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
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
package config
import (
"encoding/json"
"fmt"
"io"
"os"
"path/filepath"
"sort"
"strings"
"github.com/hashicorp/hcl"
)
// ErrNoConfigsFound is the error returned by LoadDir if no
// Terraform configuration files were found in the given directory.
type ErrNoConfigsFound struct {
Dir string
}
func (e ErrNoConfigsFound) Error() string {
return fmt.Sprintf(
"No Terraform configuration files found in directory: %s",
e.Dir)
}
// LoadJSON loads a single Terraform configuration from a given JSON document.
//
// The document must be a complete Terraform configuration. This function will
// NOT try to load any additional modules so only the given document is loaded.
func LoadJSON(raw json.RawMessage) (*Config, error) {
obj, err := hcl.Parse(string(raw))
if err != nil {
return nil, fmt.Errorf(
"Error parsing JSON document as HCL: %s", err)
}
// Start building the result
hclConfig := &hclConfigurable{
Root: obj,
}
return hclConfig.Config()
}
// LoadFile loads the Terraform configuration from a given file.
//
// This file can be any format that Terraform recognizes, and import any
// other format that Terraform recognizes.
func LoadFile(path string) (*Config, error) {
importTree, err := loadTree(path)
if err != nil {
return nil, err
}
configTree, err := importTree.ConfigTree()
// Close the importTree now so that we can clear resources as quickly
// as possible.
importTree.Close()
if err != nil {
return nil, err
}
return configTree.Flatten()
}
// LoadDir loads all the Terraform configuration files in a single
// directory and appends them together.
//
// Special files known as "override files" can also be present, which
// are merged into the loaded configuration. That is, the non-override
// files are loaded first to create the configuration. Then, the overrides
// are merged into the configuration to create the final configuration.
//
// Files are loaded in lexical order.
func LoadDir(root string) (*Config, error) {
files, overrides, err := dirFiles(root)
if err != nil {
return nil, err
}
if len(files) == 0 && len(overrides) == 0 {
return nil, &ErrNoConfigsFound{Dir: root}
}
// Determine the absolute path to the directory.
rootAbs, err := filepath.Abs(root)
if err != nil {
return nil, err
}
var result *Config
// Sort the files and overrides so we have a deterministic order
sort.Strings(files)
sort.Strings(overrides)
// Load all the regular files, append them to each other.
for _, f := range files {
c, err := LoadFile(f)
if err != nil {
return nil, err
}
if result != nil {
result, err = Append(result, c)
if err != nil {
return nil, err
}
} else {
result = c
}
}
if len(files) == 0 {
result = &Config{}
}
// Load all the overrides, and merge them into the config
for _, f := range overrides {
c, err := LoadFile(f)
if err != nil {
return nil, err
}
result, err = Merge(result, c)
if err != nil {
return nil, err
}
}
// Mark the directory
result.Dir = rootAbs
return result, nil
}
// IsEmptyDir returns true if the directory given has no Terraform
// configuration files.
func IsEmptyDir(root string) (bool, error) {
if _, err := os.Stat(root); err != nil && os.IsNotExist(err) {
return true, nil
}
fs, os, err := dirFiles(root)
if err != nil {
return false, err
}
return len(fs) == 0 && len(os) == 0, nil
}
// Ext returns the Terraform configuration extension of the given
// path, or a blank string if it is an invalid function.
func ext(path string) string {
if strings.HasSuffix(path, ".tf") {
return ".tf"
} else if strings.HasSuffix(path, ".tf.json") {
return ".tf.json"
} else {
return ""
}
}
func dirFiles(dir string) ([]string, []string, error) {
f, err := os.Open(dir)
if err != nil {
return nil, nil, err
}
defer f.Close()
fi, err := f.Stat()
if err != nil {
return nil, nil, err
}
if !fi.IsDir() {
return nil, nil, fmt.Errorf(
"configuration path must be a directory: %s",
dir)
}
var files, overrides []string
err = nil
for err != io.EOF {
var fis []os.FileInfo
fis, err = f.Readdir(128)
if err != nil && err != io.EOF {
return nil, nil, err
}
for _, fi := range fis {
// Ignore directories
if fi.IsDir() {
continue
}
// Only care about files that are valid to load
name := fi.Name()
extValue := ext(name)
if extValue == "" || IsIgnoredFile(name) {
continue
}
// Determine if we're dealing with an override
nameNoExt := name[:len(name)-len(extValue)]
override := nameNoExt == "override" ||
strings.HasSuffix(nameNoExt, "_override")
path := filepath.Join(dir, name)
if override {
overrides = append(overrides, path)
} else {
files = append(files, path)
}
}
}
return files, overrides, nil
}
// IsIgnoredFile returns true or false depending on whether the
// provided file name is a file that should be ignored.
func IsIgnoredFile(name string) bool {
return strings.HasPrefix(name, ".") || // Unix-like hidden files
strings.HasSuffix(name, "~") || // vim
strings.HasPrefix(name, "#") && strings.HasSuffix(name, "#") // emacs
}
|
