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// Copyright 2015 The Gogs Authors. All rights reserved.
// Copyright 2019 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package git
import (
"io"
"sort"
"strings"
"gopkg.in/src-d/go-git.v4/plumbing"
"gopkg.in/src-d/go-git.v4/plumbing/filemode"
"gopkg.in/src-d/go-git.v4/plumbing/object"
)
// EntryMode the type of the object in the git tree
type EntryMode int
// There are only a few file modes in Git. They look like unix file modes, but they can only be
// one of these.
const (
// EntryModeBlob
EntryModeBlob EntryMode = 0100644
// EntryModeExec
EntryModeExec EntryMode = 0100755
// EntryModeSymlink
EntryModeSymlink EntryMode = 0120000
// EntryModeCommit
EntryModeCommit EntryMode = 0160000
// EntryModeTree
EntryModeTree EntryMode = 0040000
)
// TreeEntry the leaf in the git tree
type TreeEntry struct {
ID SHA1
gogitTreeEntry *object.TreeEntry
ptree *Tree
size int64
sized bool
fullName string
}
// Name returns the name of the entry
func (te *TreeEntry) Name() string {
if te.fullName != "" {
return te.fullName
}
return te.gogitTreeEntry.Name
}
// Mode returns the mode of the entry
func (te *TreeEntry) Mode() EntryMode {
return EntryMode(te.gogitTreeEntry.Mode)
}
// Type returns the type of the entry (commit, tree, blob)
func (te *TreeEntry) Type() string {
switch te.Mode() {
case EntryModeCommit:
return "commit"
case EntryModeTree:
return "tree"
default:
return "blob"
}
}
// Size returns the size of the entry
func (te *TreeEntry) Size() int64 {
if te.IsDir() {
return 0
} else if te.sized {
return te.size
}
file, err := te.ptree.gogitTree.TreeEntryFile(te.gogitTreeEntry)
if err != nil {
return 0
}
te.sized = true
te.size = file.Size
return te.size
}
// IsSubModule if the entry is a sub module
func (te *TreeEntry) IsSubModule() bool {
return te.gogitTreeEntry.Mode == filemode.Submodule
}
// IsDir if the entry is a sub dir
func (te *TreeEntry) IsDir() bool {
return te.gogitTreeEntry.Mode == filemode.Dir
}
// IsLink if the entry is a symlink
func (te *TreeEntry) IsLink() bool {
return te.gogitTreeEntry.Mode == filemode.Symlink
}
// IsRegular if the entry is a regular file
func (te *TreeEntry) IsRegular() bool {
return te.gogitTreeEntry.Mode == filemode.Regular
}
// IsExecutable if the entry is an executable file (not necessarily binary)
func (te *TreeEntry) IsExecutable() bool {
return te.gogitTreeEntry.Mode == filemode.Executable
}
// Blob returns the blob object the entry
func (te *TreeEntry) Blob() *Blob {
encodedObj, err := te.ptree.repo.gogitRepo.Storer.EncodedObject(plumbing.AnyObject, te.gogitTreeEntry.Hash)
if err != nil {
return nil
}
return &Blob{
ID: te.gogitTreeEntry.Hash,
gogitEncodedObj: encodedObj,
name: te.Name(),
}
}
// FollowLink returns the entry pointed to by a symlink
func (te *TreeEntry) FollowLink() (*TreeEntry, error) {
if !te.IsLink() {
return nil, ErrBadLink{te.Name(), "not a symlink"}
}
// read the link
r, err := te.Blob().DataAsync()
if err != nil {
return nil, err
}
defer r.Close()
buf := make([]byte, te.Size())
_, err = io.ReadFull(r, buf)
if err != nil {
return nil, err
}
lnk := string(buf)
t := te.ptree
// traverse up directories
for ; t != nil && strings.HasPrefix(lnk, "../"); lnk = lnk[3:] {
t = t.ptree
}
if t == nil {
return nil, ErrBadLink{te.Name(), "points outside of repo"}
}
target, err := t.GetTreeEntryByPath(lnk)
if err != nil {
if IsErrNotExist(err) {
return nil, ErrBadLink{te.Name(), "broken link"}
}
return nil, err
}
return target, nil
}
// GetSubJumpablePathName return the full path of subdirectory jumpable ( contains only one directory )
func (te *TreeEntry) GetSubJumpablePathName() string {
if te.IsSubModule() || !te.IsDir() {
return ""
}
tree, err := te.ptree.SubTree(te.Name())
if err != nil {
return te.Name()
}
entries, _ := tree.ListEntries()
if len(entries) == 1 && entries[0].IsDir() {
name := entries[0].GetSubJumpablePathName()
if name != "" {
return te.Name() + "/" + name
}
}
return te.Name()
}
// Entries a list of entry
type Entries []*TreeEntry
type customSortableEntries struct {
Comparer func(s1, s2 string) bool
Entries
}
var sorter = []func(t1, t2 *TreeEntry, cmp func(s1, s2 string) bool) bool{
func(t1, t2 *TreeEntry, cmp func(s1, s2 string) bool) bool {
return (t1.IsDir() || t1.IsSubModule()) && !t2.IsDir() && !t2.IsSubModule()
},
func(t1, t2 *TreeEntry, cmp func(s1, s2 string) bool) bool {
return cmp(t1.Name(), t2.Name())
},
}
func (ctes customSortableEntries) Len() int { return len(ctes.Entries) }
func (ctes customSortableEntries) Swap(i, j int) {
ctes.Entries[i], ctes.Entries[j] = ctes.Entries[j], ctes.Entries[i]
}
func (ctes customSortableEntries) Less(i, j int) bool {
t1, t2 := ctes.Entries[i], ctes.Entries[j]
var k int
for k = 0; k < len(sorter)-1; k++ {
s := sorter[k]
switch {
case s(t1, t2, ctes.Comparer):
return true
case s(t2, t1, ctes.Comparer):
return false
}
}
return sorter[k](t1, t2, ctes.Comparer)
}
// Sort sort the list of entry
func (tes Entries) Sort() {
sort.Sort(customSortableEntries{func(s1, s2 string) bool {
return s1 < s2
}, tes})
}
// CustomSort customizable string comparing sort entry list
func (tes Entries) CustomSort(cmp func(s1, s2 string) bool) {
sort.Sort(customSortableEntries{cmp, tes})
}
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