tools/docker: use correct branch and commit of IDF when building

tools/ci/executable-list.txt

@@ -34,6 +34,7 @@ tools/ci/test_configure_ci_environment.sh
 tools/cmake/convert_to_cmake.py
 tools/cmake/run_cmake_lint.sh
 tools/esp_app_trace/apptrace_proc.py
+tools/elf_to_ld.sh
 tools/esp_app_trace/logtrace_proc.py
 tools/format.sh
 tools/gen_esp_err_to_name.py
@@ -77,4 +78,5 @@ tools/check_kconfigs.py
 tools/test_check_kconfigs.py
 install.sh
 tools/docker/entrypoint.sh
+tools/docker/hooks/build
 tools/idf_tools.py

tools/docker/hooks/build

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+# This file gets executed to build the image on the Docker Hub.
+# See https://docs.docker.com/docker-hub/builds/advanced/#build-hook-examples for details.
+
+set -euo pipefail
+
+echo "Building for branch ${SOURCE_BRANCH}, commit ${SOURCE_COMMIT}"
+
+docker build \
+    --build-arg IDF_CLONE_BRANCH_OR_TAG=${SOURCE_BRANCH} \
+    --build-arg IDF_CHECKOUT_REF=${SOURCE_COMMIT} \
+    -f $DOCKERFILE_PATH \
+    -t $IMAGE_NAME .