ci: compatible with macos base64 version

.gitlab/ci/common.yml

@@ -258,7 +258,6 @@ variables:
   tags:
     - macos-tart
   image: macos-sequoia-idf-v6.1
-  cache: []  # cache are built for amd64 linux runners, useless here
   after_script: []  # ccache now is disabled for macos brew runners
   timeout: 30m
 

tools/ci/dynamic_pipelines/templates/test_child_pipeline.yml

@@ -12,6 +12,7 @@ all_build_finished:
     expire_in: 1 week
     when: always
   before_script: []
+  dependencies: []
   script:
     - echo "all test jobs finished"
 

tools/ci/utils.sh

@@ -5,7 +5,14 @@ function add_ssh_keys() {
   mkdir -p ~/.ssh
   chmod 700 ~/.ssh
   echo -n "${key_string}" >~/.ssh/id_rsa_base64
-  base64 --decode --ignore-garbage ~/.ssh/id_rsa_base64 >~/.ssh/id_rsa
+  # Detect base64 implementation via --help output
+  if base64 --help 2>&1 | grep -q -- '--ignore-garbage'; then
+    # GNU coreutils base64
+    base64 --decode --ignore-garbage ~/.ssh/id_rsa_base64 >~/.ssh/id_rsa
+  else
+    # macOS/BSD base64 - requires stdin or -i flag
+    base64 --decode -i ~/.ssh/id_rsa_base64 -o ~/.ssh/id_rsa
+  fi
   chmod 600 ~/.ssh/id_rsa
 }