From a5949d861d3b2d83c0ac8a3fbcb946c152a71215 Mon Sep 17 00:00:00 2001
From: Roman Kishchenko <rkishchenko@gmail.com>
Date: Wed, 9 Sep 2020 11:17:28 +0300
Subject: [PATCH] fix: the query is incorrect if either 'branch' or 'base' is
 not specified (#10)

---
 action.yml |  2 +-
 index.js   | 21 +++++++++++++--------
 2 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/action.yml b/action.yml
index 42495f72..b6e6a748 100644
--- a/action.yml
+++ b/action.yml
@@ -10,7 +10,7 @@ inputs:
     required: true
   branch:
     description: 'Branch name'
-    required: true
+    required: false
   base:
     description: 'The base branch name of the Pull Request'
     required: false
diff --git a/index.js b/index.js
index c08c7b1d..980cd6e2 100644
--- a/index.js
+++ b/index.js
@@ -6,17 +6,22 @@ const { GitHub, context } = require('@actions/github')
 const main = async () => {
   const token = core.getInput('github-token')
   const branch = core.getInput('branch')
-  const base = core.getInput('base', { required: false })
+  const base = core.getInput('base')
+  
+  const query = {
+    ...context.repo,
+    state: 'open'
+  }
+  if (branch) {
+    query.head = `${context.repo.owner}:${branch}`
+  }
+  if (base) {
+    query.base = base
+  }
 
   const octokit = new GitHub(token)
 
-  const res = await octokit.pulls.list({
-    ...context.repo,
-    state: 'open',
-    head: `${context.repo.owner}:${branch}`,
-    base
-  })
-
+  const res = await octokit.pulls.list(query)
   const pr = res.data.length && res.data[0]
 
   core.debug(`pr: ${JSON.stringify(pr, null, 2)}`)