1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
|
package cli
import (
"context"
"database/sql"
"errors"
"fmt"
"log/slog"
"math"
"os"
"sort"
"text/tabwriter"
"time"
"github.com/martinlehoux/biking_home/config"
"github.com/martinlehoux/biking_home/mountain_pass"
"github.com/martinlehoux/biking_home/ride"
"github.com/martinlehoux/biking_home/web"
"github.com/martinlehoux/kagamigo/kcore"
"github.com/schollz/progressbar/v3"
)
func Run(db *sql.DB, configPath string, appConfig config.Config, args []string, enablePprof bool) {
if len(args) == 0 {
runServer(db, configPath, appConfig, enablePprof)
return
}
switch args[0] {
case "fetch-osm":
err := mountain_pass.FetchFrancePBF("france-latest.osm.pbf")
kcore.Expect(err, "failed to download France OSM PBF")
case "extract-osm":
if len(args) < 2 {
fmt.Fprintln(os.Stderr, "extract-osm requires a PBF file path argument")
printUsage()
os.Exit(2)
}
pbfPath := args[1]
enabled := progressBarEnabled()
var bar *progressbar.ProgressBar
_, err := mountain_pass.ExtractMountainPasses(context.Background(), pbfPath, db, func(current, total int64) {
if bar == nil && enabled {
bar = progressbar.DefaultBytes(total, "Extracting mountain passes")
}
if bar != nil {
bar.Set64(current)
}
})
if bar != nil {
bar.Finish()
}
kcore.Expect(err, "failed to extract mountain passes from OSM")
case "backfill":
enabled := progressBarEnabled()
var bar *progressbar.ProgressBar
count, err := ride.Backfill(db, func(current, total int) {
if bar == nil && enabled {
bar = progressbar.Default(int64(total), "Backfilling ride values")
}
if bar != nil {
bar.Set(current)
}
})
if bar != nil {
bar.Finish()
}
kcore.Expect(err, "failed to backfill ride values")
slog.Info("Backfilled ride values", "rides", count)
case "backtest":
kcore.Expect(runBacktest(db), "failed to run backtest")
case "serve":
pprof := enablePprof
for _, arg := range args[1:] {
if arg == "--pprof" || arg == "-pprof" || arg == "pprof" {
pprof = true
}
}
runServer(db, configPath, appConfig, pprof)
case "help", "-h", "--help":
printUsage()
default:
fmt.Fprintf(os.Stderr, "unknown command %q\n", args[0])
printUsage()
os.Exit(2)
}
}
func printUsage() {
fmt.Fprintf(os.Stderr, `Usage: biking_home [global flags] <command> [args]
Global flags:
-config <path> path to YAML configuration file (default "config.yaml")
-pprof expose pprof endpoints at /debug/pprof (also: "serve --pprof")
Commands:
serve start web server (default when no command given)
fetch-osm download the France OSM PBF into france-latest.osm.pbf
extract-osm <path> extract mountain passes from an OSM PBF file
backfill recompute all stored ride values
backtest run data benchmarks comparing computed values against stored reference values
`)
}
// progressBarEnabled reports whether stderr is attached to a terminal, so the
// progress bar only renders for interactive runs and stays out of piped or
// redirected output.
func progressBarEnabled() bool {
fi, err := os.Stderr.Stat()
return err == nil && fi.Mode()&os.ModeCharDevice != 0
}
func runServer(db *sql.DB, configPath string, appConfig config.Config, enablePprof bool) {
server := web.NewServer(db, configPath).WithPprof(enablePprof)
if enablePprof {
slog.Info("pprof enabled", "endpoint", appConfig.Server.PublicURL+"/debug/pprof/")
}
slog.Info("Starting web server", "address", appConfig.Server.PublicURL)
kcore.Expect(server.ListenAndServe(appConfig.Server.Address), "web server stopped")
}
type backtestSample struct {
externalID string
name string
computed time.Duration
reference time.Duration
relErrorPct float64
}
func runBacktest(db *sql.DB) error {
items, err := ride.List(db)
if err != nil {
return err
}
var samples []backtestSample
var bar *progressbar.ProgressBar
if progressBarEnabled() {
bar = progressbar.Default(int64(len(items)), "Backtesting rides")
defer bar.Finish()
}
for _, item := range items {
if bar != nil {
bar.Add(1)
}
if !isBacktestEligible(item) {
continue
}
parsed, err := ride.ParseFile(ride.FITRideParser{}, item.FitPath)
if err != nil {
if errors.Is(err, ride.ErrNoTrackPoints) {
continue
}
slog.Warn("Failed to parse ride FIT", "ride", item.ExternalID, "file", item.FitPath, "error", err)
continue
}
reference := time.Duration(item.ExternalMovingTimeS) * time.Second
computed := ride.MovingTime(parsed)
samples = append(samples, backtestSample{
externalID: item.ExternalID,
name: item.Name,
computed: computed,
reference: reference,
relErrorPct: (float64(computed) - float64(reference)) / float64(reference) * 100,
})
}
if len(samples) == 0 {
slog.Info("No rides with FIT to backtest", "rides", len(items))
return nil
}
sort.Slice(samples, func(i, j int) bool {
return math.Abs(samples[i].relErrorPct) > math.Abs(samples[j].relErrorPct)
})
w := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)
fmt.Fprintln(w, "computed\treference\terr %\tride")
limit := min(len(samples), 10)
for _, s := range samples[:limit] {
fmt.Fprintf(w, "%s\t%s\t%+.1f\t%s (%s)\n", s.computed.Round(time.Second), s.reference.Round(time.Second), s.relErrorPct, s.name, s.externalID)
}
w.Flush()
absErrors := make([]float64, 0, len(samples))
for _, s := range samples {
absErrors = append(absErrors, math.Abs(s.relErrorPct))
}
percentiles := []float64{50, 75, 90, 95, 99}
distribution := errorDistribution(absErrors, percentiles)
table := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)
fmt.Fprintln(table, "percentile\tabs err %")
for _, p := range percentiles {
fmt.Fprintf(table, "p%g\t%.1f\n", p, distribution[p])
}
table.Flush()
slog.Info("Moving time backtest", "rides", len(samples), "mean_err_pct", math.Round(meanAbsErr(absErrors)*10)/10, "stderr_pct", math.Round(stdErrAbsErr(absErrors)*10)/10)
return nil
}
func isBacktestEligible(item ride.StoredRide) bool {
if item.FitPath == "" || item.ExternalMovingTimeS <= 0 || item.ElapsedTimeS <= 0 {
return false
}
if !item.IsCategorised() {
return false
}
if item.RideType == ride.RideTypeIndoor || item.RideType == ride.RideTypeTransport {
return false
}
return true
}
func meanAbsErr(absErrors []float64) float64 {
var sum float64
for _, err := range absErrors {
sum += err
}
return sum / float64(len(absErrors))
}
func stdErrAbsErr(absErrors []float64) float64 {
mean := meanAbsErr(absErrors)
var sumSquares float64
for _, err := range absErrors {
sumSquares += (err - mean) * (err - mean)
}
variance := sumSquares / float64(len(absErrors)-1)
return math.Sqrt(variance / float64(len(absErrors)))
}
func errorDistribution(absErrors []float64, percentiles []float64) map[float64]float64 {
sorted := append([]float64(nil), absErrors...)
sort.Float64s(sorted)
distribution := map[float64]float64{}
for _, p := range percentiles {
index := max(int(math.Ceil(p/100*float64(len(sorted)))-1), 0)
if index >= len(sorted) {
index = len(sorted) - 1
}
distribution[p] = sorted[index]
}
return distribution
}
|
