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bae9f6d2 JC |
1 | package terraform |
2 | ||
3 | import ( | |
4 | "fmt" | |
5 | "strings" | |
6 | ||
7 | "github.com/hashicorp/terraform/config" | |
8 | "github.com/hashicorp/terraform/dag" | |
9 | ) | |
10 | ||
11 | // ConcreteResourceNodeFunc is a callback type used to convert an | |
12 | // abstract resource to a concrete one of some type. | |
13 | type ConcreteResourceNodeFunc func(*NodeAbstractResource) dag.Vertex | |
14 | ||
15 | // GraphNodeResource is implemented by any nodes that represent a resource. | |
16 | // The type of operation cannot be assumed, only that this node represents | |
17 | // the given resource. | |
18 | type GraphNodeResource interface { | |
19 | ResourceAddr() *ResourceAddress | |
20 | } | |
21 | ||
22 | // NodeAbstractResource represents a resource that has no associated | |
23 | // operations. It registers all the interfaces for a resource that common | |
24 | // across multiple operation types. | |
25 | type NodeAbstractResource struct { | |
26 | Addr *ResourceAddress // Addr is the address for this resource | |
27 | ||
28 | // The fields below will be automatically set using the Attach | |
29 | // interfaces if you're running those transforms, but also be explicitly | |
30 | // set if you already have that information. | |
31 | ||
32 | Config *config.Resource // Config is the resource in the config | |
33 | ResourceState *ResourceState // ResourceState is the ResourceState for this | |
34 | ||
35 | Targets []ResourceAddress // Set from GraphNodeTargetable | |
36 | } | |
37 | ||
38 | func (n *NodeAbstractResource) Name() string { | |
39 | return n.Addr.String() | |
40 | } | |
41 | ||
42 | // GraphNodeSubPath | |
43 | func (n *NodeAbstractResource) Path() []string { | |
44 | return n.Addr.Path | |
45 | } | |
46 | ||
47 | // GraphNodeReferenceable | |
48 | func (n *NodeAbstractResource) ReferenceableName() []string { | |
49 | // We always are referenceable as "type.name" as long as | |
50 | // we have a config or address. Determine what that value is. | |
51 | var id string | |
52 | if n.Config != nil { | |
53 | id = n.Config.Id() | |
54 | } else if n.Addr != nil { | |
55 | addrCopy := n.Addr.Copy() | |
56 | addrCopy.Path = nil // ReferenceTransformer handles paths | |
57 | addrCopy.Index = -1 // We handle indexes below | |
58 | id = addrCopy.String() | |
59 | } else { | |
60 | // No way to determine our type.name, just return | |
61 | return nil | |
62 | } | |
63 | ||
64 | var result []string | |
65 | ||
66 | // Always include our own ID. This is primarily for backwards | |
67 | // compatibility with states that didn't yet support the more | |
68 | // specific dep string. | |
69 | result = append(result, id) | |
70 | ||
71 | // We represent all multi-access | |
72 | result = append(result, fmt.Sprintf("%s.*", id)) | |
73 | ||
74 | // We represent either a specific number, or all numbers | |
75 | suffix := "N" | |
76 | if n.Addr != nil { | |
77 | idx := n.Addr.Index | |
78 | if idx == -1 { | |
79 | idx = 0 | |
80 | } | |
81 | ||
82 | suffix = fmt.Sprintf("%d", idx) | |
83 | } | |
84 | result = append(result, fmt.Sprintf("%s.%s", id, suffix)) | |
85 | ||
86 | return result | |
87 | } | |
88 | ||
89 | // GraphNodeReferencer | |
90 | func (n *NodeAbstractResource) References() []string { | |
91 | // If we have a config, that is our source of truth | |
92 | if c := n.Config; c != nil { | |
93 | // Grab all the references | |
94 | var result []string | |
95 | result = append(result, c.DependsOn...) | |
96 | result = append(result, ReferencesFromConfig(c.RawCount)...) | |
97 | result = append(result, ReferencesFromConfig(c.RawConfig)...) | |
98 | for _, p := range c.Provisioners { | |
99 | if p.When == config.ProvisionerWhenCreate { | |
100 | result = append(result, ReferencesFromConfig(p.ConnInfo)...) | |
101 | result = append(result, ReferencesFromConfig(p.RawConfig)...) | |
102 | } | |
103 | } | |
104 | ||
105 | return uniqueStrings(result) | |
106 | } | |
107 | ||
108 | // If we have state, that is our next source | |
109 | if s := n.ResourceState; s != nil { | |
110 | return s.Dependencies | |
111 | } | |
112 | ||
113 | return nil | |
114 | } | |
115 | ||
116 | // StateReferences returns the dependencies to put into the state for | |
117 | // this resource. | |
118 | func (n *NodeAbstractResource) StateReferences() []string { | |
119 | self := n.ReferenceableName() | |
120 | ||
121 | // Determine what our "prefix" is for checking for references to | |
122 | // ourself. | |
123 | addrCopy := n.Addr.Copy() | |
124 | addrCopy.Index = -1 | |
125 | selfPrefix := addrCopy.String() + "." | |
126 | ||
127 | depsRaw := n.References() | |
128 | deps := make([]string, 0, len(depsRaw)) | |
129 | for _, d := range depsRaw { | |
130 | // Ignore any variable dependencies | |
131 | if strings.HasPrefix(d, "var.") { | |
132 | continue | |
133 | } | |
134 | ||
135 | // If this has a backup ref, ignore those for now. The old state | |
136 | // file never contained those and I'd rather store the rich types we | |
137 | // add in the future. | |
138 | if idx := strings.IndexRune(d, '/'); idx != -1 { | |
139 | d = d[:idx] | |
140 | } | |
141 | ||
142 | // If we're referencing ourself, then ignore it | |
143 | found := false | |
144 | for _, s := range self { | |
145 | if d == s { | |
146 | found = true | |
147 | } | |
148 | } | |
149 | if found { | |
150 | continue | |
151 | } | |
152 | ||
153 | // If this is a reference to ourself and a specific index, we keep | |
154 | // it. For example, if this resource is "foo.bar" and the reference | |
155 | // is "foo.bar.0" then we keep it exact. Otherwise, we strip it. | |
156 | if strings.HasSuffix(d, ".0") && !strings.HasPrefix(d, selfPrefix) { | |
157 | d = d[:len(d)-2] | |
158 | } | |
159 | ||
160 | // This is sad. The dependencies are currently in the format of | |
161 | // "module.foo.bar" (the full field). This strips the field off. | |
162 | if strings.HasPrefix(d, "module.") { | |
163 | parts := strings.SplitN(d, ".", 3) | |
164 | d = strings.Join(parts[0:2], ".") | |
165 | } | |
166 | ||
167 | deps = append(deps, d) | |
168 | } | |
169 | ||
170 | return deps | |
171 | } | |
172 | ||
173 | // GraphNodeProviderConsumer | |
174 | func (n *NodeAbstractResource) ProvidedBy() []string { | |
175 | // If we have a config we prefer that above all else | |
176 | if n.Config != nil { | |
177 | return []string{resourceProvider(n.Config.Type, n.Config.Provider)} | |
178 | } | |
179 | ||
180 | // If we have state, then we will use the provider from there | |
181 | if n.ResourceState != nil && n.ResourceState.Provider != "" { | |
182 | return []string{n.ResourceState.Provider} | |
183 | } | |
184 | ||
185 | // Use our type | |
186 | return []string{resourceProvider(n.Addr.Type, "")} | |
187 | } | |
188 | ||
189 | // GraphNodeProvisionerConsumer | |
190 | func (n *NodeAbstractResource) ProvisionedBy() []string { | |
191 | // If we have no configuration, then we have no provisioners | |
192 | if n.Config == nil { | |
193 | return nil | |
194 | } | |
195 | ||
196 | // Build the list of provisioners we need based on the configuration. | |
197 | // It is okay to have duplicates here. | |
198 | result := make([]string, len(n.Config.Provisioners)) | |
199 | for i, p := range n.Config.Provisioners { | |
200 | result[i] = p.Type | |
201 | } | |
202 | ||
203 | return result | |
204 | } | |
205 | ||
206 | // GraphNodeResource, GraphNodeAttachResourceState | |
207 | func (n *NodeAbstractResource) ResourceAddr() *ResourceAddress { | |
208 | return n.Addr | |
209 | } | |
210 | ||
211 | // GraphNodeAddressable, TODO: remove, used by target, should unify | |
212 | func (n *NodeAbstractResource) ResourceAddress() *ResourceAddress { | |
213 | return n.ResourceAddr() | |
214 | } | |
215 | ||
216 | // GraphNodeTargetable | |
217 | func (n *NodeAbstractResource) SetTargets(targets []ResourceAddress) { | |
218 | n.Targets = targets | |
219 | } | |
220 | ||
221 | // GraphNodeAttachResourceState | |
222 | func (n *NodeAbstractResource) AttachResourceState(s *ResourceState) { | |
223 | n.ResourceState = s | |
224 | } | |
225 | ||
226 | // GraphNodeAttachResourceConfig | |
227 | func (n *NodeAbstractResource) AttachResourceConfig(c *config.Resource) { | |
228 | n.Config = c | |
229 | } | |
230 | ||
231 | // GraphNodeDotter impl. | |
232 | func (n *NodeAbstractResource) DotNode(name string, opts *dag.DotOpts) *dag.DotNode { | |
233 | return &dag.DotNode{ | |
234 | Name: name, | |
235 | Attrs: map[string]string{ | |
236 | "label": n.Name(), | |
237 | "shape": "box", | |
238 | }, | |
239 | } | |
240 | } |