git exclude file from commit code example

Example 1: remove a file from git commit

git reset --soft HEAD^ 
or
git reset --soft HEAD~1
git reset HEAD path/to/unwanted_file
git commit -c ORIG_HEAD

Example 2: git ignore updates to file

git update-index --skip-worktree path/to/file.txt

Example 3: git exclude some files from git commit

To exclude some files from git commit
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syntax  - git update-index --assume-unchanged <filepath>
example - git update-index --assume-unchanged default/config.php

To undo the above command
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syntax  - git update-index --no-assume-unchanged <filepath>
example - git update-index --no-assume-unchanged default/config.php

Example 4: how to git ignore a file

git config --global core.excludesfile ~/.gitignore_global

Example 5: git ignore not saving changes

git rm -rf --cached .
git add .