/
serialize.go
76 lines (64 loc) · 1.9 KB
/
serialize.go
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// Copyright 2015 CoreOS, Inc.
//
// 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 systemd
import (
"bytes"
"io"
"github.com/coreos/go-systemd/v22/unit"
)
// UnitSerialize encodes all of the given UnitOption objects into a unit file.
// Renamed from Serialize from github.com/coreos/go-systemd/unit so as to not
// conflict with the exported internal function in export_test.go.
func UnitSerialize(opts []*unit.UnitOption) io.Reader {
var buf bytes.Buffer
if len(opts) == 0 {
return &buf
}
idx := map[string][]*unit.UnitOption{}
for _, opt := range opts {
idx[opt.Section] = append(idx[opt.Section], opt)
}
// CHANGED HERE: Output in the following order:
// - Unit
// - Service
// - Install
// rather than just iterating over the map in random order.
for _, curSection := range []string{"Unit", "Service", "Install"} {
curOpts, found := idx[curSection]
if !found {
continue
}
writeSectionHeader(&buf, curSection)
writeNewline(&buf)
for _, opt := range curOpts {
writeOption(&buf, opt)
writeNewline(&buf)
}
writeNewline(&buf)
}
return &buf
}
func writeNewline(buf *bytes.Buffer) {
buf.WriteRune('\n')
}
func writeSectionHeader(buf *bytes.Buffer, section string) {
buf.WriteRune('[')
buf.WriteString(section)
buf.WriteRune(']')
}
func writeOption(buf *bytes.Buffer, opt *unit.UnitOption) {
buf.WriteString(opt.Name)
buf.WriteRune('=')
buf.WriteString(opt.Value)
}