4 files changed, 754 insertions, 0 deletions
diff --git a/vendor/gopkg.in/src-d/go-git.v4/config/branch.go b/vendor/gopkg.in/src-d/go-git.v4/config/branch.go
new file mode 100644
index 0000000000..e18073c968
--- /dev/null
+++ b/vendor/gopkg.in/src-d/go-git.v4/config/branch.go
@@ -0,0 +1,71 @@
+package config
+
+import (
+	"errors"
+
+	"gopkg.in/src-d/go-git.v4/plumbing"
+	format "gopkg.in/src-d/go-git.v4/plumbing/format/config"
+)
+
+var (
+	errBranchEmptyName    = errors.New("branch config: empty name")
+	errBranchInvalidMerge = errors.New("branch config: invalid merge")
+)
+
+// Branch contains information on the
+// local branches and which remote to track
+type Branch struct {
+	// Name of branch
+	Name string
+	// Remote name of remote to track
+	Remote string
+	// Merge is the local refspec for the branch
+	Merge plumbing.ReferenceName
+
+	raw *format.Subsection
+}
+
+// Validate validates fields of branch
+func (b *Branch) Validate() error {
+	if b.Name == "" {
+		return errBranchEmptyName
+	}
+
+	if b.Merge != "" && !b.Merge.IsBranch() {
+		return errBranchInvalidMerge
+	}
+
+	return nil
+}
+
+func (b *Branch) marshal() *format.Subsection {
+	if b.raw == nil {
+		b.raw = &format.Subsection{}
+	}
+
+	b.raw.Name = b.Name
+
+	if b.Remote == "" {
+		b.raw.RemoveOption(remoteSection)
+	} else {
+		b.raw.SetOption(remoteSection, b.Remote)
+	}
+
+	if b.Merge == "" {
+		b.raw.RemoveOption(mergeKey)
+	} else {
+		b.raw.SetOption(mergeKey, string(b.Merge))
+	}
+
+	return b.raw
+}
+
+func (b *Branch) unmarshal(s *format.Subsection) error {
+	b.raw = s
+
+	b.Name = b.raw.Name
+	b.Remote = b.raw.Options.Get(remoteSection)
+	b.Merge = plumbing.ReferenceName(b.raw.Options.Get(mergeKey))
+
+	return b.Validate()
+}
diff --git a/vendor/gopkg.in/src-d/go-git.v4/config/config.go b/vendor/gopkg.in/src-d/go-git.v4/config/config.go
new file mode 100644
index 0000000000..a637f6d709
--- /dev/null
+++ b/vendor/gopkg.in/src-d/go-git.v4/config/config.go
@@ -0,0 +1,401 @@
+// Package config contains the abstraction of multiple config files
+package config
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"sort"
+	"strconv"
+
+	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 key in remote or branch")
+	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 struct {
+		// IsBare if true this repository is assumed to be bare and has no
+		// working directory associated with it.
+		IsBare bool
+		// Worktree is the path to the root of the working tree.
+		Worktree string
+		// CommentChar is the character indicating the start of a
+		// comment for commands like commit and tag
+		CommentChar string
+	}
+
+	Pack struct {
+		// Window controls the size of the sliding window for delta
+		// compression.  The default is 10.  A value of 0 turns off
+		// delta compression entirely.
+		Window uint
+	}
+
+	// Remotes list of repository remotes, the key of the map is the name
+	// of the remote, should equal to RemoteConfig.Name.
+	Remotes map[string]*RemoteConfig
+	// Submodules list of repository submodules, the key of the map is the name
+	// of the submodule, should equal to Submodule.Name.
+	Submodules map[string]*Submodule
+	// Branches list of branches, the key is the branch name and should
+	// equal Branch.Name
+	Branches map[string]*Branch
+	// Raw contains the raw information of a config file. The main goal is
+	// preserve the parsed information from the original format, to avoid
+	// dropping unsupported fields.
+	Raw *format.Config
+}
+
+// NewConfig returns a new empty Config.
+func NewConfig() *Config {
+	config := &Config{
+		Remotes:    make(map[string]*RemoteConfig),
+		Submodules: make(map[string]*Submodule),
+		Branches:   make(map[string]*Branch),
+		Raw:        format.New(),
+	}
+
+	config.Pack.Window = DefaultPackWindow
+
+	return config
+}
+
+// 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
+		}
+	}
+
+	for name, b := range c.Branches {
+		if b.Name != name {
+			return ErrInvalid
+		}
+
+		if err := b.Validate(); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+const (
+	remoteSection    = "remote"
+	submoduleSection = "submodule"
+	branchSection    = "branch"
+	coreSection      = "core"
+	packSection      = "pack"
+	fetchKey         = "fetch"
+	urlKey           = "url"
+	bareKey          = "bare"
+	worktreeKey      = "worktree"
+	commentCharKey   = "commentChar"
+	windowKey        = "window"
+	mergeKey         = "merge"
+
+	// DefaultPackWindow holds the number of previous objects used to
+	// generate deltas. The value 10 is the same used by git command.
+	DefaultPackWindow = uint(10)
+)
+
+// 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()
+	if err := c.unmarshalPack(); err != nil {
+		return err
+	}
+	unmarshalSubmodules(c.Raw, c.Submodules)
+
+	if err := c.unmarshalBranches(); err != nil {
+		return err
+	}
+
+	return c.unmarshalRemotes()
+}
+
+func (c *Config) unmarshalCore() {
+	s := c.Raw.Section(coreSection)
+	if s.Options.Get(bareKey) == "true" {
+		c.Core.IsBare = true
+	}
+
+	c.Core.Worktree = s.Options.Get(worktreeKey)
+	c.Core.CommentChar = s.Options.Get(commentCharKey)
+}
+
+func (c *Config) unmarshalPack() error {
+	s := c.Raw.Section(packSection)
+	window := s.Options.Get(windowKey)
+	if window == "" {
+		c.Pack.Window = DefaultPackWindow
+	} else {
+		winUint, err := strconv.ParseUint(window, 10, 32)
+		if err != nil {
+			return err
+		}
+		c.Pack.Window = uint(winUint)
+	}
+	return nil
+}
+
+func (c *Config) unmarshalRemotes() error {
+	s := c.Raw.Section(remoteSection)
+	for _, sub := range s.Subsections {
+		r := &RemoteConfig{}
+		if err := r.unmarshal(sub); err != nil {
+			return err
+		}
+
+		c.Remotes[r.Name] = r
+	}
+
+	return nil
+}
+
+func unmarshalSubmodules(fc *format.Config, submodules map[string]*Submodule) {
+	s := fc.Section(submoduleSection)
+	for _, sub := range s.Subsections {
+		m := &Submodule{}
+		m.unmarshal(sub)
+
+		if m.Validate() == ErrModuleBadPath {
+			continue
+		}
+
+		submodules[m.Name] = m
+	}
+}
+
+func (c *Config) unmarshalBranches() error {
+	bs := c.Raw.Section(branchSection)
+	for _, sub := range bs.Subsections {
+		b := &Branch{}
+
+		if err := b.unmarshal(sub); err != nil {
+			return err
+		}
+
+		c.Branches[b.Name] = b
+	}
+	return nil
+}
+
+// Marshal returns Config encoded as a git-config file.
+func (c *Config) Marshal() ([]byte, error) {
+	c.marshalCore()
+	c.marshalPack()
+	c.marshalRemotes()
+	c.marshalSubmodules()
+	c.marshalBranches()
+
+	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))
+
+	if c.Core.Worktree != "" {
+		s.SetOption(worktreeKey, c.Core.Worktree)
+	}
+}
+
+func (c *Config) marshalPack() {
+	s := c.Raw.Section(packSection)
+	if c.Pack.Window != DefaultPackWindow {
+		s.SetOption(windowKey, fmt.Sprintf("%d", c.Pack.Window))
+	}
+}
+
+func (c *Config) marshalRemotes() {
+	s := c.Raw.Section(remoteSection)
+	newSubsections := make(format.Subsections, 0, len(c.Remotes))
+	added := make(map[string]bool)
+	for _, subsection := range s.Subsections {
+		if remote, ok := c.Remotes[subsection.Name]; ok {
+			newSubsections = append(newSubsections, remote.marshal())
+			added[subsection.Name] = true
+		}
+	}
+
+	remoteNames := make([]string, 0, len(c.Remotes))
+	for name := range c.Remotes {
+		remoteNames = append(remoteNames, name)
+	}
+
+	sort.Strings(remoteNames)
+
+	for _, name := range remoteNames {
+		if !added[name] {
+			newSubsections = append(newSubsections, c.Remotes[name].marshal())
+		}
+	}
+
+	s.Subsections = newSubsections
+}
+
+func (c *Config) marshalSubmodules() {
+	s := c.Raw.Section(submoduleSection)
+	s.Subsections = make(format.Subsections, len(c.Submodules))
+
+	var i int
+	for _, r := range c.Submodules {
+		section := r.marshal()
+		// the submodule section at config is a subset of the .gitmodule file
+		// we should remove the non-valid options for the config file.
+		section.RemoveOption(pathKey)
+		s.Subsections[i] = section
+		i++
+	}
+}
+
+func (c *Config) marshalBranches() {
+	s := c.Raw.Section(branchSection)
+	newSubsections := make(format.Subsections, 0, len(c.Branches))
+	added := make(map[string]bool)
+	for _, subsection := range s.Subsections {
+		if branch, ok := c.Branches[subsection.Name]; ok {
+			newSubsections = append(newSubsections, branch.marshal())
+			added[subsection.Name] = true
+		}
+	}
+
+	branchNames := make([]string, 0, len(c.Branches))
+	for name := range c.Branches {
+		branchNames = append(branchNames, name)
+	}
+
+	sort.Strings(branchNames)
+
+	for _, name := range branchNames {
+		if !added[name] {
+			newSubsections = append(newSubsections, c.Branches[name].marshal())
+		}
+	}
+
+	s.Subsections = newSubsections
+}
+
+// RemoteConfig contains the configuration for a given remote repository.
+type RemoteConfig struct {
+	// Name of the remote
+	Name string
+	// URLs the URLs of a remote repository. It must be non-empty. Fetch will
+	// always use the first URL, while push will use all of them.
+	URLs []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 len(c.URLs) == 0 {
+		return ErrRemoteConfigEmptyURL
+	}
+
+	for _, r := range c.Fetch {
+		if err := r.Validate(); err != nil {
+			return err
+		}
+	}
+
+	if len(c.Fetch) == 0 {
+		c.Fetch = []RefSpec{RefSpec(fmt.Sprintf(DefaultFetchRefSpec, c.Name))}
+	}
+
+	return nil
+}
+
+func (c *RemoteConfig) unmarshal(s *format.Subsection) error {
+	c.raw = s
+
+	fetch := []RefSpec{}
+	for _, f := range c.raw.Options.GetAll(fetchKey) {
+		rs := RefSpec(f)
+		if err := rs.Validate(); err != nil {
+			return err
+		}
+
+		fetch = append(fetch, rs)
+	}
+
+	c.Name = c.raw.Name
+	c.URLs = append([]string(nil), c.raw.Options.GetAll(urlKey)...)
+	c.Fetch = fetch
+
+	return nil
+}
+
+func (c *RemoteConfig) marshal() *format.Subsection {
+	if c.raw == nil {
+		c.raw = &format.Subsection{}
+	}
+
+	c.raw.Name = c.Name
+	if len(c.URLs) == 0 {
+		c.raw.RemoveOption(urlKey)
+	} else {
+		c.raw.SetOption(urlKey, c.URLs...)
+	}
+
+	if len(c.Fetch) == 0 {
+		c.raw.RemoveOption(fetchKey)
+	} else {
+		var values []string
+		for _, rs := range c.Fetch {
+			values = append(values, rs.String())
+		}
+
+		c.raw.SetOption(fetchKey, values...)
+	}
+
+	return c.raw
+}
diff --git a/vendor/gopkg.in/src-d/go-git.v4/config/modules.go b/vendor/gopkg.in/src-d/go-git.v4/config/modules.go
new file mode 100644
index 0000000000..90758d9327
--- /dev/null
+++ b/vendor/gopkg.in/src-d/go-git.v4/config/modules.go
@@ -0,0 +1,139 @@
+package config
+
+import (
+	"bytes"
+	"errors"
+	"regexp"
+
+	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")
+	ErrModuleBadPath   = errors.New("submodule has an invalid path")
+)
+
+var (
+	// Matches module paths with dotdot ".." components.
+	dotdotPath = regexp.MustCompile(`(^|[/\\])\.\.([/\\]|$)`)
+)
+
+// 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),
+		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
+	}
+
+	unmarshalSubmodules(m.raw, m.Submodules)
+	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
+	}
+
+	if dotdotPath.MatchString(m.Path) {
+		return ErrModuleBadPath
+	}
+
+	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
+}
diff --git a/vendor/gopkg.in/src-d/go-git.v4/config/refspec.go b/vendor/gopkg.in/src-d/go-git.v4/config/refspec.go
new file mode 100644
index 0000000000..391705cccc
--- /dev/null
+++ b/vendor/gopkg.in/src-d/go-git.v4/config/refspec.go
@@ -0,0 +1,143 @@
+package config
+
+import (
+	"errors"
+	"strings"
+
+	"gopkg.in/src-d/go-git.v4/plumbing"
+)
+
+const (
+	refSpecWildcard  = "*"
+	refSpecForce     = "+"
+	refSpecSeparator = ":"
+)
+
+var (
+	ErrRefSpecMalformedSeparator = errors.New("malformed refspec, separators are wrong")
+	ErrRefSpecMalformedWildcard  = errors.New("malformed refspec, mismatched number of wildcards")
+)
+
+// RefSpec is a mapping from local branches to remote references
+// The format of the refspec is an optional +, followed by <src>:<dst>, where
+// <src> is the pattern for references on the remote side and <dst> is where
+// those references will be written locally. The + tells Git to update the
+// reference even if it isn’t a fast-forward.
+// eg.: "+refs/heads/*:refs/remotes/origin/*"
+//
+// https://git-scm.com/book/es/v2/Git-Internals-The-Refspec
+type RefSpec string
+
+// Validate validates the RefSpec
+func (s RefSpec) Validate() error {
+	spec := string(s)
+	if strings.Count(spec, refSpecSeparator) != 1 {
+		return ErrRefSpecMalformedSeparator
+	}
+
+	sep := strings.Index(spec, refSpecSeparator)
+	if sep == len(spec)-1 {
+		return ErrRefSpecMalformedSeparator
+	}
+
+	ws := strings.Count(spec[0:sep], refSpecWildcard)
+	wd := strings.Count(spec[sep+1:], refSpecWildcard)
+	if ws == wd && ws < 2 && wd < 2 {
+		return nil
+	}
+
+	return ErrRefSpecMalformedWildcard
+}
+
+// IsForceUpdate returns if update is allowed in non fast-forward merges.
+func (s RefSpec) IsForceUpdate() bool {
+	return s[0] == refSpecForce[0]
+}
+
+// IsDelete returns true if the refspec indicates a delete (empty src).
+func (s RefSpec) IsDelete() bool {
+	return s[0] == refSpecSeparator[0]
+}
+
+// Src return the src side.
+func (s RefSpec) Src() string {
+	spec := string(s)
+
+	var start int
+	if s.IsForceUpdate() {
+		start = 1
+	} else {
+		start = 0
+	}
+	end := strings.Index(spec, refSpecSeparator)
+
+	return spec[start:end]
+}
+
+// Match match the given plumbing.ReferenceName against the source.
+func (s RefSpec) Match(n plumbing.ReferenceName) bool {
+	if !s.IsWildcard() {
+		return s.matchExact(n)
+	}
+
+	return s.matchGlob(n)
+}
+
+// IsWildcard returns true if the RefSpec contains a wildcard.
+func (s RefSpec) IsWildcard() bool {
+	return strings.Contains(string(s), refSpecWildcard)
+}
+
+func (s RefSpec) matchExact(n plumbing.ReferenceName) bool {
+	return s.Src() == n.String()
+}
+
+func (s RefSpec) matchGlob(n plumbing.ReferenceName) bool {
+	src := s.Src()
+	name := n.String()
+	wildcard := strings.Index(src, refSpecWildcard)
+
+	var prefix, suffix string
+	prefix = src[0:wildcard]
+	if len(src) < wildcard {
+		suffix = src[wildcard+1 : len(suffix)]
+	}
+
+	return len(name) > len(prefix)+len(suffix) &&
+		strings.HasPrefix(name, prefix) &&
+		strings.HasSuffix(name, suffix)
+}
+
+// Dst returns the destination for the given remote reference.
+func (s RefSpec) Dst(n plumbing.ReferenceName) plumbing.ReferenceName {
+	spec := string(s)
+	start := strings.Index(spec, refSpecSeparator) + 1
+	dst := spec[start:]
+	src := s.Src()
+
+	if !s.IsWildcard() {
+		return plumbing.ReferenceName(dst)
+	}
+
+	name := n.String()
+	ws := strings.Index(src, refSpecWildcard)
+	wd := strings.Index(dst, refSpecWildcard)
+	match := name[ws : len(name)-(len(src)-(ws+1))]
+
+	return plumbing.ReferenceName(dst[0:wd] + match + dst[wd+1:])
+}
+
+func (s RefSpec) String() string {
+	return string(s)
+}
+
+// MatchAny returns true if any of the RefSpec match with the given ReferenceName.
+func MatchAny(l []RefSpec, n plumbing.ReferenceName) bool {
+	for _, r := range l {
+		if r.Match(n) {
+			return true
+		}
+	}
+
+	return false
+}