| // Copyright 2018 The LUCI Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package config |
| |
| import ( |
| "strings" |
| ) |
| |
| // Set is a name of a configuration set: a bunch of config files versioned and |
| // stored as a single unit in a same repository. |
| // |
| // A config set name consists of a domain and a series of path components: |
| // domain/target/refs... |
| // |
| // - Service config sets are config sets in the "services" domain, with the |
| // service name as the target. |
| // - Project config sets are config sets in the "projects" domain. The target |
| // is the project name. |
| type Set string |
| |
| // ServiceSet returns the name of a config set for the specified service. |
| func ServiceSet(service string) Set { return Set("services/" + service) } |
| |
| // ProjectSet returns the config set for the specified project. |
| func ProjectSet(project string) Set { return RefSet(project, "") } |
| |
| // RefSet returns the config set for the specified project and ref. If ref |
| // is empty, this will equal the ProjectSet value. |
| func RefSet(project string, ref string) Set { |
| if ref == "" { |
| return Set("projects/" + project) |
| } |
| return Set(strings.Join([]string{"projects", project, ref}, "/")) |
| } |
| |
| // Split splits a Set into its domain, target, and ref components. |
| func (cs Set) Split() (domain, target, ref string) { |
| switch p := strings.SplitN(string(cs), "/", 3); len(p) { |
| case 1: |
| return p[0], "", "" |
| case 2: |
| return p[0], p[1], "" |
| default: |
| return p[0], p[1], p[2] |
| } |
| } |
| |
| // Service returns a service name for a service-rooted config set or empty |
| // string for all other sets. |
| func (cs Set) Service() string { |
| domain, target, _ := cs.Split() |
| if domain == "services" { |
| return target |
| } |
| return "" |
| } |
| |
| // Project returns a project name for a project-rooted config set or empty |
| // string for all other sets. |
| // |
| // Use ProjectAndRef if you need to get both the project name and the ref. |
| func (cs Set) Project() string { |
| domain, target, _ := cs.Split() |
| if domain == "projects" { |
| return target |
| } |
| return "" |
| } |
| |
| // Ref returns a ref component of a project-rooted config set or empty string |
| // for all other sets. |
| // |
| // Use ProjectAndRef if you need to get both the project name and the ref. |
| func (cs Set) Ref() string { |
| domain, _, ref := cs.Split() |
| if domain == "projects" { |
| return ref |
| } |
| return "" |
| } |
| |
| // ProjectAndRef splits a project-rooted config set (projects/<name>[/...]) into |
| // its project name and ref components. |
| // |
| // For example, "projects/foo/bar/baz" is a config set that belongs to project |
| // "foo". It will be parsed into ("foo", "bar/baz"). |
| // |
| // If configSet is not a project config set, empty strings will be returned. |
| func (cs Set) ProjectAndRef() (project, ref string) { |
| domain, project, ref := cs.Split() |
| if domain == "projects" { |
| return |
| } |
| return "", "" |
| } |