From 41b21d8450dd3e3cbd735fdfb0a0dfdb9608c78e Mon Sep 17 00:00:00 2001
From: Eric Norris <enorris@etsy.com>
Date: Wed, 19 May 2021 12:40:22 -0400
Subject: [PATCH] fix: specify origin when determining previous SHA
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Since the workflow is triggered on a git tag, git rev-parse will say
"fatal: Needed a single revision” if you don't specify origin/main.
---
 .github/workflows/release.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 51f1fb8..80b67e1 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -35,7 +35,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           export MESSAGE="chore: regenerate homebrew formula"
-          export SHA=$(git rev-parse --verify main:Formula/terraform-demux.rb)
+          export SHA=$(git rev-parse --verify origin/main:Formula/terraform-demux.rb)
           export CONTENT=$(base64 -i dist/terraform-demux.rb)
           gh api --method PUT /repos/:owner/:repo/contents/Formula/terraform-demux.rb \
             --field message="$MESSAGE" \