/
core.go
191 lines (171 loc) · 4.62 KB
/
core.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
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
// MITHRAS: Javascript configuration management tool for AWS.
// Copyright (C) 2016, Colin Steele
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
// @public
//
// # CORE FUNCTIONS: CORE
//
package core
// @public
//
// This package exports several entry points into the JS environment,
// including:
//
// > * [sanitize](#sanitize)
//
// This API allows exposes "core" functions to JS.
//
// ## SANITIZE
// <a name="sanitize"></a>
// `sanitize(thing_from_go);`
//
// Make an object returned from a raw Go function and make it
// digestible by JS.
//
// TODO: kill this???
//
// Example:
//
// ```
//
// sanitize(<something>);
//
// ```
//
import (
"encoding/json"
"fmt"
log "github.com/Sirupsen/logrus"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/robertkrimen/otto"
)
type ModuleVersion struct{ Version, Module string }
type Context struct {
Runtime *otto.Otto
JsDir string
Home string
Verbose bool
Args []string
Modules []ModuleVersion
Version string
}
var InitFuncs []func(*Context)
func (c *Context) Throw(str string) {
panic(c.Runtime.MakeCustomError("MithrasError", str))
}
func (c *Context) Throwf(format string, a ...interface{}) {
panic(c.Runtime.MakeCustomError("MithrasError", fmt.Sprintf(format, a...)))
}
func RegisterInit(f func(*Context)) {
InitFuncs = append(InitFuncs, f)
}
func IsVerbose(rt *otto.Otto) bool {
js := `(function () { return mithras["verbose"]; })`
v, err := rt.Call(js, nil)
if err != nil {
log.Fatalf("Mithras object is missing: %s", err)
}
if v.IsBoolean() {
verbose, err := v.ToBoolean()
if err != nil {
log.Fatalf("Mithras object error: %s", err)
}
return verbose
}
log.Fatalf("Mithras object error: 'verbose' is not a boolean")
return false
}
func Tag(rt *otto.Otto, tags otto.Object, id string, region string, verbose bool) {
svc := ec2.New(session.New(),
aws.NewConfig().WithRegion(region).WithMaxRetries(5))
params := &ec2.CreateTagsInput{
Resources: []*string{aws.String(id)},
Tags: []*ec2.Tag{},
}
js := `(function (cb) { for (var key in this) {
cb(key, this[key]);
}
})`
_, err := rt.Call(js,
tags,
func(call otto.FunctionCall) otto.Value {
t := ec2.Tag{
Key: aws.String(call.Argument(0).String()),
Value: aws.String(call.Argument(1).String()),
}
params.Tags = append(params.Tags, &t)
return otto.FalseValue()
})
if err != nil {
log.Fatalf("Error obtaining tags from object.")
}
_, err = svc.CreateTags(params)
if err != nil {
log.Fatalf("Error tagging '%s': %s", id, err)
}
}
func Sanitize(rt *otto.Otto, o interface{}) otto.Value {
j, err := json.Marshal(o)
if err != nil {
log.Fatalf("Sanitize marhsall error:", err)
}
js := `(function (json) { return JSON.parse(json); })`
val, err := rt.Call(js, nil, string(j))
if err != nil {
log.Fatalf("Sanitize can't create object: %s", err)
}
return val
}
func Sanitizer(rt *otto.Otto) func(objs ...interface{}) otto.Value {
return func(objs ...interface{}) otto.Value {
marshalled := []string{}
for _, o := range objs {
j, err := json.Marshal(o)
if err != nil {
log.Fatalf("Sanitizer marhsall error:", err)
}
marshalled = append(marshalled, string(j))
}
js := `(function (things) {
var parsed = _.map(things, function(thing){
return JSON.parse(thing);
});
if (parsed.length == 1) {
return parsed[0];
} else {
return parsed;
}
})`
val, err := rt.Call(js, nil, marshalled)
if err != nil {
log.Fatalf("Sanitizer error sanitizing objects: %s", err)
}
return val
}
}
func init() {
RegisterInit(func(context *Context) {
rt := context.Runtime
rt.Set("sanitize", func(call otto.FunctionCall) otto.Value {
val, err := call.Argument(0).Export()
if err != nil {
log.Fatalf("Sanitize export error: %s", err)
}
return Sanitize(rt, val)
})
})
}