func (b *AbstractShell) cacheFile(build *common.Build, userKey string) (key, file string) {
if build.CacheDir == "" {
return
}
// Deduce cache key
key = path.Join(build.Name, build.RefName)
if userKey != "" {
key = build.GetAllVariables().ExpandValue(userKey)
}
// Ignore cache without the key
if key == "" {
return
}
file = path.Join(build.CacheDir, key, "cache.zip")
file, err := filepath.Rel(build.BuildDir, file)
if err != nil {
return "", ""
}
return
}
