From f57231bdea0af79996ff1613ab251a87004cfde3 Mon Sep 17 00:00:00 2001
From: Matthew Knight <mattnite@proton.me>
Date: Fri, 6 Mar 2026 17:08:13 -0800
Subject: [PATCH] Crash group link

---
 cmd/cairn-server/main.go  |  1 +
 internal/config/config.go |  1 +
 internal/forgejo/sync.go  | 13 ++++++++++---
 internal/web/routes.go    |  3 ++-
 4 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/cmd/cairn-server/main.go b/cmd/cairn-server/main.go
index 92d31fa..9cbc71c 100644
--- a/cmd/cairn-server/main.go
+++ b/cmd/cairn-server/main.go
@@ -58,6 +58,7 @@ func main() {
 		Store:         store,
 		ForgejoClient: forgejoClient,
 		ForgejoURL:    cfg.ForgejoURL,
+		CairnURL:      cfg.ExternalURL,
 		WebhookSecret: cfg.ForgejoWebhookSecret,
 	})
 	if err != nil {
diff --git a/internal/config/config.go b/internal/config/config.go
index 743c130..a00ae19 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -17,6 +17,7 @@ type Config struct {
 	S3SecretKey string `envconfig:"CAIRN_S3_SECRET_KEY" default:"minioadmin"`
 	S3UseSSL    bool   `envconfig:"CAIRN_S3_USE_SSL" default:"false"`
 
+	ExternalURL          string `envconfig:"CAIRN_EXTERNAL_URL"`
 	ForgejoURL           string `envconfig:"CAIRN_FORGEJO_URL"`
 	ForgejoToken         string `envconfig:"CAIRN_FORGEJO_TOKEN"`
 	ForgejoWebhookSecret string `envconfig:"CAIRN_FORGEJO_WEBHOOK_SECRET"`
diff --git a/internal/forgejo/sync.go b/internal/forgejo/sync.go
index 892ebff..4986de1 100644
--- a/internal/forgejo/sync.go
+++ b/internal/forgejo/sync.go
@@ -14,8 +14,9 @@ import (
 
 // Sync handles bidirectional state synchronization between Cairn and Forgejo.
 type Sync struct {
-	Client *Client
-	DB     *gorm.DB
+	Client   *Client
+	DB       *gorm.DB
+	CairnURL string
 }
 
 // CreateIssueForCrashGroup creates a Forgejo issue for a new crash group.
@@ -29,8 +30,14 @@ func (s *Sync) CreateIssueForCrashGroup(ctx context.Context, group *cairnapi.Cra
 		return fmt.Errorf("getting repository: %w", err)
 	}
 
+	crashGroupLink := fmt.Sprintf("%d", group.ID)
+	if s.CairnURL != "" {
+		crashGroupLink = fmt.Sprintf("[%d](%s/crashgroups/%d)", group.ID, strings.TrimRight(s.CairnURL, "/"), group.ID)
+	}
+
 	body := fmt.Sprintf(`## Crash Group
 
+**Crash Group:** %s
 **Fingerprint:** `+"`%s`"+`
 **First seen:** %s
 **Type:** %s
@@ -43,7 +50,7 @@ func (s *Sync) CreateIssueForCrashGroup(ctx context.Context, group *cairnapi.Cra
 
 ---
 *Auto-created by [Cairn](/) — crash artifact aggregator*
-`, group.Fingerprint, group.FirstSeenAt.Format("2006-01-02 15:04:05"), group.Title, sampleTrace)
+`, crashGroupLink, group.Fingerprint, group.FirstSeenAt.Format("2006-01-02 15:04:05"), group.Title, sampleTrace)
 
 	issue, err := s.Client.CreateIssue(ctx, repo.Owner, repo.Name, CreateIssueRequest{
 		Title: "[Cairn] " + group.Title,
diff --git a/internal/web/routes.go b/internal/web/routes.go
index c76a0c4..9f1a57a 100644
--- a/internal/web/routes.go
+++ b/internal/web/routes.go
@@ -17,6 +17,7 @@ type RouterConfig struct {
 	Store         blob.Store
 	ForgejoClient *forgejo.Client
 	ForgejoURL    string
+	CairnURL      string
 	WebhookSecret string
 }
 
@@ -26,7 +27,7 @@ func NewRouter(cfg RouterConfig) (*gin.Engine, error) {
 		return nil, err
 	}
 
-	forgejoSync := &forgejo.Sync{Client: cfg.ForgejoClient, DB: cfg.DB}
+	forgejoSync := &forgejo.Sync{Client: cfg.ForgejoClient, DB: cfg.DB, CairnURL: cfg.CairnURL}
 
 	pages := &PageHandler{DB: cfg.DB, Templates: templates, ForgejoURL: cfg.ForgejoURL}
 	ingest := &handler.IngestHandler{DB: cfg.DB, Store: cfg.Store, ForgejoSync: forgejoSync}