git-commits.md

Count Git merge commits by Author

This code counts the number of merge commits on the default branch. It only works with GitHub repositories.

The code uses LibGit2Sharp,

Install-Package LibGit2Sharp

using LibGit2Sharp;

const string repoPath = @"D:\src\pathToRepo";
const string defaultBranch = "main";
var oneYearAgo = DateTimeOffset.Now.AddMonths(-12);

// Commits to all branches including default
Dictionary<string, int> commits = new();

// Commits to the default branch
Dictionary<string, int> defaultCommits = new();

using Repository repo = new(repoPath);

var branch = repo.Branches.FirstOrDefault(b => b.FriendlyName == defaultBranch);
if (branch is null)
{
    Console.WriteLine($"{defaultBranch} not found");
    return;
}

// When the Author is a user and the Committer is GitHub, it is a merge commit from a PR
foreach (var commit in branch.Commits.Where(c => c.Author.When >= oneYearAgo && c.Committer.Name == "GitHub"))
{
    string author = commit.Author.Name;
    if (!commits.ContainsKey(author))
    {
        commits[author] = 0;
    }
    commits[author]++;
}

// Print the stats
foreach (var dev in commits.Keys)
{
    Console.WriteLine($"{dev}, {commits[dev]}");
}