[errors] Add verbose errors on execution failure.

Author: cipriancraciun

sources/lib/commands.go

@@ -350,7 +350,7 @@ func doHandleExecuteScriptletSsh (_library LibraryStore, _scriptlet *Scriptlet,
 		}
 
 	if _error := _sshCommand.Run (); _error != nil {
-		return false, errorw (0x881a60b5, _error)
+		return false, errorf (0x881a60b5, "failed to spawn `%s`  //  %v", _sshCommand.Path, _error)
 	}
 
 	return true, nil

sources/lib/execution.go

@@ -702,7 +702,7 @@ func executeScriptlet_0 (_scriptletLabel string, _command *exec.Cmd, _descriptor
 
 		if _error := syscall.Exec (_command.Path, _command.Args, _command.Env); _error != nil {
 			_closeDescriptors ()
-			return errorw (0x99b54af1, _error)
+			return errorf (0x99b54af1, "failed to exec `%s`  //  %v", _command.Path, _error)
 		} else {
 			panic (0xb6dfe17e)
 		}

sources/lib/premain.go

@@ -122,7 +122,7 @@ func PreMain () () {
 			_environment = append (_environment, "ZRUN_EXECUTABLE=" + _executable)
 
 			if _error := syscall.Exec (_bash, _arguments, _environment); _error != nil {
-				panic (abortError (errorw (0x8598d4c0, _error)))
+				panic (abortError (errorf (0x8598d4c0, "failed to exec `%s`  //  %v", _bash, _error)))
 			}
 			panic (0xf4813cc2)
 
@@ -429,7 +429,7 @@ func PreMain () () {
 			_delegateArguments := append ([]string {_delegateArgument0}, _delegateArguments ...)
 
 			if _error := syscall.Exec (_delegateExecutable, _delegateArguments, _delegateEnvironment); _error != nil {
-				panic (abortError (errorw (0x05bd220d, _error)))
+				panic (abortError (errorf (0x05bd220d, "failed to exec `%s`  //  %v", _delegateExecutable, _error)))
 			} else {
 				panic (0xe13aab5f)
 			}
@@ -560,7 +560,7 @@ func PreMainReExecute (_executable string) (*Error) {
 			_arguments,
 			PreMainContextGlobal.Environment,
 		)
-	return errorw (0x3d993836, _error)
+	return errorf (0x3d993836, "failed to exec `%s`  //  %v", _executable, _error)
 }
 
 

sources/lib/processes.go

@@ -38,7 +38,7 @@ func processExecuteAndPipe (_command *exec.Cmd, _inputsChannel <-chan string, _o
 	}
 
 	if _error := _command.Start (); _error != nil {
-		return -1, 0, 0, errorw (0x26e1988c, _error)
+		return -1, 0, 0, errorf (0x26e1988c, "failed to spawn `%s`  //  %v", _command.Path, _error)
 	}
 
 	_waiter := & sync.WaitGroup {}