hcq/MaxScale
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

MXS-1300: Make MaxCtrl more like a library

Browse Source 
All invocations into the common helper functions are now done through the
`maxctrl` function. This allows the program arguments to be passed to the
core as a parameter instead of reading them from global variables.

This helps with the implicit initialization that was done when the yargs
library was required which caused duplicated output.

Refactored the core functions so that they only process the argument
vector. The parsing of the argument vector is done in maxctrl.js where it
is more appropriate.
This commit is contained in:
Markus Mäkelä
2017-07-13 19:54:19 +03:00
parent 67b2654f50
commit 816e317485
18 changed files with 271 additions and 211 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
maxctrl/lib/alter.js
View File

@ -18,19 +18,24 @@ exports.handler = function() {}
exports.builder = function(yargs) {
yargs
.command('server <server> <key> <value>', 'Alter server parameters', {}, function(argv) {
updateValue('servers/' + argv.server, 'data.attributes.parameters.' + argv.key, argv.value)
maxctrl(argv)
.updateValue('servers/' + argv.server, 'data.attributes.parameters.' + argv.key, argv.value)
})
.command('monitor <monitor> <key> <value>', 'Alter monitor parameters', {}, function(argv) {
updateValue('monitors/' + argv.monitor, 'data.attributes.parameters.' + argv.key, argv.value)
maxctrl(argv)
.updateValue('monitors/' + argv.monitor, 'data.attributes.parameters.' + argv.key, argv.value)
})
.command('service <service> <key> <value>', 'Alter service parameters', {}, function(argv) {
updateValue('services/' + argv.service, 'data.attributes.parameters.' + argv.key, argv.value)
maxctrl(argv)
.updateValue('services/' + argv.service, 'data.attributes.parameters.' + argv.key, argv.value)
})
.command('logging <key> <value>', 'Alter logging parameters', {}, function(argv) {
updateValue('maxscale/logs', 'attributes.parameters.' + argv.key, argv.value)
maxctrl(argv)
.updateValue('maxscale/logs', 'attributes.parameters.' + argv.key, argv.value)
})
.command('maxscale <key> <value>', 'Alter MaxScale parameters', {}, function(argv) {
updateValue('maxscale', 'attributes.parameters.' + argv.key, argv.value)
maxctrl(argv)
.updateValue('maxscale', 'attributes.parameters.' + argv.key, argv.value)
})
.usage('Usage: alter <command>')
.help()

28
maxctrl/lib/call.js
View File

@ -20,22 +20,24 @@ exports.builder = function(yargs) {
.command('command <module> <command> [parameters...]', 'Call a module command', {}, function(argv) {
// First we have to find the correct method to use
doRequest('maxscale/modules/' + argv.module + '/', function(resp) {
maxctrl(argv)
.doRequest('maxscale/modules/' + argv.module + '/', function(resp) {
// A GET request will return the correct error if the command is not found
var verb = 'GET'
// A GET request will return the correct error if the command is not found
var verb = 'GET'
resp.data.attributes.commands.forEach(function(i) {
if (i.id == argv.command) {
verb = i.attributes.method;
}
resp.data.attributes.commands.forEach(function(i) {
if (i.id == argv.command) {
verb = i.attributes.method;
}
})
maxctrl
.doRequest('maxscale/modules/' + argv.module + '/' + argv.command + '?' + argv.parameters.join('&'),
function(resp) {
console.log(JSON.stringify(resp, null, 4))
}, { method: verb })
})
doRequest('maxscale/modules/' + argv.module + '/' + argv.command + '?' + argv.parameters.join('&'),
function(resp) {
console.log(JSON.stringify(resp, null, 4))
}, { method: verb })
})
})
.usage('Usage: call <command>')
.help()

3
maxctrl/lib/clear.js
View File

@ -19,7 +19,8 @@ exports.builder = function(yargs) {
yargs
.command('server <server> <state>', 'Clear server state', {}, function(argv) {
var target = 'servers/' + argv.server + '/clear?state=' + argv.state
doRequest(target, null, {method: 'PUT'})
maxctrl(argv)
.doRequest(target, null, {method: 'PUT'})
})
.usage('Usage: clear <command>')
.help()

12
maxctrl/lib/create.js
View File

@ -71,7 +71,8 @@ exports.builder = function(yargs) {
}
}
doRequest('servers', null, {method: 'POST', body: server})
maxctrl(argv)
.doRequest('servers', null, {method: 'POST', body: server})
})
// Create monitor
@ -97,7 +98,8 @@ exports.builder = function(yargs) {
}
}
doRequest('monitors', null, {method: 'POST', body: monitor})
maxctrl(argv)
.doRequest('monitors', null, {method: 'POST', body: monitor})
})
// Create listener
@ -157,7 +159,8 @@ exports.builder = function(yargs) {
}
}
doRequest('services/' + argv.service + '/listeners', null, {method: 'POST', body: listener})
maxctrl(argv)
.doRequest('services/' + argv.service + '/listeners', null, {method: 'POST', body: listener})
})
.command('user <name> <password>', 'Create a new network user', {}, function(argv) {
@ -171,7 +174,8 @@ exports.builder = function(yargs) {
}
}
doRequest('users/inet', null, {method: 'POST', body: user})
maxctrl(argv)
.doRequest('users/inet', null, {method: 'POST', body: user})
})
.usage('Usage: create <command>')

12
maxctrl/lib/destroy.js
View File

@ -18,16 +18,20 @@ exports.handler = function() {}
exports.builder = function(yargs) {
yargs
.command('server <name>', 'Destroy an unused server', {}, function(argv) {
doRequest('servers/' + argv.name, null, {method: 'DELETE'})
maxctrl(argv)
.doRequest('servers/' + argv.name, null, {method: 'DELETE'})
})
.command('monitor <name>', 'Destroy an unused monitor', {}, function(argv) {
doRequest('monitors/' + argv.name, null, {method: 'DELETE'})
maxctrl(argv)
.doRequest('monitors/' + argv.name, null, {method: 'DELETE'})
})
.command('listener <service> <name>', 'Destroy an unused listener', {}, function(argv) {
doRequest('services/' + argv.service + '/listeners/' + argv.name, null, {method: 'DELETE'})
maxctrl(argv)
.doRequest('services/' + argv.service + '/listeners/' + argv.name, null, {method: 'DELETE'})
})
.command('user <name>', 'Remove a network user', {}, function(argv) {
doRequest('users/inet/' + argv.name, null, {method: 'DELETE'})
maxctrl(argv)
.doRequest('users/inet/' + argv.name, null, {method: 'DELETE'})
})
.usage('Usage: destroy <command>')
.help()

15
maxctrl/lib/disable.js
View File

@ -26,19 +26,24 @@ exports.builder = function(yargs) {
yargs
.command('log-priority <log>', 'Disable log priority [warning|notice|info|debug]', {}, function(argv) {
if (log_levels.indexOf(argv.log) != -1) {
updateValue('maxscale/logs', 'data.attributes.parameters.log_' + argv.log, false)
maxctrl(argv)
.updateValue('maxscale/logs', 'data.attributes.parameters.log_' + argv.log, false)
} else {
logError('Invalid log priority: ' + argv.log);
maxctrl(argv)
.logError('Invalid log priority: ' + argv.log);
}
})
.command('maxlog', 'Disable MaxScale logging', {}, function(argv) {
updateValue('maxscale/logs', 'data.attributes.parameters.maxlog', false)
maxctrl(argv)
.updateValue('maxscale/logs', 'data.attributes.parameters.maxlog', false)
})
.command('syslog', 'Disable syslog logging', {}, function(argv) {
updateValue('maxscale/logs', 'data.attributes.parameters.syslog', false)
maxctrl(argv)
.updateValue('maxscale/logs', 'data.attributes.parameters.syslog', false)
})
.command('account <name>', 'Disable a Linux user account from administrative use', {}, function(argv) {
doRequest('users/unix/' + argv.name, null, { method: 'DELETE'})
maxctrl(argv)
.doRequest('users/unix/' + argv.name, null, { method: 'DELETE'})
})
.usage('Usage: disable <command>')
.help()

15
maxctrl/lib/enable.js
View File

@ -26,16 +26,20 @@ exports.builder = function(yargs) {
yargs
.command('log-priority <log>', 'Enable log priority [warning|notice|info|debug]', {}, function(argv) {
if (log_levels.indexOf(argv.log) != -1) {
updateValue('maxscale/logs', 'data.attributes.parameters.log_' + argv.log, true)
maxctrl(argv)
.updateValue('maxscale/logs', 'data.attributes.parameters.log_' + argv.log, true)
} else {
logError('Invalid log priority: ' + argv.log);
maxctrl(argv)
.logError('Invalid log priority: ' + argv.log);
}
})
.command('maxlog', 'Enable MaxScale logging', {}, function(argv) {
updateValue('maxscale/logs', 'data.attributes.parameters.maxlog', true)
maxctrl(argv)
.updateValue('maxscale/logs', 'data.attributes.parameters.maxlog', true)
})
.command('syslog', 'Enable syslog logging', {}, function(argv) {
updateValue('maxscale/logs', 'data.attributes.parameters.syslog', true)
maxctrl(argv)
.updateValue('maxscale/logs', 'data.attributes.parameters.syslog', true)
})
.command('account <name>', 'Activate a Linux user account for administrative use', {}, function(argv) {
var req_body = {
@ -44,7 +48,8 @@ exports.builder = function(yargs) {
type: 'unix'
}
}
doRequest('users/unix', null, { method: 'POST', body: req_body})
maxctrl(argv)
.doRequest('users/unix', null, { method: 'POST', body: req_body})
})
.usage('Usage: enable <command>')
.help()

30
maxctrl/lib/link.js
View File

@ -12,20 +12,22 @@
*/
require('../common.js')()
function addServer(path, targets) {
doRequest(path, function(res) {
var servers =_.get(res, 'data.relationships.servers.data', [])
function addServer(argv, path, targets) {
maxctrl(argv)
.doRequest(path, function(res) {
var servers =_.get(res, 'data.relationships.servers.data', [])
targets.forEach(function(i){
servers.push({id: i, type: 'servers'})
targets.forEach(function(i){
servers.push({id: i, type: 'servers'})
})
// Update relationships and remove unnecessary parts
_.set(res, 'data.relationships.servers.data', servers)
delete res.data.attributes
maxctrl(argv)
.doRequest(path, null, {method: 'PATCH', body: res})
})
// Update relationships and remove unnecessary parts
_.set(res, 'data.relationships.servers.data', servers)
delete res.data.attributes
doRequest(path, null, {method: 'PATCH', body: res})
})
}
exports.command = 'link <command>'
@ -34,10 +36,10 @@ exports.handler = function() {}
exports.builder = function(yargs) {
yargs
.command('service <name> <server...>', 'Link servers to a service', {}, function(argv) {
addServer('services/' + argv.name, argv.server)
addServer(argv, 'services/' + argv.name, argv.server)
})
.command('monitor <name> <server...>', 'Link servers to a monitor', {}, function(argv) {
addServer('monitors/' + argv.name, argv.server)
addServer(argv, 'monitors/' + argv.name, argv.server)
})
.usage('Usage: link <command>')
.help()

108
maxctrl/lib/list.js
View File

@ -18,63 +18,71 @@ exports.desc = 'List objects'
exports.handler = function() {}
exports.builder = function(yargs) {
yargs
.command('servers', 'List servers', {}, function() {
getCollection('servers', [
{'Server': 'id'},
{'Address': 'attributes.parameters.address'},
{'Port': 'attributes.parameters.port'},
{'Connections': 'attributes.statistics.connections'},
{'State': 'attributes.state'}
])
.command('servers', 'List servers', {}, function(argv) {
maxctrl(argv)
.getCollection('servers', [
{'Server': 'id'},
{'Address': 'attributes.parameters.address'},
{'Port': 'attributes.parameters.port'},
{'Connections': 'attributes.statistics.connections'},
{'State': 'attributes.state'}
])
})
.command('services', 'List services', {}, function() {
getCollection('services',[
{'Service': 'id'},
{'Router': 'attributes.router'},
{'Connections': 'attributes.connections'},
{'Total Connections': 'attributes.total_connections'},
{'Servers': 'relationships.servers.data[].id'}
])
.command('services', 'List services', {}, function(argv) {
maxctrl(argv)
.getCollection('services',[
{'Service': 'id'},
{'Router': 'attributes.router'},
{'Connections': 'attributes.connections'},
{'Total Connections': 'attributes.total_connections'},
{'Servers': 'relationships.servers.data[].id'}
])
})
.command('monitors', 'List monitors', {}, function() {
getCollection('monitors', [
{'Monitor': 'id'},
{'State': 'attributes.state'},
{'Servers': 'relationships.servers.data[].id'}
])
.command('monitors', 'List monitors', {}, function(argv) {
maxctrl(argv)
.getCollection('monitors', [
{'Monitor': 'id'},
{'State': 'attributes.state'},
{'Servers': 'relationships.servers.data[].id'}
])
})
.command('sessions', 'List sessions', {}, function() {
getCollection('sessions',[
{'Id': 'id'},
{'Service': 'relationships.services.data[].id'},
{'User': 'attributes.user'},
{'Host': 'attributes.remote'}
])
.command('sessions', 'List sessions', {}, function(argv) {
maxctrl(argv)
.getCollection('sessions',[
{'Id': 'id'},
{'Service': 'relationships.services.data[].id'},
{'User': 'attributes.user'},
{'Host': 'attributes.remote'}
])
})
.command('filters', 'List filters', {}, function() {
getCollection('filters', [
{'Filter': 'id'},
{'Service': 'relationships.services.data[].id'},
{'Module': 'attributes.module'}
])
.command('filters', 'List filters', {}, function(argv) {
maxctrl(argv)
.getCollection('filters', [
{'Filter': 'id'},
{'Service': 'relationships.services.data[].id'},
{'Module': 'attributes.module'}
])
})
.command('modules', 'List loaded modules', {}, function() {
getCollection('maxscale/modules',[
{'Module':'id'},
{'Type':'attributes.module_type'},
{'Version': 'attributes.version'}
])
.command('modules', 'List loaded modules', {}, function(argv) {
maxctrl(argv)
.getCollection('maxscale/modules',[
{'Module':'id'},
{'Type':'attributes.module_type'},
{'Version': 'attributes.version'}
])
})
.command('users', 'List created network users', {}, function() {
getCollection('users/inet',[
{'Name':'id'}
])
.command('users', 'List created network users', {}, function(argv) {
maxctrl(argv)
.getCollection('users/inet',[
{'Name':'id'}
])
})
.command('commands', 'List module commands', {}, function() {
getCollection('maxscale/modules',[
{'Module':'id'},
{'Commands': 'attributes.commands[].id'}
])
.command('commands', 'List module commands', {}, function(argv) {
maxctrl(argv)
.getCollection('maxscale/modules',[
{'Module':'id'},
{'Commands': 'attributes.commands[].id'}
])
})
.usage('Usage: list <command>')
.help()

3
maxctrl/lib/rotate.js
View File

@ -18,7 +18,8 @@ exports.handler = function() {}
exports.builder = function(yargs) {
yargs
.command('logs', 'Rotate log files by closing and reopening the files', {}, function(argv) {
doRequest('maxscale/logs/flush/', null, {method: 'POST'})
maxctrl(argv)
.doRequest('maxscale/logs/flush/', null, {method: 'POST'})
})
.usage('Usage: rotate <command>')
.help()

3
maxctrl/lib/set.js
View File

@ -19,7 +19,8 @@ exports.builder = function(yargs) {
yargs
.command('server <server> <state>', 'Set server state', {}, function(argv) {
var target = 'servers/' + argv.server + '/set?state=' + argv.state
doRequest(target, null, {method: 'PUT'})
maxctrl(argv)
.doRequest(target, null, {method: 'PUT'})
})
.usage('Usage: set <command>')
.help()

140
maxctrl/lib/show.js
View File

@ -19,86 +19,94 @@ exports.handler = function() {}
exports.builder = function(yargs) {
yargs
.command('server <server>', 'Show server', {}, function(argv) {
getResource('servers/' + argv.server, [
{'Server': 'id'},
{'Address': 'attributes.parameters.address'},
{'Port': 'attributes.parameters.port'},
{'State': 'attributes.state'},
{'Services': 'relationships.services.data[].id'},
{'Monitors': 'relationships.monitors.data[].id'},
{'Master ID': 'attributes.master_id'},
{'Node ID': 'attributes.node_id'},
{'Slave Server IDs': 'attributes.slaves'},
{'Statistics': 'attributes.statistics'},
{'Parameters': 'attributes.parameters'}
])
maxctrl(argv)
.getResource('servers/' + argv.server, [
{'Server': 'id'},
{'Address': 'attributes.parameters.address'},
{'Port': 'attributes.parameters.port'},
{'State': 'attributes.state'},
{'Services': 'relationships.services.data[].id'},
{'Monitors': 'relationships.monitors.data[].id'},
{'Master ID': 'attributes.master_id'},
{'Node ID': 'attributes.node_id'},
{'Slave Server IDs': 'attributes.slaves'},
{'Statistics': 'attributes.statistics'},
{'Parameters': 'attributes.parameters'}
])
})
.command('service <service>', 'Show service', {}, function(argv) {
getResource('services/' + argv.service, [
{'Service': 'id'},
{'Router': 'attributes.router'},
{'State': 'attributes.state'},
{'Started At': 'attributes.started'},
{'Current Connections': 'attributes.connections'},
{'Total Connections': 'attributes.total_connections'},
{'Servers': 'relationships.servers.data[].id'},
{'Parameters': 'attributes.parameters'},
{'Router Diagnostics': 'attributes.router_diagnostics'}
])
maxctrl(argv)
.getResource('services/' + argv.service, [
{'Service': 'id'},
{'Router': 'attributes.router'},
{'State': 'attributes.state'},
{'Started At': 'attributes.started'},
{'Current Connections': 'attributes.connections'},
{'Total Connections': 'attributes.total_connections'},
{'Servers': 'relationships.servers.data[].id'},
{'Parameters': 'attributes.parameters'},
{'Router Diagnostics': 'attributes.router_diagnostics'}
])
})
.command('monitor <monitor>', 'Show monitor', {}, function(argv) {
getResource('monitors/' + argv.monitor, [
{'Monitor': 'id'},
{'State': 'attributes.state'},
{'Servers': 'relationships.servers.data[].id'},
{'Parameters': 'attributes.parameters'},
{'Monitor Diagnostics': 'attributes.monitor_diagnostics'}
])
maxctrl(argv)
.getResource('monitors/' + argv.monitor, [
{'Monitor': 'id'},
{'State': 'attributes.state'},
{'Servers': 'relationships.servers.data[].id'},
{'Parameters': 'attributes.parameters'},
{'Monitor Diagnostics': 'attributes.monitor_diagnostics'}
])
})
.command('session <session>', 'Show session', {}, function(argv) {
getResource('sessions/' + argv.session, [
{'Id': 'id'},
{'Service': 'relationships.services.data[].id'},
{'State': 'attributes.state'},
{'User': 'attributes.user'},
{'Host': 'attributes.remote'},
{'Connected': 'attributes.connected'},
{'Idle': 'attributes.idle'}
])
maxctrl(argv)
.getResource('sessions/' + argv.session, [
{'Id': 'id'},
{'Service': 'relationships.services.data[].id'},
{'State': 'attributes.state'},
{'User': 'attributes.user'},
{'Host': 'attributes.remote'},
{'Connected': 'attributes.connected'},
{'Idle': 'attributes.idle'}
])
})
.command('filter <filter>', 'Show filter', {}, function(argv) {
getResource('filters/' + argv.filter, [
{'Filter': 'id'},
{'Module': 'attributes.module'},
{'Services': 'relationships.services.data[].id'},
{'Parameters': 'attributes.parameters'}
])
maxctrl(argv)
.getResource('filters/' + argv.filter, [
{'Filter': 'id'},
{'Module': 'attributes.module'},
{'Services': 'relationships.services.data[].id'},
{'Parameters': 'attributes.parameters'}
])
})
.command('module <module>', 'Show loaded module', {}, function(argv) {
getResource('maxscale/modules/' + argv.module, [
{'Module': 'id'},
{'Type': 'attributes.module_type'},
{'Version': 'attributes.version'},
{'Maturity': 'attributes.maturity'},
{'Description': 'attributes.description'},
{'Parameters': 'attributes.parameters'},
{'Commands': 'attributes.commands'}
])
maxctrl(argv)
.getResource('maxscale/modules/' + argv.module, [
{'Module': 'id'},
{'Type': 'attributes.module_type'},
{'Version': 'attributes.version'},
{'Maturity': 'attributes.maturity'},
{'Description': 'attributes.description'},
{'Parameters': 'attributes.parameters'},
{'Commands': 'attributes.commands'}
])
})
.command('maxscale', 'Show MaxScale information', {}, function(argv) {
getResource('maxscale', [
{'Version': 'attributes.version'},
{'Commit': 'attributes.commit'},
{'Started At': 'attributes.started_at'},
{'Uptime': 'attributes.uptime'}
])
maxctrl(argv)
.getResource('maxscale', [
{'Version': 'attributes.version'},
{'Commit': 'attributes.commit'},
{'Started At': 'attributes.started_at'},
{'Uptime': 'attributes.uptime'}
])
})
.command('commands <module>', 'Show module commands of a module', {}, function(argv) {
getSubCollection('maxscale/modules/' + argv.module, 'attributes.commands', [
{'Command': 'id'},
{'Parameters': 'attributes.parameters[].type'},
{'Descriptions': 'attributes.parameters[].description'}
])
maxctrl(argv)
.getSubCollection('maxscale/modules/' + argv.module, 'attributes.commands', [
{'Command': 'id'},
{'Parameters': 'attributes.parameters[].type'},
{'Descriptions': 'attributes.parameters[].description'}
])
})
.usage('Usage: show <command>')
.help()

6
maxctrl/lib/start.js
View File

@ -18,10 +18,12 @@ exports.handler = function() {}
exports.builder = function(yargs) {
yargs
.command('service <name>', 'Start a service', {}, function(argv) {
doRequest('services/' + argv.name + '/start', null, {method: 'PUT'})
maxctrl(argv)
.doRequest('services/' + argv.name + '/start', null, {method: 'PUT'})
})
.command('monitor <name>', 'Start a monitor', {}, function(argv) {
doRequest('monitors/' + argv.name + '/start', null, {method: 'PUT'})
maxctrl(argv)
.doRequest('monitors/' + argv.name + '/start', null, {method: 'PUT'})
})
.usage('Usage: start <command>')
.help()

6
maxctrl/lib/stop.js
View File

@ -18,10 +18,12 @@ exports.handler = function() {}
exports.builder = function(yargs) {
yargs
.command('service <name>', 'Stop a service', {}, function(argv) {
doRequest('services/' + argv.name + '/stop', null, {method: 'PUT'})
maxctrl(argv)
.doRequest('services/' + argv.name + '/stop', null, {method: 'PUT'})
})
.command('monitor <name>', 'Stop a monitor', {}, function(argv) {
doRequest('monitors/' + argv.name + '/stop', null, {method: 'PUT'})
maxctrl(argv)
.doRequest('monitors/' + argv.name + '/stop', null, {method: 'PUT'})
})
.usage('Usage: stop <command>')
.help()

30
maxctrl/lib/unlink.js
View File

@ -12,20 +12,22 @@
*/
require('../common.js')()
function removeServer(path, targets) {
doRequest(path, function(res) {
var servers =_.get(res, 'data.relationships.servers.data', [])
function removeServer(argv, path, targets) {
maxctrl(argv)
.doRequest(path, function(res) {
var servers =_.get(res, 'data.relationships.servers.data', [])
_.remove(servers, function(i) {
return targets.indexOf(i.id) != -1
_.remove(servers, function(i) {
return targets.indexOf(i.id) != -1
})
// Update relationships and remove unnecessary parts
_.set(res, 'data.relationships.servers.data', servers)
delete res.data.attributes
maxctrl(argv)
.doRequest(path, null, {method: 'PATCH', body: res})
})
// Update relationships and remove unnecessary parts
_.set(res, 'data.relationships.servers.data', servers)
delete res.data.attributes
doRequest(path, null, {method: 'PATCH', body: res})
})
}
exports.command = 'unlink <command>'
@ -34,10 +36,10 @@ exports.handler = function() {}
exports.builder = function(yargs) {
yargs
.command('service <name> <server...>', 'Unlink servers from a service', {}, function(argv) {
removeServer('services/' + argv.name, argv.server)
removeServer(argv, 'services/' + argv.name, argv.server)
})
.command('monitor <name> <server...>', 'Unlink servers from a monitor', {}, function(argv) {
removeServer('monitors/' + argv.name, argv.server)
removeServer(argv, 'monitors/' + argv.name, argv.server)
})
.usage('Usage: unlink <command>')
.help()