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|
package main
import (
"encoding/xml"
"flag"
"fmt"
"io/ioutil"
"os"
"text/template"
)
var usage = `%[1]s generates Go code to support CLDR plural rules.
Usage: %[1]s [options]
Options:
`
func main() {
flag.Usage = func() {
fmt.Fprintf(os.Stderr, usage, os.Args[0])
flag.PrintDefaults()
}
var in, cout, tout string
flag.StringVar(&in, "i", "plurals.xml", "the input XML file containing CLDR plural rules")
flag.StringVar(&cout, "cout", "", "the code output file")
flag.StringVar(&tout, "tout", "", "the test output file")
flag.BoolVar(&verbose, "v", false, "verbose output")
flag.Parse()
buf, err := ioutil.ReadFile(in)
if err != nil {
fatalf("failed to read file: %s", err)
}
var data SupplementalData
if err := xml.Unmarshal(buf, &data); err != nil {
fatalf("failed to unmarshal xml: %s", err)
}
count := 0
for _, pg := range data.PluralGroups {
count += len(pg.SplitLocales())
}
infof("parsed %d locales", count)
if cout != "" {
file := openWritableFile(cout)
if err := codeTemplate.Execute(file, data); err != nil {
fatalf("unable to execute code template because %s", err)
} else {
infof("generated %s", cout)
}
} else {
infof("not generating code file (use -cout)")
}
if tout != "" {
file := openWritableFile(tout)
if err := testTemplate.Execute(file, data); err != nil {
fatalf("unable to execute test template because %s", err)
} else {
infof("generated %s", tout)
}
} else {
infof("not generating test file (use -tout)")
}
}
func openWritableFile(name string) *os.File {
file, err := os.OpenFile(name, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
if err != nil {
fatalf("failed to write file %s because %s", name, err)
}
return file
}
var codeTemplate = template.Must(template.New("rule").Parse(`// This file is generated by i18n/plural/codegen/generate.sh; DO NOT EDIT
package plural
// DefaultRules returns a map of Rules generated from CLDR language data.
func DefaultRules() Rules {
rules := Rules{}
{{range .PluralGroups}}
addPluralRules(rules, {{printf "%#v" .SplitLocales}}, &Rule{
PluralForms: newPluralFormSet({{range $i, $e := .PluralRules}}{{if $i}}, {{end}}{{$e.CountTitle}}{{end}}),
PluralFormFunc: func(ops *Operands) Form { {{range .PluralRules}}{{if .GoCondition}}
// {{.Condition}}
if {{.GoCondition}} {
return {{.CountTitle}}
}{{end}}{{end}}
return Other
},
}){{end}}
return rules
}
`))
var testTemplate = template.Must(template.New("rule").Parse(`// This file is generated by i18n/plural/codegen/generate.sh; DO NOT EDIT
package plural
import "testing"
{{range .PluralGroups}}
func Test{{.Name}}(t *testing.T) {
var tests []pluralFormTest
{{range .PluralRules}}
{{if .IntegerExamples}}tests = appendIntegerTests(tests, {{.CountTitle}}, {{printf "%#v" .IntegerExamples}}){{end}}
{{if .DecimalExamples}}tests = appendDecimalTests(tests, {{.CountTitle}}, {{printf "%#v" .DecimalExamples}}){{end}}
{{end}}
locales := {{printf "%#v" .SplitLocales}}
for _, locale := range locales {
runTests(t, locale, tests)
}
}
{{end}}
`))
func infof(format string, args ...interface{}) {
fmt.Fprintf(os.Stderr, format+"\n", args...)
}
var verbose bool
func verbosef(format string, args ...interface{}) {
if verbose {
infof(format, args...)
}
}
func fatalf(format string, args ...interface{}) {
infof("fatal: "+format+"\n", args...)
os.Exit(1)
}
|
