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tagcmp
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feat: add Tag.UpgradeElement(newTag Tag) which returns a difference between two tags

This commit is contained in:
knoflook 2021-10-01 19:11:21 +02:00
parent 2a8edd82d7
commit aa81b0306c
Signed by: knoflook
GPG Key ID: D6A1D0E8FC4FEF1C
1 changed files with 18 additions and 0 deletions
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18
tagcmp.go
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@ -166,6 +166,24 @@ func (t Tag) IsCompatible(tag Tag) bool {
return true
}
// UpgradeElement returns a Tag object which is the difference between an old and new tag
// It can contain negative numbers if comparing with an older tag.
func (curTag Tag) UpgradeElement(newTag Tag) (Tag, error) {
if !curTag.IsCompatible(newTag) {
return Tag{}, fmt.Errorf("%s and %s are not compatible with each other", curTag.String(), newTag.String())
}
diff := curTag
diff.Major(strconv.Itoa(strconv.Atoi(newTag.Major) - strconv.Atoi(curTag.Major)))
if !curTag.MissingMinor {
diff.Minor(strconv.Itoa(strconv.Atoi(newTag.Minor) - strconv.Atoi(curTag.Minor)))
}
if !curTag.MissingPatch {
diff.Patch(strconv.Itoa(strconv.Atoi(newTag.Patch) - strconv.Atoi(curTag.Patch)))
}
return diff, nil
}
// CommitHashPattern matches commit-like hash tags
var CommitHashPattern = "^[a-f0-9]{7,40}$"