/
processfile.go
68 lines (56 loc) · 1.31 KB
/
processfile.go
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package main
import (
"encoding/csv"
"fmt"
"io"
"text/template"
)
const (
TEMPLATE = `// Auto-generated by csv2map Do Not Edit
package {{.Package}}
var {{.Name}} = map[string]string { {{range .Entries}}
"{{.Key}}": "{{.Value}}",{{end}}
}
`
)
var (
mapTemplate = template.Must(template.New("map").Parse(TEMPLATE))
)
type MapEntry struct {
Key string
Value string
}
type mapTemplateData struct {
Package string
Name string
Entries []MapEntry
}
func processFile(reader *csv.Reader, keyIndex, valueIndex int, headerRow bool) ([]MapEntry, error) {
entries := []MapEntry{}
for i := 0; true; i++ {
row, err := reader.Read()
if err == io.EOF {
break
}
if err != nil {
return nil, err
}
if headerRow && i == 0 {
continue
}
numFields := len(row)
if keyIndex > numFields {
return nil, fmt.Errorf("key index '%d' > number of fields '%d'", keyIndex, numFields)
}
if valueIndex > numFields {
return nil, fmt.Errorf("value index '%d' > number of fields '%d'", valueIndex, numFields)
}
key := row[keyIndex-1]
value := row[valueIndex-1]
entries = append(entries, MapEntry{key, value})
}
return entries, nil
}
func render(w io.Writer, packageName string, mapName string, entries []MapEntry) error {
return mapTemplate.Execute(w, mapTemplateData{packageName, mapName, entries})
}