.NotFound` if directory not available.
*/
export function cwd(): string;
/**
* Change the current working directory to the specified path.
*
* Deno.chdir("/home/userA");
* Deno.chdir("../userB");
* Deno.chdir("C:\\Program Files (x86)\\Java");
*
* Throws `Deno.errors.NotFound` if directory not found.
* Throws `Deno.errors.PermissionDenied` if the user does not have access
* rights
*
* Requires --allow-write.
*/
export function chdir(directory: string): void;
/**
* **UNSTABLE**: New API, yet to be vetted. This API is under consideration to
* determine if permissions are required to call it.
*
* Retrieve the process umask. If `mask` is provided, sets the process umask.
* This call always returns what the umask was before the call.
*
* console.log(Deno.umask()); // e.g. 18 (0o022)
* const prevUmaskValue = Deno.umask(0o077); // e.g. 18 (0o022)
* console.log(Deno.umask()); // e.g. 63 (0o077)
*
* NOTE: This API is not implemented on Windows
*/
export function umask(mask?: number): number;
export enum SeekMode {
Start = 0,
Current = 1,
End = 2,
}
export interface Reader {
/** Reads up to `p.byteLength` bytes into `p`. It resolves to the number of
* bytes read (`0` < `n` <= `p.byteLength`) and rejects if any error
* encountered. Even if `read()` resolves to `n` < `p.byteLength`, it may
* use all of `p` as scratch space during the call. If some data is
* available but not `p.byteLength` bytes, `read()` conventionally resolves
* to what is available instead of waiting for more.
*
* When `read()` encounters end-of-file condition, it resolves to EOF
* (`null`).
*
* When `read()` encounters an error, it rejects with an error.
*
* Callers should always process the `n` > `0` bytes returned before
* considering the EOF (`null`). Doing so correctly handles I/O errors that
* happen after reading some bytes and also both of the allowed EOF
* behaviors.
*
* Implementations should not retain a reference to `p`.
*
* Use Deno.iter() to turn a Reader into an AsyncIterator.
*/
read(p: Uint8Array): Promise<number | null>;
}
export interface ReaderSync {
/** Reads up to `p.byteLength` bytes into `p`. It resolves to the number
* of bytes read (`0` < `n` <= `p.byteLength`) and rejects if any error
* encountered. Even if `read()` returns `n` < `p.byteLength`, it may use
* all of `p` as scratch space during the call. If some data is available
* but not `p.byteLength` bytes, `read()` conventionally returns what is
* available instead of waiting for more.
*
* When `readSync()` encounters end-of-file condition, it returns EOF
* (`null`).
*
* When `readSync()` encounters an error, it throws with an error.
*
* Callers should always process the `n` > `0` bytes returned before
* considering the EOF (`null`). Doing so correctly handles I/O errors that happen
* after reading some bytes and also both of the allowed EOF behaviors.
*
* Implementations should not retain a reference to `p`.
*
* Use Deno.iterSync() to turn a ReaderSync into an Iterator.
*/
readSync(p: Uint8Array): number | null;
}
export interface Writer {
/** Writes `p.byteLength` bytes from `p` to the underlying data stream. It
* resolves to the number of bytes written from `p` (`0` <= `n` <=
* `p.byteLength`) or reject with the error encountered that caused the
* write to stop early. `write()` must reject with a non-null error if
* would resolve to `n` < `p.byteLength`. `write()` must not modify the
* slice data, even temporarily.
*
* Implementations should not retain a reference to `p`.
*/
write(p: Uint8Array): Promise<number>;
}
export interface WriterSync {
/** Writes `p.byteLength` bytes from `p` to the underlying data
* stream. It returns the number of bytes written from `p` (`0` <= `n`
* <= `p.byteLength`) and any error encountered that caused the write to
* stop early. `writeSync()` must throw a non-null error if it returns `n` <
* `p.byteLength`. `writeSync()` must not modify the slice data, even
* temporarily.
*
* Implementations should not retain a reference to `p`.
*/
writeSync(p: Uint8Array): number;
}
export interface Closer {
close(): void;
}
export interface Seeker {
/** Seek sets the offset for the next `read()` or `write()` to offset,
* interpreted according to `whence`: `Start` means relative to the
* start of the file, `Current` means relative to the current offset,
* and `End` means relative to the end. Seek resolves to the new offset
* relative to the start of the file.
*
* Seeking to an offset before the start of the file is an error. Seeking to
* any positive offset is legal, but the behavior of subsequent I/O
* operations on the underlying object is implementation-dependent.
* It returns the number of cursor position.
*/
seek(offset: number, whence: SeekMode): Promise<number>;
}
export interface SeekerSync {
/** Seek sets the offset for the next `readSync()` or `writeSync()` to
* offset, interpreted according to `whence`: `Start` means relative
* to the start of the file, `Current` means relative to the current
* offset, and `End` means relative to the end.
*
* Seeking to an offset before the start of the file is an error. Seeking to
* any positive offset is legal, but the behavior of subsequent I/O
* operations on the underlying object is implementation-dependent.
*/
seekSync(offset: number, whence: SeekMode): number;
}
/** Copies from `src` to `dst` until either EOF (`null`) is read from `src` or
* an error occurs. It resolves to the number of bytes copied or rejects with
* the first error encountered while copying.
*
* const source = await Deno.open("my_file.txt");
* const buffer = new Deno.Buffer()
* const bytesCopied1 = await Deno.copy(source, Deno.stdout);
* const bytesCopied2 = await Deno.copy(source, buffer);
*
* @param src The source to copy from
* @param dst The destination to copy to
* @param options Can be used to tune size of the buffer. Default size is 32kB
*/
export function copy(
src: Reader,
dst: Writer,
options?: {
bufSize?: number;
}
): Promise<number>;
/** Turns a Reader, `r`, into an async iterator.
*
* let f = await Deno.open("/etc/passwd");
* for await (const chunk of Deno.iter(f)) {
* console.log(chunk);
* }
* f.close();
*
* Second argument can be used to tune size of a buffer.
* Default size of the buffer is 32kB.
*
* let f = await Deno.open("/etc/passwd");
* const iter = Deno.iter(f, {
* bufSize: 1024 * 1024
* });
* for await (const chunk of iter) {
* console.log(chunk);
* }
* f.close();
*
* Iterator uses an internal buffer of fixed size for efficiency; it returns
* a view on that buffer on each iteration. It is therefore caller's
* responsibility to copy contents of the buffer if needed; otherwise the
* next iteration will overwrite contents of previously returned chunk.
*/
export function iter(
r: Reader,
options?: {
bufSize?: number;
}
): AsyncIterableIterator<Uint8Array>;
/** Turns a ReaderSync, `r`, into an iterator.
*
* let f = Deno.openSync("/etc/passwd");
* for (const chunk of Deno.iterSync(reader)) {
* console.log(chunk);
* }
* f.close();
*
* Second argument can be used to tune size of a buffer.
* Default size of the buffer is 32kB.
*
* let f = await Deno.open("/etc/passwd");
* const iter = Deno.iterSync(f, {
* bufSize: 1024 * 1024
* });
* for (const chunk of iter) {
* console.log(chunk);
* }
* f.close();
*
* Iterator uses an internal buffer of fixed size for efficiency; it returns
* a view on that buffer on each iteration. It is therefore caller's
* responsibility to copy contents of the buffer if needed; otherwise the
* next iteration will overwrite contents of previously returned chunk.
*/
export function iterSync(
r: ReaderSync,
options?: {
bufSize?: number;
}
): IterableIterator<Uint8Array>;
/** Synchronously open a file and return an instance of `Deno.File`. The
* file does not need to previously exist if using the `create` or `createNew`
* open options. It is the callers responsibility to close the file when finished
* with it.
*
* const file = Deno.openSync("/foo/bar.txt", { read: true, write: true });
* // Do work with file
* Deno.close(file.rid);
*
* Requires `allow-read` and/or `allow-write` permissions depending on options.
*/
export function openSync(path: string, options?: OpenOptions): File;
/** Open a file and resolve to an instance of `Deno.File`. The
* file does not need to previously exist if using the `create` or `createNew`
* open options. It is the callers responsibility to close the file when finished
* with it.
*
* const file = await Deno.open("/foo/bar.txt", { read: true, write: true });
* // Do work with file
* Deno.close(file.rid);
*
* Requires `allow-read` and/or `allow-write` permissions depending on options.
*/
export function open(path: string, options?: OpenOptions): Promise<File>;
/** Creates a file if none exists or truncates an existing file and returns
* an instance of `Deno.File`.
*
* const file = Deno.createSync("/foo/bar.txt");
*
* Requires `allow-read` and `allow-write` permissions.
*/
export function createSync(path: string): File;
/** Creates a file if none exists or truncates an existing file and resolves to
* an instance of `Deno.File`.
*
* const file = await Deno.create("/foo/bar.txt");
*
* Requires `allow-read` and `allow-write` permissions.
*/
export function create(path: string): Promise<File>;
/** Synchronously read from a resource ID (`rid`) into an array buffer (`buffer`).
*
* Returns either the number of bytes read during the operation or EOF
* (`null`) if there was nothing more to read.
*
* It is possible for a read to successfully return with `0` bytes. This does
* not indicate EOF.
*
* // if "/foo/bar.txt" contains the text "hello world":
* const file = Deno.openSync("/foo/bar.txt");
* const buf = new Uint8Array(100);
* const numberOfBytesRead = Deno.readSync(file.rid, buf); // 11 bytes
* const text = new TextDecoder().decode(buf); // "hello world"
* Deno.close(file.rid);
*/
export function readSync(rid: number, buffer: Uint8Array): number | null;
/** Read from a resource ID (`rid`) into an array buffer (`buffer`).
*
* Resolves to either the number of bytes read during the operation or EOF
* (`null`) if there was nothing more to read.
*
* It is possible for a read to successfully return with `0` bytes. This does
* not indicate EOF.
*
* // if "/foo/bar.txt" contains the text "hello world":
* const file = await Deno.open("/foo/bar.txt");
* const buf = new Uint8Array(100);
* const numberOfBytesRead = await Deno.read(file.rid, buf); // 11 bytes
* const text = new TextDecoder().decode(buf); // "hello world"
* Deno.close(file.rid);
*/
export function read(rid: number, buffer: Uint8Array): Promise<number | null>;
/** Synchronously write to the resource ID (`rid`) the contents of the array
* buffer (`data`).
*
* Returns the number of bytes written.
*
* const encoder = new TextEncoder();
* const data = encoder.encode("Hello world");
* const file = Deno.openSync("/foo/bar.txt");
* const bytesWritten = Deno.writeSync(file.rid, data); // 11
* Deno.close(file.rid);
*/
export function writeSync(rid: number, data: Uint8Array): number;
/** Write to the resource ID (`rid`) the contents of the array buffer (`data`).
*
* Resolves to the number of bytes written.
*
* const encoder = new TextEncoder();
* const data = encoder.encode("Hello world");
* const file = await Deno.open("/foo/bar.txt");
* const bytesWritten = await Deno.write(file.rid, data); // 11
* Deno.close(file.rid);
*/
export function write(rid: number, data: Uint8Array): Promise<number>;
/** Synchronously seek a resource ID (`rid`) to the given `offset` under mode
* given by `whence`. The new position within the resource (bytes from the
* start) is returned.
*
* const file = Deno.openSync('hello.txt', {read: true, write: true, truncate: true, create: true});
* Deno.writeSync(file.rid, new TextEncoder().encode("Hello world"));
* // advance cursor 6 bytes
* const cursorPosition = Deno.seekSync(file.rid, 6, Deno.SeekMode.Start);
* console.log(cursorPosition); // 6
* const buf = new Uint8Array(100);
* file.readSync(buf);
* console.log(new TextDecoder().decode(buf)); // "world"
*
* The seek modes work as follows:
*
* // Given file.rid pointing to file with "Hello world", which is 11 bytes long:
* // Seek 6 bytes from the start of the file
* console.log(Deno.seekSync(file.rid, 6, Deno.SeekMode.Start)); // "6"
* // Seek 2 more bytes from the current position
* console.log(Deno.seekSync(file.rid, 2, Deno.SeekMode.Current)); // "8"
* // Seek backwards 2 bytes from the end of the file
* console.log(Deno.seekSync(file.rid, -2, Deno.SeekMode.End)); // "9" (e.g. 11-2)
*/
export function seekSync(
rid: number,
offset: number,
whence: SeekMode
): number;
/** Seek a resource ID (`rid`) to the given `offset` under mode given by `whence`.
* The call resolves to the new position within the resource (bytes from the start).
*
* const file = await Deno.open('hello.txt', {read: true, write: true, truncate: true, create: true});
* await Deno.write(file.rid, new TextEncoder().encode("Hello world"));
* // advance cursor 6 bytes
* const cursorPosition = await Deno.seek(file.rid, 6, Deno.SeekMode.Start);
* console.log(cursorPosition); // 6
* const buf = new Uint8Array(100);
* await file.read(buf);
* console.log(new TextDecoder().decode(buf)); // "world"
*
* The seek modes work as follows:
*
* // Given file.rid pointing to file with "Hello world", which is 11 bytes long:
* // Seek 6 bytes from the start of the file
* console.log(await Deno.seek(file.rid, 6, Deno.SeekMode.Start)); // "6"
* // Seek 2 more bytes from the current position
* console.log(await Deno.seek(file.rid, 2, Deno.SeekMode.Current)); // "8"
* // Seek backwards 2 bytes from the end of the file
* console.log(await Deno.seek(file.rid, -2, Deno.SeekMode.End)); // "9" (e.g. 11-2)
*/
export function seek(
rid: number,
offset: number,
whence: SeekMode
): Promise<number>;
/** Close the given resource ID (rid) which has been previously opened, such
* as via opening or creating a file. Closing a file when you are finished
* with it is important to avoid leaking resources.
*
* const file = await Deno.open("my_file.txt");
* // do work with "file" object
* Deno.close(file.rid);
*/
export function close(rid: number): void;
/** The Deno abstraction for reading and writing files. */
export class File
implements
Reader,
ReaderSync,
Writer,
WriterSync,
Seeker,
SeekerSync,
Closer {
readonly rid: number;
constructor(rid: number);
write(p: Uint8Array): Promise<number>;
writeSync(p: Uint8Array): number;
read(p: Uint8Array): Promise<number | null>;
readSync(p: Uint8Array): number | null;
seek(offset: number, whence: SeekMode): Promise<number>;
seekSync(offset: number, whence: SeekMode): number;
close(): void;
}
/** A handle for `stdin`. */
export const stdin: Reader & ReaderSync & Closer & { rid: number };
/** A handle for `stdout`. */
export const stdout: Writer & WriterSync & Closer & { rid: number };
/** A handle for `stderr`. */
export const stderr: Writer & WriterSync & Closer & { rid: number };
export interface OpenOptions {
/** Sets the option for read access. This option, when `true`, means that the
* file should be read-able if opened. */
read?: boolean;
/** Sets the option for write access. This option, when `true`, means that
* the file should be write-able if opened. If the file already exists,
* any write calls on it will overwrite its contents, by default without
* truncating it. */
write?: boolean;
/**Sets the option for the append mode. This option, when `true`, means that
* writes will append to a file instead of overwriting previous contents.
* Note that setting `{ write: true, append: true }` has the same effect as
* setting only `{ append: true }`. */
append?: boolean;
/** Sets the option for truncating a previous file. If a file is
* successfully opened with this option set it will truncate the file to `0`
* size if it already exists. The file must be opened with write access
* for truncate to work. */
truncate?: boolean;
/** Sets the option to allow creating a new file, if one doesn't already
* exist at the specified path. Requires write or append access to be
* used. */
create?: boolean;
/** Defaults to `false`. If set to `true`, no file, directory, or symlink is
* allowed to exist at the target location. Requires write or append
* access to be used. When createNew is set to `true`, create and truncate
* are ignored. */
createNew?: boolean;
/** Permissions to use if creating the file (defaults to `0o666`, before
* the process's umask).
* Ignored on Windows. */
mode?: number;
}
/**
*
* Check if a given resource id (`rid`) is a TTY.
*
* // This example is system and context specific
* const nonTTYRid = Deno.openSync("my_file.txt").rid;
* const ttyRid = Deno.openSync("/dev/tty6").rid;
* console.log(Deno.isatty(nonTTYRid)); // false
* console.log(Deno.isatty(ttyRid)); // true
* Deno.close(nonTTYRid);
* Deno.close(ttyRid);
*/
export function isatty(rid: number): boolean;
/** **UNSTABLE**: new API, yet to be vetted
*
* Set TTY to be under raw mode or not. In raw mode, characters are read and
* returned as is, without being processed. All special processing of
* characters by the terminal is disabled, including echoing input characters.
* Reading from a TTY device in raw mode is faster than reading from a TTY
* device in canonical mode.
*
* Deno.setRaw(myTTY.rid, true);
*/
export function setRaw(rid: number, mode: boolean): void;
/** A variable-sized buffer of bytes with `read()` and `write()` methods.
*
* Deno.Buffer is almost always used with some I/O like files and sockets. It
* allows one to buffer up a download from a socket. Buffer grows and shrinks
* as necessary.
*
* Deno.Buffer is NOT the same thing as Node's Buffer. Node's Buffer was
* created in 2009 before JavaScript had the concept of ArrayBuffers. It's
* simply a non-standard ArrayBuffer.
*
* ArrayBuffer is a fixed memory allocation. Deno.Buffer is implemented on top
* of ArrayBuffer.
*
* Based on [Go Buffer](https://golang.org/pkg/bytes/#Buffer). */
export class Buffer implements Reader, ReaderSync, Writer, WriterSync {
constructor(ab?: ArrayBuffer);
/** Returns a slice holding the unread portion of the buffer.
*
* The slice is valid for use only until the next buffer modification (that
* is, only until the next call to a method like `read()`, `write()`,
* `reset()`, or `truncate()`). The slice aliases the buffer content at
* least until the next buffer modification, so immediate changes to the
* slice will affect the result of future reads. */
bytes(): Uint8Array;
/** Returns whether the unread portion of the buffer is empty. */
empty(): boolean;
/** A read only number of bytes of the unread portion of the buffer. */
readonly length: number;
/** The read only capacity of the buffer's underlying byte slice, that is,
* the total space allocated for the buffer's data. */
readonly capacity: number;
/** Discards all but the first `n` unread bytes from the buffer but
* continues to use the same allocated storage. It throws if `n` is
* negative or greater than the length of the buffer. */
truncate(n: number): void;
/** Resets the buffer to be empty, but it retains the underlying storage for
* use by future writes. `.reset()` is the same as `.truncate(0)`. */
reset(): void;
/** Reads the next `p.length` bytes from the buffer or until the buffer is
* drained. Returns the number of bytes read. If the buffer has no data to
* return, the return is EOF (`null`). */
readSync(p: Uint8Array): number | null;
/** Reads the next `p.length` bytes from the buffer or until the buffer is
* drained. Resolves to the number of bytes read. If the buffer has no
* data to return, resolves to EOF (`null`).
*
* NOTE: This methods reads bytes sychronously; it's provided for
* compatibility with `Reader` interfaces.
*/
read(p: Uint8Array): Promise<number | null>;
writeSync(p: Uint8Array): number;
/** NOTE: This methods writes bytes sychronously; it's provided for
* compatibility with `Writer` interface. */
write(p: Uint8Array): Promise<number>;
/** Grows the buffer's capacity, if necessary, to guarantee space for
* another `n` bytes. After `.grow(n)`, at least `n` bytes can be written to
* the buffer without another allocation. If `n` is negative, `.grow()` will
* throw. If the buffer can't grow it will throw an error.
*
* Based on Go Lang's
* [Buffer.Grow](https://golang.org/pkg/bytes/#Buffer.Grow). */
grow(n: number): void;
/** Reads data from `r` until EOF (`null`) and appends it to the buffer,
* growing the buffer as needed. It resolves to the number of bytes read.
* If the buffer becomes too large, `.readFrom()` will reject with an error.
*
* Based on Go Lang's
* [Buffer.ReadFrom](https://golang.org/pkg/bytes/#Buffer.ReadFrom). */
readFrom(r: Reader): Promise<number>;
/** Reads data from `r` until EOF (`null`) and appends it to the buffer,
* growing the buffer as needed. It returns the number of bytes read. If the
* buffer becomes too large, `.readFromSync()` will throw an error.
*
* Based on Go Lang's
* [Buffer.ReadFrom](https://golang.org/pkg/bytes/#Buffer.ReadFrom). */
readFromSync(r: ReaderSync): number;
}
/** Read Reader `r` until EOF (`null`) and resolve to the content as
* Uint8Array`.
*
* // Example from stdin
* const stdinContent = await Deno.readAll(Deno.stdin);
*
* // Example from file
* const file = await Deno.open("my_file.txt", {read: true});
* const myFileContent = await Deno.readAll(file);
* Deno.close(file.rid);
*
* // Example from buffer
* const myData = new Uint8Array(100);
* // ... fill myData array with data
* const reader = new Deno.Buffer(myData.buffer as ArrayBuffer);
* const bufferContent = await Deno.readAll(reader);
*/
export function readAll(r: Reader): Promise<Uint8Array>;
/** Synchronously reads Reader `r` until EOF (`null`) and returns the content
* as `Uint8Array`.
*
* // Example from stdin
* const stdinContent = Deno.readAllSync(Deno.stdin);
*
* // Example from file
* const file = Deno.openSync("my_file.txt", {read: true});
* const myFileContent = Deno.readAllSync(file);
* Deno.close(file.rid);
*
* // Example from buffer
* const myData = new Uint8Array(100);
* // ... fill myData array with data
* const reader = new Deno.Buffer(myData.buffer as ArrayBuffer);
* const bufferContent = Deno.readAllSync(reader);
*/
export function readAllSync(r: ReaderSync): Uint8Array;
/** Write all the content of the array buffer (`arr`) to the writer (`w`).
*
* // Example writing to stdout
* const contentBytes = new TextEncoder().encode("Hello World");
* await Deno.writeAll(Deno.stdout, contentBytes);
*
* // Example writing to file
* const contentBytes = new TextEncoder().encode("Hello World");
* const file = await Deno.open('test.file', {write: true});
* await Deno.writeAll(file, contentBytes);
* Deno.close(file.rid);
*
* // Example writing to buffer
* const contentBytes = new TextEncoder().encode("Hello World");
* const writer = new Deno.Buffer();
* await Deno.writeAll(writer, contentBytes);
* console.log(writer.bytes().length); // 11
*/
export function writeAll(w: Writer, arr: Uint8Array): Promise<void>;
/** Synchronously write all the content of the array buffer (`arr`) to the
* writer (`w`).
*
* // Example writing to stdout
* const contentBytes = new TextEncoder().encode("Hello World");
* Deno.writeAllSync(Deno.stdout, contentBytes);
*
* // Example writing to file
* const contentBytes = new TextEncoder().encode("Hello World");
* const file = Deno.openSync('test.file', {write: true});
* Deno.writeAllSync(file, contentBytes);
* Deno.close(file.rid);
*
* // Example writing to buffer
* const contentBytes = new TextEncoder().encode("Hello World");
* const writer = new Deno.Buffer();
* Deno.writeAllSync(writer, contentBytes);
* console.log(writer.bytes().length); // 11
*/
export function writeAllSync(w: WriterSync, arr: Uint8Array): void;
export interface MkdirOptions {
/** Defaults to `false`. If set to `true`, means that any intermediate
* directories will also be created (as with the shell command `mkdir -p`).
* Intermediate directories are created with the same permissions.
* When recursive is set to `true`, succeeds silently (without changing any
* permissions) if a directory already exists at the path, or if the path
* is a symlink to an existing directory. */
recursive?: boolean;
/** Permissions to use when creating the directory (defaults to `0o777`,
* before the process's umask).
* Ignored on Windows. */
mode?: number;
}
/** Synchronously creates a new directory with the specified path.
*
* Deno.mkdirSync("new_dir");
* Deno.mkdirSync("nested/directories", { recursive: true });