cmd.go

package runner

import (
	"fmt"
	"io/ioutil"
	"os"
	"path/filepath"
	"text/template"

	"github.com/go-cmd/cmd"
	"github.com/rs/zerolog"
)

func RunCMD(name string, args ...string) (err error, stdout, stderr []string) {
	// helm template -f base.yaml -f base.values.yaml -f ns.yaml -f ns.values.yaml
	// ytt -f /chart-folder -f base.yaml -f ns.yaml -v ... -v ...
	c := cmd.NewCmd(name, args...)
	statusChan := c.Start()
	status := <-statusChan
	if status.Error != nil {
		return err, status.Stdout, status.Stderr
	}
	stdout = status.Stdout
	stderr = status.Stderr
	return
}

func NewCmdConfig(logger zerolog.Logger, configDir string, namespace string) (*CmdConfig, error) {
	cmdConfig := &CmdConfig{}
	cmdConfig.RootDir = configDir
	cmdConfig.Spec.Charts.Helm = make(map[string]CmdChart)
	cmdConfig.Spec.Charts.Ytt = make(map[string]CmdChart)
	cmdConfig.Namespace = namespace
	cmdConfig.Logger = logger

	baseCfg, err := NewConfig(configDir)
	if err != nil {
		return nil, err
	}

	nsCfgDir := filepath.Join(configDir, "environments", namespace)
	nsCfg, err := NewConfig(nsCfgDir)
	if err != nil && err != os.ErrNotExist {
		return nil, err
	}

	// first "import" all variables from baseCfg
	cmdConfig.Spec.Variables = baseCfg.Spec.Variables
	// then merge in all variables from the nsCfg
	cmdConfig.MergeVariables(nsCfg)

	for name, c := range baseCfg.Spec.Charts.Helm {
		cmdConfig.Spec.Charts.Helm[name] = NewCmdChartFromChart(c)
	}
	for name, c := range nsCfg.Spec.Charts.Helm {
		cmdConfig.Spec.Charts.Helm[name] = NewCmdChartFromChart(c)
	}

	cmdConfig.populate()

	tmpDir, err := os.MkdirTemp(os.TempDir(), "beaver-")
	if err != nil {
		return nil, fmt.Errorf("failed to create temp dir: %w", err)
	}

	// - hydrate
	if err := cmdConfig.hydrate(tmpDir); err != nil {
		return nil, err
	}