feat: Show top committers (#49)

Author: alex289

Cargo.toml

@@ -3,7 +3,7 @@ name = "git-commit-stats"
 version = "0.1.22"
 edition = "2021"
 authors = ["Alexander Konietzko <me@alexanderkonietzko.com>"]
-license-file = "LICENSE"
+license = "MIT"
 description = "A tool to analyze git commits"
 readme = "README.md"
 homepage = "https://github.com/alex289/git-commit-stats"

README.md

@@ -28,6 +28,11 @@ update: 77
 Commit activity:
 Most active day: 05-01-2024 with 33 commits
 Most active hour: 14 with 19 commits
+
+Top 3 committers:
+Alex: 88
+alex289: 36
+github-actions[bot]: 23
 ```
 
 ## Features
@@ -61,12 +66,20 @@ A tool to analyze git commits
 Usage: git-commit-stats [OPTIONS]
 
 Options:
-  -r, --repo-path <REPO_PATH>  Path to the Git repository (default = current directory) [default: ]
-  -a, --after <AFTER>          Commit hash which commits should be analyzed (default = all) [default: ]
-  -b, --before <BEFORE>        Commit hash before which commits should be analyzed (default = all) [default: ]
-  -u, --user <USER>            User name for commit analysis (default = git config user.name) [default: ]
-  -h, --help                   Print help
-  -V, --version                Print version
+  -r, --repo-path <REPO_PATH>
+          Path to the Git repository (default = current directory) [default: ]
+  -a, --after <AFTER>
+          Commit hash which commits should be analyzed (default = all) [default: ]
+  -b, --before <BEFORE>
+          Commit hash before which commits should be analyzed (default = all) [default: ]
+  -u, --user <USER>
+          User name for commit analysis (default = git config user.name) [default: ]
+  -t, --top-committers <TOP_COMMITTERS>
+          Amount of of top committers to show (default = 3) [default: 3]
+  -h, --help
+          Print help
+  -V, --version
+          Print version
 ```
 
 ### Contributing

src/analyzer.rs

@@ -155,6 +155,25 @@ pub(crate) fn show_coding_habits(commits: &Vec<Commit>) {
     );
 }
 
+pub(crate) fn show_top_committers(max: usize, commits: &Vec<Commit>) {
+    let mut commit_counts: HashMap<String, usize> = HashMap::new();
+
+    for commit in commits {
+        if let Some(author_name) = commit.author().name() {
+            *commit_counts.entry(author_name.to_string()).or_insert(0) += commit.parent_count();
+        }
+    }
+
+    let mut top_committers: Vec<(&String, &usize)> = commit_counts.iter().collect();
+
+    top_committers.sort_by(|a, b| b.1.cmp(a.1));
+
+    println!("Top {} committers:", max);
+    for (name, count) in top_committers.iter().take(max) {
+        println!("{}: {}", name, count);
+    }
+}
+
 /// Get the user name from the Git configuration.
 pub(crate) fn get_user_name() -> String {
     git2::Config::open_default()

src/main.rs

@@ -22,6 +22,10 @@ struct Args {
     /// User name for commit analysis (default = git config user.name)
     #[arg(short, long, default_value = "")]
     user: String,
+
+    /// Amount of of top committers to show (default = 3)
+    #[arg(short, long, default_value_t = 3)]
+    top_committers: usize,
 }
 
 fn main() {
@@ -81,6 +85,8 @@ fn main() {
     analyzer::show_commit_stats(&stats);
     println!();
     analyzer::show_coding_habits(&commits_vec);
+    println!();
+    analyzer::show_top_committers(args.top_committers, &commits_vec);
 }
 
 /// Check if the specified path is a directory and a Git repository.