Skip CI builds for existing packages

scripts/ci/bootstrap-apt.sh

@@ -8,12 +8,33 @@ export DEBIAN_FRONTEND=noninteractive
 
 distribution_id="$(detect_debian_distribution_id)"
 distribution_codename="$(detect_debian_distribution)"
+metadata_file="$(ci_metadata_file)"
 refresh_package_indexes=false
 
 log "Bootstrapping APT packages for $distribution_id:$distribution_codename"
 
 printf 'Acquire::http::Proxy "http://cbrapt01.lan.cyber.gent:3142";\n' >/etc/apt/apt.conf.d/80proxy
 apt-get update
+apt-get install -y --no-install-recommends \
+  ca-certificates \
+  curl \
+  git
+update-ca-certificates
+
+bash ./scripts/ci/preflight-package.sh
+
+if [[ -f "$metadata_file" ]]; then
+  set -a
+    # shellcheck disable=SC1090
+    . "$metadata_file"
+  set +a
+
+  if [[ "${SKIP_PACKAGE_BUILD:-false}" == "true" ]]; then
+    log "Skipping package bootstrap because the package already exists in Gitea"
+    exit 0
+  fi
+fi
+
 apt-get upgrade -y
 apt-get install -y --no-install-recommends build-essential
 
@@ -39,12 +60,9 @@ fi
 apt-get install -y --no-install-recommends \
   autoconf \
   automake \
-  ca-certificates \
   cmake \
-  curl \
   flex \
   gawk \
-  git \
   gnupg \
   libbz2-dev \
   libcap2-bin \