I am trying to execute some line using node js child process and getting error. Following is my code:
let cmd : string = "code " + PROJECTS[value];
exec(cmd, function callback(error, stdout, stderr) {
console.log("started console app");
});
ERROR :
cmd:"C:\WINDOWS\system32\cmd.exe /s /c "code c:\Users\shana\Dropbox\code-settings-syn... (length: 82)"
code:1
killed:false
message:"Command failed: C:\WINDOWS\system32\cmd.exe /s /c "code c:\Users\shana\Dropbox\c... (length: 99)"
signal:null
stack:undefined
Detail of error JSON.
Full CMD : "C:\WINDOWS\system32\cmd.exe /s /c "code c:\Users\shana\Dropbox\code-settings-sync""
Full message : "Command failed: C:\WINDOWS\system32\cmd.exe /s /c "code c:\Users\shana\Dropbox\code-settings-sync"\n"
The exec() function in Node. js creates a new shell process and executes a command in that shell. The output of the command is kept in a buffer in memory, which you can accept via a callback function passed into exec() .
child_process. exec() : spawns a shell and runs a command within that shell, passing the stdout and stderr to a callback function when complete. child_process. execFile() : similar to child_process. exec() except that it spawns the command directly without first spawning a shell by default.
To execute an external program from within Node. js, we can use the child_process module's exec method. const { exec } = require('child_process'); exec(command, (error, stdout, stderr) => { console. log(error, stdout, stderr) });
try a simpler example ..
var exec = require('child_process').exec;
var cmd = 'code C:\Program Files';
exec(cmd, function(err, stdout, stderr) {
if (err) {
console.error(err);
return;
}
console.log(stdout);
});
does this work??
I didn't want to see the whole error (too verbose) so I did something like this:
try {
const { stdout, stderr } = await exec('echo TEST');
console.log('stdout:', stdout);
console.log('stderr:', stderr);
} catch (e) {
// If exec fails and you want to see the whole ugly error:
// console.error(e);
console.log('How about a nice human readable message instead?');
}
Because of the "await" this goes inside an "async" function. More information: https://stackoverflow.com/a/56095793/722796
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