Git: Rename or move all files at once

Question

I want to rename all erb files in my Git project to haml.(like index.html.erb to index.html.haml)

If I rename each file, I have to type the following command more than thirty times.

$ git mv app/views/pages/index.html.erb app/views/pages/index.html.haml

I tried the command below, but it did not work.

$ git mv app/views/**/*.erb app/views/**/*.haml

usage: git mv [options] <source>... <destination>

    -n, --dry-run         dry run
    -f, --force           force move/rename even if target exists
    -k                    skip move/rename errors

How can I rename them at once?

Answer 1

for i in $(find . -iname "*.erb"); do
    git mv "$i" "$(echo $i | rev | cut -d '.' -f 2- | rev).haml";
done

For each .erb file, git mv it to itself with the extension ".erb" replaced by ".haml".

Answer 2

A one liner using powershell

Dir *.erb -Recurse | foreach { git mv $_.FullName $_.FullName.replace("erb", "haml")}