| // Copyright Istio Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package resource |
| |
| import ( |
| "fmt" |
| "sort" |
| "strconv" |
| "strings" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go-pixiu/pilot/pkg/model" |
| "github.com/apache/dubbo-go-pixiu/pkg/test/framework/config" |
| ) |
| |
| var _ config.Value = &RevVerMap{} |
| |
| // RevVerMap maps installed revisions to their Istio versions. |
| type RevVerMap map[string]IstioVersion |
| |
| func (rv *RevVerMap) SetConfig(mi interface{}) error { |
| m, ok := mi.(config.Map) |
| if !ok { |
| return fmt.Errorf("revisions map: expected map but got slice") |
| } |
| out := make(RevVerMap) |
| for k := range m { |
| version := m.String(k) |
| v, err := NewIstioVersion(version) |
| if err != nil { |
| return fmt.Errorf("could not parse %s as version: %w", |
| version, err) |
| } |
| out[k] = v |
| } |
| *rv = out |
| return nil |
| } |
| |
| // Set parses IstioVersions from a string flag in the form "a=1.5.6,b,c=1.4". |
| // If no version is specified for a revision assume latest, represented as "" |
| func (rv *RevVerMap) Set(value string) error { |
| m := make(map[string]IstioVersion) |
| rvPairs := strings.Split(value, ",") |
| for _, rv := range rvPairs { |
| s := strings.Split(rv, "=") |
| rev := s[0] |
| if len(s) == 1 { |
| m[rev] = "" |
| } else if len(s) == 2 { |
| ver := s[1] |
| v, err := NewIstioVersion(ver) |
| if err != nil { |
| return fmt.Errorf("could not parse %s as version: %w", |
| ver, err) |
| } |
| m[rev] = v |
| } else { |
| return fmt.Errorf("invalid revision<->version pairing specified: %q", rv) |
| } |
| } |
| *rv = m |
| return nil |
| } |
| |
| func (rv *RevVerMap) String() string { |
| if rv == nil { |
| return "" |
| } |
| var rvPairs []string |
| for rev, ver := range *rv { |
| if ver == "" { |
| ver = "latest" |
| } |
| rvPairs = append(rvPairs, |
| fmt.Sprintf("%s=%s", rev, ver)) |
| } |
| return strings.Join(rvPairs, ",") |
| } |
| |
| // Versions returns the Istio versions present in the given RevVerMap. |
| func (rv *RevVerMap) Versions() IstioVersions { |
| if rv == nil { |
| return nil |
| } |
| var vers []IstioVersion |
| for _, v := range *rv { |
| vers = append(vers, v) |
| } |
| return vers |
| } |
| |
| // Default returns the revision with the newest `IstioVersion`, or in the case of a tie, the first |
| // alphabetically. |
| func (rv *RevVerMap) Default() string { |
| if rv == nil || len(*rv) == 0 { |
| return "" |
| } |
| max := rv.Maximum() |
| var candidates []string |
| for rev, ver := range *rv { |
| if ver.Compare(max) == 0 { |
| candidates = append(candidates, rev) |
| } |
| } |
| if len(candidates) == 0 { |
| panic("could not find revision with max IstioVersion") |
| } |
| sort.Strings(candidates) |
| if candidates[0] == "default" { |
| return "" |
| } |
| return candidates[0] |
| } |
| |
| // Minimum returns the minimum version from the revision-version mapping. |
| func (rv *RevVerMap) Minimum() IstioVersion { |
| return rv.Versions().Minimum() |
| } |
| |
| // Maximum returns the maximum version from the revision-version mapping. |
| func (rv *RevVerMap) Maximum() IstioVersion { |
| return rv.Versions().Maximum() |
| } |
| |
| // AtLeast returns true if the minimum Istio version under test is at least the given version. |
| func (rv *RevVerMap) AtLeast(v IstioVersion) bool { |
| return rv.Versions().Minimum().Compare(v) >= 0 |
| } |
| |
| // IsMultiVersion returns whether the associated IstioVersions have multiple specified versions. |
| func (rv *RevVerMap) IsMultiVersion() bool { |
| return rv != nil && len(*rv) > 0 |
| } |
| |
| // TemplateMap creates a map of revisions and versions suitable for templating. |
| func (rv *RevVerMap) TemplateMap() map[string]string { |
| if rv == nil { |
| return nil |
| } |
| templateMap := make(map[string]string) |
| if len(*rv) == 0 { |
| // if there are no entries, generate a dummy value so that we don't render |
| // deployment template with empty loop |
| templateMap[""] = "" |
| return templateMap |
| } |
| for r, v := range *rv { |
| templateMap[r] = string(v) |
| } |
| return templateMap |
| } |
| |
| // IstioVersion is an Istio version running within a cluster. |
| type IstioVersion string |
| |
| // IstioVersions represents a collection of Istio versions running in a cluster. |
| type IstioVersions []IstioVersion |
| |
| // NewIstioVersion creates an IstioVersion with validation. |
| func NewIstioVersion(s string) (IstioVersion, error) { |
| // empty version string sentinel value for latest |
| if s == "" { |
| return "", nil |
| } |
| parts := strings.Split(s, ".") |
| if len(parts) < 2 || len(parts) > 3 { |
| return "", fmt.Errorf("cannot parse version from %s", s) |
| } |
| for _, part := range parts { |
| if _, err := strconv.Atoi(part); err != nil { |
| return "", fmt.Errorf("cannot use %s as version part", part) |
| } |
| } |
| return IstioVersion(s), nil |
| } |
| |
| // Compare compares two Istio versions. Returns -1 if version "v" is less than "other", 0 if the same, |
| // and 1 if "v" is greater than "other". |
| func (v IstioVersion) Compare(other IstioVersion) int { |
| ver := model.ParseIstioVersion(string(v)) |
| otherVer := model.ParseIstioVersion(string(other)) |
| return ver.Compare(otherVer) |
| } |
| |
| // Minimum returns the minimum from a set of IstioVersions |
| // returns empty value if no versions. |
| func (v IstioVersions) Minimum() IstioVersion { |
| if len(v) == 0 { |
| return "" |
| } |
| min := v[0] |
| for i := 1; i < len(v); i++ { |
| ver := v[i] |
| if ver.Compare(min) < 0 { |
| min = ver |
| } |
| } |
| return min |
| } |
| |
| // Maximum returns the maximum from a set of IstioVersions |
| // returns empty value if no versions. |
| func (v IstioVersions) Maximum() IstioVersion { |
| if len(v) == 0 { |
| return "" |
| } |
| max := v[0] |
| for i := 1; i < len(v); i++ { |
| ver := v[i] |
| if ver.Compare(max) > 0 { |
| max = ver |
| } |
| } |
| return max |
| } |