Ensure that reading from symlink config files works

Author: zph

Diff for: .polylint

@@ -0,0 +1 @@
+examples/simple.yaml

Diff for: TODO.md

@@ -38,3 +38,4 @@
   - [ ] Colored output
   - [ ] JSON reporter
 - [ ] Configurable logging (log levels for debugging and k/v log values)
+- [ ] Add `init` command to create a default named config file

Diff for: cmd/root.go

@@ -61,6 +61,7 @@ func initConfig() {
 		cobra.CheckErr(err)
 
 		// Search config in home directory with name ".polylint" (without extension).
+		viper.AddConfigPath(".")
 		viper.AddConfigPath(home)
 		viper.SetConfigType("yaml")
 		viper.SetConfigName(".polylint")

Diff for: cmd/run.go

@@ -10,6 +10,7 @@ import (
 	"path/filepath"
 
 	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
 	pl "github.com/zph/polylint/pkg"
 )
 
@@ -32,7 +33,13 @@ func Run(cmd *cobra.Command, args []string) (int, []error) {
 	exitCode = 0
 	var errs []error
 	for _, root := range args {
-		configRaw, err := os.ReadFile(cfgFile)
+		// Resolve symlinks
+		s, err := os.Readlink(viper.ConfigFileUsed())
+		if err == nil {
+			cfgFile = s
+		}
+		configRaw, err := os.ReadFile(viper.ConfigFileUsed())
+
 		if err != nil {
 			panic(err)
 		}
@@ -90,7 +97,6 @@ func RunCmd(cmd *cobra.Command, args []string) {
 	exitCode, errs := Run(cmd, args)
 	if len(errs) > 0 {
 		fmt.Printf("Errors: %+v", errs)
-		panic(errs)
 	}
 	os.Exit(exitCode)
 }