Cli setup command (#3384)

Co-authored-by: Robert Kaussow <xoxys@rknet.org>

cli/internal/config/config.go

@@ -0,0 +1,131 @@
+package config
+
+import (
+	"encoding/json"
+	"errors"
+	"os"
+
+	"github.com/adrg/xdg"
+	"github.com/rs/zerolog/log"
+	"github.com/urfave/cli/v2"
+	"github.com/zalando/go-keyring"
+)
+
+type Config struct {
+	ServerURL string `json:"server_url"`
+	Token     string `json:"-"`
+	LogLevel  string `json:"log_level"`
+}
+
+func Load(c *cli.Context) error {
+	// If the command is setup, we don't need to load the config
+	if firstArg := c.Args().First(); firstArg == "setup" {
+		return nil
+	}
+
+	config, err := Get(c, c.String("config"))
+	if err != nil {
+		return err
+	}
+
+	if config == nil && !c.IsSet("server-url") && !c.IsSet("token") {
+		log.Info().Msg("The woodpecker-cli is not yet set up. Please run `woodpecker-cli setup`")
+		return errors.New("woodpecker-cli is not setup")
+	}
+
+	if !c.IsSet("server") {
+		err = c.Set("server", config.ServerURL)
+		if err != nil {
+			return err
+		}
+	}
+
+	if !c.IsSet("token") {
+		err = c.Set("token", config.Token)
+		if err != nil {
+			return err
+		}
+	}
+
+	if !c.IsSet("log-level") {
+		err = c.Set("log-level", config.LogLevel)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func getConfigPath(configPath string) (string, error) {
+	if configPath != "" {
+		return configPath, nil
+	}
+
+	configPath, err := xdg.ConfigFile("woodpecker/config.json")
+	if err != nil {
+		return "", err
+	}
+
+	return configPath, nil
+}
+
+func Get(ctx *cli.Context, _configPath string) (*Config, error) {
+	configPath, err := getConfigPath(_configPath)
+	if err != nil {
+		return nil, err
+	}
+
+	content, err := os.ReadFile(configPath)
+	if err != nil && !os.IsNotExist(err) {
+		log.Debug().Err(err).Msg("Failed to read the config file")
+		return nil, err
+	} else if err != nil && os.IsNotExist(err) {
+		log.Debug().Msg("The config file does not exist")
+		return nil, nil
+	}
+
+	c := &Config{}
+	err = json.Unmarshal(content, c)
+	if err != nil {
+		return nil, err
+	}
+
+	// load token from keyring
+	service := ctx.App.Name
+	secret, err := keyring.Get(service, c.ServerURL)
+	if err != nil && !errors.Is(err, keyring.ErrNotFound) {
+		return nil, err
+	}
+	if err == nil {
+		c.Token = secret
+	}
+
+	return c, nil
+}
+
+func Save(ctx *cli.Context, _configPath string, c *Config) error {
+	config, err := json.Marshal(c)
+	if err != nil {
+		return err
+	}
+
+	configPath, err := getConfigPath(_configPath)
+	if err != nil {
+		return err
+	}
+
+	// save token to keyring
+	service := ctx.App.Name
+	err = keyring.Set(service, c.ServerURL, c.Token)
+	if err != nil {
+		return err
+	}
+
+	err = os.WriteFile(configPath, config, 0o600)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}