func addImplications(store *storage.Storage, tx *storage.Tx, tagArgs []string) (error, warnings) {
log.Infof(2, "loading settings")
settings, err := store.Settings(tx)
if err != nil {
return err, nil
}
implyingTagArg := tagArgs[0]
impliedTagArgs := tagArgs[1:]
implyingTagName, implyingValueName := parseTagEqValueName(implyingTagArg)
implyingTag, err := store.TagByName(tx, implyingTagName)
if err != nil {
return err, nil
}
if implyingTag == nil {
if settings.AutoCreateTags() {
implyingTag, err = createTag(store, tx, implyingTagName)
if err != nil {
return err, nil
}
} else {
return NoSuchTagError{implyingTagName}, nil
}
}
implyingValue, err := store.ValueByName(tx, implyingValueName)
if err != nil {
return err, nil
}
if implyingValue == nil {
if settings.AutoCreateValues() {
implyingValue, err = createValue(store, tx, implyingValueName)
if err != nil {
return err, nil
}
} else {
return NoSuchValueError{implyingValueName}, nil
}
}
warnings := make(warnings, 0, 10)
for _, impliedTagArg := range impliedTagArgs {
impliedTagName, impliedValueName := parseTagEqValueName(impliedTagArg)
impliedTag, err := store.TagByName(tx, impliedTagName)
if err != nil {
return err, warnings
}
if impliedTag == nil {
if settings.AutoCreateTags() {
impliedTag, err = createTag(store, tx, impliedTagName)
if err != nil {
return err, warnings
}
} else {
warnings = append(warnings, fmt.Sprintf("no such tag '%v'", impliedTagName))
continue
}
}
impliedValue, err := store.ValueByName(tx, impliedValueName)
if err != nil {
return err, warnings
}
if impliedValue == nil {
if settings.AutoCreateValues() {
impliedValue, err = createValue(store, tx, impliedValueName)
if err != nil {
return err, warnings
}
} else {
warnings = append(warnings, fmt.Sprintf("no such value '%v'", impliedValueName))
continue
}
}
log.Infof(2, "adding tag implication of '%v' to '%v'", implyingTagArg, impliedTagArg)
if err = store.AddImplication(tx, entities.TagIdValueIdPair{implyingTag.Id, implyingValue.Id}, entities.TagIdValueIdPair{impliedTag.Id, impliedValue.Id}); err != nil {
return fmt.Errorf("cannot add implication of '%v' to '%v': %v", implyingTagArg, impliedTagArg, err), warnings
}
}
return nil, warnings
}