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https://github.com/encounter/haproxy-ingress.git
synced 2026-03-30 11:12:55 -07:00
Joao Morais
61 lines
1.6 KiB
Go
61 lines
1.6 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package controller
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import (
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"bytes"
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"github.com/golang/glog"
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"github.com/jcmoraisjr/haproxy-ingress/pkg/types"
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"os/exec"
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gotemplate "text/template"
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)
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type template struct {
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tmpl *gotemplate.Template
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rawConfig *bytes.Buffer
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fmtConfig *bytes.Buffer
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}
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func newTemplate(name string, file string) *template {
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tmpl, err := gotemplate.New(name).ParseFiles(file)
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if err != nil {
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glog.Fatalf("Cannot read template file: %v", err)
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}
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return &template{
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tmpl: tmpl,
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rawConfig: bytes.NewBuffer(make([]byte, 0, 16384)),
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fmtConfig: bytes.NewBuffer(make([]byte, 0, 16384)),
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}
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}
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func (t *template) execute(cfg *types.ControllerConfig) ([]byte, error) {
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t.rawConfig.Reset()
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t.fmtConfig.Reset()
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if err := t.tmpl.Execute(t.rawConfig, cfg); err != nil {
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return nil, err
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}
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cmd := exec.Command("sed", "/^ *$/d")
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cmd.Stdin = t.rawConfig
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cmd.Stdout = t.fmtConfig
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if err := cmd.Run(); err != nil {
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glog.Errorf("Template cleaning has failed: %v", err)
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// TODO recover and return raw buffer
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return nil, err
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}
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return t.fmtConfig.Bytes(), nil
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}
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