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Full Discussion: Concatenate Numerous Files
Operating Systems Linux Fedora Concatenate Numerous Files Post 302722841 by sudon't on Sunday 28th of October 2012 07:28:22 PM
Old 10-28-2012
Use regex to change filenames
OK, I numbered the directories by hand so that they would sort in the canonical order. Now, they had the files within the directories numbered using single digit enumeration, so naturally they don't sort correctly:
Code:
./01_Old Testament/01_Genesis/Genesis1.txt
./01_Old Testament/01_Genesis/Genesis10.txt
./01_Old Testament/01_Genesis/Genesis11.txt

So I worked out a regex to place a zero in front of single digit filenames:
Code:
perl -pi -e 's/(?<=[a-z])(?=[0-9]\.txt)/0/g' ./OTfilelist.txt

I won't say how long, or how many tries it took for me to figure this out, even though I'm sure it would make for an exciting story. But, even though I am filled with a feeling of accomplishment, the filenames still do not sort correctly.
Code:
./01_Old Testament/01_Genesis/Genesis01.txt
./01_Old Testament/01_Genesis/Genesis10.txt
./01_Old Testament/01_Genesis/Genesis11.txt

No matter, because I want things to behave in the real world, too.
So, now that I have the magic regex in hand, how can I use it to change the actual filenames?
What I've been able to glean from the web is that there is a system call called "rename" which somehow should work with perl. But there is no mention of "rename" in the perl man page. On the other hand, there is a man page for rename, but it doesn't contain anything that I found illuminating. I'm guessing this is something that has to be called from a script?
I've also seen examples on the web of rename as a(n apparent) standalone executable, but I don't seem to have it. Nor can I find it though ports or fink.
Code:
-bash $ rename
-bash: rename: command not found

I guess I should mention I'm using Mac OS 10.6.8, Perl 5.12.4
Is there a different way to invoke this rename? Am I barking up the wrong tree altogether? Surely there's a one-liner solution to recursively rename files with a regex?
 

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LEARN ABOUT DEBIAN

dh_di_numbers

DH_DI_NUMBERS(1)						     Debhelper							  DH_DI_NUMBERS(1)

NAME

       dh_di_numbers - install numbered scripts into package build directories

SYNOPSIS

       dh_di_numbers [debhelper options] [dir [...] dest]

DESCRIPTION

       dh_di_numbers is a debhelper program that installs directories of numbered scripts into package build directories.

       Within each directory, there should be a "_numbers" file in which each line contains at least two space-separated fields. The first field
       in each line is a two-digit number, which will be prefixed to the entry name to provide ordering within the directory; the second is the
       entry name, which must correspond to a file or directory alongside the "_numbers" file; and the third field, if present, is another two-
       digit number which identifies another entry with the same entry name to which this entry should be a symlink.

       Any additional directory names specified as parameters will be installed in the package build directory of the first package dh_di_numbers
       is told to act on. By default, this is the first binary package in debian/control, but if you use -p, -i, or -a flags, it will be the first
       package specified by those flags.

FILES

       debian/package.di-numbers
	   List the directories to install into each package and the directory they should be installed to. The format is a set of lines, where
	   each line lists a directory or directories to install, and at the end of the line tells the directory they should be installed in. The
	   name of the directories to install should be given relative to the current directory, while the installation directory is given
	   relative to the package build directory. You may use wildcards in the names of the files to install (in v3 mode and above).

OPTIONS

       dir [...] dest
	   Lists directories to install and where to install them to. The files will be installed into the first package dh_di_numbers acts on.

SEE ALSO

       debhelper(7)

       This program is a part of dh-di.

AUTHOR

       Colin Watson <cjwatson@debian.org>

3								    2009-09-16							  DH_DI_NUMBERS(1)
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