diff options
Diffstat (limited to 'vendor/github.com/containers/buildah/util/util.go')
| -rw-r--r-- | vendor/github.com/containers/buildah/util/util.go | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/vendor/github.com/containers/buildah/util/util.go b/vendor/github.com/containers/buildah/util/util.go index f41daa2cc..00efc8d21 100644 --- a/vendor/github.com/containers/buildah/util/util.go +++ b/vendor/github.com/containers/buildah/util/util.go @@ -469,3 +469,19 @@ func FindLocalRuntime(runtime string) string { } return localRuntime } + +// MergeEnv merges two lists of environment variables, avoiding duplicates. +func MergeEnv(defaults, overrides []string) []string { + s := make([]string, 0, len(defaults)+len(overrides)) + index := make(map[string]int) + for _, envSpec := range append(defaults, overrides...) { + envVar := strings.SplitN(envSpec, "=", 2) + if i, ok := index[envVar[0]]; ok { + s[i] = envSpec + continue + } + s = append(s, envSpec) + index[envVar[0]] = len(s) - 1 + } + return s +} |