Initial Commit

cmd/root.go

@@ -0,0 +1,101 @@
+package cmd
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"git.cryptic.systems/volker.raschek/dcmerge/pkg/domain/dockerCompose"
+	"git.cryptic.systems/volker.raschek/dcmerge/pkg/fetcher"
+	"github.com/spf13/cobra"
+	"gopkg.in/yaml.v2"
+)
+
+func Execute(version string) error {
+	completionCmd := &cobra.Command{
+		Use:                   "completion [bash|zsh|fish|powershell]",
+		Short:                 "Generate completion script",
+		Long:                  "To load completions",
+		DisableFlagsInUseLine: true,
+		ValidArgs:             []string{"bash", "zsh", "fish", "powershell"},
+		Args:                  cobra.ExactValidArgs(1),
+		Run: func(cmd *cobra.Command, args []string) {
+			switch args[0] {
+			case "bash":
+				cmd.Root().GenBashCompletion(os.Stdout)
+			case "zsh":
+				cmd.Root().GenZshCompletion(os.Stdout)
+			case "fish":
+				cmd.Root().GenFishCompletion(os.Stdout, true)
+			case "powershell":
+				cmd.Root().GenPowerShellCompletionWithDesc(os.Stdout)
+			}
+		},
+	}
+
+	rootCmd := &cobra.Command{
+		Use:   "dcmerge",
+		Args:  cobra.MinimumNArgs(2),
+		Short: "Merge docker-compose files from multiple resources",
+		Example: `dcmerge docker-compose.yml ./integration-test/docker-compose.yml
+dcmerge docker-compose.yml https://git.example.local/user/repo/docker-compose.yml`,
+		RunE:    run,
+		Version: version,
+	}
+	rootCmd.Flags().BoolP("last-merge", "l", false, "Overwrite existing attributes")
+	rootCmd.Flags().BoolP("output-file", "o", false, "Write instead on stdout into a file")
+	rootCmd.AddCommand(completionCmd)
+
+	return rootCmd.Execute()
+}
+
+func run(cmd *cobra.Command, args []string) error {
+	mergeLastWin, err := cmd.Flags().GetBool("last-merge")
+	if err != nil {
+		return fmt.Errorf("Failed to parse flag last-merge: %s", err)
+	}
+
+	outputFile, err := cmd.Flags().GetString("output-file")
+	if err != nil {
+		return fmt.Errorf("Failed to parse flag output-file: %s", err)
+	}
+
+	dockerComposeConfig := dockerCompose.NewConfig()
+
+	dockerComposeConfigs, err := fetcher.Fetch(args...)
+	if err != nil {
+		return err
+	}
+
+	for _, config := range dockerComposeConfigs {
+		switch {
+		case mergeLastWin:
+			dockerComposeConfig.MergeLastWin(config)
+		default:
+			dockerComposeConfig.Merge(config)
+		}
+
+	}
+
+	switch {
+	case len(outputFile) > 0:
+		err = os.MkdirAll(filepath.Dir(outputFile), 0755)
+		if err != nil {
+			return err
+		}
+
+		f, err := os.Create(outputFile)
+		if err != nil {
+			return err
+		}
+		defer f.Close()
+
+		yamlEncoder := yaml.NewEncoder(f)
+		return yamlEncoder.Encode(dockerComposeConfig)
+
+	default:
+		yamlEncoder := yaml.NewEncoder(os.Stdout)
+		return yamlEncoder.Encode(dockerComposeConfig)
+	}
+
+}