Script to find & replace a multiple lines string across multiple php files and subdirectories Post: 302604153

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Top Forums Shell Programming and Scripting Script to find & replace a multiple lines string across multiple php files and subdirectories Post 302604153 by agama on Saturday 3rd of March 2012 11:07:47 AM

03-03-2012

Registered User

For starters, I'd rewrite the script you posted. The grep isn't needed, and since you're looking for a fixed set of files (*.php I assume), and fixed replace criteria, you don't need to worry about command line parameters. (You should if this is more than a one-off script, but I'll assume you don't need a script that you can run with different criteria.)

The basic script:

Code:

#!/usr/bin/env ksh

cd /directory/path/where/you/want/to/start
find . -name "*.php" | while read file
do
    echo "munging: $file"             # nice to see progress as it works
    mv "$file" "$file-"      # back it up

    ### insert sed or awk here ####  the sed in next line is for illustration only 
    sed 's/nosuchstringinthefile/noscuhreplacement/' "$file-" >"$file"
    if (( $? > 0 ))            # handle failure by putting the file back in place
    then
        echo "edit of $file failed" >&2
        mv "$file-" "$file"             # restore original
    else
        rm "$file-"               # worked, delete backup 
    fi
done

The tricky question is what criteria you need to determine which lines of the files to delete. Depending on what it is, the 'insert sed here' line in the previous script will need to change to do the right thing.

If your block of code is bounded by a unique string or phrase in the first and last lines then it will be a simple sed. The more complicated the criteria, the more complicated the code will need to be. Bottom line: post your criteria for deletion and someone will give you some help with writing a sed/awk or something that will delete things.

As for creating a script...
Start your favorite text editor, insert the code from above, or other of your choice, and save the file. Then at the command line, enter this command (assumes the file you saved was called delete_frm_php.ksh):

Code:

chmod 755 delete_frm_php.ksh

You then can invoke your script from the command line by typing delete_frm_php.ksh

agama

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shtool-subst

SHTOOL-SUBST.TMP(1)					      GNU Portable Shell Tool					       SHTOOL-SUBST.TMP(1)

NAME

       shtool-subst - GNU shtool sed(1) substitution operations

SYNOPSIS

       shtool subst [-v|--verbose] [-t|--trace] [-n|--nop] [-w|--warning] [-q|--quiet] [-s|--stealth] [-i|--interactive] [-b|--backup ext]
       [-e|--exec cmd] [-f|--file cmd-file] [file] [file ...]

DESCRIPTION

       This command applies one or more sed(1) substitution operations to stdin or any number of files.

OPTIONS

       The following command line options are available.

       -v, --verbose
	   Display some processing information.

       -t, --trace
	   Enable the output of the essential shell commands which are executed.

       -n, --nop
	   No operation mode. Actual execution of the essential shell commands which would be executed is suppressed.

       -w, --warning
	   Show warning on substitution operation resulting in no content change on every file. The default is to show a warning on substitution
	   operations resulted in no content change on all files.

       -q, --quiet
	   Suppress warning on substitution operation resulting in no content change.

       -s, --stealth
	   Stealth operation. Preserve timestamp on file.

       -i, --interactive
	   Enter interactive mode where the user has to approve each operation.

       -b, --backup ext
	   Preserve backup of original file using file name extension ext.  Default is to overwrite the original file.

       -e, --exec cmd
	   Specify sed(1) command directly.

       -f, --file cmd-file
	   Read sed(1) command from file.

EXAMPLE

	#   shell script
	shtool subst -i -e 's;(c) ([0-9]*)-2000;(c) 1-2001;' *.[ch]

	#    RPM spec-file
	%install
	    shtool subst -v -n 
		-e 's;^(prefix=).*;1 $RPM_BUILD_ROOT%{_prefix};g' 
		-e 's;^(sysconfdir=).*;1 $RPM_BUILD_ROOT%{_prefix}/etc;g' 
		`find . -name Makefile -print`
	    make install

HISTORY

       The GNU shtool subst command was originally written by Ralf S.  Engelschall <rse@engelschall.com> in 2001 for GNU shtool.  It was prompted
       by the need to have a uniform and convenient patching frontend to sed(1) operations in the OpenPKG package specifications.

SEE ALSO

       shtool(1), sed(1).

18-Jul-2008							   shtool 2.0.8 					       SHTOOL-SUBST.TMP(1)