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Full Discussion: Renaming a bunch of files
Top Forums Shell Programming and Scripting Renaming a bunch of files Post 302242894 by tokland on Friday 3rd of October 2008 07:13:37 AM
Old 10-03-2008
Java Renaming a bunch of files
This is possibly a FAQ, but I was unable to find an answer: let's say you have two files named "hello.txt" and "goodbye.txt" and you want them to be "hi.txt" and "seeyou.txt". The typical regular expressions renamer apps do not apply, as you want different new names for each one of the files. The first logical step is creating a text file with the new names:

Code:
hi.txt
seeyou.txt

Then, using the command paste I got that:

Code:
#!/bin/bash
# Usage: rename_from_file.sh newfilenames.txt hello.txt goodbye.txt
set -e
NEWFILENAMES=$1
shift
for FILENAME in "$@"; do 
    echo "$FILENAME" 
done | paste - $NEWFILENAMES | tr '\n' '\t' | xargs -rt -d"\t" -n2 mv

Seeking a one-liner solution I came across the interesting "process substitution" bash feature, and this is what I got (still using paste):

Code:
#!/bin/bash
# Usage: rename_from_file.sh hello.txt goodbye.txt <newfilenames.txt
paste <(for FILE in "$@"; do echo "$FILE"; done) - | tr '\n' '\t' | xargs -rt -d"\t" -n2 mv

I cannot say I am proud of it, so... any better ideas?

regards
 

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LEARN ABOUT DEBIAN

grcompiler

grcompiler(1)															     grcompiler(1)

NAME

       grcompiler - Compile GDL into a TrueType Font

SYNOPSIS

       grcompiler [-d] [-D] [-g] [-n number] [-v number] [-w number] [-wall] [-q] gdl-file font-file [output-file] [output-fontname]

Description
       Grcompiler  compiles  a	Graphite Description Language description of the smarts for a font along with a TrueType Font to create a graphite
       font with graphite tables in it.

       -d     Generate XML debugger file.

       -D     Generate all debugger files.

       -g     Permit and ignore invalid glyph definitions.

       -nnumber
	      Set name table start location.

       -q     Quiet mode (no messages except on error).

       -vnumber
	      Set Silf table version number.

       -wnnnn Ignore warning with the given number. This option may be repeated.

       -wall  Display all warnings.

Environment
       grcompiler makes use of the following environment variables

       GDLPP  Specifies the command to execute to run the GDL preprocessor

Files
       gdlerr.txt
	      Warnings and errors are output to this file.

       dbg_classes.txt
	      Debug file that specifies the classes stored in the font in terms of their GDL source and containing glyph ids in hex.

       dbg_cmap.txt
	      Debug file giving Unicode to glyph mapping of all the glyphs in the font and vice versa.

       dbg_enginecode.txt
	      Debug file containing the action code and constraint code associated with each pass and rule in a pass.

       dbg_fsm.txt
	      Debug file that gives the finite state machines of each pass and the rules referenced. For each pass, a  mapping	is  given  between
	      glyph and column number.

       dbg_glyphattrs.txt
	      Debug file containing all the glyph attributes and their names, along with values specified for each glyph.

       dbg_parsetree.txt
	      Debug file giving the complete parse tree of the GDL source file.

       dbg_ruleprec.txt
	      Debug file that lists the rules in precedence order (order in which they will be tested) for each pass.

       $_temp.gdl
	      Debug file containing the output of gdlpp

Author
       Martin Hosken <mhosken@users.sourceforge.net>

							   $Date: 2012-05-29 11:36:50 $ 					     grcompiler(1)
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