-
Notifications
You must be signed in to change notification settings - Fork 0
/
template.go
59 lines (50 loc) · 1.44 KB
/
template.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
// Copyright 2023 The Heimdall 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
//
// https://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.
//go:build !no_eval && !no_eval_template
package eval
import (
"reflect"
"strings"
"text/template"
"github.com/abc-inc/heimdall/internal"
)
type tmplEngine struct {
tmpl *template.Template
}
func newTmplEngine() engine {
return &tmplEngine{template.New("base")}
}
func (e *tmplEngine) eval(cfg evalCfg, envMap map[string]any) (res []string, err error) {
internal.MustNoErr(e.addFunc(envMap))
for _, str := range cfg.expr {
e.tmpl = template.Must(e.tmpl.Parse(str))
w := strings.Builder{}
internal.MustNoErr(e.tmpl.Execute(&w, envMap))
res = append(res, w.String())
}
return
}
func (e *tmplEngine) addFunc(funcMap map[string]any) error {
fns := make(map[string]any)
for n, f := range funcMap {
if reflect.TypeOf(f).Kind() == reflect.Func {
fns[n] = f
}
}
e.tmpl.Funcs(fns)
return nil
}
func init() {
engines["template"] = newTmplEngine
}