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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LEARN ABOUT DEBIAN

lpe

LPE(1)							      General Commands Manual							    LPE(1)

NAME

       lpe - Lightweight programmer's editor

SYNOPSIS

       lpe [ --help | --version ]
       lpe [--mode <mode>] [ -- ] file

DESCRIPTION

       Lpe  is	a  small,  fast, visual text editor designed to make editing code easier.  It provides simultaneously all the features that may be
       required in a good code editor while preserving a light and intuitive feel that makes it nice to use.

   Options
       --help Prints a brief description of program usage and terminates.  This must be the first  option  to  lpe,  and  all  other  options  are
	      ignored.

       --version
	      Prints  a  message  indication  the program version and terminates.  This must be the first option to lpe, and all other options are
	      ignored.

       --mode Sets the buffer mode to the one specified, instead of scanning for a suitable mode from those available.

       --     Treat future arguments as file names, not options.  This allows lpe to be used to edit files starting with the - character.

NOTES

       What follows are the control key functions for lpe.  Arrow keys, home, end, backspace, delete and the like all do as they would be expected
       to  do.	 Some  control keys are bound to the same function as some standard movement keys, such as home or page down.  This is because the
       more intuitive keys may not be available on some systems.

   Command Keys
       Ctrl-Q Move cursor to beginning of line (alternative to Home)

       Ctrl-W Move cursor to end of line (alternative to End)

       Ctrl-R Scroll one screen up (alternative to PgUp)

       Ctrl-T Scroll one screen down (alternative to PgDn)

       Ctrl-O Move to the next word

       Ctrl-P Move to the previous word

       Ctrl-K Kill the current line

       Ctrl-Y or Ctrl-U
	      Insert the most recent block of killed lines

       Ctrl-S Search for a specified string in the file

       Ctrl-A Search again for the last search query

       Ctrl-F Ctrl-O
	      Open a new file to replace the current buffer

       Ctrl-F Ctrl-S
	      Save the buffer to disk

       Ctrl-F Ctrl-A
	      Save to disk with an alternate file name

       Ctrl-F Ctrl-R
	      Read a file and insert it at the current cursor position

       Ctrl-F Ctrl-E
	      Pretend that a buffer hasn't been modified

       Ctrl-B Ctrl-S
	      Set the mode of the current buffer

       Ctrl-B Ctrl-T
	      Toggle between hard and soft tabs for this buffer

       Ctrl-B Ctrl-A
	      Toggle automatic indentation of this buffer

       Ctrl-G Ctrl-A
	      Go to the first line of the buffer

       Ctrl-G Ctrl-S
	      Go to the last line of the buffer

       Ctrl-G Ctrl-G
	      Go to a specific line number of the buffer

       Ctrl-N Ctrl-R
	      Enter a value for the command repeater

       Ctrl-N Ctrl-T
	      Multiply the command repeater value by four

       Ctrl-N Ctrl-O
	      Start or stop recording a macro

       Ctrl-N Ctrl-P
	      Play back the last recorded macro

       Ctrl-V Ctrl-V
	      Pass the entire buffer through a shell command

       Ctrl-V Ctrl-A
	      Pass the entire buffer through an awk script

       Ctrl-V Ctrl-S
	      Pass the entire buffer through a sed script

       Ctrl-V Ctrl-B
	      Pass several lines of the buffer through a shell command

       Ctrl-V Ctrl-D
	      Pass several lines of the buffer through an awk script

       Ctrl-V Ctrl-F
	      Pass several lines of the buffer through a sed script

       Ctrl-D Perform an internal debug command

       Ctrl-X Write the buffer to disk and exit

       <interrupt>
	      Exit without writing to disk

       Ctrl-Z Suspend the editor and escape to a prompt

       Ctrl-L Erase and redraw the entire screen

	      <interrupt> refers to your terminal's interrupt key.  This is often Ctrl-C, but can vary between terminals.  Ctrl-Z,  on	the  other
	      hand, is fixed, regardless of the normal stop key for your terminal.

MODULES

       Although lpe is meant to be small, it has the capability of performing more advanced actions through a feature known as buffer modes.  Buf-
       fer modes allow lpe to act differently according to the programming language in the current buffer.  They are implemented through  language
       modules, which are loaded at run-time by lpe to handle buffers that they apply to.

       All language modules should be placed in a module repository directory.	These directories are set by the LPE_MODULE_PATH environment vari-
       able, which should be a colon-separated list of directories (similar to PATH).  If this variable is not set, then lpe scans for modules	in
       the following locations, and in this order:

       $HOME/.lpe /usr/local/lib/lpe /usr/lib/lpe /etc/lpe

       Note  that  the /etc/lpe directory is old, obsolete, and non-standard.  It should not be used to hold modules.  As modules are binary files
       and are specific to the architecture that uses them, they should be properly placed in the lib directories listed above.

       These locations are scanned at run-time, and any regular files in them are interpreted as potential language modules for use by lpe.   Sub-
       directories  will  not  be  scanned.   A buffer will be assigned the first mode found that applies to that file, so for example a mode in a
       user's home directory will override one in the system-wide lib directory.

SEE ALSO

       emacs(1), pico(1)

AUTHOR

       Chris Smith, cd_smith@ou.edu

BUGS

       Lots of 'em -- see the BUGS file in the distribution for a partial list.  I am not planning on updating this man page often enough to  keep
       up with the bug list, so I won't even try to list bugs here.

								 12 December 1998							    LPE(1)