feat: Support configuration file for hmsecrets.

cmd/hmsecrets/main.go

@@ -1,6 +1,8 @@
 package main
 
-import "git.handmadecities.com/HMC/shhh/internal/clis/hmsecrets"
+import (
+	"git.handmadecities.com/HMC/shhh/internal/clis/hmsecrets"
+)
 
 func main() {
 	hmsecrets.Execute()

go.mod

@@ -11,4 +11,5 @@ require (
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/spf13/pflag v1.0.10 // indirect
 	golang.org/x/sys v0.45.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

internal/clis/hmsecrets/cli.go

@@ -2,8 +2,8 @@ package hmsecrets
 
 import "git.handmadecities.com/HMC/shhh/pkg/secretsclient"
 
-func getClient(base, ca, cert, certKey string) secretsclient.Client {
-	cli, err := secretsclient.New(base, ca, cert, certKey)
+func getClient() secretsclient.Client {
+	cli, err := secretsclient.New(conf.APIBase, conf.CA, conf.ClientCert, conf.ClientKey)
 	if err != nil {
 		panic(err)
 	}

internal/clis/hmsecrets/config.go

@@ -0,0 +1,83 @@
+package hmsecrets
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path"
+	"runtime"
+
+	"gopkg.in/yaml.v3"
+)
+
+type config struct {
+	APIBase    string `yaml:"api-base"`
+	CA         string `yaml:"ca"`
+	ClientCert string `yaml:"client-cert"`
+	ClientKey  string `yaml:"client-key"`
+}
+
+func mustLoadConfig() config {
+	var baseConfigDir string
+	var err error
+	switch runtime.GOOS {
+	case "windows":
+		fallthrough
+	case "linux":
+		baseConfigDir, err = os.UserConfigDir()
+		if err != nil {
+			panic(fmt.Errorf("determining user config dir: %w", err))
+		}
+	case "darwin":
+		// We want $HOME/.config in macOS.
+		homeDir, err := os.UserHomeDir()
+		if err != nil {
+			panic(fmt.Errorf("determining user home dir: %w", err))
+		}
+		baseConfigDir = path.Join(homeDir, ".config")
+	}
+
+	configDir := path.Join(baseConfigDir, "hmsecrets")
+
+	configBytes, err := os.ReadFile(path.Join(configDir, "config.yaml"))
+	if err != nil {
+		panic(fmt.Errorf("reading config file: %w", err))
+	}
+	var conf config
+	err = yaml.Unmarshal(configBytes, &conf)
+	if err != nil {
+		panic(fmt.Errorf("parsing config file: %w", err))
+	}
+
+	if conf.APIBase == "" {
+		panic(errors.New("api base must be present in config"))
+	}
+
+	if conf.CA == "" {
+		conf.CA = path.Join(configDir, "ca.crt")
+	}
+	if !fileAccesible(conf.CA) {
+		panic(fmt.Errorf("ca file '%s' does not exist or is inaccesible", conf.CA))
+	}
+
+	if conf.ClientCert == "" {
+		conf.ClientCert = path.Join(configDir, "client.crt")
+	}
+	if !fileAccesible(conf.ClientCert) {
+		panic(fmt.Errorf("client cert file '%s' does not exist or is inaccesible", conf.ClientCert))
+	}
+
+	if conf.ClientKey == "" {
+		conf.ClientKey = path.Join(configDir, "client.key")
+	}
+	if !fileAccesible(conf.ClientKey) {
+		panic(fmt.Errorf("client key file '%s' does not exist or is inaccesible", conf.ClientKey))
+	}
+
+	return conf
+}
+
+func fileAccesible(f string) bool {
+	_, err := os.Stat(f)
+	return err == nil
+}

internal/clis/hmsecrets/delete.go

@@ -13,7 +13,7 @@ var delCmd = &cobra.Command{
 	Short: "del [key]",
 	Args:  cobra.ExactArgs(1),
 	RunE: func(cmd *cobra.Command, args []string) error {
-		cli := getClient(apiBase, caFile, clientCert, clientKey)
+		cli := getClient()
 		err := cli.Delete(args[0])
 		if err != nil {
 			return err

internal/clis/hmsecrets/get-arr.go

@@ -15,7 +15,7 @@ var getArrCmd = &cobra.Command{
 	Short: "get-array [key]",
 	Args:  cobra.ExactArgs(1),
 	RunE: func(cmd *cobra.Command, args []string) error {
-		cli := getClient(apiBase, caFile, clientCert, clientKey)
+		cli := getClient()
 		secret, err := cli.GetStringArr(args[0])
 		if err != nil {
 			return err

internal/clis/hmsecrets/get-map.go

@@ -15,7 +15,7 @@ var getMapCmd = &cobra.Command{
 	Short: "get-map [key]",
 	Args:  cobra.ExactArgs(1),
 	RunE: func(cmd *cobra.Command, args []string) error {
-		cli := getClient(apiBase, caFile, clientCert, clientKey)
+		cli := getClient()
 		secret, err := cli.GetStringMap(args[0])
 		if err != nil {
 			return err

internal/clis/hmsecrets/get.go

@@ -15,7 +15,7 @@ var getCmd = &cobra.Command{
 	Short: "get [key]",
 	Args:  cobra.ExactArgs(1),
 	RunE: func(cmd *cobra.Command, args []string) error {
-		cli := getClient(apiBase, caFile, clientCert, clientKey)
+		cli := getClient()
 		secret, err := cli.GetString(args[0])
 		if err != nil {
 			return err

internal/clis/hmsecrets/rootcmd.go

@@ -7,44 +7,7 @@ import (
 	"github.com/spf13/cobra"
 )
 
-var apiBase string
-var caFile string
-var clientCert string
-var clientKey string
-
-func init() {
-	rootCmd.PersistentFlags().StringVar(
-		&apiBase,
-		"api-base",
-		"",
-		"base url for the service",
-	)
-	rootCmd.MarkPersistentFlagRequired("api-base")
-
-	rootCmd.PersistentFlags().StringVar(
-		&caFile,
-		"ca-file",
-		"",
-		"CA cert file",
-	)
-	rootCmd.MarkPersistentFlagRequired("ca-file")
-
-	rootCmd.PersistentFlags().StringVar(
-		&clientCert,
-		"client-cert",
-		"",
-		"certificate to be used for client mTLS auth",
-	)
-	rootCmd.MarkPersistentFlagRequired("client-cert")
-
-	rootCmd.PersistentFlags().StringVar(
-		&clientKey,
-		"client-key",
-		"",
-		"private key for the certificate to be used for client mTLS auth",
-	)
-	rootCmd.MarkPersistentFlagRequired("client-key")
-}
+var conf config
 
 var rootCmd = &cobra.Command{
 	Use:   "hmsecrets",
@@ -52,6 +15,15 @@ var rootCmd = &cobra.Command{
 }
 
 func Execute() {
+	defer func() {
+		if r := recover(); r != nil {
+			fmt.Printf("%+v\n", r)
+			os.Exit(1)
+		}
+	}()
+
+	conf = mustLoadConfig()
+
 	if err := rootCmd.Execute(); err != nil {
 		fmt.Fprintln(os.Stderr, err)
 		os.Exit(1)

internal/clis/hmsecrets/set-arr.go

@@ -24,7 +24,7 @@ var setArrCmd = &cobra.Command{
 	Short: "set-array [key]",
 	Args:  cobra.ExactArgs(1),
 	RunE: func(cmd *cobra.Command, args []string) error {
-		cli := getClient(apiBase, caFile, clientCert, clientKey)
+		cli := getClient()
 		err := cli.PutStringArr(args[0], arrValue)
 		if err != nil {
 			return err

internal/clis/hmsecrets/set-map.go

@@ -24,7 +24,7 @@ var setMapCmd = &cobra.Command{
 	Short: "set-map [key]",
 	Args:  cobra.ExactArgs(1),
 	RunE: func(cmd *cobra.Command, args []string) error {
-		cli := getClient(apiBase, caFile, clientCert, clientKey)
+		cli := getClient()
 		err := cli.PutStringMap(args[0], mapValue)
 		if err != nil {
 			return err

internal/clis/hmsecrets/set.go

@@ -13,7 +13,7 @@ var setCmd = &cobra.Command{
 	Short: "set [key] [value]",
 	Args:  cobra.ExactArgs(2),
 	RunE: func(cmd *cobra.Command, args []string) error {
-		cli := getClient(apiBase, caFile, clientCert, clientKey)
+		cli := getClient()
 		err := cli.PutString(args[0], args[1])
 		if err != nil {
 			return err