From c1bba52d77fd4b35d15b07a6bea62c0d471be128 Mon Sep 17 00:00:00 2001
From: Wagner Santos <wagnermecsantos@gmail.com>
Date: Sat, 30 Nov 2019 11:14:04 -0300
Subject: [PATCH] fix: do not try to get parent of push event's "before" field

"before" field of a push event's payload already shows the commit before the push event was sent, so we can use it as "from" field of the revision.

Fixes #18
---
 run.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/run.js b/run.js
index ead6296..2a630eb 100644
--- a/run.js
+++ b/run.js
@@ -56,13 +56,15 @@ const getRangeForEvent = async () => {
   const commitShas = commits.map(commit => commit.sha)
   const [from] = commitShas
   const to = commitShas[commitShas.length - 1]
+  // Git revision range doesn't include the "from" field in "git log", so for "from" we use the parent commit of PR's first commit
+  const fromParent = `${from}^1`
 
-  return [from, to]
+  return [fromParent, to]
 }
 
 function getHistoryCommits(from, to) {
   const options = {
-    from: from && `${from}^1`,
+    from,
     to,
   }