git diff two branches change

diff-branch.sh

#!/bin/bash

max_log_entries=30

# Get the list of branches
branches=$(git for-each-ref --sort='-committerdate:iso8601' --format '%(refname:short)' refs/heads/)


# Display branch list for user selection
PS3="Select two branches for file changes: "

options=()
# IFS=$'\n'
select branch in $branches; do
    options+=("$branch")
    if [ ${#options[@]} -eq 2 ]; then
        break
    fi
done
# unset IFS 

# Get the commit hashes of the selected branches
commit1=$(git rev-parse ${options[0]})
commit2=$(git rev-parse ${options[1]})

mkdir -p diff

# Use commit hashes for git diff
files=$(git diff --name-only $commit1 $commit2)

# copy files to diff folder
for file in $files
do
    # get relative path
    relative_path=$(dirname $file)

    # create folder
    mkdir -p diff/$relative_path

    # copy file
    cp $file diff/$relative_path
done

echo "Modified files between selected branches copied to diff folder."