rewrite.ts ➔ rewrite - Code Metrics - Inspection of "#16 Change rewrite to be append-based with truncat..." - askirmas/postcss-d-ts - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Push — master ( 1cac73...4f0cd7 )

by Andrii

created 2021-03-17 10:45 UTC

rewrite.ts ➔ rewrite C

↳ Parent: Project

Complexity

Conditions

Size

Total Lines	44
Code Lines	35

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
eloc	35
dl	0
loc	44
rs	6.6666
c	0
b	0
f	0
cc	9

import {promisify} from "util"
import {createReadStream, exists, open, writeFile, close, truncate } from 'fs'
import {createInterface} from 'readline'

const $exists = promisify(exists)
, $open = promisify(open)
, $write = promisify(writeFile)
, $truncate = promisify(truncate)
, $close = promisify(close)

export = rewrite

// TODO #12 with .trim() https://jsbench.me/fykmaajqmc/

async function rewrite(filename: string, lines: string[], eol: string) {
  const {length} = lines
  , {length: eolLength} = eol
  , fileExists = await $exists(filename)

  let row = 0
  , position = 0

  if (fileExists) {
    const lineReader = createInterface({
      input: createReadStream(filename),
      crlfDelay: Infinity,
      historySize: 0
    })

    let isSame = true

    for await (const line of lineReader) {
      if (line !== lines[row]) {
        isSame = false
        continue
      }
      row++
      position += line.length
    }

    lineReader.close()

    if (isSame) {
      if (lines[row] === "")
        row++
      if (length === row)
        return
    }

    await $truncate(filename, position + eolLength * (row - 1))
  }

  const fd = await $open(filename, "a")

  for (let i = row; i < length; i++)
    await $write(fd, `${
      i ? eol : ''
    }${
      lines[i]
    }`)

  await $close(fd)
}


1			import {promisify} from "util"
2			import {createReadStream, exists, open, writeFile, close, truncate } from 'fs'
3			import {createInterface} from 'readline'
4
5			const $exists = promisify(exists)
6			, $open = promisify(open)
7			, $write = promisify(writeFile)
8			, $truncate = promisify(truncate)
9			, $close = promisify(close)
10
11			export = rewrite
12
13			// TODO #12 with .trim() https://jsbench.me/fykmaajqmc/
14
15			async function rewrite(filename: string, lines: string[], eol: string) {
16			const {length} = lines
17			, {length: eolLength} = eol
18			, fileExists = await $exists(filename)
19
20			let row = 0
21			, position = 0
22
23			if (fileExists) {
24			const lineReader = createInterface({
25			input: createReadStream(filename),
26			crlfDelay: Infinity,
27			historySize: 0
28			})
29
30			let isSame = true
31
32			for await (const line of lineReader) {
33			if (line !== lines[row]) {
34			isSame = false
35			continue
36			}
37			row++
38			position += line.length
39			}
40
41			lineReader.close()
42
43			if (isSame) {
44			if (lines[row] === "")
45			row++
46			if (length === row)
47			return
48			}
49
50			await $truncate(filename, position + eolLength * (row - 1))
51			}
52
53			const fd = await $open(filename, "a")
54
55			for (let i = row; i < length; i++)
56			await $write(fd, `${
57			i ? eol : ''
58			}${
59			lines[i]
60			}`)
61
62			await $close(fd)
63			}
64

askirmas / postcss-d-ts

Push — master ( 1cac73...4f0cd7 )

rewrite.ts ➔ rewrite C

Complexity

Size

Duplication

Importance

Duplication Side-by-Side

Filter issues like