a1c9e41957
This PS adds a gitreview file for AirshipCTL. Change-Id: Ib968f07083668591a73858f0b0647ae1d8e3655a Signed-off-by: Pete Birley <pete@port.direct> |
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cmd | ||
docs | ||
pkg | ||
test | ||
tools | ||
.gitignore | ||
.gitreview | ||
.travis.yml | ||
Dockerfile | ||
go.mod | ||
go.sum | ||
main.go | ||
Makefile | ||
README.md |
airshipctl
Custom Plugins Tutorial
This tutorial walks through a very basic plugin for airshipctl
. For a more
involved example, see Plugin Support
The following steps will get you started with a very rudimentary example plugin for airshipctl. First, create a directory for your project outside of the GOPATH:
mkdir /tmp/example
cd /tmp/example
This project will need to be a go module. You can initialize a module named
example
with the following:
go mod init example
Note that modules are a relatively new feature added to Go, so you'll need to
be running Go1.11 or greater. Also note that most modules will follow a naming
schema that matches the remote version control system. A more realistice module
name might look something like github.com/ian-howell/exampleplugin
.
Next, create a file main.go
and populate it with the following:
package main
import (
"fmt"
"os"
"github.com/ian-howell/airshipctl/cmd"
"github.com/spf13/cobra"
)
func main() {
rootCmd, _, err := cmd.NewRootCmd(os.Stdout)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create root airshipctl command: %s\n", err.Error())
os.Exit(1)
}
exampleCmd := &cobra.Command{
Use: "example",
Short: "an example plugin",
Run: func(cmd *cobra.Command, args []string) {
fmt.Fprintln(os.Stdout, "Hello airshipctl!")
},
}
rootCmd.AddCommand(exampleCmd)
if err := rootCmd.Execute(); err != nil {
fmt.Fprintf(os.Stderr, "Failure during execution: %s\n", err.Error())
os.Exit(1)
}
}
And finally, run the build command to download and compile airshipctl
:
go build -o airshipctl
Now that you've built airshipctl
, you can access your plugin with the following command:
./airshipctl example
You may have noticed that this example ignores the second return value from cmd.NewRootCmd. This value is a pointer to the AirshipCTLSettings, which contains various configuration details, such as the debug flag and the path to the config file*. A useful paradigm involves embedding this object into a custom ExampleSettings struct. This can be seen in the demo repo.
For a more involved example, see Plugin Support
* Work in progress