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woodpecker/yaml/expander/expand.go

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package expander
import "sort"
// Expand expands variables into the Yaml configuration using a
// ${key} template parameter with limited support for bash string functions.
func Expand(config []byte, envs map[string]string) []byte {
return []byte(
ExpandString(string(config), envs),
)
}
// ExpandString injects the variables into the Yaml configuration string using
// a ${key} template parameter with limited support for bash string functions.
func ExpandString(config string, envs map[string]string) string {
if envs == nil || len(envs) == 0 {
return config
}
keys := []string{}
for k := range envs {
keys = append(keys, k)
}
sort.Sort(sort.Reverse(sort.StringSlice(keys)))
expanded := config
for _, k := range keys {
v := envs[k]
for _, substitute := range substitutors {
expanded = substitute(expanded, k, v)
}
}
return expanded
}