fewer panics

pkg/app/app.go

@@ -67,7 +67,7 @@ func newDevelopmentLogger() *logrus.Logger {
 	}
 	file, err := os.OpenFile(logPath, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
 	if err != nil {
-		panic("unable to log to file") // TODO: don't panic (also, remove this call to the `panic` function)
+		log.Fatalf("Unable to log to log file: %v", err)
 	}
 	logger.SetOutput(file)
 	return logger

pkg/gui/lbl/focus.go

@@ -47,6 +47,7 @@ func getNeedAndWantLineIdx(firstLineIdx int, lastLineIdx int, selectedLineIdx in
 	case HUNK:
 		return firstLineIdx, lastLineIdx
 	default:
+		// we should never land here
 		panic("unknown mode")
 	}
 }

pkg/integration/integration.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io/ioutil"
+	"log"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -210,7 +211,7 @@ func GetRootDirectory() string {
 		path = filepath.Dir(path)
 
 		if path == "/" {
-			panic("must run in lazygit folder or child folder")
+			log.Fatal("must run in lazygit folder or child folder")
 		}
 	}
 }