Shelljs执行Shell脚本报“not found”错误求助排查

Hey, let's break down why your ping.sh runs perfectly in the terminal but throws a "not found" error when called through ShellJS. Here are the top culprits and how to fix them:

1. Missing curl Due to PATH Differences #

When you run the script directly in your terminal, your user's full PATH environment variable includes the directory where curl lives. But when ShellJS executes the script, it runs in a non-interactive subshell with a stripped-down PATH—so it might not be able to locate curl.

How to Verify #

Add this line at the very top of ping.sh to print the current PATH:

echo "Current PATH: $PATH"

Compare the output when running ./ping.sh 8080 directly vs. via ShellJS. If the ShellJS version is missing paths like /usr/bin or /usr/local/bin (where curl is usually located), that's the issue.

Fixes #

• Use the absolute path to curl in your script. First find its path with which curl in your terminal (e.g., /usr/bin/curl), then update line 7:

  api_response=$(/usr/bin/curl --write-out %{http_code} --silent --output /dev/null "http://localhost:$port/ping")
  

• Or set the full PATH explicitly in your ping.js before executing the script:

  const shell = require('shelljs');
  // Add common bin directories to PATH
  shell.env.PATH = '/usr/bin:/usr/local/bin:' + shell.env.PATH;
  shell.exec('./ping.sh 8080');
  

2. Working Directory Mismatch #

If your ping.js isn't in the same folder as ping.sh, using ./ping.sh in ShellJS will look for the script in the current working directory of Node.js (not where ping.js is stored), leading to a "script not found" error.

How to Verify #

Add this line to ping.js to check the working directory:

const shell = require('shelljs');
console.log('Current working directory:', shell.pwd().stdout);

If this isn't the folder where ping.sh lives, that's the problem.

Fixes #

• Use the absolute path to ping.sh in your ping.js:

  shell.exec('/full/path/to/your/ping.sh 8080');
  

• Or switch to the script's directory first:

  const shell = require('shelljs');
  // Replace with the actual directory containing ping.sh
  shell.cd('/path/to/ping-sh-directory');
  shell.exec('./ping.sh 8080');
  

3. Bash Syntax vs. POSIX Shell Compatibility #

Your script uses (( ... ))—a Bash-specific syntax for arithmetic operations. By default, ShellJS might use sh (the POSIX-compliant shell) instead of Bash, and sh doesn't support (( ... )). This can throw an error that might look like "not found" (the shell misinterprets the syntax as a command).

How to Verify #

Try running the script with sh directly:

sh ping.sh 8080

If it throws an error, this is the issue.

Fixes #

• Add a shebang at the top of ping.sh to specify it should run with Bash:

  #!/bin/bash
  

• Then explicitly call Bash in your ping.js:

  shell.exec('bash ./ping.sh 8080');
  

4. Permissions (Less Likely, but Worth Checking) #

While you can run the script directly, double-check that the execution permissions are set correctly (in case ShellJS runs under a different user context):

ls -l ping.sh

You should see x in the permissions (e.g., -rwxr-xr-x). If not, add execute permissions:

chmod +x ping.sh

内容的提问来源于stack exchange，提问作者Mehmet Ataş