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// Package repository contains helper methods for working with a Git repo.
package repository
import (
"bytes"
"errors"
"strings"
"github.com/MichaelMure/git-bug/util/git"
"github.com/MichaelMure/git-bug/util/lamport"
)
var (
ErrNoConfigEntry = errors.New("no config entry for the given key")
ErrMultipleConfigEntry = errors.New("multiple config entry for the given key")
)
// RepoConfig access the configuration of a repository
type RepoConfig interface {
// LocalConfig give access to the repository scoped configuration
LocalConfig() Config
// GlobalConfig give access to the git global configuration
GlobalConfig() Config
}
// RepoCommon represent the common function the we want all the repo to implement
type RepoCommon interface {
// GetPath returns the path to the repo.
GetPath() string
// GetUserName returns the name the the user has used to configure git
GetUserName() (string, error)
// GetUserEmail returns the email address that the user has used to configure git.
GetUserEmail() (string, error)
// GetCoreEditor returns the name of the editor that the user has used to configure git.
GetCoreEditor() (string, error)
// GetRemotes returns the configured remotes repositories.
GetRemotes() (map[string]string, error)
}
// Repo represents a source code repository.
type Repo interface {
RepoConfig
RepoCommon
// FetchRefs fetch git refs from a remote
FetchRefs(remote string, refSpec string) (string, error)
// PushRefs push git refs to a remote
PushRefs(remote string, refSpec string) (string, error)
// StoreData will store arbitrary data and return the corresponding hash
StoreData(data []byte) (git.Hash, error)
// ReadData will attempt to read arbitrary data from the given hash
ReadData(hash git.Hash) ([]byte, error)
// StoreTree will store a mapping key-->Hash as a Git tree
StoreTree(mapping []TreeEntry) (git.Hash, error)
// StoreCommit will store a Git commit with the given Git tree
StoreCommit(treeHash git.Hash) (git.Hash, error)
// StoreCommit will store a Git commit with the given Git tree
StoreCommitWithParent(treeHash git.Hash, parent git.Hash) (git.Hash, error)
// UpdateRef will create or update a Git reference
UpdateRef(ref string, hash git.Hash) error
// ListRefs will return a list of Git ref matching the given refspec
ListRefs(refspec string) ([]string, error)
// RefExist will check if a reference exist in Git
RefExist(ref string) (bool, error)
// CopyRef will create a new reference with the same value as another one
CopyRef(source string, dest string) error
// ListCommits will return the list of tree hashes of a ref, in chronological order
ListCommits(ref string) ([]git.Hash, error)
// ListEntries will return the list of entries in a Git tree
ListEntries(hash git.Hash) ([]TreeEntry, error)
// FindCommonAncestor will return the last common ancestor of two chain of commit
FindCommonAncestor(hash1 git.Hash, hash2 git.Hash) (git.Hash, error)
// GetTreeHash return the git tree hash referenced in a commit
GetTreeHash(commit git.Hash) (git.Hash, error)
}
// ClockedRepo is a Repo that also has Lamport clocks
type ClockedRepo interface {
Repo
// LoadClocks read the clocks values from the on-disk repo
LoadClocks() error
// WriteClocks write the clocks values into the repo
WriteClocks() error
// CreateTime return the current value of the creation clock
CreateTime() lamport.Time
// CreateTimeIncrement increment the creation clock and return the new value.
CreateTimeIncrement() (lamport.Time, error)
// EditTime return the current value of the edit clock
EditTime() lamport.Time
// EditTimeIncrement increment the edit clock and return the new value.
EditTimeIncrement() (lamport.Time, error)
// WitnessCreate witness another create time and increment the corresponding
// clock if needed.
WitnessCreate(time lamport.Time) error
// WitnessEdit witness another edition time and increment the corresponding
// clock if needed.
WitnessEdit(time lamport.Time) error
}
// Witnesser is a function that will initialize the clocks of a repo
// from scratch
type Witnesser func(repo ClockedRepo) error
func prepareTreeEntries(entries []TreeEntry) bytes.Buffer {
var buffer bytes.Buffer
for _, entry := range entries {
buffer.WriteString(entry.Format())
}
return buffer
}
func readTreeEntries(s string) ([]TreeEntry, error) {
split := strings.Split(strings.TrimSpace(s), "\n")
casted := make([]TreeEntry, len(split))
for i, line := range split {
if line == "" {
continue
}
entry, err := ParseTreeEntry(line)
if err != nil {
return nil, err
}
casted[i] = entry
}
return casted, nil
}
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