1 files changed, 86 insertions, 0 deletions
diff --git a/docs/src/contribs.rs b/docs/src/contribs.rs
new file mode 100644
index 00000000..58a730e2
--- /dev/null
+++ b/docs/src/contribs.rs
@@ -0,0 +1,86 @@
+use std::cmp::Reverse;
+use std::collections::HashMap;
+use std::fmt::Write;
+
+use serde::{Deserialize, Serialize};
+
+use crate::{Html, Resolver};
+
+/// Build HTML detailing the contributors between two tags.
+pub fn contributors(resolver: &dyn Resolver, from: &str, to: &str) -> Option<Html> {
+    let staff = ["laurmaedje", "reknih"];
+
+    // Determine number of contributions per person.
+    let mut contributors = HashMap::<String, Contributor>::new();
+    for commit in resolver.commits(from, to) {
+        contributors
+            .entry(commit.author.login.clone())
+            .or_insert_with(|| Contributor {
+                login: commit.author.login,
+                avatar: commit.author.avatar_url,
+                contributions: 0,
+            })
+            .contributions += 1;
+    }
+
+    // Keep only non-staff people.
+    let mut contributors: Vec<_> = contributors
+        .into_values()
+        .filter(|c| !staff.contains(&c.login.as_str()))
+        .collect();
+
+    // Sort by highest number of commits.
+    contributors.sort_by_key(|c| (Reverse(c.contributions), c.login.clone()));
+    if contributors.is_empty() {
+        return None;
+    }
+
+    let mut html = "Thanks to everyone who contributed to this release!".to_string();
+    html += "<ul class=\"contribs\">";
+
+    for Contributor { login, avatar, contributions } in contributors {
+        let login = login.replace('\"', "&quot;").replace('&', "&amp;");
+        let avatar = avatar.replace("?v=", "?s=64&v=");
+        let s = if contributions > 1 { "s" } else { "" };
+        write!(
+            html,
+            r#"<li>
+              <a href="https://github.com/{login}" target="_blank">
+                <img
+                  width="64"
+                  height="64"
+                  src="{avatar}"
+                  alt="GitHub avatar of {login}"
+                  title="@{login} made {contributions} contribution{s}"
+                  crossorigin="anonymous"
+                >
+              </a>
+            </li>"#
+        )
+        .unwrap();
+    }
+
+    html += "</ul>";
+
+    Some(Html::new(html))
+}
+
+#[derive(Debug)]
+struct Contributor {
+    login: String,
+    avatar: String,
+    contributions: usize,
+}
+
+/// A commit on the `typst` repository.
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Commit {
+    author: Author,
+}
+
+/// A commit author.
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Author {
+    login: String,
+    avatar_url: String,
+}