From dde2a1702ea1283dc5b2754f751f9381e8d0f005 Mon Sep 17 00:00:00 2001
From: Paul Buetow <paul@buetow.org>
Date: Sat, 2 Oct 2021 11:54:07 +0300
Subject: reduce logging in serverless mode

---
 internal/config/config.go | 116 ++++++----------------------------------------
 1 file changed, 14 insertions(+), 102 deletions(-)

(limited to 'internal/config/config.go')

diff --git a/internal/config/config.go b/internal/config/config.go
index 6d4730a..09ae994 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -1,14 +1,5 @@
 package config
 
-import (
-	"encoding/json"
-	"flag"
-	"fmt"
-	"io/ioutil"
-	"os"
-	"strings"
-)
-
 const (
 	// ControlUser is used for various DTail specific operations.
 	ControlUser string = "DTAIL-CONTROL"
@@ -33,97 +24,18 @@ var Server *ServerConfig
 // Common holds common configs of both both, client and server.
 var Common *CommonConfig
 
-// Used to initialize the configuration.
-type configInitializer struct {
-	Common *CommonConfig
-	Server *ServerConfig
-	Client *ClientConfig
-}
-
-func (c *configInitializer) parseConfig(args *Args) {
-	if strings.ToUpper(args.ConfigFile) == "NONE" {
-		return
-	}
-
-	if args.ConfigFile != "" {
-		c.parseSpecificConfig(args.ConfigFile)
-		return
-	}
-
-	if homeDir, err := os.UserHomeDir(); err != nil {
-		var paths []string
-		paths = append(paths, fmt.Sprintf("%s/.config/dtail/dtail.conf", homeDir))
-		paths = append(paths, fmt.Sprintf("%s/.dtail.conf", homeDir))
-		for _, configPath := range paths {
-			if _, err := os.Stat(configPath); !os.IsNotExist(err) {
-				c.parseSpecificConfig(configPath)
-			}
-		}
-	}
-}
-
-func (c *configInitializer) parseSpecificConfig(configFile string) {
-	fd, err := os.Open(configFile)
-	if err != nil {
-		panic(fmt.Sprintf("Unable to read config file: %v", err))
-	}
-	defer fd.Close()
-
-	cfgBytes, err := ioutil.ReadAll(fd)
-	if err != nil {
-		panic(fmt.Sprintf("Unable to read config file %s: %v", configFile, err))
-	}
-
-	err = json.Unmarshal([]byte(cfgBytes), c)
-	if err != nil {
-		panic(fmt.Sprintf("Unable to parse config file %s: %v", configFile, err))
-	}
-}
-
-func (c *configInitializer) transformConfig(args *Args, additionalArgs []string,
-	client *ClientConfig, server *ServerConfig, common *CommonConfig) (*ClientConfig, *ServerConfig, *CommonConfig) {
-	if args.LogDir != "" {
-		common.LogDir = args.LogDir
-	}
-	if strings.Contains(common.LogDir, "~/") {
-		homeDir, err := os.UserHomeDir()
-		if err != nil {
-			panic(err)
-		}
-		common.LogDir = strings.ReplaceAll(common.LogDir, "~/", fmt.Sprintf("%s/", homeDir))
-	}
-	if common.LogStrategy == "" {
-		common.LogStrategy = "daily"
-	}
-
-	if args.LogLevel != "" {
-		common.LogLevel = args.LogLevel
-	}
-
-	if args.SSHPort != DefaultSSHPort {
-		common.SSHPort = args.SSHPort
-	}
-	if args.NoColor {
-		client.TermColorsEnable = false
-	}
-
-	if args.Spartan {
-		args.Quiet = true
-		args.NoColor = true
-	}
-
-	if args.Discovery == "" && args.ServersStr == "" {
-		args.Serverless = true
-	}
-
-	// Interpret additional args as file list.
-	if args.What == "" {
-		var files []string
-		for _, file := range flag.Args() {
-			files = append(files, file)
-		}
-		args.What = strings.Join(files, ",")
-	}
-
-	return client, server, common
+// Setup the DTail configuration.
+func Setup(args *Args, additionalArgs []string) {
+	initializer := initializer{
+		Common: newDefaultCommonConfig(),
+		Server: newDefaultServerConfig(),
+		Client: newDefaultClientConfig(),
+	}
+	initializer.parseConfig(args)
+	Client, Server, Common = initializer.transformConfig(
+		args, additionalArgs,
+		initializer.Client,
+		initializer.Server,
+		initializer.Common,
+	)
 }
-- 
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