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// Copyright 2021 Google Inc. All Rights Reserved.
// This file is available under the Apache license.
package runtime
import (
"time"
"github.com/jaqx0r/mtail/internal/runtime/compiler"
"github.com/jaqx0r/mtail/internal/runtime/vm"
"github.com/prometheus/client_golang/prometheus"
)
// Option configures a new program Runtime.
type Option func(*Runtime) error
// OverrideLocation sets the timezone location for the VM.
func OverrideLocation(loc *time.Location) Option {
return func(r *Runtime) error {
r.overrideLocation = loc
return nil
}
}
// CompileOnly sets the Runtime to compile programs only, without executing them.
func CompileOnly() Option {
return func(r *Runtime) error {
r.compileOnly = true
return ErrorsAbort()(r)
}
}
// ErrorsAbort sets the Runtime to abort the Runtime on compile errors.
func ErrorsAbort() Option {
return func(r *Runtime) error {
r.errorsAbort = true
return nil
}
}
// DumpAst emits the AST after program compilation.
func DumpAst() Option {
return func(r *Runtime) error {
r.cOpts = append(r.cOpts, compiler.EmitAst())
return nil
}
}
// DumpAstTypes emits the AST after type checking.
func DumpAstTypes() Option {
return func(r *Runtime) error {
r.cOpts = append(r.cOpts, compiler.EmitAstTypes())
return nil
}
}
// DumpBytecode instructs the loader to print the compiled bytecode after code generation.
func DumpBytecode() Option {
return func(r *Runtime) error {
r.dumpBytecode = true
return nil
}
}
// SyslogUseCurrentYear instructs the VM to annotate yearless timestamps with the current year.
func SyslogUseCurrentYear() Option {
return func(r *Runtime) error {
r.syslogUseCurrentYear = true
return nil
}
}
// MaxRegexpLength sets the maximum length an mtail regular expression can have, in terms of characters.
func MaxRegexpLength(maxRegexpLength int) Option {
return func(r *Runtime) error {
r.cOpts = append(r.cOpts, compiler.MaxRegexpLength(maxRegexpLength))
return nil
}
}
// MaxRecursionDepth sets the maximum depth the abstract syntax tree built during lexation can have.
func MaxRecursionDepth(maxRecursionDepth int) Option {
return func(r *Runtime) error {
r.cOpts = append(r.cOpts, compiler.MaxRecursionDepth(maxRecursionDepth))
return nil
}
}
// OmitMetricSource instructs the Runtime to not annotate metrics with their program source when added to the metric store.
func OmitMetricSource() Option {
return func(r *Runtime) error {
r.omitMetricSource = true
return nil
}
}
// PrometheusRegisterer passes in a registry for setting up exported metrics.
func PrometheusRegisterer(reg prometheus.Registerer) Option {
return func(r *Runtime) error {
r.reg = reg
r.reg.MustRegister(vm.LineProcessingDurations)
return nil
}
}
// LogRuntimeErrors instructs the VM to emit runtime errors into the log.
func LogRuntimeErrors() Option {
return func(r *Runtime) error {
r.logRuntimeErrors = true
return nil
}
}
func TraceExecution() Option {
return func(r *Runtime) error {
r.trace = true
return nil
}
}
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