1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import {
WriteFileOptions,
isFileOptions,
CallbackWithError,
getOpenOptions,
} from "./_fs_common.ts";
import { notImplemented } from "../_utils.ts";
import { fromFileUrl } from "../path.ts";
/**
* TODO: Also accept 'data' parameter as a Node polyfill Buffer type once these
* are implemented. See https://github.com/denoland/deno/issues/3403
*/
export function appendFile(
pathOrRid: string | number | URL,
data: string,
optionsOrCallback: string | WriteFileOptions | CallbackWithError,
callback?: CallbackWithError
): void {
pathOrRid = pathOrRid instanceof URL ? fromFileUrl(pathOrRid) : pathOrRid;
const callbackFn: CallbackWithError | undefined =
optionsOrCallback instanceof Function ? optionsOrCallback : callback;
const options: string | WriteFileOptions | undefined =
optionsOrCallback instanceof Function ? undefined : optionsOrCallback;
if (!callbackFn) {
throw new Error("No callback function supplied");
}
validateEncoding(options);
let rid = -1;
const buffer: Uint8Array = new TextEncoder().encode(data);
new Promise((resolve, reject) => {
if (typeof pathOrRid === "number") {
rid = pathOrRid;
Deno.write(rid, buffer).then(resolve).catch(reject);
} else {
const mode: number | undefined = isFileOptions(options)
? options.mode
: undefined;
const flag: string | undefined = isFileOptions(options)
? options.flag
: undefined;
if (mode) {
//TODO rework once https://github.com/denoland/deno/issues/4017 completes
notImplemented("Deno does not yet support setting mode on create");
}
Deno.open(pathOrRid as string, getOpenOptions(flag))
.then(({ rid: openedFileRid }) => {
rid = openedFileRid;
return Deno.write(openedFileRid, buffer);
})
.then(resolve)
.catch(reject);
}
})
.then(() => {
closeRidIfNecessary(typeof pathOrRid === "string", rid);
callbackFn();
})
.catch((err) => {
closeRidIfNecessary(typeof pathOrRid === "string", rid);
callbackFn(err);
});
}
function closeRidIfNecessary(isPathString: boolean, rid: number): void {
if (isPathString && rid != -1) {
//Only close if a path was supplied and a rid allocated
Deno.close(rid);
}
}
/**
* TODO: Also accept 'data' parameter as a Node polyfill Buffer type once these
* are implemented. See https://github.com/denoland/deno/issues/3403
*/
export function appendFileSync(
pathOrRid: string | number | URL,
data: string,
options?: string | WriteFileOptions
): void {
let rid = -1;
validateEncoding(options);
pathOrRid = pathOrRid instanceof URL ? fromFileUrl(pathOrRid) : pathOrRid;
try {
if (typeof pathOrRid === "number") {
rid = pathOrRid;
} else {
const mode: number | undefined = isFileOptions(options)
? options.mode
: undefined;
const flag: string | undefined = isFileOptions(options)
? options.flag
: undefined;
if (mode) {
// TODO rework once https://github.com/denoland/deno/issues/4017 completes
notImplemented("Deno does not yet support setting mode on create");
}
const file = Deno.openSync(pathOrRid, getOpenOptions(flag));
rid = file.rid;
}
const buffer: Uint8Array = new TextEncoder().encode(data);
Deno.writeSync(rid, buffer);
} finally {
closeRidIfNecessary(typeof pathOrRid === "string", rid);
}
}
function validateEncoding(
encodingOption: string | WriteFileOptions | undefined
): void {
if (!encodingOption) return;
if (typeof encodingOption === "string") {
if (encodingOption !== "utf8") {
throw new Error("Only 'utf8' encoding is currently supported");
}
} else if (encodingOption.encoding && encodingOption.encoding !== "utf8") {
throw new Error("Only 'utf8' encoding is currently supported");
}
}
|
