/
parser.go
77 lines (63 loc) · 1.37 KB
/
parser.go
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package exporter
import (
"bufio"
"errors"
"strings"
"github.com/Masterminds/semver"
)
const (
keyValueSeparator = ":"
doubleQuotationMark = "\""
pikaVersionKey = "pika_version"
)
func parseInfo(info string) (*semver.Version, map[string]string, error) {
extracts, err := extractInfo(info)
if err != nil {
return nil, nil, err
}
version, err := semver.NewVersion(getVersion(extracts))
if err != nil {
return nil, nil, errors.New("invalid version in info")
}
return version, extracts, nil
}
func extractInfo(s string) (map[string]string, error) {
m := make(map[string]string)
scanner := bufio.NewScanner(strings.NewReader(s))
for scanner.Scan() {
line := scanner.Text()
cleanLine := trimSpace(line)
if cleanLine == "" {
continue
}
k, v := fetchKV(cleanLine)
m[k] = v
}
if err := scanner.Err(); err != nil {
return nil, err
}
return m, scanner.Err()
}
func trimSpace(s string) string {
s = strings.TrimLeft(s, " ")
s = strings.TrimRight(s, " ")
return s
}
func fetchKV(s string) (k, v string) {
pos := strings.Index(s, keyValueSeparator)
if pos < 0 {
k = s
return
}
k = trimSpace(s[:pos])
v = trimSpace(s[pos+1:])
return
}
func getVersion(extracted map[string]string) (version string) {
version, _ = extracted[pikaVersionKey]
vv := strings.Split(version, ".")
if len(vv) > 3 {
version = strings.Join(vv[:3], ".")
}
return
}