NAME

update - Greple module to update file content

SYNOPSIS

greple -Mupdate

Options:

  --update       replace file content
  --with-backup  make backup files

  --diff         produce diff output
  -U#            specify unified diff context length

  --discard      simply discard the output

VERSION

Version 1.03

DESCRIPTION

This greple module substitute the target file content by command output. For example, next command replace all words in the file to uppercase.

    greple -Mupdate '\w+' --cm 'sub{uc}' --update file

Above is a very simple example but you can implement arbitrarily complex function in conjunction with other various greple options.

You can check how the file will be edited by --diff option.

    greple -Mupdate '\w+' --cm 'sub{uc}' --diff file

Command sdif or cdif would be useful to see the difference visually.

    greple -Mupdate '\w+' --cm 'sub{uc}' --diff file | cdif

This module has been spun off from App::Greple::subst module. Consult it for more practical use case.

OPTIONS

--update
--update::update

Update the target file by command output. Entire file content is produced and any color effects are canceled. Without this option, greple behaves as normal operation, that means only matched lines are printed.

File is not touched as far as its content does not change.

The file is also not updated if the output is empty. This is to prevent the contents of the file from being erased if none of the match strings are included. If you want to intentionally empty a file, you need to think of another way.

--with-backup[=suffix]

Backup original file with .bak suffix. If optional parameter is given, it is used as a suffix string. If the file exists, .bak_1, .bak_2 ... are used.

--discard
--update::discard

Simply discard the command output without updating file.

--diff
--update::diff

Option -diff produce diff output of original and converted text. Option -U# can be used to specify context length.

INSTALL

CPANMINUS

    $ cpanm App::Greple::update

GITHUB

    $ cpanm https://github.com/kaz-utashiro/greple-update.git

SEE ALSO

App::Greple, https://github.com/kaz-utashiro/greple

App::Greple::update, https://github.com/kaz-utashiro/greple-update

App::Greple::subst, https://github.com/kaz-utashiro/greple-subst

App::sdif, App::cdif

AUTHOR

Kazumasa Utashiro

LICENSE

Copyright 2022-2024 Kazumasa Utashiro.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.