From 6a19310bda56e6003dadffeb77042e2a662193f2 Mon Sep 17 00:00:00 2001
From: James Forbes <james.a.forbes@gmail.com>
Date: Sun, 9 Jan 2022 14:02:06 +1100
Subject: [PATCH] Fix crash when there is only one release (#241)

---
 .vscode/launch.json | 30 ++++++++++++++++++++++++++++++
 lib/index.js        |  3 ++-
 2 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/.vscode/launch.json b/.vscode/launch.json
index 4f3afe0..c03c46f 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -21,6 +21,22 @@
             "skipFiles": [
                 "<node_internals>/**"
             ],
+            "cwd": "/home/james/src/harth/sum-type",
+            "args": ["pr"],
+            "program": "${workspaceFolder}/bin.js"
+        },
+        {
+            "type": "pwa-node",
+            "request": "launch",
+            "name": "sum-type:pr",
+            "skipFiles": [
+                "<node_internals>/**"
+            ],
+            "cwd": "/home/james/src/harth/sum-type",
+            "env": {
+                "GITHUB_REPOSITORY":"JAForbes/sum-type"
+            },
+            "envFile": "${workspaceFolder}/.env",
             "args": ["pr"],
             "program": "${workspaceFolder}/bin.js"
         },
@@ -74,6 +90,20 @@
             "args": ["merge", "--commit", "--target", "main", "--source", "next", "--verbose", "--force", "--clean", "--changelog", "--compact"],
             "program": "${workspaceFolder}/bin.js"
         },
+        {
+            "type": "pwa-node",
+            "request": "launch",
+            "name": "sum-type:merge --commit",
+            "skipFiles": [
+                "<node_internals>/**"
+            ],
+            "env": {
+                "GITHUB_REPOSITORY":"JAForbes/sum-type"
+            },
+            "envFile": "${workspaceFolder}/.env",
+            "args": ["merge", "--commit", "--target", "main", "--source", "next", "--verbose", "--force", "--clean", "--changelog", "--compact"],
+            "program": "${workspaceFolder}/bin.js"
+        },
         {
             "type": "pwa-node",
             "request": "launch",
diff --git a/lib/index.js b/lib/index.js
index 43cc1cb..4c779ad 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -309,8 +309,9 @@ async function extractChangelog(options){
     let recentBranches; {
 
         let firstEverRelease = a == null;
+        let onlyOneRelease = b == null
 
-        let q = firstEverRelease
+        let q = firstEverRelease || onlyOneRelease
             ? `base:${source} is:pr is:merged repo:${owner}/${repo}`
             : `merged:${a.closed_at}..${b.closed_at} base:${source} is:pr is:merged repo:${owner}/${repo}`