init

echomessage.sh

@@ -0,0 +1,124 @@
+#!/bin/bash
+
+# Copyright (C) Microsoft Corporation.
+
+# This Symphony Script Provider's script is used to echo a message to the terminal.
+# Exit immediately if a command fails
+set -e
+
+# Fail if an unset variable is used
+set -u
+
+SYMPHONY_STATUS_FIELD="__status"
+SYMPHONY_ERROR_FIELD="__error"
+SUCCESS_SYMPHONY_CODE=200
+ERROR_SYMPHONY_CODE=400
+
+# Executes a command and echoes command's output. Exits on failure.
+# Arguments:
+#   command: The command to execute.
+#   command_output: A reference to a variable that will hold the command output.
+#   command_status: A reference to a variable that will hold the command status code.
+function execute_command_exit_on_failure() {
+    local command=$1
+    local -n command_output=$2
+    local -n command_status=$3
+
+    execute_command_with_status_code "$command" command_output command_status
+
+    if [ $command_status -ne 0 ] ; then
+      echo_output_dictionary_to_output_file
+      exit $command_status
+    fi
+}
+
+# Executes a command and echoes command's output.
+# Arguments:
+#   command: The command to execute.
+#   base_command_output: A reference to a variable that will hold the command output.
+#   base_command_status: A reference to a variable that will hold the command status code.
+function execute_command_with_status_code() {
+    local command=$1
+    local -n base_command_output=$2
+    local -n base_command_status=$3
+
+    # Execute the command and capture output
+    base_command_output=$(eval "$command" 2>&1) || base_command_status=$?
+    if [ $base_command_status -ne 0 ]; then
+        echo_error_to_output_dictionary "$base_command_output"
+    else
+        echo_success_to_output_dictionary
+    fi
+}
+
+# Inserts a success status to the output dictionary
+function echo_success_to_output_dictionary() {
+    echo_key_value_to_output_dictionary $SYMPHONY_STATUS_FIELD $SUCCESS_SYMPHONY_CODE
+}
+
+# Inserts an error status and message to the output dictionary
+# Arguments:
+#   error: The error message.
+function echo_error_to_output_dictionary() {
+    local error="$1"
+    echo_key_value_to_output_dictionary $SYMPHONY_STATUS_FIELD $ERROR_SYMPHONY_CODE
+    echo_key_value_to_output_dictionary $SYMPHONY_ERROR_FIELD "$error"
+}
+
+# Outputs our dictionary to a file.
+function echo_output_dictionary_to_output_file() {
+    echo "$outputs" | tee "$output_file"
+}
+
+# Inserts a key-value pair to the output dictionary
+# Arguments:
+#   key: The key
+#   value: The value
+function echo_key_value_to_output_dictionary() {
+    local key=$1
+    local value=$2
+    outputs=$(echo "$outputs" | jq --arg key "$key" --arg value "$value" '.[$key] = $value')
+}
+
+# Gets a value from the output dictionary by passing a key
+# Arguments:
+#   key: The key
+function get_value_from_output_dictionary() {
+    local key=$1
+    echo "$outputs" | jq -r --arg key "$key" '.[$key]'
+}
+
+# Script Provider Setup
+# Reference: https://github.com/eclipse-symphony/symphony/blob/main/api/pkg/apis/v1alpha1/providers/stage/script/staging/test.sh
+# The inputs supplied to a Symphony stage may look like the following JSON:
+# {
+#     "__activation": "azure_deploy_yocto_vm_activation",
+#     "__activationGeneration": "1",
+#     "__campaign": "azure_deploy_yocto_vm",
+#     "__previousStage": "service_principal_auth",
+#     "__status": 400
+#     "__error": "Error: Some Error"
+#     "__site": "laptop",
+#     "__stage": "deploy_yocto_vm",
+#     ... Additional inputs supplied to the stage.
+# }
+inputs_file=$1
+
+# Store the inputs into the outputs. This allows the inputs of a stage to be used as inputs in a subsequent stage.
+outputs=$(jq -c 'with_entries(.value |= "\(.)")' "$inputs_file")
+
+# Generate the output file name
+output_file="${inputs_file%.*}-output.${inputs_file##*.}"
+
+### Start of the script
+
+echoCommand="echo Hello world to Alice | tee /config/echo_message.txt"
+echoCommand_output=""
+echoCommand_status=0
+execute_command_with_status_code "$echoCommand" echoCommand_output echoCommand_status
+
+# Add '*****' around the message to see it clearly in the Symphony logs
+echo "***** Hello world to Alice *****"
+
+# Write the updated key-value pairs to the output file
+echo_output_dictionary_to_output_file