Count code lines in git repo

count.sh

#!/bin/bash

# run
# bash <(curl https://gist.githubusercontent.com/signalwerk/7b4411c13073da371b5d3d5d4d73cc9b/raw/count.sh)

# Define the output CSV file
output_csv="code_lines.csv"

# Header for the CSV file
echo "Commit,Year,Month,Date,Total Lines,Largest File" > "$output_csv"

# Get all the commits and their dates in reverse order
commits_dates=$(git log --reverse --pretty=format:"%H,%ad" --date=short)

# Initialize variables to keep track of the previous month and year
prev_month=""
prev_year=""

# Loop through each commit and calculate the total lines of code on the first day of each month
while IFS=',' read -r commit date; do
    # Extract the day, month, and year from the commit date
    day=$(echo "$date" | cut -d'-' -f3)
    month=$(echo "$date" | cut -d'-' -f2)
    year=$(echo "$date" | cut -d'-' -f1)

    # Check if it's the first day of the month (day = 01) and a new month or year
    if [ "$month" != "$prev_month" ] || [ "$year" != "$prev_year" ]; then
        total_lines=0
        largest_file=""
        largest_file_size=0

        files=$(git ls-tree --name-only -r "$commit")

        # Loop through each file and count lines of code
        for file in $files; do
            if [[ $file =~ \.(php|js|sh|vue|ts|scss|gql|graphql|twig)$ ]] && [[ ! $file =~ /dist/ ]] && [[ ! $file =~ graphql/types ]] && [[ ! $file =~ graphql/schema ]]; then

                lines=$(git show "$commit:$file" | wc -l)
                lines=${lines//[[:blank:]]/}
                lines=$((lines + 0))
                total_lines=$((total_lines + lines))

                # Keep track of the largest file
                if [ $((lines + 0)) -gt $((largest_file_size + 0)) ]; then
                  largest_file_size=$lines
                  largest_file=$file
                fi
            fi
        done

        # Output to CSV
        echo "$commit,$year,$month,$date,$total_lines,$largest_file" >> "$output_csv"

        # Update the previous month and year variables
        prev_month=$month
        prev_year=$year
    fi
done <<< "$commits_dates"

echo "CSV file '$output_csv' generated successfully."