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139 lines
2.9 KiB
139 lines
2.9 KiB
package config
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import (
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"bytes"
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"errors"
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"regexp"
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format "gopkg.in/src-d/go-git.v4/plumbing/format/config"
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)
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var (
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ErrModuleEmptyURL = errors.New("module config: empty URL")
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ErrModuleEmptyPath = errors.New("module config: empty path")
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ErrModuleBadPath = errors.New("submodule has an invalid path")
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)
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var (
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// Matches module paths with dotdot ".." components.
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dotdotPath = regexp.MustCompile(`(^|[/\\])\.\.([/\\]|$)`)
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)
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// Modules defines the submodules properties, represents a .gitmodules file
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// https://www.kernel.org/pub/software/scm/git/docs/gitmodules.html
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type Modules struct {
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// Submodules is a map of submodules being the key the name of the submodule.
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Submodules map[string]*Submodule
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raw *format.Config
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}
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// NewModules returns a new empty Modules
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func NewModules() *Modules {
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return &Modules{
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Submodules: make(map[string]*Submodule),
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raw: format.New(),
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}
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}
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const (
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pathKey = "path"
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branchKey = "branch"
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)
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// Unmarshal parses a git-config file and stores it.
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func (m *Modules) Unmarshal(b []byte) error {
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r := bytes.NewBuffer(b)
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d := format.NewDecoder(r)
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m.raw = format.New()
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if err := d.Decode(m.raw); err != nil {
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return err
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}
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unmarshalSubmodules(m.raw, m.Submodules)
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return nil
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}
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// Marshal returns Modules encoded as a git-config file.
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func (m *Modules) Marshal() ([]byte, error) {
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s := m.raw.Section(submoduleSection)
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s.Subsections = make(format.Subsections, len(m.Submodules))
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var i int
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for _, r := range m.Submodules {
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s.Subsections[i] = r.marshal()
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i++
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}
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buf := bytes.NewBuffer(nil)
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if err := format.NewEncoder(buf).Encode(m.raw); err != nil {
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return nil, err
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}
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return buf.Bytes(), nil
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}
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// Submodule defines a submodule.
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type Submodule struct {
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// Name module name
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Name string
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// Path defines the path, relative to the top-level directory of the Git
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// working tree.
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Path string
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// URL defines a URL from which the submodule repository can be cloned.
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URL string
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// Branch is a remote branch name for tracking updates in the upstream
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// submodule. Optional value.
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Branch string
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// raw representation of the subsection, filled by marshal or unmarshal are
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// called.
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raw *format.Subsection
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}
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// Validate validates the fields and sets the default values.
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func (m *Submodule) Validate() error {
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if m.Path == "" {
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return ErrModuleEmptyPath
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}
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if m.URL == "" {
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return ErrModuleEmptyURL
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}
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if dotdotPath.MatchString(m.Path) {
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return ErrModuleBadPath
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}
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return nil
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}
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func (m *Submodule) unmarshal(s *format.Subsection) {
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m.raw = s
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m.Name = m.raw.Name
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m.Path = m.raw.Option(pathKey)
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m.URL = m.raw.Option(urlKey)
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m.Branch = m.raw.Option(branchKey)
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}
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func (m *Submodule) marshal() *format.Subsection {
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if m.raw == nil {
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m.raw = &format.Subsection{}
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}
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m.raw.Name = m.Name
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if m.raw.Name == "" {
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m.raw.Name = m.Path
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}
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m.raw.SetOption(pathKey, m.Path)
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m.raw.SetOption(urlKey, m.URL)
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if m.Branch != "" {
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m.raw.SetOption(branchKey, m.Branch)
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}
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return m.raw
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}
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