/*
'actual' should be an `*errors.Error`; 'expected' should be an `*errors.ErrorClass`;
we'll check that the error is under the umbrella of the error class.
*/
func ShouldBeErrorClass(actual interface{}, expected ...interface{}) string {
err, ok := actual.(error)
if !ok {
return fmt.Sprintf("You must provide an `error` as the first argument to this assertion; got `%T`", actual)
}
var class *errors.ErrorClass
switch len(expected) {
case 0:
return "You must provide a spacemonkey `ErrorClass` as the expectation parameter to this assertion."
case 1:
cls, ok := expected[0].(*errors.ErrorClass)
if !ok {
return "You must provide a spacemonkey `ErrorClass` as the expectation parameter to this assertion."
}
class = cls
default:
return "You must provide one parameter as an expectation to this assertion."
}
// checking if this is nil is surprisingly complicated due to https://golang.org/doc/faq#nil_error
if reflect.ValueOf(err).IsNil() {
return fmt.Sprintf("Expected error to be of class %q but it was nil!", class.String())
}
spaceClass := errors.GetClass(err)
if spaceClass.Is(class) {
return ""
}
return fmt.Sprintf("Expected error to be of class %q but it had %q instead! (Full message: %s)", class.String(), spaceClass.String(), err.Error())
}
/*
'actual' should be a `func()`; 'expected' should be an `*errors.ErrorClass`;
we'll run the function, and check that it panics, and that the error is under the umbrella of the error class.
*/
func ShouldPanicWith(actual interface{}, expected ...interface{}) string {
fn, ok := actual.(func())
if !ok {
return fmt.Sprintf("You must provide a `func()` as the first argument to this assertion; got `%T`", actual)
}
var errClass *errors.ErrorClass
switch len(expected) {
case 0:
return "You must provide a spacemonkey `ErrorClass` as the expectation parameter to this assertion."
case 1:
cls, ok := expected[0].(*errors.ErrorClass)
if !ok {
return "You must provide a spacemonkey `ErrorClass` as the expectation parameter to this assertion."
}
errClass = cls
default:
return "You must provide one parameter as an expectation to this assertion."
}
var caught error
try.Do(
fn,
).CatchAll(func(err error) {
caught = err
}).Done()
if caught == nil {
return fmt.Sprintf("Expected error to be of class %q but no error was raised!", errClass.String())
}
spaceClass := errors.GetClass(caught)
if spaceClass.Is(errClass) {
return ""
}
return fmt.Sprintf("Expected error to be of class %q but it had %q instead! (Full message: %s)", errClass.String(), spaceClass.String(), caught.Error())
}
EXIT_JOB = ExitCode(10) // used to indicate a job reported a nonzero exit code (from cli commands that execute a single job).
)
var ExitCodeKey = errors.GenSym()
/*
CLI errors are the last line: they should be formatted to be user-facing.
The main method will convert a CLIError into a short and well-formatted
message, and will *not* include stack traces unless the user is running
with debug mode enabled.
CLI errors are an appropriate wrapping for anything where we can map a
problem onto something the user can understand and fix. Errors that are
a repeatr bug or unknown territory should *not* be mapped into a CLIError.
*/
var Error *errors.ErrorClass = errors.NewClass("CLIError")
/*
Use this to set a specific error code the process should exit with
when producing a `cli.Error`.
Example: `cli.Error.NewWith("something terrible!", SetExitCode(EXIT_BADARGS))`
*/
func SetExitCode(code ExitCode) errors.ErrorOption {
return errors.SetData(ExitCodeKey, code)
}
/*
Exit errors may be raised to immediately transition to we're done (and
specify an `ExitCode`), but generate slightly less of a sadface than
`cli.Error`: use them for graceful exits.
package scheduler
import (
"github.com/spacemonkeygo/errors"
)
// grouping, do not instantiate
var Error *errors.ErrorClass = errors.NewClass("SchedulerError")
// error when a scheduler's queue was full and could not enqueue a forumla.
var QueueFullError *errors.ErrorClass = Error.NewClass("QueueFullError")
}
/*
RecordIterator is used for walking Bucket contents in hash-ready order.
It's specified separately from Record for three reasons: There will be many
Record objects, and so they should be small (the iterators tend to require
at least another two words of memory); and the Record objects are
serializable the same way for all implementations of Bucket (the iterators
may work differently depending on how data is heaped in the Bucket impl).
*/
type RecordIterator interface {
treewalk.Node
Record() Record
}
var InvalidFilesystem *errors.ErrorClass = errors.NewClass("InvalidFilesystem")
/*
PathCollision is reported when the same file path is submitted to a `Bucket`
more than once. (Some formats, for example tarballs, allow the same filename
to be recorded twice. We consider this poor behavior since most actual
filesystems of course will not tolerate this, and also because it begs the
question of which should be sorted first when creating a deterministic
hash of the whole tree.)
*/
var PathCollision *errors.ErrorClass = InvalidFilesystem.NewClass("PathCollision")
/*
MissingTree is reported when iteration over a filled bucket encounters
a file that has no parent nodes. I.e., if there's a file path "./a/b",
and there's no entries for "./a", it's a MissingTree error.
package executor
import (
"github.com/spacemonkeygo/errors"
)
// grouping, do not instantiate
var Error *errors.ErrorClass = errors.NewClass("ExecutorError")
/*
Error raised when an executor cannot operate due to invalid setup.
*/
var ConfigError *errors.ErrorClass = Error.NewClass("ExecutorConfigError")
/*
Error raised when there are serious issues with task launch.
Occurance of TaskExecError may be due to OS-imposed resource limits
or other unexpected problems. They should not be seen in normal,
healthy operation.
*/
var TaskExecError *errors.ErrorClass = Error.NewClass("ExecutorTaskExecError")
/*
Error raised when a command is not found inside the execution environment.
Often just indicative of user misconfiguration (and thus this is not a
child of TaskExecError, which expresses serious system failures).
*/
var NoSuchCommandError *errors.ErrorClass = Error.NewClass("NoSuchCommandError")
- DataDNE (not necessarily a panic-worthy offense)
- HashMismatchError (this is somewhere between extremely rudely failing component and outright malice)
- MoorError (from either materialize or scan: ran out of space, didn't have perms, something)
All of these are errors that can be raised from using transmats.
(They're not all grouped under TransmatError because they're not all
the transmat's fault, per se; fixing them requires looking afield.)
Additionally, these other systems may fail, but are rare, internal, and serious:
- Error
- PlacerError
// actually that's it... assemblers, to date, don't represent enough
// code to have their own interesting failure modes.
*/
var Error *errors.ErrorClass = errors.NewClass("IntegrityError") // grouping, do not instantiate // n.b. the ambiguity and alarmingness of this error name is the clearest example of why this package needs rethinking on the name.
/*
Raised to indicate that some configuration is missing or malformed.
*/
var ConfigError *errors.ErrorClass = Error.NewClass("ConfigError")
/*
Raised to indicate a serious internal error with a transmat's functioning.
Typically these indicate a need for the whole program to stop; examples are
the repeatr daemon hitting permissions problems in the main work area,
or running out of disk space, or something equally severe.
Errors relating to the either the warehouse, the data integrity checks,
or the operational theater on the local filesystem are all different
package fs
import (
"github.com/spacemonkeygo/errors"
)
var Error *errors.ErrorClass = errors.NewClass("FSError") // grouping, do not instantiate
/*
`BreakoutError` is raised when processing a filesystem description where links
(symlinks, hardlinks) are constructed in such a way that they would reach
out of the base directory. Encountering these in a well-formed filesystem
description is basically an attempted attack.
*/
var BreakoutError *errors.ErrorClass = Error.NewClass("FSBreakoutError")
func ioError(err error) {
panic(Error.Wrap(errors.IOError.Wrap(err)))
}