git post-commit hook for committing compiled PDFs to different branch

post-commit.sh

#!/bin/bash

out="$(pwd)/out/"
changed_files=$(git diff-tree --no-commit-id --name-only -r HEAD)

do_the_work_tex() {
(
    dir="$1"
    filename="$2"
    extension="$3"
    cd "$dir"
    latexmk -xelatex -pdf -shell-escape "$filename.$extension"
    mkdir -p "$out/$dir"
    cp "$filename.pdf" "$out/$dir/$filename.pdf"
)
}

commit_the_work() {
(
    unset GIT_INDEX_FILE
    unset GIT_WORK_TREE
    unset GIT_DIR
    commit_msg=$(git log -1 --pretty=oneline)
    cd "$out"
    git add -A
    git commit -a -m "source: $commit_msg"
)
}

for fullfile in $changed_files; do
    dir=$(dirname "$fullfile")
    filename=$(basename "$fullfile")
    extension="${filename##*.}"
    filename=$(basename "$fullfile" ".$extension")
    if [ "$extension" = "tex" ]; then
        do_the_work_tex "$dir" "$filename" "$extension"
    fi    
done

commit_the_work

pre-push.sh

#!/bin/bash

unset GIT_INDEX_FILE
unset GIT_WORK_TREE
unset GIT_DIR

out="$(pwd)/out"
cd "$out"
git push