Show log of commits affecting files matching a pattern whose diff also matches a pattern

I want to view a git log of commits that obey all of the following:

1. The commit modifies a file whose name matches a given pattern.
2. The commit changes the number of occurrences of a pattern in a file (essentially, what --pickaxe-regex -S does).
3. The change matching rule 2 does not necessarily occur in the file matching rule 1.

Basically, I want to combine Show all commits whose diff contain specific string and Find commits that modify file names matching a pattern in a GIT repository. Just combining those two techniques, as I’ve done below, satisfies rules 1 & 2, but not 3.

So far I have:

git log --pickaxe-regex -S 'ChangePattern|SomeAlternatePattern' -- '*/filename.txt'

This works as long as the change occurs in filename.txt; however, the change I am looking for is in a different file than the one that is being matched by the pattern.

>Solution :

You can combine git log and git show :

# have `git log` just output the hash of selected commits :
git log --format="%H" --pickaxe-regex -S 'ChangePattern|SomeAlternatePattern' |\
  # `git show` will not output anything if commit doesn't modify any of the files
  while read sha; do git show $sha -- '*/filename.txt'; done