build.go

package main

import (
	"log"

	"github.com/nesv/pm"
	"github.com/spf13/cobra"
)

var BuildCmd = &cobra.Command{
	Use:   "build",
	Short: "Build a package",
	Long: `
By default, the build command will look for a metadata.json file in the current
directory, but you can specify the path to the metadata file using the -m or 
--metadata flags.

For example, assuming the following fields in your metadata file:

{
	"name": "foo",
	"version": "0.1.0",
	"platform": "linux",
	"architecture": "amd64",
	"checksums": ["sha512"],
	...
}

...build will produce "foo-0.1.0-linux-amd64.tar.gz", and
"foo-0.1.0-linux-amd64.tar.gz.sha512".
`,
	Run: runBuild,
}

var (
	buildMetadataFile string
	buildOutputDir    string
)

func init() {
	BuildCmd.Flags().StringVarP(&buildMetadataFile, "metadata", "m", "metadata.json", "Path to the metadata.json file to use for the build")
	BuildCmd.Flags().StringVarP(&buildOutputDir, "output-dir", "o", ".", "Change the directory to put the resulting archive and checksum files in")
}

func runBuild(cmd *cobra.Command, args []string) {
	metadata, err := pm.LoadMetadata(buildMetadataFile)
	if err != nil {
		log.Fatalln(err)
	}

	if err := pm.Build(metadata, buildOutputDir); err != nil {
		log.Fatalln(err)
	}
}