How to find files containing two strings in different lines

findgrep

A real example is: I have a Python file util.py, and I changed one of the function name from foo to bar. There might be other files using foo as function name and they are irrelevant.

I want to update all the Python files in the project from foo to bar. So I would like to do a search on files for imports such as:

import project.path.util

from project.path.util import foo

and any calls to foo such as one starting with:

foo(

The solution has to be whitespace tolerant.
I can search each of them using grep but I am uncertain about the combined search. Any suggestions will be appreciated.

Best Answer

With GNU tools:

grep -rlZ --include='*.py' -e 'import project.path.util' \
                           -e 'from project.path.util import.*\bfoo\b' . |
  xargs -r0 sed -i 's/\bfoo\b/bar/g'

This works by asking grep to

search recursively (-r)
outputting names of matching files (-l)
separated by NUL instead of LF (-Z)
considering only files ending in '.py' (--include='*.py')

and asking sed to perform the replacement in-place (-i) in all matching files, if there are any (xargs -r).

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sed can do that :

sed -i.bak '/STRING/d' web/*

Find files containing string in file name and different string within file

That's because grep can't read file names to search through from standard input. What you're doing is printing file names that contain XYZ. Use find's -exec option instead:

find . -name "*ABC*" -exec grep -H 'XYZ' {} +

From man find:

   -exec command ;
          Execute  command;  true  if 0 status is returned.  All following
          arguments to find are taken to be arguments to the command until
          an  argument  consisting of `;' is encountered.  The string `{}'
          is replaced by the current file name being processed  everywhere
          it occurs in the arguments to the command, not just in arguments
          where it is alone, as in some versions of find. 

[...]

   -exec command {} +
          This  variant  of the -exec action runs the specified command on
          the selected files, but the command line is built  by  appending
          each  selected file name at the end; the total number of invoca‐
          tions of the command will  be  much  less  than  the  number  of
          matched  files.   The command line is built in much the same way
          that xargs builds its command lines.  Only one instance of  `{}'
          is  allowed  within the command.  The command is executed in the
          starting directory.

If you don't need the actual matching lines but only the list of file names containing at least one occurrence of the string, use this instead:

find . -name "*ABC*" -exec grep -l 'XYZ' {} +

Best Answer

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Find files containing string in file name and different string within file

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