How to Pass Variables from Node.js to Bash Script

---

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: pass variable from node to bash exec

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---

The Problem

[[See Video to Reveal this Text or Code Snippet]]

This code, as it stands, won't work as intended because the exec function cannot accept multiple arguments in that way.

The Solution

Understanding the Exec Function

To correct this, we need to make sure that we pass the variable properly into the command string that exec will run. This means constructing the command string to include the desired variable.

Step-by-Step Implementation

Here's how you can effectively pass the variable greeting into your Bash command:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of the Code:

Import the exec function: We begin by importing the exec method from the child_process module.

Define the variable: We define a greeting variable we want to pass.

Construct the Bash command:

Executing the command:

Within the try block, we call exec with the constructed command. The output (stdout) will then log "hello" to the console.

Error Handling: If any error occurs during the execution of the command, it will be caught, and an error message will be logged to the console.

Final Thoughts