move args to config package

logger package rewrite as dlog

1 files changed, 35 insertions, 0 deletions

diff --git a/internal/config/setup.go b/internal/config/setup.go
new file mode 100644
index 0000000..3c4bcc4
--- /dev/null
+++ b/internal/config/setup.go
@@ -0,0 +1,35 @@
+package config
+
+import (
+	"os"
+)
+
+const NoConfigFile string = "Don't read a config file - use defaults only"
+
+// Setup the DTail configuration.
+func Setup(args *Args, additionalArgs []string) {
+	initializer := configInitializer{
+		Common: newDefaultCommonConfig(),
+		Server: newDefaultServerConfig(),
+		Client: newDefaultClientConfig(),
+	}
+
+	if args.ConfigFile == "" {
+		// TODO: Search more paths for config file (e.g. in /etc and in ~/.config/...
+		args.ConfigFile = "./cfg/dtail.json"
+	}
+
+	if args.ConfigFile != NoConfigFile {
+		if _, err := os.Stat(args.ConfigFile); !os.IsNotExist(err) {
+			initializer.parseConfig(args.ConfigFile)
+		}
+	}
+
+	// Assign pointers to global variables, so that we can access the
+	// configuration from any place of the program.
+	Common = initializer.Common
+	Server = initializer.Server
+	Client = initializer.Client
+
+	args.transform(additionalArgs)
+}