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Handle Node.js spawnSync errors
The 2019 Stack Overflow Developer Survey Results Are InHow do I debug Node.js applications?How do I get started with Node.jsWriting files in Node.jsHow do I pass command line arguments to a Node.js program?Read environment variables in Node.jsHow to decide when to use Node.js?How to exit in Node.jsWhat is the purpose of Node.js module.exports and how do you use it?How do I completely uninstall Node.js, and reinstall from beginning (Mac OS X)npm throws error without sudo
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I'm trying to run "npm publish" from a gulp task. It works, but I want to handle any error that npm command itself throws.
If I execute this code:
var cmd = spawnSync('npm.cmd', ['publish', packageDir], stdio: 'inherit' )
cmd.stdout and cmd.stderr are null. If I execute
var cmd = spawnSync('npm.cmd', ['publish', packageDir], stdio: 'pipe' )
cmd.stdout and cmd.stderr are buffers, like <Buffer 6e 70 6d 20 45 52...
What am I missing here?
node.js npm gulp spawn
asked Oct 20 '16 at 8:35
DukeDuke
659
add a comment |
I'm trying to run "npm publish" from a gulp task. It works, but I want to handle any error that npm command itself throws.
If I execute this code:
var cmd = spawnSync('npm.cmd', ['publish', packageDir], stdio: 'inherit' )
cmd.stdout and cmd.stderr are null. If I execute
var cmd = spawnSync('npm.cmd', ['publish', packageDir], stdio: 'pipe' )
cmd.stdout and cmd.stderr are buffers, like <Buffer 6e 70 6d 20 45 52...
What am I missing here?
node.js npm gulp spawn
asked Oct 20 '16 at 8:35
DukeDuke
659
If I do thiscmd.stderr.toString(), I can see the error, but cmd,error is still undefined...
– Duke
Oct 20 '16 at 8:56
add a comment |
I'm trying to run "npm publish" from a gulp task. It works, but I want to handle any error that npm command itself throws.
If I execute this code:
var cmd = spawnSync('npm.cmd', ['publish', packageDir], stdio: 'inherit' )
cmd.stdout and cmd.stderr are null. If I execute
var cmd = spawnSync('npm.cmd', ['publish', packageDir], stdio: 'pipe' )
cmd.stdout and cmd.stderr are buffers, like <Buffer 6e 70 6d 20 45 52...
What am I missing here?
node.js npm gulp spawn
asked Oct 20 '16 at 8:35
DukeDuke
659
I'm trying to run "npm publish" from a gulp task. It works, but I want to handle any error that npm command itself throws.
If I execute this code:
var cmd = spawnSync('npm.cmd', ['publish', packageDir], stdio: 'inherit' )
cmd.stdout and cmd.stderr are null. If I execute
var cmd = spawnSync('npm.cmd', ['publish', packageDir], stdio: 'pipe' )
cmd.stdout and cmd.stderr are buffers, like <Buffer 6e 70 6d 20 45 52...
What am I missing here?
node.js npm gulp spawn
node.js npm gulp spawn
asked Oct 20 '16 at 8:35
DukeDuke
659
asked Oct 20 '16 at 8:35
DukeDuke
659
asked Oct 20 '16 at 8:35
DukeDuke
659
asked Oct 20 '16 at 8:35
DukeDuke
659
asked Oct 20 '16 at 8:35
DukeDuke
659
659
If I do thiscmd.stderr.toString(), I can see the error, but cmd,error is still undefined...
– Duke
Oct 20 '16 at 8:56
add a comment |
If I do thiscmd.stderr.toString(), I can see the error, but cmd,error is still undefined...
– Duke
Oct 20 '16 at 8:56
If I do this
cmd.stderr.toString(), I can see the error, but cmd,error is still undefined...– Duke
Oct 20 '16 at 8:56
If I do this
cmd.stderr.toString(), I can see the error, but cmd,error is still undefined...– Duke
Oct 20 '16 at 8:56
add a comment |
1 Answer
1
active
oldest
votes
In Node documentation regarding options.stdio it says
By default, the child's stdin, stdout, and stderr are redirected to
corresponding subprocess.stdin, subprocess.stdout, and
subprocess.stderr.
In your options use
stdio: ['inherit', 'inherit', 'pipe']
And then check for stderr. An example:
var spawn = childProcess.spawnSync('node script.js', stdio: ['inherit', 'inherit', 'pipe'] )
if (spawn.stderr)
console.log(Error(spawn.stderr))
process.exit(1)
answered Mar 8 at 8:39
João Pimentel FerreiraJoão Pimentel Ferreira
4,17622331
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
In Node documentation regarding options.stdio it says
By default, the child's stdin, stdout, and stderr are redirected to
corresponding subprocess.stdin, subprocess.stdout, and
subprocess.stderr.
In your options use
stdio: ['inherit', 'inherit', 'pipe']
And then check for stderr. An example:
var spawn = childProcess.spawnSync('node script.js', stdio: ['inherit', 'inherit', 'pipe'] )
if (spawn.stderr)
console.log(Error(spawn.stderr))
process.exit(1)
answered Mar 8 at 8:39
João Pimentel FerreiraJoão Pimentel Ferreira
4,17622331
add a comment |
In Node documentation regarding options.stdio it says
By default, the child's stdin, stdout, and stderr are redirected to
corresponding subprocess.stdin, subprocess.stdout, and
subprocess.stderr.
In your options use
stdio: ['inherit', 'inherit', 'pipe']
And then check for stderr. An example:
var spawn = childProcess.spawnSync('node script.js', stdio: ['inherit', 'inherit', 'pipe'] )
if (spawn.stderr)
console.log(Error(spawn.stderr))
process.exit(1)
answered Mar 8 at 8:39
João Pimentel FerreiraJoão Pimentel Ferreira
4,17622331
add a comment |
In Node documentation regarding options.stdio it says
By default, the child's stdin, stdout, and stderr are redirected to
corresponding subprocess.stdin, subprocess.stdout, and
subprocess.stderr.
In your options use
stdio: ['inherit', 'inherit', 'pipe']
And then check for stderr. An example:
var spawn = childProcess.spawnSync('node script.js', stdio: ['inherit', 'inherit', 'pipe'] )
if (spawn.stderr)
console.log(Error(spawn.stderr))
process.exit(1)
answered Mar 8 at 8:39
João Pimentel FerreiraJoão Pimentel Ferreira
4,17622331
In Node documentation regarding options.stdio it says
By default, the child's stdin, stdout, and stderr are redirected to
corresponding subprocess.stdin, subprocess.stdout, and
subprocess.stderr.
In your options use
stdio: ['inherit', 'inherit', 'pipe']
And then check for stderr. An example:
var spawn = childProcess.spawnSync('node script.js', stdio: ['inherit', 'inherit', 'pipe'] )
if (spawn.stderr)
console.log(Error(spawn.stderr))
process.exit(1)
answered Mar 8 at 8:39
João Pimentel FerreiraJoão Pimentel Ferreira
4,17622331
answered Mar 8 at 8:39
João Pimentel FerreiraJoão Pimentel Ferreira
4,17622331
answered Mar 8 at 8:39
João Pimentel FerreiraJoão Pimentel Ferreira
4,17622331
answered Mar 8 at 8:39
João Pimentel FerreiraJoão Pimentel Ferreira
4,17622331
4,17622331
add a comment |
add a comment |
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If I do this
cmd.stderr.toString(), I can see the error, but cmd,error is still undefined...– Duke
Oct 20 '16 at 8:56