func Log(c *cli.Context) {
db := util.OpenDB()
defer db.Close()
yellow := ansi.ColorFunc("yellow+h:black")
// Perform operations in a read-only lock
db.View(func(tx *bolt.Tx) error {
info := tx.Bucket(util.INFO)
objects := tx.Bucket(util.OBJECTS)
headsBytes := info.Get(util.HEADS)
if headsBytes != nil {
queue := types.DeserializeHashes(headsBytes)
// TODO: Keep a visited set, so we don't repeat commits
for len(queue) > 0 {
i := GetNewestCommit(objects, queue)
// Get commit and remove it from the priority queue
commitSha := queue[i]
commit := types.DeserializeCommitObject(objects.Get(commitSha))
queue = append(queue[:i], queue[i+1:]...)
fmt.Printf(yellow("commit %s\n"), commitSha)
fmt.Printf("Message: %s\n", commit.Message)
fmt.Printf("Author: %s\n", commit.Author)
fmt.Printf("Date: %s\n", commit.Time)
if len(commit.Parents) > 0 {
fmt.Printf("Parents: %s\n", commit.Parents)
}
fmt.Printf("Tree: %s\n", commit.Tree)
fmt.Println()
// Append parents of this commit to the queue
queue = append(queue, commit.Parents...)
}
return nil
}
fmt.Println("There are no commits in this repository...")
return nil
})
}
// Commit implements `got commit`
func Commit(c *cli.Context) {
db := util.OpenDB()
defer db.Close()
if len(c.String("message")) == 0 {
log.Fatalln("Must supply a commit message.")
}
if len(c.String("author")) == 0 {
log.Fatalln("Must supply a commit author.")
}
// Perform operations in a write lock
err := db.Update(func(tx *bolt.Tx) error {
info := tx.Bucket(util.INFO) // The bucket holding repositry metadata
objects := tx.Bucket(util.OBJECTS) // The bucket holding got objects
current := info.Get(util.CURRENT)
// Create a commit object from the current directory snapshot
util.DebugLog("Taking snapshot of repo...")
hash := TakeSnapshot(tx.Bucket(util.OBJECTS), ".")
util.DebugLog("Repo snapshot has hash " + hash.String() + ".")
commit := types.CommitObject{
Author: c.String("author"),
Message: c.String("message"),
Time: time.Now(),
Tree: hash,
Parents: make([]types.Hash, 0),
}
// There is a 'current' commit, then it is the parent of the new commit
if current != nil {
commit.Parents = append(commit.Parents, current)
}
commitBytes := commit.Serialize()
commitSha := types.CalculateHash(commitBytes)
objects.Put(commitSha, commitBytes)
util.DebugLog("Created commit of sha " + commitSha.String() + ".")
// CURRENT now corresponds to the commit that we just created
info.Put(util.CURRENT, commitSha)
// Update heads
headsBytes := info.Get(util.HEADS)
if headsBytes != nil {
heads := types.DeserializeHashes(headsBytes)
util.DebugLog("Currently " + strconv.Itoa(len(heads)) + " heads in this repo...")
// Remove current, if it is a head
for i, head := range heads {
if head.Equal(current) {
heads = append(heads[:i], heads[i+1:]...)
break
}
}
// Add the new commit as a head
heads = append(heads, commitSha)
info.Put(util.HEADS, types.SerializeHashes(heads))
} else {
util.DebugLog("Currently no heads in this repo. Putting HEADS: " + fmt.Sprint(([]types.Hash{commitSha})))
info.Put(util.HEADS, types.SerializeHashes([]types.Hash{commitSha}))
}
return nil
})
if err != nil {
log.Fatal("Error reading from the database.")
}
}
