github.com/chalford/terraform@v0.3.7-0.20150113080010-a78c69a8c81f/config/append.go (about) 1 package config 2 3 // Append appends one configuration to another. 4 // 5 // Append assumes that both configurations will not have 6 // conflicting variables, resources, etc. If they do, the 7 // problems will be caught in the validation phase. 8 // 9 // It is possible that c1, c2 on their own are not valid. For 10 // example, a resource in c2 may reference a variable in c1. But 11 // together, they would be valid. 12 func Append(c1, c2 *Config) (*Config, error) { 13 c := new(Config) 14 15 // Append unknown keys, but keep them unique since it is a set 16 unknowns := make(map[string]struct{}) 17 for _, k := range c1.unknownKeys { 18 _, present := unknowns[k] 19 if !present { 20 unknowns[k] = struct{}{} 21 c.unknownKeys = append(c.unknownKeys, k) 22 } 23 } 24 for _, k := range c2.unknownKeys { 25 _, present := unknowns[k] 26 if !present { 27 unknowns[k] = struct{}{} 28 c.unknownKeys = append(c.unknownKeys, k) 29 } 30 } 31 32 if len(c1.Modules) > 0 || len(c2.Modules) > 0 { 33 c.Modules = make( 34 []*Module, 0, len(c1.Modules)+len(c2.Modules)) 35 c.Modules = append(c.Modules, c1.Modules...) 36 c.Modules = append(c.Modules, c2.Modules...) 37 } 38 39 if len(c1.Outputs) > 0 || len(c2.Outputs) > 0 { 40 c.Outputs = make( 41 []*Output, 0, len(c1.Outputs)+len(c2.Outputs)) 42 c.Outputs = append(c.Outputs, c1.Outputs...) 43 c.Outputs = append(c.Outputs, c2.Outputs...) 44 } 45 46 if len(c1.ProviderConfigs) > 0 || len(c2.ProviderConfigs) > 0 { 47 c.ProviderConfigs = make( 48 []*ProviderConfig, 49 0, len(c1.ProviderConfigs)+len(c2.ProviderConfigs)) 50 c.ProviderConfigs = append(c.ProviderConfigs, c1.ProviderConfigs...) 51 c.ProviderConfigs = append(c.ProviderConfigs, c2.ProviderConfigs...) 52 } 53 54 if len(c1.Resources) > 0 || len(c2.Resources) > 0 { 55 c.Resources = make( 56 []*Resource, 57 0, len(c1.Resources)+len(c2.Resources)) 58 c.Resources = append(c.Resources, c1.Resources...) 59 c.Resources = append(c.Resources, c2.Resources...) 60 } 61 62 if len(c1.Variables) > 0 || len(c2.Variables) > 0 { 63 c.Variables = make( 64 []*Variable, 0, len(c1.Variables)+len(c2.Variables)) 65 c.Variables = append(c.Variables, c1.Variables...) 66 c.Variables = append(c.Variables, c2.Variables...) 67 } 68 69 return c, nil 70 }