From b6f31bfba7898778b71df3b1ac14a3cd51a2500e Mon Sep 17 00:00:00 2001
From: Cary Phillips <cary@ilm.com>
Date: Wed, 14 Feb 2024 10:37:21 -0800
Subject: [PATCH] Add workflow to sign release artifacts with Sigstore

Replicates the openexr workflow:
https://github.com/AcademySoftwareFoundation/openexr/pull/1637

Signed-off-by: Cary Phillips <cary@ilm.com>
---
 .github/workflows/release-sign.yml | 57 ++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 .github/workflows/release-sign.yml

diff --git a/.github/workflows/release-sign.yml b/.github/workflows/release-sign.yml
new file mode 100644
index 00000000..3133be78
--- /dev/null
+++ b/.github/workflows/release-sign.yml
@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) Contributors to the OpenEXR Project.
+
+name: Sign Release
+
+on:
+  release:
+    types: [created]
+
+permissions:
+  contents: write
+  id-token: write
+  repository-projects: write
+  
+jobs:
+  release:
+    name: Sign & upload release artifacts
+    runs-on: ubuntu-latest
+
+    steps:
+
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Create archive
+        run: git archive --format=tar.gz -o Imath-${{ github.ref_name }}.tar.gz ${{ github.ref_name }}
+
+      - name: Sign archive with Sigstore
+        uses: sigstore/gh-action-sigstore-python@v2.1.0
+        with:
+          inputs: Imath-${{ github.ref_name }}.tar.gz
+
+      - name: Get release tag
+        id: get_release
+        uses: bruceadams/get-release@v1.3.2
+        env:
+          GITHUB_TOKEN: ${{ github.token }}
+
+      - name: Upload release archive
+        uses: actions/upload-release-asset@v1.0.2
+        env:
+          GITHUB_TOKEN: ${{ github.token }}
+        with:
+          upload_url: ${{ steps.get_release.outputs.upload_url }}
+          asset_path: Imath-${{ github.ref_name }}.tar.gz
+          asset_name: Imath-${{ github.ref_name }}.tar.gz
+          asset_content_type: application/zip
+
+      - name: Upload release sigstore
+        uses: actions/upload-release-asset@v1.0.2
+        env:
+          GITHUB_TOKEN: ${{ github.token }}
+        with:
+          upload_url: ${{ steps.get_release.outputs.upload_url }}
+          asset_path: Imath-${{ github.ref_name }}.tar.gz.sigstore
+          asset_name: Imath-${{ github.ref_name }}.tar.gz.sigstore
+          asset_content_type: application/zip
\ No newline at end of file