rcf

rcf

rcf is a CLI tool for replacing file contents.

Usage

$ rcf -i input.txt -s before -t after -o output.txt

The arguments are as follows.

Usage: rcf -i INPUT [-r REGEX | -s STRING] -t REPLACEMENT [--escape] [--recursive] [-c CHARSET] [-o OUTPUT | --overwrite]

Flags
  -i, --input string         Input file/dir path.
  -r, --regex string         Target regex.
  -s, --string string        Target string.
  -t, --replacement string   Replacement.
  -e, --escape               Enable escape sequence.
  -R, --recursive            Recursively traverse the input dir.
  -c, --charset string       Charset. (default "UTF-8")
  -o, --output string        Output file/dir path.
  -O, --overwrite            Overwrite the input file.
  -h, --help                 Help.

Specify replacement

The target can be a regular expression or a string.

The regular expression is specified by -r.

$ rcf -i input.txt -r "[0-9]" -t "" -o output.txt

You can also use the capture group as -t.
The following is a method for specifying "N" at the beginning of a number.

$ rcf -i input.txt -r "([0-9]+)" -t "N$1" -o output.txt

Please refer to the following for the syntax of regular expressions.

• https://pkg.go.dev/regexp/syntax

String is specified by -s.

$ rcf -i input.txt -s a -t z -o output.txt

To treat backslash as an escape sequence, specify -e.

$ rcf -i input.txt -s "\u3000" -e -t "" -o output.txt

Input / Output

If specified with -i, only the specified file will be processed.

$ rcf -i input.txt -s a -t z -o output.txt

If a directory is specified, files under the directory are processed.

$ rcf -i in_dir -s a -t z -o out_dir

The default is to process only files directly under the specified directory.
If -r is specified, subdirectories are processed recursively.

$ rcf -i in_dir -r -s a -t z -o out_dir

Use -o to specify the output destination.
To rewrite the input file itself, use -O.

$ rcf -i input.txt -s before -t after -O

Charset

When processing non UTF-8 files, specify the Charset with -c.

$ rcf -i input.txt -s a -t z -o output.txt -c sjis

Charset must be one that can be specified in htmlindex.Get.

• https://pkg.go.dev/golang.org/x/text/encoding/htmlindex#Get

A special charset is binary.
If binary is specified, it can be treated as a hexadecimal character.
A hexadecimal character represents a byte with three characters prefixed by x, such as x00 or xFF.

To remove two consecutive bytes, such as 0x00 0x01, specify as follows

$ rcf -i input.txt -s x00x01 -t "" -o output.txt -c binary

Install

You can download the binary from the following.

• https://github.com/onozaty/rcf/releases/latest

License

MIT

Author

onozaty