From 4ff2b2ad8cff6253b40cb634c9f0df185ac2c53e Mon Sep 17 00:00:00 2001
From: Anton Dukhovnikov <antond@wetafx.co.nz>
Date: Mon, 20 Jul 2026 15:59:36 +1200
Subject: [PATCH] add signed release action

Signed-off-by: Anton Dukhovnikov <antond@wetafx.co.nz>
---
 .github/workflows/release-sign.yml | 76 ++++++++++++++++++++++++++++++
 1 file changed, 76 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 0000000..fd7e4b6
--- /dev/null
+++ b/.github/workflows/release-sign.yml
@@ -0,0 +1,76 @@
+# SPDX-License-Identifier: Apache-2.0
+# Copyright Contributors to the rawtoaces project.
+
+#
+# Releases are signed via https://github.com/sigstore/sigstore-python.
+# See https://docs.sigstore.dev for information about sigstore.
+#
+# This action creates a .tar.gz of the complete rawtoaces-data source tree at
+# the given release tag, signs it via sigstore, and uploads the
+# .tar.gz and the associated .tar.gz.sigstore credential bundle.
+#
+# To verify a downloaded release at a given tag:
+# 
+#   % pip install sigstore
+#   % sigstore verify github --cert-identity https://github.com/AcademySoftwareFoundation/rawtoaces-data/.github/workflows/release-sign.yml@refs/tags/<tag> rawtoaces-data-<tag>.tar.gz
+#
+# To sign an existing release after publish (e.g. workflow fix): Actions →
+# Sign Release → Run workflow → enter the release tag (e.g. v3.2.8).
+
+name: Sign Release
+
+on:
+  release:
+    types: [published]
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: "Release tag to sign (e.g. v3.2.8)"
+        required: true
+        type: string
+
+permissions:
+  contents: read
+  
+jobs:
+  release:
+    name: Sign & upload release artifacts
+    runs-on: ubuntu-latest
+
+    env:
+      TAG: ${{ github.event_name == 'workflow_dispatch' && github.event.inputs.tag || github.ref_name }}
+    permissions:
+      contents: write   # required for gh release upload (attach assets)
+      id-token: write   # required for sigstore OIDC signing
+    steps:
+
+      - name: Set Prefix
+        # The tag name begins with a 'v', e.g. "v3.2.4", but the prefix
+        # should omit the 'v', so the tarball "rawtoaces-data-3.2.4.tar.gz"
+        # extracts files into "rawtoaces-data-v3.2.4/...".  This matches
+        # the GitHub release page autogenerated artifact conventions.
+        run: |
+          echo RAWTOACES_DATA_PREFIX=rawtoaces-data-${TAG//v}/ >> $GITHUB_ENV
+          echo RAWTOACES_DATA_TARBALL=rawtoaces-data-${TAG//v}.tar.gz >> $GITHUB_ENV
+        shell: bash
+
+      - name: Checkout
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+        with:
+          ref: ${{ github.event_name == 'workflow_dispatch' && github.event.inputs.tag || github.ref }}
+
+      - name: Create archive
+        run: git archive --format=tar.gz -o ${RAWTOACES_DATA_TARBALL} --prefix ${RAWTOACES_DATA_PREFIX} ${TAG}
+
+      - name: Sign archive with Sigstore
+        uses: sigstore/gh-action-sigstore-python@5b79a39c381910c090341a2c9b0bf022c8b387e1 # v3.4.0
+        with:
+          inputs: ${{ env.RAWTOACES_DATA_TARBALL }}
+          upload-signing-artifacts: false
+          release-signing-artifacts: false
+
+      - name: Upload release archive
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: gh release upload ${TAG} ${RAWTOACES_DATA_TARBALL} ${RAWTOACES_DATA_TARBALL}.sigstore.json
+