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package config
import (
"bytes"
"errors"
format "gopkg.in/src-d/go-git.v4/plumbing/format/config"
)
var (
ErrModuleEmptyURL = errors.New("module config: empty URL")
ErrModuleEmptyPath = errors.New("module config: empty path")
)
// Modules defines the submodules properties, represents a .gitmodules file
// https://www.kernel.org/pub/software/scm/git/docs/gitmodules.html
type Modules struct {
// Submodules is a map of submodules being the key the name of the submodule.
Submodules map[string]*Submodule
raw *format.Config
}
// NewModules returns a new empty Modules
func NewModules() *Modules {
return &Modules{
Submodules: make(map[string]*Submodule, 0),
raw: format.New(),
}
}
const (
pathKey = "path"
branchKey = "branch"
)
// Unmarshal parses a git-config file and stores it.
func (m *Modules) Unmarshal(b []byte) error {
r := bytes.NewBuffer(b)
d := format.NewDecoder(r)
m.raw = format.New()
if err := d.Decode(m.raw); err != nil {
return err
}
s := m.raw.Section(submoduleSection)
for _, sub := range s.Subsections {
mod := &Submodule{}
mod.unmarshal(sub)
m.Submodules[mod.Path] = mod
}
return nil
}
// Marshal returns Modules encoded as a git-config file.
func (m *Modules) Marshal() ([]byte, error) {
s := m.raw.Section(submoduleSection)
s.Subsections = make(format.Subsections, len(m.Submodules))
var i int
for _, r := range m.Submodules {
s.Subsections[i] = r.marshal()
i++
}
buf := bytes.NewBuffer(nil)
if err := format.NewEncoder(buf).Encode(m.raw); err != nil {
return nil, err
}
return buf.Bytes(), nil
}
// Submodule defines a submodule.
type Submodule struct {
// Name module name
Name string
// Path defines the path, relative to the top-level directory of the Git
// working tree.
Path string
// URL defines a URL from which the submodule repository can be cloned.
URL string
// Branch is a remote branch name for tracking updates in the upstream
// submodule. Optional value.
Branch string
// 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 (m *Submodule) Validate() error {
if m.Path == "" {
return ErrModuleEmptyPath
}
if m.URL == "" {
return ErrModuleEmptyURL
}
return nil
}
func (m *Submodule) unmarshal(s *format.Subsection) {
m.raw = s
m.Name = m.raw.Name
m.Path = m.raw.Option(pathKey)
m.URL = m.raw.Option(urlKey)
m.Branch = m.raw.Option(branchKey)
}
func (m *Submodule) marshal() *format.Subsection {
if m.raw == nil {
m.raw = &format.Subsection{}
}
m.raw.Name = m.Name
if m.raw.Name == "" {
m.raw.Name = m.Path
}
m.raw.SetOption(pathKey, m.Path)
m.raw.SetOption(urlKey, m.URL)
if m.Branch != "" {
m.raw.SetOption(branchKey, m.Branch)
}
return m.raw
}
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