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cat.go
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cat.go
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/*
Copyright 2014 CoreOS, Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package main
import (
"fmt"
"github.com/coreos/fleet/schema"
)
var (
cmdCatUnit = &Command{
Name: "cat",
Summary: "Output the contents of a submitted unit",
Usage: "UNIT",
Description: `Outputs the unit file that is currently loaded in the cluster. Useful to verify
the correct version of a unit is running.`,
Run: runCatUnit,
}
)
func runCatUnit(args []string) (exit int) {
if len(args) != 1 {
stderr("One unit file must be provided")
return 1
}
name := unitNameMangle(args[0])
u, err := cAPI.Unit(name)
if err != nil {
stderr("Error retrieving Unit %s: %v", name, err)
return 1
}
if u == nil {
stderr("Unit %s not found", name)
return 1
}
uf := schema.MapSchemaUnitOptionsToUnitFile(u.Options)
// Must not add a newline here. The contents of the unit file
// must not be modified.
fmt.Print(uf.String())
return
}