How many images are we talkin’ about?
Are these images in content or in layouts?
Anyway, you’ll have to search for empty alt tags and copy the src attribute.
For content files, if you have Markdown, Jekyll will output the alt text correctly:
![alt text](https://github.com/adam-p/markdown-here/raw/master/src/common/images/icon48.png "Logo Title Text 1")
<img src="https://github.com/adam-p/markdown-here/raw/master/src/common/images/icon48.png" alt="alt text" title="Logo Title Text 1">
It’s very poor a11y to add the
src attribute to
alt tags, I can’t image a blind user using a screen reader and having to listen to the whole
image path instead of a useful information. You should try it and you’ll quickly understand why it’s a bad idea.
And some images do not need an alternative if the context provides explanation or if they are simply decoration.