plugin-tests.sh handles being sourced

Author: rnro

.github/workflows/matrices/plugin-tests.json

@@ -1 +1 @@
-{"config":[{"name":"Plugin tests (6.0)","swift_version":"6.0","runner":"ubuntu-latest","image":"swift:6.0-jammy","platform":"Linux","setup_command":"apt-get update -y -q && apt-get install -y -q curl protobuf-compiler","command":"curl -s https://raw.githubusercontent.com/rnro/grpc-swift-protobuf/refs/heads/build_plugin_integration_tests/dev/plugin-tests.sh| bash","command_arguments":""},{"name":"Plugin tests (nightly-6.1)","swift_version":"nightly-6.1","runner":"ubuntu-latest","image":"swiftlang/swift:nightly-6.1-jammy","platform":"Linux","setup_command":"apt-get update -y -q && apt-get install -y -q curl protobuf-compiler","command":"curl -s https://raw.githubusercontent.com/rnro/grpc-swift-protobuf/refs/heads/build_plugin_integration_tests/dev/plugin-tests.sh| bash","command_arguments":""},{"name":"Plugin tests (nightly-main)","swift_version":"nightly-main","runner":"ubuntu-latest","image":"swiftlang/swift:nightly-main-jammy","platform":"Linux","setup_command":"apt-get update -y -q && apt-get install -y -q curl protobuf-compiler","command":"curl -s https://raw.githubusercontent.com/rnro/grpc-swift-protobuf/refs/heads/build_plugin_integration_tests/dev/plugin-tests.sh| bash","command_arguments":""}]}
+{"config":[{"name":"Plugin tests (6.0)","swift_version":"6.0","runner":"ubuntu-latest","image":"swift:6.0-jammy","platform":"Linux","setup_command":"apt-get update -y -q && apt-get install -y -q curl protobuf-compiler","command":"curl -s https://raw.githubusercontent.com/rnro/grpc-swift-protobuf/refs/heads/build_plugin_integration_tests/dev/plugin-tests.sh| GITHUB_ACTIONS=true bash","command_arguments":""},{"name":"Plugin tests (nightly-6.1)","swift_version":"nightly-6.1","runner":"ubuntu-latest","image":"swiftlang/swift:nightly-6.1-jammy","platform":"Linux","setup_command":"apt-get update -y -q && apt-get install -y -q curl protobuf-compiler","command":"curl -s https://raw.githubusercontent.com/rnro/grpc-swift-protobuf/refs/heads/build_plugin_integration_tests/dev/plugin-tests.sh| GITHUB_ACTIONS=true bash","command_arguments":""},{"name":"Plugin tests (nightly-main)","swift_version":"nightly-main","runner":"ubuntu-latest","image":"swiftlang/swift:nightly-main-jammy","platform":"Linux","setup_command":"apt-get update -y -q && apt-get install -y -q curl protobuf-compiler","command":"curl -s https://raw.githubusercontent.com/rnro/grpc-swift-protobuf/refs/heads/build_plugin_integration_tests/dev/plugin-tests.sh| GITHUB_ACTIONS=true bash","command_arguments":""}]}

dev/plugin-tests.sh

@@ -19,8 +19,15 @@ log() { printf -- "** %s\n" "$*" >&2; }
 error() { printf -- "** ERROR: %s\n" "$*" >&2; }
 fatal() { error "$@"; exit 1; }
 
-here="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+if [[ -n ${GITHUB_ACTIONS:=""} ]]; then
+    # we will have been piped to bash and won't know the location of the script
+    echo "Running in GitHub Actions"
+    source_directory="$(pwd)"
+else
+    here="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+    source_directory="$(readlink -f "${here}/..")"
+fi
 tests_directory="${PLUGIN_TESTS_OUTPUT_DIRECTORY:=$(mktemp -d)}"
 
-PLUGIN_TESTS_OUTPUT_DIRECTORY="$tests_directory" "$here/setup-plugin-tests.sh"
-PLUGIN_TESTS_DIRECTORY="$tests_directory" "$here/execute-plugin-tests.sh"
+PLUGIN_TESTS_OUTPUT_DIRECTORY="$tests_directory" "${source_directory}/dev/setup-plugin-tests.sh"
+PLUGIN_TESTS_DIRECTORY="$tests_directory" "${source_directory}/dev/execute-plugin-tests.sh"