generate_build_filelists

#!/bin/bash
#
# This script compiles kernel and collects a list of complite-time files and related Git metadata
# for each newly added line from tag 1 to tag 2.

set -e

show_help() {
    echo "Usage: ./generate_build_filelists [tag1] [tag2] [clone-path]"
    echo "Example: ./generate_build_filelists.h tag1 tag2 clone_path"
    echo
    echo "Options:"
    echo "  tag1    Required. old_tag."
    echo "  tag2    Required. new_tag."
    echo "  clone_path Requred. the path to clone the linux repo to apply change diff analysis."
    echo "  -h      Display this help message"
    exit 0
}

display_file_head() {
    local dir_name="$1"
    local file_name="$2"
    local line_num="$3"

    echo "First $line_num lines of $file_name:"
    head -n "$line_num" "$dir_name/$file_name"
    echo
}

export -f display_file_head

if [[ "$1" == "-h" ]]; then
    show_help
fi

# Ensure required arguments (tag1 and tag2) are provided
if [ -z "$1" ] || [ -z "$2" ] || [ -z "$3" ]; then
    show_help
fi

TAG1="$1"
TAG2="$2"
CLONE_PATH="$3"
SUBSYS="$4"

mkdir -p "build_data"

curr_dir=$(pwd)
echo "$curr_dir"
export curr_dir

export CLONE_PATH
cd "$CLONE_PATH"

bash "$curr_dir"/build_scripts/build_collect_diff "$TAG1" "$TAG2" "$SUBSYS"
echo "Finishing generating build source file lists"

# Fetch email and name pairing information for linux contributor
bash "$curr_dir"/build_scripts/git_shortlog "$TAG2"
display_file_head "$curr_dir/build_data" "name_list.txt" 3
echo "finished generating email and name list"


# Reframe the git diff report for javascript front-end syntax
input_file="$curr_dir/build_data/filtered_diff_header.txt"
output_file="$curr_dir/build_data/filtered_diff_header_replace.txt"
sed 's/\\/\\\\/g' "$input_file" > "$output_file"
display_file_head "$curr_dir/build_data" "filtered_diff_header_replace.txt" 3

input_file="$curr_dir/build_data/filtered_diff_source.txt"
output_file="$curr_dir/build_data/filtered_diff_source_replace.txt"
sed 's/\\/\\\\/g' "$input_file" > "$output_file"
display_file_head "$curr_dir/build_data" "filtered_diff_source_replace.txt" 3


# Retrieve and tokenize commit info per added line
echo "tokenizing each commit line ..."
git checkout "$TAG2"
"$curr_dir"/build_scripts/tokenize "$curr_dir/build_data/filtered_diff_header.txt" "$curr_dir/build_data/tokenize_header.json" "$TAG1" "$TAG2"
"$curr_dir"/build_scripts/tokenize "$curr_dir/build_data/filtered_diff_source.txt" "$curr_dir/build_data/tokenize_source.json" "$TAG1" "$TAG2"
display_file_head "$curr_dir/build_data" "tokenize_source.json" 3
display_file_head "$curr_dir/build_data" "tokenize_header.json" 3
echo "finished tokenization"