The different EOL behavior between ...

git	Version	EOL behavior
Official Git	2.0.0	Mixed EOL
Git for Windows	1.9.4	Mixed EOL
libgit2-based software	0.21.0-rc1	All CRLF

Testing Repsoitory

1. Set core.autocrlf = false
2. Add/Commit all files with different EOLs
3. Set core.autocrlf = true

Tests and Results

Official Git 2.0.0 (using Vagrant)

Based on https://github.com/msysgit/msysgit/wiki/Vagrant

1. Installe Virtual Box
2. Installe Vagrant
3. Run C:\msysGit\msys.bat
4. Run vagrant up
5. Run vagrant ssh
6. Run sudo apt-get install python-software-properties
7. Run sudo add-apt-repository ppa:git-core/ppa
8. Run sudo apt-get update
9. Run sudo apt-get install git
10. Run git --version shows git version 2.0.0
11. Run cd /vagrant
12. Run git clone https://github.com/YueLinHo/TestAutoCrlf.git
13. Run cd TestAutoCrlf
14. Run git config core.autocrlf true
15. Delete all files in the working tree via Windows Explorer.
16. Run git checkout HEAD -f -- "MIX-more_LF.txt"

• Got the file with mixed EOLs

17. Run git checkout HEAD -f -- "MIX-more_CRLF.txt"

• Got the file with mixed EOLs

(Check the EOL via Notepad++ on Windows)

Double check : Run Step 3-5, 10-11, 13-17

Git for Windows 1.9.4

$ git checkout HEAD -f -- "MIX-more_LF.txt"
$ git checkout HEAD -f -- "MIX-more_CRLF.txt"

Still mixed EOLs

TortiseGit 1.8.9.0 / Revert (Using Git for Windows)

1. Delete them
2. TortiseGit -> Revert

Still mixed EOLs

TortoiseGit 1.8.9.0 : Save revision to... (Using libgit2)

1. Open TortoiseGit Log Message dialog
2. Click the commit which add all file
3. Right click on testing file
4. Click "Save revision to..."

All CRLF EOLs

Other information

I use VS2013 to trace the source code. Called function are:

• git_blob_filtered_content() of blob.c
  • git_filter_list_apply_to_blob() of filter.c
    • git_filter_list_apply_to_data() of filter.c
      • fe->filter->apply() (crlf_apply() of crlf.c)
        • crlf_apply_to_workdir() of crlf.c
          • line_ending() of crlf.c
          • git_buf_text_lf_to_crlf() of buf_text.c
            • git_buf_put() of buffer.c

And...

in the line_ending(),

ca->crlf_action is -1 (GIT_CRLF_GUESS)

ca->eol is 0 (GIT_EOL_UNSET)

And line_ending() return "\r\n" finally. (GIT_EOL_NATIVE == GIT_EOL_CRLF is true)

Maybe I will re-trace the source code to get where the var ca is set.