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mirror of https://github.com/go-gitea/gitea synced 2024-11-05 01:34:25 +00:00
gitea/models/lfs.go
zeripath 5e6a008fba
Add basic repository lfs management (#7199)
This PR adds basic repository LFS management UI including the ability to find all possible pointers within the repository. Locks are not managed at present but would be addable through some simple additions.

* Add basic repository lfs management
* add auto-associate function
* Add functionality to find commits with this lfs file
* Add link to find commits on the lfs file view
* Adjust commit view to state the likely branch causing the commit
* Only read Oid from database
2019-10-28 18:31:55 +00:00

201 lines
5.7 KiB
Go

package models
import (
"crypto/sha256"
"encoding/hex"
"errors"
"fmt"
"io"
"code.gitea.io/gitea/modules/timeutil"
"xorm.io/builder"
)
// LFSMetaObject stores metadata for LFS tracked files.
type LFSMetaObject struct {
ID int64 `xorm:"pk autoincr"`
Oid string `xorm:"UNIQUE(s) INDEX NOT NULL"`
Size int64 `xorm:"NOT NULL"`
RepositoryID int64 `xorm:"UNIQUE(s) INDEX NOT NULL"`
Existing bool `xorm:"-"`
CreatedUnix timeutil.TimeStamp `xorm:"created"`
}
// Pointer returns the string representation of an LFS pointer file
func (m *LFSMetaObject) Pointer() string {
return fmt.Sprintf("%s\n%s%s\nsize %d\n", LFSMetaFileIdentifier, LFSMetaFileOidPrefix, m.Oid, m.Size)
}
// LFSTokenResponse defines the JSON structure in which the JWT token is stored.
// This structure is fetched via SSH and passed by the Git LFS client to the server
// endpoint for authorization.
type LFSTokenResponse struct {
Header map[string]string `json:"header"`
Href string `json:"href"`
}
var (
// ErrLFSObjectNotExist is returned from lfs models functions in order
// to differentiate between database and missing object errors.
ErrLFSObjectNotExist = errors.New("LFS Meta object does not exist")
)
const (
// LFSMetaFileIdentifier is the string appearing at the first line of LFS pointer files.
// https://github.com/git-lfs/git-lfs/blob/master/docs/spec.md
LFSMetaFileIdentifier = "version https://git-lfs.github.com/spec/v1"
// LFSMetaFileOidPrefix appears in LFS pointer files on a line before the sha256 hash.
LFSMetaFileOidPrefix = "oid sha256:"
)
// NewLFSMetaObject stores a given populated LFSMetaObject structure in the database
// if it is not already present.
func NewLFSMetaObject(m *LFSMetaObject) (*LFSMetaObject, error) {
var err error
sess := x.NewSession()
defer sess.Close()
if err = sess.Begin(); err != nil {
return nil, err
}
has, err := sess.Get(m)
if err != nil {
return nil, err
}
if has {
m.Existing = true
return m, sess.Commit()
}
if _, err = sess.Insert(m); err != nil {
return nil, err
}
return m, sess.Commit()
}
// GenerateLFSOid generates a Sha256Sum to represent an oid for arbitrary content
func GenerateLFSOid(content io.Reader) (string, error) {
h := sha256.New()
if _, err := io.Copy(h, content); err != nil {
return "", err
}
sum := h.Sum(nil)
return hex.EncodeToString(sum), nil
}
// GetLFSMetaObjectByOid selects a LFSMetaObject entry from database by its OID.
// It may return ErrLFSObjectNotExist or a database error. If the error is nil,
// the returned pointer is a valid LFSMetaObject.
func (repo *Repository) GetLFSMetaObjectByOid(oid string) (*LFSMetaObject, error) {
if len(oid) == 0 {
return nil, ErrLFSObjectNotExist
}
m := &LFSMetaObject{Oid: oid, RepositoryID: repo.ID}
has, err := x.Get(m)
if err != nil {
return nil, err
} else if !has {
return nil, ErrLFSObjectNotExist
}
return m, nil
}
// RemoveLFSMetaObjectByOid removes a LFSMetaObject entry from database by its OID.
// It may return ErrLFSObjectNotExist or a database error.
func (repo *Repository) RemoveLFSMetaObjectByOid(oid string) (int64, error) {
if len(oid) == 0 {
return 0, ErrLFSObjectNotExist
}
sess := x.NewSession()
defer sess.Close()
if err := sess.Begin(); err != nil {
return -1, err
}
m := &LFSMetaObject{Oid: oid, RepositoryID: repo.ID}
if _, err := sess.Delete(m); err != nil {
return -1, err
}
count, err := sess.Count(&LFSMetaObject{Oid: oid})
if err != nil {
return count, err
}
return count, sess.Commit()
}
// GetLFSMetaObjects returns all LFSMetaObjects associated with a repository
func (repo *Repository) GetLFSMetaObjects(page, pageSize int) ([]*LFSMetaObject, error) {
sess := x.NewSession()
defer sess.Close()
if page >= 0 && pageSize > 0 {
start := 0
if page > 0 {
start = (page - 1) * pageSize
}
sess.Limit(pageSize, start)
}
lfsObjects := make([]*LFSMetaObject, 0, pageSize)
return lfsObjects, sess.Find(&lfsObjects, &LFSMetaObject{RepositoryID: repo.ID})
}
// CountLFSMetaObjects returns a count of all LFSMetaObjects associated with a repository
func (repo *Repository) CountLFSMetaObjects() (int64, error) {
return x.Count(&LFSMetaObject{RepositoryID: repo.ID})
}
// LFSObjectAccessible checks if a provided Oid is accessible to the user
func LFSObjectAccessible(user *User, oid string) (bool, error) {
if user.IsAdmin {
count, err := x.Count(&LFSMetaObject{Oid: oid})
return (count > 0), err
}
cond := accessibleRepositoryCondition(user.ID)
count, err := x.Where(cond).Join("INNER", "repository", "`lfs_meta_object`.repository_id = `repository`.id").Count(&LFSMetaObject{Oid: oid})
return (count > 0), err
}
// LFSAutoAssociate auto associates accessible LFSMetaObjects
func LFSAutoAssociate(metas []*LFSMetaObject, user *User, repoID int64) error {
sess := x.NewSession()
defer sess.Close()
if err := sess.Begin(); err != nil {
return err
}
oids := make([]interface{}, len(metas))
oidMap := make(map[string]*LFSMetaObject, len(metas))
for i, meta := range metas {
oids[i] = meta.Oid
oidMap[meta.Oid] = meta
}
cond := builder.NewCond()
if !user.IsAdmin {
cond = builder.In("`lfs_meta_object`.repository_id",
builder.Select("`repository`.id").From("repository").Where(accessibleRepositoryCondition(user.ID)))
}
newMetas := make([]*LFSMetaObject, 0, len(metas))
if err := sess.Cols("oid").Where(cond).In("oid", oids...).GroupBy("oid").Find(&newMetas); err != nil {
return err
}
for i := range newMetas {
newMetas[i].Size = oidMap[newMetas[i].Oid].Size
newMetas[i].RepositoryID = repoID
}
if _, err := sess.InsertMulti(newMetas); err != nil {
return err
}
return sess.Commit()
}