gha: move release commands into it's own script

.github/workflows/c-cpp.yml

@@ -120,28 +120,5 @@ jobs:
     - name: Remove old release, fetch artifacts, repackage binaries and upload new release
       env:
         GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        RELEASE_TAG: ${{ github.ref_name == 'master' && 'continuous' || format('continuous-{0}', github.ref_name) }}
-      run: |
-        gh release delete "$RELEASE_TAG" \
-          --yes \
-          --cleanup-tag \
-          --repo "$GITHUB_REPOSITORY" || true
-        gh run download "$GITHUB_RUN_ID" \
-          --dir artifacts/ \
-          --repo "$GITHUB_REPOSITORY"
-        pushd artifacts/
-        echo "Found artifacts:"
-        ls
-        for i in $(find -mindepth 1 -maxdepth 1 -type d); do
-          mv "$i"/* .
-          rm -rf "$i"
-        done
-        echo "Repackaged artifacts:"
-        ls -R
-        popd
-        sleep 20s
-        gh release create "$RELEASE_TAG" artifacts/* \
-          --title "Xash3D FWGS Continuous ${{ github.ref_name }} Build" \
-          --target $GITHUB_SHA \
-          --repo "$GITHUB_REPOSITORY" \
-          --prerelease
+        BASE_BUILDNUM_DATE: "2015-04-01"
+      run: bash scripts/gha/make_release.sh "Xash3D FWGS" "${{ github.ref_name }}"

scripts/gha/make_release.sh

@@ -0,0 +1,59 @@
+#!/bin/bash
+
+if ! command -v gh > /dev/null; then
+	echo "Install GitHub CLI tool"
+	exit 1
+fi
+
+RELEASE_NAME=$1
+BRANCH_NAME=$2
+DEFAULT_BRANCH_NAME=master
+
+if [ -z "$RELEASE_NAME" ] || [ -z "$BRANCH_NAME" ]; then
+	echo "Invalid arguments"
+	exit 1
+fi
+
+if [ "$BRANCH_NAME" == "$DEFAULT_BRANCH_NAME" ]; then
+	RELEASE_TAG="continuous"
+else
+	RELEASE_TAG="continuous-$BRANCH_NAME"
+fi
+
+gh release delete "$RELEASE_TAG" \
+	--yes \
+	--cleanup-tag \
+	--repo "$GITHUB_REPOSITORY" || true
+
+gh run download "$GITHUB_RUN_ID" \
+	--dir artifacts/ \
+	--repo "$GITHUB_REPOSITORY"
+
+pushd artifacts/ || exit 1
+echo "Found artifacts:"
+ls
+for i in $(find -mindepth 1 -maxdepth 1 -type d); do
+	mv "$i"/* .
+	rm -rf "$i"
+done
+echo "Repackaged artifacts:"
+ls -R
+popd || exit 1
+
+echo "Generated notes:"
+rm release-notes && touch release-notes
+if [ -n "$BASE_BUILDNUM_DATE" ]; then
+	LAST_COMMIT_DATE=$(git log -1 --format=%ci)
+	BUILDNUM=$(( ( $(date -d "$LAST_COMMIT_DATE" +%s ) - $(date -d "$BASE_BUILDNUM_DATE" +%s) ) / 86400 ))
+	echo "buildnum $BUILDNUM" | tee -a release-notes
+fi
+
+sleep 20s
+gh release create "$RELEASE_TAG" artifacts/* \
+	--title "$RELEASE_NAME Continuous $BRANCH_NAME Build" \
+	--notes-file release-notes \
+	--target "$GITHUB_SHA" \
+	--repo "$GITHUB_REPOSITORY" \
+	--prerelease
+
+rm release-notes