Run hook on pull_request events too.

The check_suite event is only triggered for the
repository on which the commit is pushed, not on
the source of the fork.

src/github.rs

@@ -16,7 +16,7 @@ use codespan_reporting::{
     files::Files,
 };
 use eyre::Context;
-use hook::CheckRunPayload;
+use hook::{CheckRunPayload, PullRequestAction, PullRequestPayload};
 use jwt_simple::prelude::*;
 use pr::{AnyPullRequest, MinimalPullRequest, PullRequest, PullRequestUpdate};
 use tracing::{debug, error, info, warn};
@@ -167,6 +167,15 @@ async fn github_hook<G: GitHubAuth>(
             check_run.check_suite.pull_requests.pop(),
             Some(check_run),
         ),
+        HookPayload::PullRequest(PullRequestPayload {
+            action: PullRequestAction::Opened | PullRequestAction::Synchronize,
+            pull_request,
+            ..
+        }) => (
+            pull_request.head.sha.clone(),
+            Some(AnyPullRequest::Full(pull_request)),
+            None,
+        ),
         HookPayload::CheckRun(_)
         | HookPayload::CheckSuite(CheckSuitePayload {
             action: CheckSuiteAction::Completed,

src/github/api/hook.rs

@@ -8,6 +8,7 @@ use crate::github::AppState;
 
 use super::{
     check::{CheckRun, CheckRunAction, CheckSuite, CheckSuiteAction},
+    pr::PullRequest,
     AsInstallation, Installation,
 };
 
@@ -16,6 +17,7 @@ pub enum HookPayload {
     Installation(InstallationPayload),
     CheckSuite(CheckSuitePayload),
     CheckRun(CheckRunPayload),
+    PullRequest(PullRequestPayload),
 }
 
 impl HookPayload {
@@ -24,6 +26,7 @@ impl HookPayload {
             HookPayload::CheckSuite(cs) => &cs.installation,
             HookPayload::Installation(i) => &i.installation,
             HookPayload::CheckRun(cr) => &cr.installation,
+            HookPayload::PullRequest(pr) => &pr.installation,
         }
     }
 }
@@ -113,6 +116,7 @@ impl FromRequest<AppState> for HookPayload {
             Some(b"installation") => try_deser!(Installation, &raw_payload),
             Some(b"check_suite") => try_deser!(CheckSuite, &raw_payload),
             Some(b"check_run") => try_deser!(CheckRun, &raw_payload),
+            Some(b"pull_request") => try_deser!(PullRequest, &raw_payload),
             Some(x) => {
                 debug!(
                     "Uknown event type: {}",
@@ -144,3 +148,17 @@ pub struct CheckRunPayload {
     pub action: CheckRunAction,
     pub check_run: CheckRun,
 }
+
+#[derive(Debug, Deserialize)]
+pub struct PullRequestPayload {
+    pub installation: Installation,
+    pub action: PullRequestAction,
+    pub pull_request: PullRequest,
+}
+
+#[derive(Debug, Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum PullRequestAction {
+    Opened,
+    Synchronize,
+}