How to count total lines changed by a specific author in a Git repository?

Question

Is there a command I can invoke which will count the lines changed by a specific author in a Git repository? I know that there must be ways to count the number of commits as Github does this for their Impact graph.

Answer 1

This gives some statistics about the author, modify as required.

Using Gawk:

git log --author="_Your_Name_Here_" --pretty=tformat: --numstat \ | gawk '{ add += $1; subs += $2; loc += $1 - $2 } END { printf "added lines: %s removed lines: %s total lines: %s\n", add, subs, loc }' - 

Using Awk on Mac OSX:

git log --author="_Your_Name_Here_" --pretty=tformat: --numstat | awk '{ add += $1; subs += $2; loc += $1 - $2 } END { printf "added lines: %s, removed lines: %s, total lines: %s\n", add, subs, loc }' - 

---

Using count-lines git-alias:

Simply create count-lines alias (once per system), like:

git config --global alias.count-lines "! git log --author=\"\$1\" --pretty=tformat: --numstat | awk '{ add += \$1; subs += \$2; loc += \$1 - \$2 } END { printf \"added lines: %s, removed lines: %s, total lines: %s\n\", add, subs, loc }' #" 

And use each time later, like:

git count-lines [email protected] 

For Windows, works after adding Git-Bash to PATH (environment-variable).
For Linux, maybe replace awk part with gawk.
For MacOS, works without any change.

Using exiting script ^{(Update 2017)}

There is a new package on github that looks slick and uses bash as dependencies (tested on linux). It's more suitable for direct usage rather than scripts.

It's git-quick-stats (github link).

Copy git-quick-stats to a folder and add the folder to path.

mkdir ~/source cd ~/source git clone [email protected]:arzzen/git-quick-stats.git mkdir ~/bin ln -s ~/source/git-quick-stats/git-quick-stats ~/bin/git-quick-stats chmod +x ~/bin/git-quick-stats export PATH=${PATH}:~/bin 

Usage:

git-quick-stats