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mod_variable_map.go
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/
mod_variable_map.go
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package modconfig
import (
"sort"
"strings"
)
// ModVariableMap is a struct containins maps of variable definitions
type ModVariableMap struct {
RootVariables map[string]*Variable
DependencyVariables map[string]map[string]*Variable
// a map of top level AND dependency variables
// used to set variable values from inputVariables
AllVariables map[string]*Variable
// the input variables evaluated in the parse
VariableValues map[string]string
}
// NewModVariableMap builds a ModVariableMap using the variables from a mod and its dependencies
func NewModVariableMap(mod *Mod, dependencyMods ModMap) *ModVariableMap {
m := &ModVariableMap{
RootVariables: make(map[string]*Variable),
DependencyVariables: make(map[string]map[string]*Variable),
VariableValues: make(map[string]string),
}
// add variables into map, modifying the key to be the variable short name
for k, v := range mod.ResourceMaps.Variables {
m.RootVariables[buildVariableMapKey(k)] = v
}
// now add variables from dependency mods
for _, mod := range dependencyMods {
// add variables into map, modifying the key to be the variable short name
m.DependencyVariables[mod.ShortName] = make(map[string]*Variable)
for k, v := range mod.ResourceMaps.Variables {
m.DependencyVariables[mod.ShortName][buildVariableMapKey(k)] = v
}
}
// build map of all variables
m.AllVariables = m.buildCombinedMap()
return m
}
// build a map of top level and dependency variables
// (dependency variables are keyed by full (qualified) name
func (m ModVariableMap) buildCombinedMap() map[string]*Variable {
res := make(map[string]*Variable)
for k, v := range m.RootVariables {
// add top level vars keyed by short name
res[k] = v
}
for _, dep := range m.DependencyVariables {
for _, v := range dep {
// add dependency vars keyed by full name
res[v.FullName] = v
}
}
return res
}
func (m ModVariableMap) ToArray() []*Variable {
var res []*Variable
if len(m.AllVariables) > 0 {
var keys []string
for k := range m.RootVariables {
keys = append(keys, k)
}
// sort keys
sort.Strings(keys)
for _, k := range keys {
res = append(res, m.RootVariables[k])
}
}
for _, depVariables := range m.DependencyVariables {
if len(depVariables) == 0 {
continue
}
keys := make([]string, len(depVariables))
idx := 0
for k := range depVariables {
keys[idx] = k
idx++
}
// sort keys
sort.Strings(keys)
for _, k := range keys {
res = append(res, depVariables[k])
}
}
return res
}
// build map key fopr root variables - they are keyed by short name
// to allow the user to set their value using the short name
func buildVariableMapKey(k string) string {
name := strings.TrimPrefix(k, "var.")
return name
}