Redact fixed positions on every line within a file.
npm install @pglezen/redactRedact
======
Redact the contents of each line of a file according to
rules expressed as JSON. The following sample is fromsampleRules.json.
``
[
{ startingAt: 3, replaceWith: "TTTT" },
{ startingAt: 15, replaceWith: "VVV", padding: 7 }
]
The startingAt index is zero-based. The above means
that for for each line of the input file:
- starting at column 4, overwrite content with TTTT
- starting at column 16, overwrite content with .String.prototype.padEnd()
If necessary, pad with extra space so that at least 7
characters are overwritten);
- If the field replacement exceeds the line length, truncate
the replacement so that line length is preserved.
- The optional padding attribute means pad to the right with spaces
until the string length is the size indicated (according to
).
Invoke as
`
node redact sampleRules.json sampleInput.txt > redactedFile.txt
Here is the result run on the sample.
`
$ cat sampleInput.txt
This is a test file. We need some long lines.
It is use to test a redaction utility. Good luck.
A short line.
$ node redact sampleRules.json sampleInput.txt
ThiTTTT a teVVV We need some long lines.
It TTTTse toVVV daction utility. Good luck.
A sTTTT lineV
Error and warning messages are written to standard error.
They will not appear in the result file if standard output
is redirected.