mirror of
https://github.com/Luzifer/go-latestver.git
synced 2024-11-09 23:50:05 +00:00
68 lines
1.3 KiB
Go
68 lines
1.3 KiB
Go
package version
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import (
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"math"
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"strconv"
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"strings"
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"github.com/pkg/errors"
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)
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type (
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numericDotSeparatedComparer struct{}
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)
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var _ comparer = numericDotSeparatedComparer{}
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func (n numericDotSeparatedComparer) Compare(oldVersion, newVersion string) (compareResult, error) {
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oldV, err := n.parse(oldVersion)
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if err != nil {
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return compareResultInvalid, errors.Wrap(err, "parsing old version")
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}
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newV, err := n.parse(newVersion)
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if err != nil {
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return compareResultInvalid, errors.Wrap(err, "parsing old version")
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}
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getSeg := func(v []int, i int) int {
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if i >= len(v) {
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return 0
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}
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return v[i]
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}
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for i := 0; i < int(math.Max(float64(len(oldV)), float64(len(newV)))); i++ {
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switch {
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case getSeg(oldV, i) < getSeg(newV, i):
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return compareResultUpgrade, nil
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case getSeg(oldV, i) > getSeg(newV, i):
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return compareResultDowngrade, nil
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default:
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continue
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}
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}
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return compareResultEqual, nil
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}
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func (numericDotSeparatedComparer) IsPrerelease(string) (bool, error) {
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// Numeric Dot has no marker for Pre-Releases
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return false, nil
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}
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func (numericDotSeparatedComparer) parse(ver string) ([]int, error) {
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var out []int
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for _, seg := range strings.Split(ver, ".") {
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segI, err := strconv.Atoi(seg)
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if err != nil {
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return nil, errors.Wrap(err, "parsing segment")
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}
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out = append(out, segI)
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}
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return out, nil
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}
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