A command to calculate lines of code in all tracked files in a Git repo

Count lines in Git repo

// Reference: http://stackoverflow.com/questions/4822471/count-number-of-lines-in-a-git-repository

$ git ls-files | xargs wc -l

I find this pretty useful (for public repos) https://codetabs.com/count-loc/count-loc-online.html

Plus there's an open API: https://api.codetabs.com/v1/loc?github=bluesky-social/social-app

[
 {
  "language": "TypeScript",
  "files": 620,
  "lines": 83349,
  "blanks": 5334,
  "comments": 2259,
  "linesOfCode": 75756
 },
 {
  "language": "JavaScript",
  "files": 23,
  "lines": 705,
  "blanks": 40,
  "comments": 46,
  "linesOfCode": 619
 },
 {
  "language": "SVG",
  "files": 23,
  "lines": 55,
  "blanks": 0,
  "comments": 0,
  "linesOfCode": 55
 },
 {
  "language": "Markdown",
  "files": 13,
  "lines": 689,
  "blanks": 201,
  "comments": 0,
  "linesOfCode": 488
 },
 {
  "language": "Go",
  "files": 9,
  "lines": 903,
  "blanks": 114,
  "comments": 64,
  "linesOfCode": 725
 },
 {
  "language": "JSON",
  "files": 9,
  "lines": 512,
  "blanks": 0,
  "comments": 0,
  "linesOfCode": 512
 },
 {
  "language": "Patch",
  "files": 9,
  "lines": 3968,
  "blanks": 17,
  "comments": 0,
  "linesOfCode": 3951
 },
 {
  "language": "YAML",
  "files": 8,
  "lines": 466,
  "blanks": 43,
  "comments": 30,
  "linesOfCode": 393
 },
 {
  "language": "HTML",
  "files": 7,
  "lines": 707,
  "blanks": 42,
  "comments": 16,
  "linesOfCode": 649
 },
 {
  "language": "Shell",
  "files": 5,
  "lines": 126,
  "blanks": 24,
  "comments": 25,
  "linesOfCode": 77
 },
 {
  "language": "Swift",
  "files": 5,
  "lines": 383,
  "blanks": 55,
  "comments": 41,
  "linesOfCode": 287
 },
 {
  "language": "gitignore",
  "files": 3,
  "lines": 124,
  "blanks": 23,
  "comments": 31,
  "linesOfCode": 70
 },
 {
  "language": "Makefile",
  "files": 2,
  "lines": 81,
  "blanks": 19,
  "comments": 4,
  "linesOfCode": 58
 },
 {
  "language": "Plain Text",
  "files": 2,
  "lines": 13,
  "blanks": 1,
  "comments": 0,
  "linesOfCode": 12
 },
 {
  "language": "C Header",
  "files": 1,
  "lines": 3,
  "blanks": 0,
  "comments": 0,
  "linesOfCode": 3
 },
 {
  "language": "Dockerfile",
  "files": 1,
  "lines": 74,
  "blanks": 17,
  "comments": 9,
  "linesOfCode": 48
 },
 {
  "language": "Gemfile",
  "files": 1,
  "lines": 6,
  "blanks": 2,
  "comments": 1,
  "linesOfCode": 3
 },
 {
  "language": "JSX",
  "files": 1,
  "lines": 9,
  "blanks": 1,
  "comments": 0,
  "linesOfCode": 8
 },
 {
  "language": "License",
  "files": 1,
  "lines": 7,
  "blanks": 3,
  "comments": 0,
  "linesOfCode": 4
 },
 {
  "language": "Objective C",
  "files": 1,
  "lines": 26,
  "blanks": 5,
  "comments": 0,
  "linesOfCode": 21
 },
 {
  "language": "TypeScript Typings",
  "files": 1,
  "lines": 8,
  "blanks": 0,
  "comments": 0,
  "linesOfCode": 8
 },
 {
  "language": "Total",
  "files": 745,
  "lines": 92214,
  "blanks": 5941,
  "comments": 2526,
  "linesOfCode": 83747
 }
]

An improvement based on what has already been said, by the way thanks for the tip.

Line counter for child folders with aggregator removing image files (webp|ttf|png|jpg|jpeg) :

How to use:

bash counter.sh foldername

counter.sh:

#!/bin/bash

# Root Folder
root_dir=$1

#  Count initialization
total_lines=0

# Loop
for folder in "$root_dir"/*; do
    # Check is folder
    if [ -d "$folder" ] && [ ! "$(basename "$folder")" = ".*" ] && [ -d "$folder/.git" ]; then
        # Run count command
        lines_in_folder=$(cd "$folder"; git ls-files | grep -vE '\.(webp|ttf|png|jpg|jpeg)$' | sed 's/.*/"&"/' |  xargs wc -l | grep -o "[0-9]* total" | awk '{SUM += $1} END {print SUM}')
        current_branch=$(cd "$folder"; git rev-parse --abbrev-ref HEAD)
        printf "%-80s -> %s lines\n" "$(basename "$folder") ($current_branch)" "$lines_in_folder"

        
        # Increment total lines
        total_lines=$((total_lines + lines_in_folder))
        
    fi
done

# Show total lines
echo "Total: $total_lines lines"

To only include the lines of code, can simply do

git ls-files "*.go" | xargs cat | grep -v '^\s*$' | grep -v '^\s*#' | wc -l

Just replace .go with your language's file extension. This excludes blank lines, configurations and comments so it presents an accurate number of actual lines of code.