NAME

fed - file editor for filtering and transforming text, file-wide.

SYNOPSIS

fed [OPTION]... [COMMAND]... [input-file]...

# Replace first occurance of 'foo' and 'bar' (and all between) with space.
fed 's/foo.+?baz/foo baz/' text_*.txt

# Strip comments from config files, each time show diff and ask:
fed -a -d 'r/\s*#.+?$/m' *.conf

# Remove HTML links.
fed -c 's{<a.+?>(.+?)<\\\/a>}{$1}sg' page*.html

DISCLAIMER

This is an Alpha release. It may be unstable. It may corrupt your files.

Use with caution, for evaluation purposes only.

DESCRIPTION

Fed is a replace/filter utility, working on per-line or per-file basis, across multiple files, even going recursively into directories.

It aims to provide easy access to some functionality of sed, awk and Perl.

By default it will replace files in-place, so you do not have to pipe/move anything.

You can control the edit process either by having changed files written under different name, or by inspecting changes (with diff) and accepting them manually.

COMMANDS

Following commands are supported: s (substitute), tr (transcode), p (pipe), r (remove), and m (match). Following separators are supported: //, {}, [].

Many commands can be provided in a row, they will all be applied one after another, each working on the output from previous one.

Please see App::Fed::Cookbook for how those can be applied to real-life situations.

s/PATTERN/EXPRESSION/MODIFIERS

Substitute, according to given expression.

tr/PATTERN/EXPRESSION/MODIFIERS

Transcode, according to given expression.

p/PATTERN/COMMAND/MODIFIERS

Pipe matched content into shell command, and use it's output as replacement.

r/PATTERN/MODIFIERS

Remove parts, that match the regular expression.

m/PATTERN/MODIFIERS

Match parts of the filename and remove anything else.

MODIFIERS

e

Evaluate EXPRESSION as Perl code, before replacing.

g

Enable global matching.

i

Do case-insensitive pattern matching.

m

Enable matching in multi-line mode.

That is, change "^" and "$" from matching the start or end of file to matching the start or end of any line.

s

Change "." to match any character whatsoever, even a newline, which normally it would not match.

Enabling 'm' and 's' as "/ms", they let the "." match any character whatsoever, while still allowing "^" and "$" to match, respectively, just after and just before newlines within the string.

COMMAND LINE OPTIONS

-a --ask

Ask, before writing anything.

-c --changed-only

Write anything only, if any changes ware made.

-d --diff

Show diff between original and modified content, before writing changes.

By default, program will not ask or wait for confirmation, just describe the changes and continue. If you want to be able to inspect and confirm changes, use with combination with -a.

This is useful to be able to quickly inspect - post-mortem - what has been done.

--diff-command=COMMAND

What comparison command to run, defaults to: diff.

-h --help

Output a short help and exit.

-m --move

When used with -P or -S, fed will move the file first, then copy it to the old name, and finally modify moved file.

This preserves hard links, ownership and other attributes.

If file is changed in-place, the option is silently ignored.

-p --pretend

Do not do anything, just pretend and describe what would be done.

This option overwrites -a (with a warning).

-q --quiet --silent

Output nothing, and if, then only to STDERR.

-r -R --recursive

Process directories recursively. If this option is not enabled, those will be ignored (silently, unless in verbose mode).

-P --prefix[=PREFIX]

Instead of doing the change in-place, save changed file to a copy with PREFIX added to the name.

-S --suffix[=SUFFIX]

Instead of doing the change in-place, save changed file to a copy with SUFFIX added to the name.

-v --verbose

Explain what is being done.

-V --version

Display version info and exit.

REGULAR EXPRESSIONS

This command uses Perl Regular Expressions. It will understand everything, that the version of Perl on which it runs will accept.

BUGS

Probably. None known at the moment.

Please report using CPAN RT or email to the author.

TODO

Those are some interesting potential features, that may be implemented in future version. If you need them, please notify the author.

-x --one-file-system

Do not cross file system boundaries.

--color --no-color

Enable (or disable) use of color in the output.

Requires Term::ANSIColor.

--recipe=RECIPY

Use recipe named RECIPY from the APP::Fed::Coocbook.

--check=Command

Run 'Command file' after applying changes.

If Command returns non-zero exit status, changes will be cancelled.

fed will create a tmp file containing modified content, and use it for test, before changing the original.

-s --stats --summary

On completion, dump summary of what was done.

SEE ALSO

ack(1), awk(1), ed(1), grep(1), tr(1), perlre(1), sed(1)

COPYRIGHT

Copyright (C) 2011 Bartłomiej /Natanael/ Syguła

This is free software. It is licensed, and can be distributed under the same terms as Perl itself.

cpanm App::Fed

perl -MCPAN -e shell
install App::Fed