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Full Discussion: Bash Scripting with date format conversion
Top Forums Shell Programming and Scripting Bash Scripting with date format conversion Post 302974281 by stomp on Friday 27th of May 2016 07:56:26 AM
Old 05-27-2016
So you you want to make a filename conversion like this:

Code:
INPUT    : postwrf_d01_YYYYMMDD_ZZZZ_f0HHHH.grb2
OUTPUT 1 :         d01_YYYYMMDD_ZZZZ_f0HHHH.grb2
OUTPUT 2 :             YYYYMMDD_ZZZZ_f0HHHH.gr2 
OUTPUT 3 :    nwp.TC23.YYYYMMDDZZ.f0MMMM

I suggest you capture the wanted subgroups e. g. with sed and then reassemble the string for the different needs.

Code:
#!/bin/bash
FILENAME="postwrf_d01_20160527_0600_f01000.grb2"
set $( echo "$filename"  \
   | sed -r -e 's/^postwrf_d01_([0-9]{4})([0-9]{2})([0-9]{2})_([0-9]{4})_f0([0-9]{4}).grb2$/\1 \2 \3 \4 \5/'  )
YYYY="$1"
MM="$2"
DD="$3"
ZZZZ="$4"
HHHH="$5"

OUTPUT_1= "d01_${YYYY}${MM}${DD}_${ZZZZ}_f0${HHHH}.grb2"

# Now calculate the hour to minutes with the (( )) function. (See man bash for arithmetic evaluation).
((MINUTES=....))
# For leading zeros you may need to use printf. 
MINUTES=$(printf "%04d" $MINUTES)

Last edited by stomp; 05-27-2016 at 01:37 PM..
This User Gave Thanks to stomp For This Post:
cumulus_255
 

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LEARN ABOUT OSX

locale::codes::langext

Locale::Codes::LangExt(3pm)				 Perl Programmers Reference Guide			       Locale::Codes::LangExt(3pm)

NAME

       Locale::Codes::LangExt - standard codes for language extension identification

SYNOPSIS

	  use Locale::Codes::LangExt;

	  $lext = code2langext('acm');		       # $lext gets 'Mesopotamian Arabic'
	  $code = langext2code('Mesopotamian Arabic'); # $code gets 'acm'

	  @codes   = all_langext_codes();
	  @names   = all_langext_names();

DESCRIPTION

       The "Locale::Codes::LangExt" module provides access to standard codes used for identifying language extensions, such as those as defined in
       the IANA language registry.

       Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default IANA language
       registry codes will be used.

SUPPORTED CODE SETS

       There are several different code sets you can use for identifying language extensions. A code set may be specified using either a name, or
       a constant that is automatically exported by this module.

       For example, the two are equivalent:

	  $lext = code2langext('acm','alpha');
	  $lext = code2langext('acm',LOCALE_LANGEXT_ALPHA);

       The codesets currently supported are:

       alpha
	   This is the set of three-letter (lowercase) codes from the IANA language registry, such as 'acm' for Mesopotamian Arabic.

	   This is the default code set.

ROUTINES

       code2langext ( CODE [,CODESET] )
       langext2code ( NAME [,CODESET] )
       langext_code2code ( CODE ,CODESET ,CODESET2 )
       all_langext_codes ( [CODESET] )
       all_langext_names ( [CODESET] )
       Locale::Codes::LangExt::rename_langext  ( CODE ,NEW_NAME [,CODESET] )
       Locale::Codes::LangExt::add_langext  ( CODE ,NAME [,CODESET] )
       Locale::Codes::LangExt::delete_langext  ( CODE [,CODESET] )
       Locale::Codes::LangExt::add_langext_alias  ( NAME ,NEW_NAME )
       Locale::Codes::LangExt::delete_langext_alias  ( NAME )
       Locale::Codes::LangExt::rename_langext_code  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangExt::add_langext_code_alias  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangExt::delete_langext_code_alias  ( CODE [,CODESET] )
	   These routines are all documented in the Locale::Codes::API man page.

SEE ALSO

       Locale::Codes
	   The Locale-Codes distribution.

       Locale::Codes::API
	   The list of functions supported by this module.

       http://www.iana.org/assignments/language-subtag-registry
	   The IANA language subtag registry.

AUTHOR

       See Locale::Codes for full author history.

       Currently maintained by Sullivan Beck (sbeck@cpan.org).

COPYRIGHT

	  Copyright (c) 2011-2012 Sullivan Beck

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

perl v5.16.2							    2012-10-11					       Locale::Codes::LangExt(3pm)
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