linting: apply errcheck part1

cmd/tendermint/commands/init.go

@@ -33,7 +33,9 @@ func initFiles(cmd *cobra.Command, args []string) {
 				Power:  10,
 			}}
 
-			genDoc.SaveAs(genFile)
+			if err := genDoc.SaveAs(genFile); err != nil {
+				panic(err)
+			}
 		}
 
 		logger.Info("Initialized tendermint", "genesis", config.GenesisFile(), "priv_validator", config.PrivValidatorFile())

cmd/tendermint/commands/reset_priv_validator.go

@@ -44,6 +44,15 @@ func resetPrivValidator(cmd *cobra.Command, args []string) {
 	resetPrivValidatorFS(config.PrivValidatorFile(), logger)
 }
 
+// Exported so other CLI tools can use  it
+func ResetAll(dbDir, privValFile string, logger log.Logger) {
+	resetPrivValidatorLocal(privValFile, logger)
+	if err := os.RemoveAll(dbDir); err != nil {
+		panic(err)
+	}
+	logger.Info("Removed all data", "dir", dbDir)
+}
+
 func resetPrivValidatorFS(privValFile string, logger log.Logger) {
 	// Get PrivValidator
 	if _, err := os.Stat(privValFile); err == nil {

cmd/tendermint/commands/root_test.go

@@ -26,8 +26,12 @@ const (
 // modify in the test cases.
 // NOTE: it unsets all TM* env variables.
 func isolate(cmds ...*cobra.Command) cli.Executable {
-	os.Unsetenv("TMHOME")
-	os.Unsetenv("TM_HOME")
+	if err := os.Unsetenv("TMHOME"); err != nil {
+		panic(err)
+	}
+	if err := os.Unsetenv("TM_HOME"); err != nil {
+		panic(err)
+	}
 
 	viper.Reset()
 	config = cfg.DefaultConfig()

cmd/tendermint/commands/testnet.go

@@ -63,7 +63,9 @@ func testnetFiles(cmd *cobra.Command, args []string) {
 	// Write genesis file.
 	for i := 0; i < nValidators; i++ {
 		mach := cmn.Fmt("mach%d", i)
-		genDoc.SaveAs(path.Join(dataDir, mach, "genesis.json"))
+		if err := genDoc.SaveAs(path.Join(dataDir, mach, "genesis.json")); err != nil {
+			panic(err)
+		}
 	}
 
 	fmt.Println(cmn.Fmt("Successfully initialized %v node directories", nValidators))

cmd/tendermint/main.go

@@ -37,5 +37,7 @@ func main() {
 	rootCmd.AddCommand(cmd.NewRunNodeCmd(nodeFunc))
 
 	cmd := cli.PrepareBaseCmd(rootCmd, "TM", os.ExpandEnv("$HOME/.tendermint"))
-	cmd.Execute()
+	if err := cmd.Execute(); err != nil {
+		panic(err)
+	}
 }