func (ss *stepsource_cmd) Start(src <-chan t.Ticks, prod chan<- t.TicksSteps) {
cmdin := make(chan []string)
cmdout := make(chan string)
go ss.cmd.Start(cmdin, cmdout)
if ss.sourcetype&t.SRC_O != 0 {
// the main loop below skips zero step increases.
// however we must guarantee at least one step event is issued
// as origin.
tval := <-src
args := make([]string, 1)
args[0] = fmt.Sprint(tval)
cmdin <- args
sval := t.Steps(0)
if ss.sourcetype&t.SRC_Z != 0 {
// we produce zero as origin in this case
<-cmdout
} else {
sval_str := <-cmdout
v, err := strconv.ParseFloat(sval_str, 64)
Assert(err == nil, "parsing steps", ":", err)
sval = t.Steps(v)
}
prod <- t.TicksSteps{Ticks: tval, Steps: sval}
} else {
if ss.sourcetype&t.SRC_Z != 0 {
// we produce zero as origin in this case
prod <- t.TicksSteps{Ticks: <-src, Steps: 0}
}
}
var lastval t.Steps
for tval := range src {
args := make([]string, 1)
args[0] = fmt.Sprint(tval)
cmdin <- args
output := <-cmdout
v, err := strconv.ParseFloat(output, 64)
Assert(err == nil, "parsing steps", ":", err)
sval := t.Steps(v)
if ss.sourcetype&t.SRC_M != 0 {
tmp := sval - lastval
lastval = sval
sval = tmp
}
if sval > 0 {
prod <- t.TicksSteps{Ticks: tval, Steps: sval}
}
}
}
func (qs *qstate) make_status(supply t.StuffSteps) t.Status {
qs.ticks += qs.dticks
qs.steps += qs.dsteps
st := t.Status{
Ticks: qs.ticks,
TicksDelta: qs.dticks,
Steps: qs.steps,
StepsDelta: qs.dsteps,
Supply: supply,
Delta: supply - qs.psupply,
}
qs.psupply = supply
qs.dticks = t.Ticks(0)
qs.dsteps = t.Steps(0)
return st
}
func main() {
ifname := getopt.StringLong("input", 'i', "-", "Set input stream for supplies (default '-', stdin)", "FILE")
ofname := getopt.StringLong("output", 'o', "-", "Set output stream for reports (default '-', stdout)", "FILE")
tspec := getopt.StringLong("ticks", 't', "", "Set tick generator (produces tick events)", "SPEC")
sspec := getopt.StringLong("steps", 's', "", "Set progress indicator (measures steps)", "SPEC")
mspec := getopt.StringLong("monitor", 'm', "", "Set resource monitor (measures stuff)", "SPEC")
aspec := getopt.StringLong("actuator", 'a', "", "Set actuator (triggered upon supply exhaustion)", "SPEC")
gran := getopt.StringLong("granularity", 'g', "0", "Force tick granularity (default 0, disabled)", "N")
thr := getopt.StringLong("periodic-output", 'p', "none", "Configure periodic output (default none)", "PER")
help := getopt.BoolLong("help", 'h', "Print this help")
ver := getopt.BoolLong("version", 0, "Report version number")
getopt.SetParameters("")
getopt.Parse()
/*** -h / -v ***/
if *help {
getopt.Usage()
fmt.Println("\nReport bugs to http://github.com/knz/reg/issues")
os.Exit(0)
}
if *ver {
fmt.Println("reg (REG-ulator)", version)
os.Exit(0)
}
/*** -i / -o ***/
var fin, fout *os.File
var err error
if *ifname == "-" {
fin = os.Stdin
} else {
fin, err = os.Open(*ifname)
Assert(err == nil, "-i :", err)
}
if *ofname == "-" {
fout = os.Stdout
} else {
fout, err = os.OpenFile(*ofname, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0666)
Assert(err == nil, "-o :", err)
}
/*** -g ***/
g, err := strconv.ParseFloat(*gran, 64)
Assert(err == nil, "-g :", err)
Assert(g >= 0, "-g : granularity cannot be negative")
/*** -p ***/
throttle_type := reg.OUTPUT_EXPLICIT_ONLY
throttle_period := float64(0)
spec_type, spec_flags, spec_arg := split(*thr)
switch spec_type {
case "none":
Assert(spec_flags == "" && spec_arg == "", "-p none does not accept flags/argument")
throttle_type = reg.OUTPUT_EXPLICIT_ONLY
case "flood":
Assert(spec_flags == "" && spec_arg == "", "-p flood does not accept flags/argument")
throttle_type = reg.OUTPUT_FLOOD
case "ticks":
throttle_type = reg.OUTPUT_THROTTLE_TICKS
if spec_arg != "" {
throttle_period, err = strconv.ParseFloat(spec_arg, 64)
Assert(err == nil, "-p ticks :", err)
}
Assert(spec_flags == "", "-p ticks does not accept flags")
case "steps":
throttle_type = reg.OUTPUT_THROTTLE_STEPS
if spec_arg != "" {
throttle_period, err = strconv.ParseFloat(spec_arg, 64)
Assert(err == nil, "-p steps :", err)
}
Assert(spec_flags == "", "-p steps does not accept flags")
default:
Assert(false, "invalid syntax for -p")
}
Assert(throttle_period >= 0, "-p : period cannot be negative")
/*** -a ***/
var a act.Actuator
spec_type, spec_flags, spec_arg = split(*aspec)
Assert(spec_flags == "", "-a does not accept flags")
switch spec_type {
case "discard":
Assert(spec_arg == "", "-a discard does not accept argument")
a = act.MakeDummyActuator()
case "print":
var af *os.File
if spec_arg == "-" || spec_arg == "" {
af = os.Stdout
} else {
af, err = os.OpenFile(spec_arg, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0666)
Assert(err == nil, "-a :", err)
}
a = act.MakePrinterActuator(af)
case "proc":
a = act.MakeCommandActuator(cmd.MakeInteractiveCommand(spec_arg))
case "cmd":
a = act.MakeCommandActuator(cmd.MakeOneShotCommand(spec_arg))
default:
Assert(false, "invalid -a, or -a not specified")
}
/*** -t ***/
var ts ticks.Source
spec_type, spec_flags, spec_arg = split(*tspec)
switch spec_type {
case "instant":
Assert(spec_flags == "", "-t instant does not accept flags")
v := float64(0)
if spec_arg != "" {
v, err = strconv.ParseFloat(spec_arg, 64)
Assert(err == nil, "-t instant:", err)
}
ts = ticks.MakeDummySource(t.Ticks(v))
case "time", "ptime", "cmd", "proc":
stype, ok := flagconv(spec_flags)
Assert(ok, "invalid flags for -t")
switch spec_type {
case "time", "ptime":
d, err := time.ParseDuration(spec_arg)
Assert(err == nil, "-t :", err)
ts = ticks.MakeTimerSource(d, stype, spec_type == "ptype")
case "cmd":
ts = ticks.MakeCommandSource(cmd.MakeOneShotCommand(spec_arg), stype)
case "proc":
ts = ticks.MakeCommandSource(cmd.MakeInteractiveCommand(spec_arg), stype)
}
default:
Assert(false, "invalid -t, or -t not specified")
}
/*** -s ***/
var ss steps.Source
spec_type, spec_flags, spec_arg = split(*sspec)
switch spec_type {
case "const":
Assert(spec_flags == "", "-s dummy does not accept flags")
v := float64(0)
if spec_arg != "" {
v, err = strconv.ParseFloat(spec_arg, 64)
Assert(err == nil, "-s const:", err)
Assert(v >= 0, "-s const: constant cannot be negative")
}
ss = steps.MakeDummySource(t.Steps(v))
case "cmd", "proc":
stype, ok := flagconv(spec_flags)
Assert(ok, "invalid flags for -s")
switch spec_type {
case "cmd":
ss = steps.MakeCommandSource(cmd.MakeOneShotCommand(spec_arg), stype)
case "proc":
ss = steps.MakeCommandSource(cmd.MakeInteractiveCommand(spec_arg), stype)
}
default:
Assert(false, "invalid -s, or -s not specified")
}
/*** -m ***/
var m sample.Sampler
spec_type, spec_flags, spec_arg = split(*mspec)
switch spec_type {
case "const":
Assert(spec_flags == "", "-m const does not accept flags")
v := float64(0)
if spec_arg != "" {
v, err = strconv.ParseFloat(spec_arg, 64)
Assert(err == nil, "-m const:", err)
}
m = sample.MakeDummySampler(t.Stuff(v))
case "cmd", "proc":
Assert(spec_flags == "", "-m cmd/proc does not accept flags")
switch spec_type {
case "cmd":
m = sample.MakeCommandSampler(cmd.MakeOneShotCommand(spec_arg))
case "proc":
m = sample.MakeCommandSampler(cmd.MakeInteractiveCommand(spec_arg))
}
default:
Assert(false, "invalid -m, or -m not specified")
}
d := reg.MakeDomain(ts, ss, a, m)
d.Start(fin, fout, throttle_type, throttle_period, t.Ticks(g))
d.Wait()
}