@@ -0,0 +1,302 @@
+use std::str::FromStr;
+use std::sync::{Arc, LazyLock};
+
+use anyhow::{bail, Context, Result};
+use async_trait::async_trait;
+use futures::AsyncReadExt;
+use git::{
+ BuildCommitPermalinkParams, BuildPermalinkParams, GitHostingProvider, ParsedGitRemote,
+ PullRequest, RemoteUrl,
+};
+use gpui::SharedString;
+use http_client::{AsyncBody, HttpClient, HttpRequestExt, Request};
+use regex::Regex;
+use serde::Deserialize;
+use url::Url;
+
+const CHROMIUM_REVIEW_URL: &str = "https://chromium-review.googlesource.com";
+
+/// Parses Gerrit URLs like
+/// https://chromium-review.googlesource.com/c/chromium/src/+/3310961.
+fn pull_request_regex() -> &'static Regex {
+ static PULL_REQUEST_NUMBER_REGEX: LazyLock<Regex> = LazyLock::new(|| {
+ Regex::new(&format!(
+ r#"Reviewed-on: ({CHROMIUM_REVIEW_URL}/c/(.*)/\+/(\d+))"#
+ ))
+ .unwrap()
+ });
+ &PULL_REQUEST_NUMBER_REGEX
+}
+
+/// https://gerrit-review.googlesource.com/Documentation/rest-api-changes.html
+#[derive(Debug, Deserialize)]
+struct ChangeInfo {
+ owner: AccountInfo,
+}
+
+#[derive(Debug, Deserialize)]
+pub struct AccountInfo {
+ #[serde(rename = "_account_id")]
+ id: u64,
+}
+
+pub struct Chromium;
+
+impl Chromium {
+ async fn fetch_chromium_commit_author(
+ &self,
+ _repo: &str,
+ commit: &str,
+ client: &Arc<dyn HttpClient>,
+ ) -> Result<Option<AccountInfo>> {
+ let url = format!("{CHROMIUM_REVIEW_URL}/changes/{commit}");
+
+ let request = Request::get(&url)
+ .header("Content-Type", "application/json")
+ .follow_redirects(http_client::RedirectPolicy::FollowAll);
+
+ let mut response = client
+ .send(request.body(AsyncBody::default())?)
+ .await
+ .with_context(|| format!("error fetching Gerrit commit details at {:?}", url))?;
+
+ let mut body = Vec::new();
+ response.body_mut().read_to_end(&mut body).await?;
+
+ if response.status().is_client_error() {
+ let text = String::from_utf8_lossy(body.as_slice());
+ bail!(
+ "status error {}, response: {text:?}",
+ response.status().as_u16()
+ );
+ }
+
+ // Remove XSSI protection prefix.
+ let body_str = std::str::from_utf8(&body)?.trim_start_matches(")]}'");
+
+ serde_json::from_str::<ChangeInfo>(body_str)
+ .map(|change| Some(change.owner))
+ .context("failed to deserialize Gerrit change info")
+ }
+}
+
+#[async_trait]
+impl GitHostingProvider for Chromium {
+ fn name(&self) -> String {
+ "Chromium".to_string()
+ }
+
+ fn base_url(&self) -> Url {
+ Url::parse("https://chromium.googlesource.com").unwrap()
+ }
+
+ fn supports_avatars(&self) -> bool {
+ true
+ }
+
+ fn format_line_number(&self, line: u32) -> String {
+ format!("{line}")
+ }
+
+ fn format_line_numbers(&self, start_line: u32, _end_line: u32) -> String {
+ format!("{start_line}")
+ }
+
+ fn parse_remote_url(&self, url: &str) -> Option<ParsedGitRemote> {
+ let url = RemoteUrl::from_str(url).ok()?;
+
+ let host = url.host_str()?;
+ if host != self.base_url().host_str()? {
+ return None;
+ }
+
+ let path_segments = url.path_segments()?.collect::<Vec<_>>();
+ let joined_path = path_segments.join("/");
+ let repo = joined_path.trim_end_matches(".git");
+
+ Some(ParsedGitRemote {
+ owner: Arc::from(""),
+ repo: repo.into(),
+ })
+ }
+
+ fn build_commit_permalink(
+ &self,
+ remote: &ParsedGitRemote,
+ params: BuildCommitPermalinkParams,
+ ) -> Url {
+ let BuildCommitPermalinkParams { sha } = params;
+ let ParsedGitRemote { owner: _, repo } = remote;
+
+ self.base_url().join(&format!("{repo}/+/{sha}")).unwrap()
+ }
+
+ fn build_permalink(&self, remote: ParsedGitRemote, params: BuildPermalinkParams) -> Url {
+ let ParsedGitRemote { owner: _, repo } = remote;
+ let BuildPermalinkParams {
+ sha,
+ path,
+ selection,
+ } = params;
+
+ let mut permalink = self
+ .base_url()
+ .join(&format!("{repo}/+/{sha}/{path}"))
+ .unwrap();
+ permalink.set_fragment(
+ selection
+ .map(|selection| self.line_fragment(&selection))
+ .as_deref(),
+ );
+ permalink
+ }
+
+ fn extract_pull_request(&self, remote: &ParsedGitRemote, message: &str) -> Option<PullRequest> {
+ let capture = pull_request_regex().captures(message)?;
+ let url = Url::parse(capture.get(1)?.as_str()).unwrap();
+ let repo = capture.get(2)?.as_str();
+ if repo != remote.repo.as_ref() {
+ return None;
+ }
+
+ let number = capture.get(3)?.as_str().parse::<u32>().ok()?;
+
+ Some(PullRequest { number, url })
+ }
+
+ async fn commit_author_avatar_url(
+ &self,
+ _repo_owner: &str,
+ repo: &str,
+ commit: SharedString,
+ http_client: Arc<dyn HttpClient>,
+ ) -> Result<Option<Url>> {
+ let commit = commit.to_string();
+ let Some(author) = self
+ .fetch_chromium_commit_author(repo, &commit, &http_client)
+ .await?
+ else {
+ return Ok(None);
+ };
+
+ let mut avatar_url = Url::parse(&format!(
+ "{CHROMIUM_REVIEW_URL}/accounts/{}/avatar",
+ &author.id
+ ))?;
+ avatar_url.set_query(Some("size=128"));
+
+ Ok(Some(avatar_url))
+ }
+}
+
+#[cfg(test)]
+mod tests {
+ use indoc::indoc;
+ use pretty_assertions::assert_eq;
+
+ use super::*;
+
+ #[test]
+ fn test_parse_remote_url_given_https_url() {
+ let parsed_remote = Chromium
+ .parse_remote_url("https://chromium.googlesource.com/chromium/src")
+ .unwrap();
+
+ assert_eq!(
+ parsed_remote,
+ ParsedGitRemote {
+ owner: Arc::from(""),
+ repo: "chromium/src".into(),
+ }
+ );
+ }
+
+ #[test]
+ fn test_build_chromium_permalink() {
+ let permalink = Chromium.build_permalink(
+ ParsedGitRemote {
+ owner: Arc::from(""),
+ repo: "chromium/src".into(),
+ },
+ BuildPermalinkParams {
+ sha: "fea5080b182fc92e3be0c01c5dece602fe70b588",
+ path: "ui/base/cursor/cursor.h",
+ selection: None,
+ },
+ );
+
+ let expected_url = "https://chromium.googlesource.com/chromium/src/+/fea5080b182fc92e3be0c01c5dece602fe70b588/ui/base/cursor/cursor.h";
+ assert_eq!(permalink.to_string(), expected_url.to_string())
+ }
+
+ #[test]
+ fn test_build_chromium_permalink_with_single_line_selection() {
+ let permalink = Chromium.build_permalink(
+ ParsedGitRemote {
+ owner: Arc::from(""),
+ repo: "chromium/src".into(),
+ },
+ BuildPermalinkParams {
+ sha: "fea5080b182fc92e3be0c01c5dece602fe70b588",
+ path: "ui/base/cursor/cursor.h",
+ selection: Some(18..18),
+ },
+ );
+
+ let expected_url = "https://chromium.googlesource.com/chromium/src/+/fea5080b182fc92e3be0c01c5dece602fe70b588/ui/base/cursor/cursor.h#19";
+ assert_eq!(permalink.to_string(), expected_url.to_string())
+ }
+
+ #[test]
+ fn test_build_chromium_permalink_with_multi_line_selection() {
+ let permalink = Chromium.build_permalink(
+ ParsedGitRemote {
+ owner: Arc::from(""),
+ repo: "chromium/src".into(),
+ },
+ BuildPermalinkParams {
+ sha: "fea5080b182fc92e3be0c01c5dece602fe70b588",
+ path: "ui/base/cursor/cursor.h",
+ selection: Some(18..30),
+ },
+ );
+
+ let expected_url = "https://chromium.googlesource.com/chromium/src/+/fea5080b182fc92e3be0c01c5dece602fe70b588/ui/base/cursor/cursor.h#19";
+ assert_eq!(permalink.to_string(), expected_url.to_string())
+ }
+
+ #[test]
+ fn test_chromium_pull_requests() {
+ let remote = ParsedGitRemote {
+ owner: Arc::from(""),
+ repo: "chromium/src".into(),
+ };
+
+ let message = "This does not contain a pull request";
+ assert!(Chromium.extract_pull_request(&remote, message).is_none());
+
+ // Pull request number at end of "Reviewed-on:" line
+ let message = indoc! {r#"
+ Test commit header
+
+ Test commit description with multiple
+ lines.
+
+ Bug: 1193775, 1270302
+ Change-Id: Id15e9b4d75cce43ebd5fe34f0fb37d5e1e811b66
+ Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3310961
+ Reviewed-by: Test reviewer <test@example.com>
+ Cr-Commit-Position: refs/heads/main@{#1054973}
+ "#
+ };
+
+ assert_eq!(
+ Chromium
+ .extract_pull_request(&remote, &message)
+ .unwrap()
+ .url
+ .as_str(),
+ "https://chromium-review.googlesource.com/c/chromium/src/+/3310961"
+ );
+ }
+}