func writeIndexEntries(repo *libgit.Repository, prefix string, entries []*GitIndexEntry) ([20]byte, error) {
content := bytes.NewBuffer(nil)
// [mode] [file/folder name]\0[SHA-1 of referencing blob or tree as [20]byte]
lastname := ""
firstIdxForTree := -1
for idx, obj := range entries {
nameBits := strings.Split(obj.PathName, "/")
// Either it's the last entry and we haven't written a tree yet, or it's not the last
// entry but the directory changed
if (nameBits[0] != lastname || idx == len(entries)-1) && lastname != "" {
var islice []*GitIndexEntry
if idx == len(entries)-1 {
islice = entries[firstIdxForTree:]
} else {
islice = entries[firstIdxForTree:idx]
}
subsha1, err := writeIndexSubtree(repo, lastname, islice)
if err != nil {
panic(err)
}
// Write the object
fmt.Fprintf(content, "%o %s\x00", 0040000, lastname)
content.Write(subsha1[:])
// Reset the data keeping track of what this tree is.
lastname = ""
firstIdxForTree = -1
}
if len(nameBits) == 1 {
//write the blob for the file portion
fmt.Fprintf(content, "%o %s\x00", obj.Mode, obj.PathName)
content.Write(obj.Sha1[:])
lastname = ""
} else {
lastname = nameBits[0]
if firstIdxForTree == -1 {
firstIdxForTree = idx
}
}
}
sha1, err := repo.StoreObjectLoose(libgit.ObjectTree, bytes.NewReader(content.Bytes()))
return [20]byte(sha1), err
}
func CommitTree(repo *libgit.Repository, args []string) string {
content := bytes.NewBuffer(nil)
var parents []string
var messageString, messageFile string
var skipNext bool
var tree string
for idx, val := range args {
if idx == 0 && val[0] != '-' {
tree = val
continue
}
if skipNext == true {
skipNext = false
continue
}
switch val {
case "-p":
parents = append(parents, args[idx+1])
skipNext = true
case "-m":
messageString += "\n" + args[idx+1] + "\n"
skipNext = true
case "-F":
messageFile = args[idx+1]
skipNext = true
}
}
if messageString == "" {
if messageFile != "" {
// TODO: READ commit message from messageFile here
} else {
// If neither messageString nor messageFile are set, read
// from STDIN
}
panic("Must provide message with -m parameter to commit-tree")
}
if tree == "" {
tree = args[len(args)-1]
}
// TODO: Validate tree id
fmt.Fprintf(content, "tree %s\n", tree)
for _, val := range parents {
fmt.Fprintf(content, "parent %s\n", val)
}
author := getAuthor(repo)
t := time.Now()
_, tzoff := t.Zone()
// for some reason t.Zone() returns the timezone offset in seconds
// instead of hours, so convert it to an hour format string
tzStr := fmt.Sprintf("%+03d00", tzoff/(60*60))
fmt.Fprintf(content, "author %s %d %s\n", author, t.Unix(), tzStr)
fmt.Fprintf(content, "committer %s %d %s\n", author, t.Unix(), tzStr)
fmt.Fprintf(content, "%s", messageString)
fmt.Printf("%s", content.Bytes())
sha1, err := repo.StoreObjectLoose(libgit.ObjectCommit, bytes.NewReader(content.Bytes()))
if err != nil {
return ""
}
return fmt.Sprintf("%s", sha1)
}
// Adds a file to the index, without writing it to disk.
// To write it to disk after calling this, use GitIndex.WriteIndex
//
// This will do the following:
// write git object blob of file contents to .git/objects
// normalize os.File name to path relative to gitRoot
// search GitIndex for normalized name
// if GitIndexEntry found
// update GitIndexEntry to point to the new object blob
// else
// add new GitIndexEntry if not found
//
func (g *GitIndex) AddFile(repo *libgit.Repository, file *os.File) {
sha1, err := repo.StoreObjectLoose(libgit.ObjectBlob, file)
if err != nil {
fmt.Fprintf(os.Stderr, "Error storing object: %s", err)
}
fmt.Printf("Sha1: %s\n", sha1)
fmt.Printf("Name is %s\n", file.Name())
name := getNormalizedName(file)
for _, entry := range g.Objects {
if entry.PathName == name {
entry.Sha1 = sha1
fstat, err := file.Stat()
if err != nil {
panic(err)
}
modTime := fstat.ModTime()
entry.Mtime = uint32(modTime.Unix())
entry.Mtimenano = uint32(modTime.Nanosecond())
entry.Fsize = uint32(fstat.Size())
return
}
}
fstat, err := file.Stat()
if err != nil {
panic(err)
}
modTime := fstat.ModTime()
stat := fstat.Sys().(*syscall.Stat_t)
csec, cnano := stat.Ctim.Unix()
var mode uint32
if fstat.IsDir() {
// This should really recursively call add for each file in the directory.
panic("Add can't handle directories. yet.")
} else {
// if it's a regular file, just assume it's 0644 for now
mode = 0x81A4
}
// mode is
/*
32-bit mode, split into (high to low bits)
4-bit object type
valid values in binary are 1000 (regular file), 1010 (symbolic link)
and 1110 (gitlink)
3-bit unused
9-bit unix permission. Only 0755 and 0644 are valid for regular files.
Symbolic links and gitlinks have value 0 in this field.
Flags is
A 16-bit 'flags' field split into (high to low bits)
1-bit assume-valid flag
1-bit extended flag (must be zero in version 2)
2-bit stage (during merge)
12-bit name length if the length is less than 0xFFF; otherwise 0xFFF
is stored in this field.
*/
//var flags uint16 = 0x8000 // start with "assume-valid" flag
var flags uint16 = 0x8000 // start with "assume-valid" flag
if len(name) >= 0x0FFF {
flags |= 0x0FFF
} else {
flags |= (uint16(len(name)) & 0x0FFF)
}
g.Objects = append(g.Objects, &GitIndexEntry{
fixedIndexEntry{
uint32(csec), // right?
uint32(cnano), // right?
uint32(modTime.Unix()), // right
uint32(modTime.Nanosecond()), // right
uint32(stat.Dev), // right
uint32(stat.Ino), // right
mode,
stat.Uid, // right?
stat.Gid, // right?
uint32(fstat.Size()), // right
sha1, // this is right
flags, // right
},
name,
})
g.NumberIndexEntries += 1
sort.Sort(ByPath(g.Objects))
return
}