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Commit | Line | Data |
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bae9f6d2 JC |
1 | package plugin |
2 | ||
3 | import ( | |
4 | "net/rpc" | |
5 | ||
6 | "github.com/hashicorp/go-plugin" | |
107c1cdb | 7 | "github.com/hashicorp/terraform/configs/configschema" |
bae9f6d2 JC |
8 | "github.com/hashicorp/terraform/terraform" |
9 | ) | |
10 | ||
11 | // ResourceProvisionerPlugin is the plugin.Plugin implementation. | |
12 | type ResourceProvisionerPlugin struct { | |
107c1cdb | 13 | ResourceProvisioner func() terraform.ResourceProvisioner |
bae9f6d2 JC |
14 | } |
15 | ||
16 | func (p *ResourceProvisionerPlugin) Server(b *plugin.MuxBroker) (interface{}, error) { | |
107c1cdb ND |
17 | return &ResourceProvisionerServer{ |
18 | Broker: b, | |
19 | Provisioner: p.ResourceProvisioner(), | |
20 | }, nil | |
bae9f6d2 JC |
21 | } |
22 | ||
23 | func (p *ResourceProvisionerPlugin) Client( | |
24 | b *plugin.MuxBroker, c *rpc.Client) (interface{}, error) { | |
25 | return &ResourceProvisioner{Broker: b, Client: c}, nil | |
26 | } | |
27 | ||
28 | // ResourceProvisioner is an implementation of terraform.ResourceProvisioner | |
29 | // that communicates over RPC. | |
30 | type ResourceProvisioner struct { | |
31 | Broker *plugin.MuxBroker | |
32 | Client *rpc.Client | |
33 | } | |
34 | ||
107c1cdb ND |
35 | func (p *ResourceProvisioner) GetConfigSchema() (*configschema.Block, error) { |
36 | panic("not implemented") | |
37 | return nil, nil | |
38 | } | |
39 | ||
bae9f6d2 JC |
40 | func (p *ResourceProvisioner) Validate(c *terraform.ResourceConfig) ([]string, []error) { |
41 | var resp ResourceProvisionerValidateResponse | |
42 | args := ResourceProvisionerValidateArgs{ | |
43 | Config: c, | |
44 | } | |
45 | ||
46 | err := p.Client.Call("Plugin.Validate", &args, &resp) | |
47 | if err != nil { | |
48 | return nil, []error{err} | |
49 | } | |
50 | ||
51 | var errs []error | |
52 | if len(resp.Errors) > 0 { | |
53 | errs = make([]error, len(resp.Errors)) | |
54 | for i, err := range resp.Errors { | |
55 | errs[i] = err | |
56 | } | |
57 | } | |
58 | ||
59 | return resp.Warnings, errs | |
60 | } | |
61 | ||
62 | func (p *ResourceProvisioner) Apply( | |
63 | output terraform.UIOutput, | |
64 | s *terraform.InstanceState, | |
65 | c *terraform.ResourceConfig) error { | |
66 | id := p.Broker.NextId() | |
67 | go p.Broker.AcceptAndServe(id, &UIOutputServer{ | |
68 | UIOutput: output, | |
69 | }) | |
70 | ||
71 | var resp ResourceProvisionerApplyResponse | |
72 | args := &ResourceProvisionerApplyArgs{ | |
73 | OutputId: id, | |
74 | State: s, | |
75 | Config: c, | |
76 | } | |
77 | ||
78 | err := p.Client.Call("Plugin.Apply", args, &resp) | |
79 | if err != nil { | |
80 | return err | |
81 | } | |
82 | if resp.Error != nil { | |
83 | err = resp.Error | |
84 | } | |
85 | ||
86 | return err | |
87 | } | |
88 | ||
89 | func (p *ResourceProvisioner) Stop() error { | |
90 | var resp ResourceProvisionerStopResponse | |
91 | err := p.Client.Call("Plugin.Stop", new(interface{}), &resp) | |
92 | if err != nil { | |
93 | return err | |
94 | } | |
95 | if resp.Error != nil { | |
96 | err = resp.Error | |
97 | } | |
98 | ||
99 | return err | |
100 | } | |
101 | ||
102 | func (p *ResourceProvisioner) Close() error { | |
103 | return p.Client.Close() | |
104 | } | |
105 | ||
106 | type ResourceProvisionerValidateArgs struct { | |
107 | Config *terraform.ResourceConfig | |
108 | } | |
109 | ||
110 | type ResourceProvisionerValidateResponse struct { | |
111 | Warnings []string | |
112 | Errors []*plugin.BasicError | |
113 | } | |
114 | ||
115 | type ResourceProvisionerApplyArgs struct { | |
116 | OutputId uint32 | |
117 | State *terraform.InstanceState | |
118 | Config *terraform.ResourceConfig | |
119 | } | |
120 | ||
121 | type ResourceProvisionerApplyResponse struct { | |
122 | Error *plugin.BasicError | |
123 | } | |
124 | ||
125 | type ResourceProvisionerStopResponse struct { | |
126 | Error *plugin.BasicError | |
127 | } | |
128 | ||
129 | // ResourceProvisionerServer is a net/rpc compatible structure for serving | |
130 | // a ResourceProvisioner. This should not be used directly. | |
131 | type ResourceProvisionerServer struct { | |
132 | Broker *plugin.MuxBroker | |
133 | Provisioner terraform.ResourceProvisioner | |
134 | } | |
135 | ||
136 | func (s *ResourceProvisionerServer) Apply( | |
137 | args *ResourceProvisionerApplyArgs, | |
138 | result *ResourceProvisionerApplyResponse) error { | |
139 | conn, err := s.Broker.Dial(args.OutputId) | |
140 | if err != nil { | |
141 | *result = ResourceProvisionerApplyResponse{ | |
142 | Error: plugin.NewBasicError(err), | |
143 | } | |
144 | return nil | |
145 | } | |
146 | client := rpc.NewClient(conn) | |
147 | defer client.Close() | |
148 | ||
149 | output := &UIOutput{Client: client} | |
150 | ||
151 | err = s.Provisioner.Apply(output, args.State, args.Config) | |
152 | *result = ResourceProvisionerApplyResponse{ | |
153 | Error: plugin.NewBasicError(err), | |
154 | } | |
155 | return nil | |
156 | } | |
157 | ||
158 | func (s *ResourceProvisionerServer) Validate( | |
159 | args *ResourceProvisionerValidateArgs, | |
160 | reply *ResourceProvisionerValidateResponse) error { | |
161 | warns, errs := s.Provisioner.Validate(args.Config) | |
162 | berrs := make([]*plugin.BasicError, len(errs)) | |
163 | for i, err := range errs { | |
164 | berrs[i] = plugin.NewBasicError(err) | |
165 | } | |
166 | *reply = ResourceProvisionerValidateResponse{ | |
167 | Warnings: warns, | |
168 | Errors: berrs, | |
169 | } | |
170 | return nil | |
171 | } | |
172 | ||
173 | func (s *ResourceProvisionerServer) Stop( | |
174 | _ interface{}, | |
175 | reply *ResourceProvisionerStopResponse) error { | |
176 | err := s.Provisioner.Stop() | |
177 | *reply = ResourceProvisionerStopResponse{ | |
178 | Error: plugin.NewBasicError(err), | |
179 | } | |
180 | ||
181 | return nil | |
182 | } |