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
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
package templater
import (
"bytes"
"fmt"
"io/ioutil"
"os"
"path"
"strings"
"text/template"
"github.com/polydawn/meep"
"github.com/tazjin/kontemplate/context"
)
// Error that is caused by non-existent template files being specified
type TemplateNotFoundError struct {
meep.AllTraits
Name string
}
// Error that is caused during templating, e.g. required value being absent or invalid template format
type TemplatingError struct {
meep.AllTraits
}
func LoadAndPrepareTemplates(limit *[]string, c *context.Context) (output []string, err error) {
for _, rs := range c.ResourceSets {
if resourceSetIncluded(limit, &rs.Name) {
err = processResourceSet(c, &rs, &output)
if err != nil {
return
}
}
}
return
}
func resourceSetIncluded(limit *[]string, resourceSetName *string) bool {
if len(*limit) == 0 {
return true
}
for _, name := range *limit {
if name == *resourceSetName {
return true
}
}
return false
}
func processResourceSet(c *context.Context, rs *context.ResourceSet, output *[]string) error {
fmt.Fprintf(os.Stderr, "Loading resources for %s\n", rs.Name)
rp := path.Join(c.BaseDir, rs.Name)
files, err := ioutil.ReadDir(rp)
err = processFiles(c, rs, rp, files, output)
if err != nil {
return meep.New(
&TemplateNotFoundError{Name: rs.Name},
meep.Cause(err),
)
}
return nil
}
func processFiles(c *context.Context, rs *context.ResourceSet, rp string, files []os.FileInfo, output *[]string) error {
for _, file := range files {
if !file.IsDir() && isResourceFile(file) {
p := path.Join(rp, file.Name())
o, err := templateFile(c, rs, p)
if err != nil {
return err
}
*output = append(*output, o)
}
}
return nil
}
func templateFile(c *context.Context, rs *context.ResourceSet, filename string) (string, error) {
tpl, err := template.ParseFiles(filename)
if err != nil {
return "", meep.New(
&TemplateNotFoundError{Name: filename},
meep.Cause(err),
)
}
var b bytes.Buffer
// Merge global and resourceset-specific values (don't override from global)
for k, v := range c.Global {
if _, ok := rs.Values[k]; !ok {
rs.Values[k] = v
}
}
err = tpl.Execute(&b, rs.Values)
if err != nil {
return "", meep.New(
&TemplatingError{},
meep.Cause(err),
)
}
return b.String(), nil
}
// Checks whether a file is a resource file (i.e. is YAML or JSON)
func isResourceFile(f os.FileInfo) bool {
return strings.HasSuffix(f.Name(), "yaml") ||
strings.HasSuffix(f.Name(), "yml") ||
strings.HasSuffix(f.Name(), "json")
}
|
