Small util for analyze .git diff between commits

gitdiff.sh

 #!/bin/bash 
comm1="release/v1.0"
comm2="release/v0.7"
working_dir="Android/insta"
report_file="report.txt"

# TODO: Add more information about diff:
# 1) APK size
# 2) Build time (cold running)
# 3) Amount of commits in between
# 4) Sum cloc reports in fetch_report_for_commit()
# 5) Brand new files / completely removed files
# 6) Provide top config via args

fetch_report_for_commit () {
    git checkout $1 > /dev/null 2>&1
    echo "Gathering info from commit $1 ..."
    echo -e "\nStats for commit $1:" >> $2
    echo -e "Info about XML layouts:" >> $2
    cloc . --by-percent cmb \
        --include-lang=XML \
        --exclude-dir=build \
        --match-d="res\/(layout).*" \
        --skip-uniqueness \
        --quiet | sed '/github/,$!d' | sed -n '1!p' >> $2
    echo -e "Info about Kotlin codebase:" >> $2
    cloc . --by-percent cmb \
        --include-lang=Kotlin,Java \
        --exclude-dir=build . \
        --quiet | sed '/github/,$!d' | sed -n '1!p' >> $2
}

cd $working_dir

echo "Gathering diff between $comm1 and $comm2 ..."
echo -e "Diffing:" > $report_file
git diff --stat $comm1 $comm2 >> $report_file
cloc --git --diff \
    --by-percent cmb \
    --include-lang=XML,Kotlin,Java \
    --exclude-dir=build $comm1 $comm2 \
    --sum-one \
    | sed '/github/,$!d' | sed -n '1!p' >> $report_file

echo -e "\n\n" >> $report_file
fetch_report_for_commit $comm1 $report_file

echo -e "\n\n" >> $report_file
fetch_report_for_commit $comm2 $report_file