I have an editor in my program and dynamically write commands and execute them. I want to move all files and folders inside myPublish directory to current directory by child_process exec. I use robocopy command in windows. when I test robocopy in cmd, it works correctly:
robocopy /s .\myPublish .\ /move
but in program, nodejs gives an unclear error message that just says: "Command failed: robocopy /s .\myPublish .\ /move\n"
I've just hit this issue also. While most console applications should return an exit code of zero when there's no errors, robocopy has a series of custom exit codes. This makes Node think that there's been an error during execution, when there may not have been.
As per here, Robocopy has the following exit code bits that make up the exit code:
0×10 Serious error. Robocopy did not copy any files. This is either a usage error or an error due to insufficient access privileges on the source or destination directories.
0×08 Some files or directories could not be copied (copy errors occurred and the retry limit was exceeded). Check these errors further.
0×04 Some Mismatched files or directories were detected. Examine the output log. Housekeeping is probably necessary.
0×02 Some Extra files or directories were detected. Examine the output log. Some housekeeping may be needed.
0×01 One or more files were copied successfully (that is, new files have arrived).
0×00 No errors occurred, and no copying was done. The source and destination directory trees are completely synchronized.
To fix this, you need to catch the error and inspect the error code:
const cp = require('child_process');
try {
cp.execSync('robocopy ...');
} catch (err) {
console.log(err.status); // get the return code
console.log(err.output.toString()); // get robocopy's full output
}
I think you would generally consider a code greater than 8 to be a more serious error.
