Automate draft release

ci/lib.sh

@@ -12,6 +12,10 @@ pkg_json_version() {
   jq -r .version package.json
 }
 
+vscode_version() {
+  jq -r .version lib/vscode/package.json
+}
+
 os() {
   local os
   os=$(uname | tr '[:upper:]' '[:lower:]')
@@ -41,3 +45,34 @@ arch() {
     ;;
   esac
 }
+
+curl() {
+  command curl -H "Authorization: token $GITHUB_TOKEN" "$@"
+}
+
+# Grabs the most recent ci.yaml github workflow run that was successful and triggered from the same commit being pushd.
+# This will contain the artifacts we want.
+# https://developer.github.com/v3/actions/workflow-runs/#list-workflow-runs
+get_artifacts_url() {
+  curl -sSL 'https://api.github.com/repos/cdr/code-server/actions/workflows/ci.yaml/runs?status=success&event=push' | jq -r ".workflow_runs[] | select(.head_sha == \"$(git rev-parse HEAD)\") | .artifacts_url" | head -n 1
+}
+
+# Grabs the artifact's download url.
+# https://developer.github.com/v3/actions/artifacts/#list-workflow-run-artifacts
+get_artifact_url() {
+  local artifact_name="$1"
+  curl -sSL "$(get_artifacts_url)" | jq -r ".artifacts[] | select(.name == \"$artifact_name\") | .archive_download_url" | head -n 1
+}
+
+# Uses the above two functions to download a artifact into a directory.
+download_artifact() {
+  local artifact_name="$1"
+  local dst="$2"
+
+  local tmp_file
+  tmp_file="$(mktemp)"
+
+  curl -sSL "$(get_artifact_url "$artifact_name")" > "$tmp_file"
+  unzip -o "$tmp_file" -d "$dst"
+  rm "$tmp_file"
+}