Empty string replacement (`--replace ""`) is interpreted as absence of parameter

[kdeldycke]

• bump-my-version version: 0.15.4
• Python version: 3.12.1
• Operating System: macOS 14.2.1

Description

A simple search and replace of plain string by an empty one is polluted by non-matching rules from the configuration file.

This is a follow-up of #70.

What I Did

Here are my files:

• pyproject.toml:

  [tool.bumpversion]
  current_version = "2.21.1"
  allow_dirty = true
  
  [[tool.bumpversion.files]]
  filename = "./changelog.md"
  search = "random"
  replace = "blah_blah_blah"

• changelog.md:

   Changelog
  
  ## [2.21.1 (unreleased)](https://github.com/kdeldycke/workflows/compare/v2.21.0...main)
  
  - Test profanity.

Here I'm trying to replace the profanity string by XXX with this CLI invokation, and it works:

$ bump-my-version replace --dry-run --verbose --no-configured-files --allow-dirty --ignore-missing-version --search "profanity" --replace "XXX" ./changelog.md
Starting BumpVersion 0.15.4                                                                                                                                                                                         
Reading configuration                                                                                                                                                                                               
  Reading config file: /Users/kde/bump_test/pyproject.toml                                                                                                                                                          
Parsing version '2.21.1' using regexp '(?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)'                                                                                                                              
  Parsed the following values: major=2, minor=21, patch=1                                                                                                                                                           
                                                                                                                                                                                                                    
File ./changelog.md: replace `profanity` with `XXX`                                                                                                                                                                 
  Found 'profanity' at line 5: profanity                                                                                                                                                                            
  Would change file ./changelog.md:                                                                                                                                                                                 
    *** before ./changelog.md                                                                                                                                                                                       
    --- after ./changelog.md                                                                                                                                                                                        
    ***************                                                                                                                                                                                                 
    *** 2,5 ****                                                                                                                                                                                                    
                                                                                                                                                                                                                    
      ## [2.21.1 (unreleased)](https://github.com/kdeldycke/workflows/compare/v2.21.0...main)                                                                                                                       
                                                                                                                                                                                                                    
    ! - Test profanity.                                                                                                                                                                                             
    --- 2,5 ----                                                                                                                                                                                                    
                                                                                                                                                                                                                    
      ## [2.21.1 (unreleased)](https://github.com/kdeldycke/workflows/compare/v2.21.0...main)                                                                                                                       
                                                                                                                                                                                                                    
    ! - Test XXX.                                                                                                                                                                                                   
                                                                                                                                                                                                                    
File ./changelog.md: replace `profanity` with `XXX`                                                                                                                                                                 
  Found 'profanity' at line 5: profanity                                                                                                                                                                            
  Would change file ./changelog.md:                                                                                                                                                                                 
    *** before ./changelog.md                                                                                                                                                                                       
    --- after ./changelog.md                                                                                                                                                                                        
    ***************                                                                                                                                                                                                 
    *** 2,5 ****                                                                                                                                                                                                    
                                                                                                                                                                                                                    
      ## [2.21.1 (unreleased)](https://github.com/kdeldycke/workflows/compare/v2.21.0...main)                                                                                                                       
                                                                                                                                                                                                                    
    ! - Test profanity.                                                                                                                                                                                             
    --- 2,5 ----                                                                                                                                                                                                    
                                                                                                                                                                                                                    
      ## [2.21.1 (unreleased)](https://github.com/kdeldycke/workflows/compare/v2.21.0...main)                                                                                                                       
                                                                                                                                                                                                                    
    ! - Test XXX.    

It works as expected, with the only small annoyance that the replacement action seems to be called twice. Maybe this is just a detail of the way the replacement action is reported, or it might indicate a trickier problem. Anyway.

Now instead of XXX, I want to remove the profanity entirely, and replace it by an empty string.

So here I call the same CLI as above, but use the --replace "" option instead:

$ bump-my-version replace --dry-run --verbose --no-configured-files --allow-dirty --ignore-missing-version --search "profanity" --replace "" ./changelog.md
Starting BumpVersion 0.15.4                                                                                                                                                                                         
Reading configuration                                                                                                                                                                                               
  Reading config file: /Users/kde/bump_test/pyproject.toml                                                                                                                                                          
Parsing version '2.21.1' using regexp '(?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)'                                                                                                                              
  Parsed the following values: major=2, minor=21, patch=1                                                                                                                                                           
                                                                                                                                                                                                                    
File ./changelog.md: replace `profanity` with `{new_version}`                                                                                                                                                       
  Found 'profanity' at line 5: profanity                                                                                                                                                                            
  Would change file ./changelog.md:                                                                                                                                                                                 
    *** before ./changelog.md                                                                                                                                                                                       
    --- after ./changelog.md                                                                                                                                                                                        
    ***************                                                                                                                                                                                                 
    *** 2,5 ****                                                                                                                                                                                                    
                                                                                                                                                                                                                    
      ## [2.21.1 (unreleased)](https://github.com/kdeldycke/workflows/compare/v2.21.0...main)                                                                                                                       
                                                                                                                                                                                                                    
    ! - Test profanity.                                                                                                                                                                                             
    --- 2,5 ----                                                                                                                                                                                                    
                                                                                                                                                                                                                    
      ## [2.21.1 (unreleased)](https://github.com/kdeldycke/workflows/compare/v2.21.0...main)                                                                                                                       
                                                                                                                                                                                                                    
    ! - Test 2.21.1.                                                                                                                                                                                                
                                                                                                                                                                                                                    
File ./changelog.md: replace `profanity` with `blah_blah_blah`                                                                                                                                                      
  Found 'profanity' at line 5: profanity                                                                                                                                                                            
  Would change file ./changelog.md:                                                                                                                                                                                 
    *** before ./changelog.md                                                                                                                                                                                       
    --- after ./changelog.md                                                                                                                                                                                        
    ***************                                                                                                                                                                                                 
    *** 2,5 ****                                                                                                                                                                                                    
                                                                                                                                                                                                                    
      ## [2.21.1 (unreleased)](https://github.com/kdeldycke/workflows/compare/v2.21.0...main)                                                                                                                       
                                                                                                                                                                                                                    
    ! - Test profanity.                                                                                                                                                                                             
    --- 2,5 ----                                                                                                                                                                                                    
                                                                                                                                                                                                                    
      ## [2.21.1 (unreleased)](https://github.com/kdeldycke/workflows/compare/v2.21.0...main)                                                                                                                       
                                                                                                                                                                                                                    
    ! - Test blah_blah_blah.                                                                                                                                                                                        

I expect there the changed line in ./changelog.md to be - Test ., but instead, I get two conflicting results:

• the first in which profanity is replaced by the current version (2.21.1)
• the second in which profanity is replaced by the unrelated blah_blah_blah string that has been hard-coded in the pyproject.toml file

By the nature of this edge-case, it feels like somewhere in the code path, the empty string passed to --replace is normalized to None, as if --replace hasn't been used at all.

[kdeldycke]

By the nature of this edge-case, it feels like somewhere in the code path, the empty string passed to --replace is normalized to None, as if --replace hasn't been used at all.

That's indeed the case: --replace "" is interpreted as the absence of --replace option altogether.

The same CLI as above, without the --replace "" option produce the same results:

$ bump-my-version replace --dry-run --verbose --no-configured-files --allow-dirty --ignore-missing-version --search "profanity" ./changelog.md
Starting BumpVersion 0.15.4                                                                                                                                                                                         
Reading configuration                                                                                                                                                                                               
  Reading config file: /Users/kde/bump_test/pyproject.toml                                                                                                                                                          
Parsing version '2.21.1' using regexp '(?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)'                                                                                                                              
  Parsed the following values: major=2, minor=21, patch=1                                                                                                                                                           
                                                                                                                                                                                                                    
File ./changelog.md: replace `profanity` with `{new_version}`                                                                                                                                                       
  Found 'profanity' at line 5: profanity                                                                                                                                                                            
  Would change file ./changelog.md:                                                                                                                                                                                 
    *** before ./changelog.md                                                                                                                                                                                       
    --- after ./changelog.md                                                                                                                                                                                        
    ***************                                                                                                                                                                                                 
    *** 2,5 ****                                                                                                                                                                                                    
                                                                                                                                                                                                                    
      ## [2.21.1 (unreleased)](https://github.com/kdeldycke/workflows/compare/v2.21.0...main)                                                                                                                       
                                                                                                                                                                                                                    
    ! - Test profanity.                                                                                                                                                                                             
    --- 2,5 ----                                                                                                                                                                                                    
                                                                                                                                                                                                                    
      ## [2.21.1 (unreleased)](https://github.com/kdeldycke/workflows/compare/v2.21.0...main)                                                                                                                       
                                                                                                                                                                                                                    
    ! - Test 2.21.1.                                                                                                                                                                                                
                                                                                                                                                                                                                    
File ./changelog.md: replace `profanity` with `blah_blah_blah`                                                                                                                                                      
  Found 'profanity' at line 5: profanity                                                                                                                                                                            
  Would change file ./changelog.md:                                                                                                                                                                                 
    *** before ./changelog.md                                                                                                                                                                                       
    --- after ./changelog.md                                                                                                                                                                                        
    ***************                                                                                                                                                                                                 
    *** 2,5 ****                                                                                                                                                                                                    
                                                                                                                                                                                                                    
      ## [2.21.1 (unreleased)](https://github.com/kdeldycke/workflows/compare/v2.21.0...main)                                                                                                                       
                                                                                                                                                                                                                    
    ! - Test profanity.                                                                                                                                                                                             
    --- 2,5 ----                                                                                                                                                                                                    
                                                                                                                                                                                                                    
      ## [2.21.1 (unreleased)](https://github.com/kdeldycke/workflows/compare/v2.21.0...main)                                                                                                                       
                                                                                                                                                                                                                    
    ! - Test blah_blah_blah.                                   
                                                                                                                                                     

[coordt]

Thanks for noticing this. I should be able to tackle this tomorrow.

[kdeldycke]

Thanks @coordt for the fix! I can confirm v0.16.1 fix this issue! 🎉