| // 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 gateway |
| |
| import ( |
| "embed" |
| "strings" |
| "text/template" |
| ) |
| |
| import ( |
| "github.com/Masterminds/sprig/v3" |
| "sigs.k8s.io/yaml" |
| ) |
| |
| // Templates embeds the templates |
| // |
| //go:embed templates/* |
| var Templates embed.FS |
| |
| func funcMap() template.FuncMap { |
| f := sprig.TxtFuncMap() |
| // strdict is the same as the "dict" function (http://masterminds.github.io/sprig/dicts.html) |
| // but returns a map[string]string instead of interface{} types. This allows it to be used |
| // in annotations/labels. |
| f["strdict"] = func(v ...string) map[string]string { |
| dict := map[string]string{} |
| lenv := len(v) |
| for i := 0; i < lenv; i += 2 { |
| key := v[i] |
| if i+1 >= lenv { |
| dict[key] = "" |
| continue |
| } |
| dict[key] = v[i+1] |
| } |
| return dict |
| } |
| f["toYamlMap"] = func(mps ...map[string]string) string { |
| data, err := yaml.Marshal(mergeMaps(mps...)) |
| if err != nil { |
| return "" |
| } |
| return strings.TrimSuffix(string(data), "\n") |
| } |
| f["omit"] = func(dict map[string]string, keys ...string) map[string]string { |
| res := map[string]string{} |
| |
| omit := make(map[string]bool, len(keys)) |
| for _, k := range keys { |
| omit[k] = true |
| } |
| |
| for k, v := range dict { |
| if _, ok := omit[k]; !ok { |
| res[k] = v |
| } |
| } |
| return res |
| } |
| return f |
| } |
| |
| func processTemplates() *template.Template { |
| t, err := template.New("gateway").Funcs(funcMap()).ParseFS(Templates, "templates/*.yaml") |
| if err != nil { |
| panic(err.Error()) |
| } |
| return t |
| } |