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// Package config contains the abstraction of config files
package config
import (
"bytes"
"errors"
"fmt"
format "gopkg.in/src-d/go-git.v4/plumbing/format/config"
)
const (
// DefaultFetchRefSpec is the default refspec used for fetch.
DefaultFetchRefSpec = "+refs/heads/*:refs/remotes/%s/*"
// DefaultPushRefSpec is the default refspec used for push.
DefaultPushRefSpec = "refs/heads/*:refs/heads/*"
)
// ConfigStorer generic storage of Config object
type ConfigStorer interface {
Config() (*Config, error)
SetConfig(*Config) error
}
var (
ErrInvalid = errors.New("config invalid remote")
ErrRemoteConfigNotFound = errors.New("remote config not found")
ErrRemoteConfigEmptyURL = errors.New("remote config: empty URL")
ErrRemoteConfigEmptyName = errors.New("remote config: empty name")
)
// Config contains the repository configuration
// ftp://www.kernel.org/pub/software/scm/git/docs/git-config.html#FILES
type Config struct {
// Core variables
Core struct {
// IsBare if true this repository is assumed to be bare and has no
// working directory associated with it
IsBare bool
}
// Remote list of repository remotes
Remotes map[string]*RemoteConfig
// contains the raw information of a config file, the main goal is preserve
// the parsed information from the original format, to avoid missing
// unsupported features.
raw *format.Config
}
// NewConfig returns a new empty Config
func NewConfig() *Config {
return &Config{
Remotes: make(map[string]*RemoteConfig, 0),
raw: format.New(),
}
}
// Validate validates the fields and sets the default values
func (c *Config) Validate() error {
for name, r := range c.Remotes {
if r.Name != name {
return ErrInvalid
}
if err := r.Validate(); err != nil {
return err
}
}
return nil
}
const (
remoteSection = "remote"
coreSection = "core"
fetchKey = "fetch"
urlKey = "url"
bareKey = "bare"
)
// Unmarshal parses a git-config file and stores it
func (c *Config) Unmarshal(b []byte) error {
r := bytes.NewBuffer(b)
d := format.NewDecoder(r)
c.raw = format.New()
if err := d.Decode(c.raw); err != nil {
return err
}
c.unmarshalCore()
c.unmarshalRemotes()
return nil
}
func (c *Config) unmarshalCore() {
s := c.raw.Section(coreSection)
if s.Options.Get(bareKey) == "true" {
c.Core.IsBare = true
}
}
func (c *Config) unmarshalRemotes() {
s := c.raw.Section(remoteSection)
for _, sub := range s.Subsections {
r := &RemoteConfig{}
r.unmarshal(sub)
c.Remotes[r.Name] = r
}
}
// Marshal returns Config encoded as a git-config file
func (c *Config) Marshal() ([]byte, error) {
c.marshalCore()
c.marshalRemotes()
buf := bytes.NewBuffer(nil)
if err := format.NewEncoder(buf).Encode(c.raw); err != nil {
return nil, err
}
return buf.Bytes(), nil
}
func (c *Config) marshalCore() {
s := c.raw.Section(coreSection)
s.SetOption(bareKey, fmt.Sprintf("%t", c.Core.IsBare))
}
func (c *Config) marshalRemotes() {
s := c.raw.Section(remoteSection)
s.Subsections = make(format.Subsections, len(c.Remotes))
var i int
for _, r := range c.Remotes {
s.Subsections[i] = r.marshal()
i++
}
}
// RemoteConfig contains the configuration for a given remote repository
type RemoteConfig struct {
// Name of the remote
Name string
// URL the URL of a remote repository
URL string
// Fetch the default set of "refspec" for fetch operation
Fetch []RefSpec
// raw representation of the subsection, filled by marshal or unmarshal are
// called
raw *format.Subsection
}
// Validate validates the fields and sets the default values
func (c *RemoteConfig) Validate() error {
if c.Name == "" {
return ErrRemoteConfigEmptyName
}
if c.URL == "" {
return ErrRemoteConfigEmptyURL
}
if len(c.Fetch) == 0 {
c.Fetch = []RefSpec{RefSpec(fmt.Sprintf(DefaultFetchRefSpec, c.Name))}
}
return nil
}
func (c *RemoteConfig) unmarshal(s *format.Subsection) {
c.raw = s
fetch := []RefSpec{}
for _, f := range c.raw.Options.GetAll(fetchKey) {
rs := RefSpec(f)
if rs.IsValid() {
fetch = append(fetch, rs)
}
}
c.Name = c.raw.Name
c.URL = c.raw.Option(urlKey)
c.Fetch = fetch
}
func (c *RemoteConfig) marshal() *format.Subsection {
if c.raw == nil {
c.raw = &format.Subsection{}
}
c.raw.Name = c.Name
c.raw.SetOption(urlKey, c.URL)
for _, rs := range c.Fetch {
c.raw.SetOption(fetchKey, rs.String())
}
return c.raw
}
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