github.com/greysond/terraform@v0.8.5-0.20170124173113-439b5507bbe9/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 25 for _, k := range c2.unknownKeys { 26 _, present := unknowns[k] 27 if !present { 28 unknowns[k] = struct{}{} 29 c.unknownKeys = append(c.unknownKeys, k) 30 } 31 } 32 33 c.Atlas = c1.Atlas 34 if c2.Atlas != nil { 35 c.Atlas = c2.Atlas 36 } 37 38 c.Terraform = c1.Terraform 39 if c2.Terraform != nil { 40 c.Terraform = c2.Terraform 41 } 42 43 if len(c1.Modules) > 0 || len(c2.Modules) > 0 { 44 c.Modules = make( 45 []*Module, 0, len(c1.Modules)+len(c2.Modules)) 46 c.Modules = append(c.Modules, c1.Modules...) 47 c.Modules = append(c.Modules, c2.Modules...) 48 } 49 50 if len(c1.Outputs) > 0 || len(c2.Outputs) > 0 { 51 c.Outputs = make( 52 []*Output, 0, len(c1.Outputs)+len(c2.Outputs)) 53 c.Outputs = append(c.Outputs, c1.Outputs...) 54 c.Outputs = append(c.Outputs, c2.Outputs...) 55 } 56 57 if len(c1.ProviderConfigs) > 0 || len(c2.ProviderConfigs) > 0 { 58 c.ProviderConfigs = make( 59 []*ProviderConfig, 60 0, len(c1.ProviderConfigs)+len(c2.ProviderConfigs)) 61 c.ProviderConfigs = append(c.ProviderConfigs, c1.ProviderConfigs...) 62 c.ProviderConfigs = append(c.ProviderConfigs, c2.ProviderConfigs...) 63 } 64 65 if len(c1.Resources) > 0 || len(c2.Resources) > 0 { 66 c.Resources = make( 67 []*Resource, 68 0, len(c1.Resources)+len(c2.Resources)) 69 c.Resources = append(c.Resources, c1.Resources...) 70 c.Resources = append(c.Resources, c2.Resources...) 71 } 72 73 if len(c1.Variables) > 0 || len(c2.Variables) > 0 { 74 c.Variables = make( 75 []*Variable, 0, len(c1.Variables)+len(c2.Variables)) 76 c.Variables = append(c.Variables, c1.Variables...) 77 c.Variables = append(c.Variables, c2.Variables...) 78 } 79 80 return c, nil 81 }