Interactive bash script to find diffs only in files from your feature between stage with multiple features.

interactive_diff_feature_staging.sh

#!/bin/bash

STAGING_BRANCH=staging
DEVELOP_BRANCH=develop
BRANCH_NAME=`git branch --list | fzf`
COMMON_PARENT_COMMIT_HASH=`git merge-base $BRANCH_NAME $DEVELOP_BRANCH`
FILES_LIST=`comm -12 <(git diff $BRANCH_NAME $STAGING_BRANCH --name-only) <(git diff $COMMON_PARENT_COMMIT_HASH $BRANCH_NAME --name-only)`
function diff_or_die {
  if [ -z $1 ]; then
    exit
  fi
  git diff $STAGING_BRANCH $BRANCH_NAME -- $1
}

function ask_for_diff {
  while true; do
     local SELECTED_FILE=$(printf '%s\n' "${FILES_LIST[@]}" | fzf)
     diff_or_die $SELECTED_FILE
  done
}

ask_for_diff