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|
// 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 repo
import (
"bufio"
"fmt"
"html"
"path"
"strings"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/context"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/upload"
"code.gitea.io/gitea/services/gitdiff"
)
const (
tplCompare base.TplName = "repo/diff/compare"
tplBlobExcerpt base.TplName = "repo/diff/blob_excerpt"
)
// setPathsCompareContext sets context data for source and raw paths
func setPathsCompareContext(ctx *context.Context, base *git.Commit, head *git.Commit, headTarget string) {
sourcePath := setting.AppSubURL + "/%s/src/commit/%s"
rawPath := setting.AppSubURL + "/%s/raw/commit/%s"
ctx.Data["SourcePath"] = fmt.Sprintf(sourcePath, headTarget, head.ID)
ctx.Data["RawPath"] = fmt.Sprintf(rawPath, headTarget, head.ID)
if base != nil {
baseTarget := path.Join(ctx.Repo.Owner.Name, ctx.Repo.Repository.Name)
ctx.Data["BeforeSourcePath"] = fmt.Sprintf(sourcePath, baseTarget, base.ID)
ctx.Data["BeforeRawPath"] = fmt.Sprintf(rawPath, baseTarget, base.ID)
}
}
// setImageCompareContext sets context data that is required by image compare template
func setImageCompareContext(ctx *context.Context, base *git.Commit, head *git.Commit) {
ctx.Data["IsImageFileInHead"] = head.IsImageFile
ctx.Data["IsImageFileInBase"] = base.IsImageFile
ctx.Data["ImageInfoBase"] = func(name string) *git.ImageMetaData {
if base == nil {
return nil
}
result, err := base.ImageInfo(name)
if err != nil {
log.Error("ImageInfo failed: %v", err)
return nil
}
return result
}
ctx.Data["ImageInfo"] = func(name string) *git.ImageMetaData {
result, err := head.ImageInfo(name)
if err != nil {
log.Error("ImageInfo failed: %v", err)
return nil
}
return result
}
}
// ParseCompareInfo parse compare info between two commit for preparing comparing references
func ParseCompareInfo(ctx *context.Context) (*models.User, *models.Repository, *git.Repository, *git.CompareInfo, string, string) {
baseRepo := ctx.Repo.Repository
// Get compared branches information
// A full compare url is of the form:
//
// 1. /{:baseOwner}/{:baseRepoName}/compare/{:baseBranch}...{:headBranch}
// 2. /{:baseOwner}/{:baseRepoName}/compare/{:baseBranch}...{:headOwner}:{:headBranch}
// 3. /{:baseOwner}/{:baseRepoName}/compare/{:baseBranch}...{:headOwner}/{:headRepoName}:{:headBranch}
//
// Here we obtain the infoPath "{:baseBranch}...[{:headOwner}/{:headRepoName}:]{:headBranch}" as ctx.Params("*")
// with the :baseRepo in ctx.Repo.
//
// Note: Generally :headRepoName is not provided here - we are only passed :headOwner.
//
// How do we determine the :headRepo?
//
// 1. If :headOwner is not set then the :headRepo = :baseRepo
// 2. If :headOwner is set - then look for the fork of :baseRepo owned by :headOwner
// 3. But... :baseRepo could be a fork of :headOwner's repo - so check that
// 4. Now, :baseRepo and :headRepos could be forks of the same repo - so check that
//
// format: <base branch>...[<head repo>:]<head branch>
// base<-head: master...head:feature
// same repo: master...feature
var (
headUser *models.User
headRepo *models.Repository
headBranch string
isSameRepo bool
infoPath string
err error
)
infoPath = ctx.Params("*")
infos := strings.SplitN(infoPath, "...", 2)
if len(infos) != 2 {
log.Trace("ParseCompareInfo[%d]: not enough compared branches information %s", baseRepo.ID, infos)
ctx.NotFound("CompareAndPullRequest", nil)
return nil, nil, nil, nil, "", ""
}
ctx.Data["BaseName"] = baseRepo.OwnerName
baseBranch := infos[0]
ctx.Data["BaseBranch"] = baseBranch
// If there is no head repository, it means compare between same repository.
headInfos := strings.Split(infos[1], ":")
if len(headInfos) == 1 {
isSameRepo = true
headUser = ctx.Repo.Owner
headBranch = headInfos[0]
} else if len(headInfos) == 2 {
headInfosSplit := strings.Split(headInfos[0], "/")
if len(headInfosSplit) == 1 {
headUser, err = models.GetUserByName(headInfos[0])
if err != nil {
if models.IsErrUserNotExist(err) {
ctx.NotFound("GetUserByName", nil)
} else {
ctx.ServerError("GetUserByName", err)
}
return nil, nil, nil, nil, "", ""
}
headBranch = headInfos[1]
isSameRepo = headUser.ID == ctx.Repo.Owner.ID
if isSameRepo {
headRepo = baseRepo
}
} else {
headRepo, err = models.GetRepositoryByOwnerAndName(headInfosSplit[0], headInfosSplit[1])
if err != nil {
if models.IsErrRepoNotExist(err) {
ctx.NotFound("GetRepositoryByOwnerAndName", nil)
} else {
ctx.ServerError("GetRepositoryByOwnerAndName", err)
}
return nil, nil, nil, nil, "", ""
}
if err := headRepo.GetOwner(); err != nil {
if models.IsErrUserNotExist(err) {
ctx.NotFound("GetUserByName", nil)
} else {
ctx.ServerError("GetUserByName", err)
}
return nil, nil, nil, nil, "", ""
}
headBranch = headInfos[1]
headUser = headRepo.Owner
isSameRepo = headRepo.ID == ctx.Repo.Repository.ID
}
} else {
ctx.NotFound("CompareAndPullRequest", nil)
return nil, nil, nil, nil, "", ""
}
ctx.Data["HeadUser"] = headUser
ctx.Data["HeadBranch"] = headBranch
ctx.Repo.PullRequest.SameRepo = isSameRepo
// Check if base branch is valid.
baseIsCommit := ctx.Repo.GitRepo.IsCommitExist(baseBranch)
baseIsBranch := ctx.Repo.GitRepo.IsBranchExist(baseBranch)
baseIsTag := ctx.Repo.GitRepo.IsTagExist(baseBranch)
if !baseIsCommit && !baseIsBranch && !baseIsTag {
// Check if baseBranch is short sha commit hash
if baseCommit, _ := ctx.Repo.GitRepo.GetCommit(baseBranch); baseCommit != nil {
baseBranch = baseCommit.ID.String()
ctx.Data["BaseBranch"] = baseBranch
baseIsCommit = true
} else {
ctx.NotFound("IsRefExist", nil)
return nil, nil, nil, nil, "", ""
}
}
ctx.Data["BaseIsCommit"] = baseIsCommit
ctx.Data["BaseIsBranch"] = baseIsBranch
ctx.Data["BaseIsTag"] = baseIsTag
ctx.Data["IsPull"] = true
// Now we have the repository that represents the base
// The current base and head repositories and branches may not
// actually be the intended branches that the user wants to
// create a pull-request from - but also determining the head
// repo is difficult.
// We will want therefore to offer a few repositories to set as
// our base and head
// 1. First if the baseRepo is a fork get the "RootRepo" it was
// forked from
var rootRepo *models.Repository
if baseRepo.IsFork {
err = baseRepo.GetBaseRepo()
if err != nil {
if !models.IsErrRepoNotExist(err) {
ctx.ServerError("Unable to find root repo", err)
return nil, nil, nil, nil, "", ""
}
} else {
rootRepo = baseRepo.BaseRepo
}
}
// 2. Now if the current user is not the owner of the baseRepo,
// check if they have a fork of the base repo and offer that as
// "OwnForkRepo"
var ownForkRepo *models.Repository
if ctx.User != nil && baseRepo.OwnerID != ctx.User.ID {
repo, has := models.HasForkedRepo(ctx.User.ID, baseRepo.ID)
if has {
ownForkRepo = repo
ctx.Data["OwnForkRepo"] = ownForkRepo
}
}
has := headRepo != nil
// 3. If the base is a forked from "RootRepo" and the owner of
// the "RootRepo" is the :headUser - set headRepo to that
if !has && rootRepo != nil && rootRepo.OwnerID == headUser.ID {
headRepo = rootRepo
has = true
}
// 4. If the ctx.User has their own fork of the baseRepo and the headUser is the ctx.User
// set the headRepo to the ownFork
if !has && ownForkRepo != nil && ownForkRepo.OwnerID == headUser.ID {
headRepo = ownForkRepo
has = true
}
// 5. If the headOwner has a fork of the baseRepo - use that
if !has {
headRepo, has = models.HasForkedRepo(headUser.ID, baseRepo.ID)
}
// 6. If the baseRepo is a fork and the headUser has a fork of that use that
if !has && baseRepo.IsFork {
headRepo, has = models.HasForkedRepo(headUser.ID, baseRepo.ForkID)
}
// 7. Otherwise if we're not the same repo and haven't found a repo give up
if !isSameRepo && !has {
ctx.Data["PageIsComparePull"] = false
}
// 8. Finally open the git repo
var headGitRepo *git.Repository
if isSameRepo {
headRepo = ctx.Repo.Repository
headGitRepo = ctx.Repo.GitRepo
} else if has {
headGitRepo, err = git.OpenRepository(headRepo.RepoPath())
if err != nil {
ctx.ServerError("OpenRepository", err)
return nil, nil, nil, nil, "", ""
}
defer headGitRepo.Close()
}
ctx.Data["HeadRepo"] = headRepo
// Now we need to assert that the ctx.User has permission to read
// the baseRepo's code and pulls
// (NOT headRepo's)
permBase, err := models.GetUserRepoPermission(baseRepo, ctx.User)
if err != nil {
ctx.ServerError("GetUserRepoPermission", err)
return nil, nil, nil, nil, "", ""
}
if !permBase.CanRead(models.UnitTypeCode) {
if log.IsTrace() {
log.Trace("Permission Denied: User: %-v cannot read code in Repo: %-v\nUser in baseRepo has Permissions: %-+v",
ctx.User,
baseRepo,
permBase)
}
ctx.NotFound("ParseCompareInfo", nil)
return nil, nil, nil, nil, "", ""
}
// If we're not merging from the same repo:
if !isSameRepo {
// Assert ctx.User has permission to read headRepo's codes
permHead, err := models.GetUserRepoPermission(headRepo, ctx.User)
if err != nil {
ctx.ServerError("GetUserRepoPermission", err)
return nil, nil, nil, nil, "", ""
}
if !permHead.CanRead(models.UnitTypeCode) {
if log.IsTrace() {
log.Trace("Permission Denied: User: %-v cannot read code in Repo: %-v\nUser in headRepo has Permissions: %-+v",
ctx.User,
headRepo,
permHead)
}
ctx.NotFound("ParseCompareInfo", nil)
return nil, nil, nil, nil, "", ""
}
}
// If we have a rootRepo and it's different from:
// 1. the computed base
// 2. the computed head
// then get the branches of it
if rootRepo != nil &&
rootRepo.ID != headRepo.ID &&
rootRepo.ID != baseRepo.ID {
perm, branches, err := getBranchesForRepo(ctx.User, rootRepo)
if err != nil {
ctx.ServerError("GetBranchesForRepo", err)
return nil, nil, nil, nil, "", ""
}
if perm {
ctx.Data["RootRepo"] = rootRepo
ctx.Data["RootRepoBranches"] = branches
}
}
// If we have a ownForkRepo and it's different from:
// 1. The computed base
// 2. The computed hea
// 3. The rootRepo (if we have one)
// then get the branches from it.
if ownForkRepo != nil &&
ownForkRepo.ID != headRepo.ID &&
ownForkRepo.ID != baseRepo.ID &&
(rootRepo == nil || ownForkRepo.ID != rootRepo.ID) {
perm, branches, err := getBranchesForRepo(ctx.User, ownForkRepo)
if err != nil {
ctx.ServerError("GetBranchesForRepo", err)
return nil, nil, nil, nil, "", ""
}
if perm {
ctx.Data["OwnForkRepo"] = ownForkRepo
ctx.Data["OwnForkRepoBranches"] = branches
}
}
// Check if head branch is valid.
headIsCommit := headGitRepo.IsCommitExist(headBranch)
headIsBranch := headGitRepo.IsBranchExist(headBranch)
headIsTag := headGitRepo.IsTagExist(headBranch)
if !headIsCommit && !headIsBranch && !headIsTag {
// Check if headBranch is short sha commit hash
if headCommit, _ := headGitRepo.GetCommit(headBranch); headCommit != nil {
headBranch = headCommit.ID.String()
ctx.Data["HeadBranch"] = headBranch
headIsCommit = true
} else {
ctx.NotFound("IsRefExist", nil)
return nil, nil, nil, nil, "", ""
}
}
ctx.Data["HeadIsCommit"] = headIsCommit
ctx.Data["HeadIsBranch"] = headIsBranch
ctx.Data["HeadIsTag"] = headIsTag
// Treat as pull request if both references are branches
if ctx.Data["PageIsComparePull"] == nil {
ctx.Data["PageIsComparePull"] = headIsBranch && baseIsBranch
}
if ctx.Data["PageIsComparePull"] == true && !permBase.CanReadIssuesOrPulls(true) {
if log.IsTrace() {
log.Trace("Permission Denied: User: %-v cannot create/read pull requests in Repo: %-v\nUser in baseRepo has Permissions: %-+v",
ctx.User,
baseRepo,
permBase)
}
ctx.NotFound("ParseCompareInfo", nil)
return nil, nil, nil, nil, "", ""
}
baseBranchRef := baseBranch
if baseIsBranch {
baseBranchRef = git.BranchPrefix + baseBranch
} else if baseIsTag {
baseBranchRef = git.TagPrefix + baseBranch
}
headBranchRef := headBranch
if headIsBranch {
headBranchRef = git.BranchPrefix + headBranch
} else if headIsTag {
headBranchRef = git.TagPrefix + headBranch
}
compareInfo, err := headGitRepo.GetCompareInfo(baseRepo.RepoPath(), baseBranchRef, headBranchRef)
if err != nil {
ctx.ServerError("GetCompareInfo", err)
return nil, nil, nil, nil, "", ""
}
ctx.Data["BeforeCommitID"] = compareInfo.MergeBase
return headUser, headRepo, headGitRepo, compareInfo, baseBranch, headBranch
}
// PrepareCompareDiff renders compare diff page
func PrepareCompareDiff(
ctx *context.Context,
headUser *models.User,
headRepo *models.Repository,
headGitRepo *git.Repository,
compareInfo *git.CompareInfo,
baseBranch, headBranch string) bool {
var (
repo = ctx.Repo.Repository
err error
title string
)
// Get diff information.
ctx.Data["CommitRepoLink"] = headRepo.Link()
headCommitID := headBranch
if ctx.Data["HeadIsCommit"] == false {
if ctx.Data["HeadIsTag"] == true {
headCommitID, err = headGitRepo.GetTagCommitID(headBranch)
} else {
headCommitID, err = headGitRepo.GetBranchCommitID(headBranch)
}
if err != nil {
ctx.ServerError("GetRefCommitID", err)
return false
}
}
ctx.Data["AfterCommitID"] = headCommitID
if headCommitID == compareInfo.MergeBase {
ctx.Data["IsNothingToCompare"] = true
return true
}
diff, err := gitdiff.GetDiffRange(models.RepoPath(headUser.Name, headRepo.Name),
compareInfo.MergeBase, headCommitID, setting.Git.MaxGitDiffLines,
setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles)
if err != nil {
ctx.ServerError("GetDiffRange", err)
return false
}
ctx.Data["Diff"] = diff
ctx.Data["DiffNotAvailable"] = diff.NumFiles == 0
headCommit, err := headGitRepo.GetCommit(headCommitID)
if err != nil {
ctx.ServerError("GetCommit", err)
return false
}
baseGitRepo := ctx.Repo.GitRepo
baseCommitID := baseBranch
if ctx.Data["BaseIsCommit"] == false {
if ctx.Data["BaseIsTag"] == true {
baseCommitID, err = baseGitRepo.GetTagCommitID(baseBranch)
} else {
baseCommitID, err = baseGitRepo.GetBranchCommitID(baseBranch)
}
if err != nil {
ctx.ServerError("GetRefCommitID", err)
return false
}
}
baseCommit, err := baseGitRepo.GetCommit(baseCommitID)
if err != nil {
ctx.ServerError("GetCommit", err)
return false
}
compareInfo.Commits = models.ValidateCommitsWithEmails(compareInfo.Commits)
compareInfo.Commits = models.ParseCommitsWithSignature(compareInfo.Commits, headRepo)
compareInfo.Commits = models.ParseCommitsWithStatus(compareInfo.Commits, headRepo)
ctx.Data["Commits"] = compareInfo.Commits
ctx.Data["CommitCount"] = compareInfo.Commits.Len()
if compareInfo.Commits.Len() == 1 {
c := compareInfo.Commits.Front().Value.(models.SignCommitWithStatuses)
title = strings.TrimSpace(c.UserCommit.Summary())
body := strings.Split(strings.TrimSpace(c.UserCommit.Message()), "\n")
if len(body) > 1 {
ctx.Data["content"] = strings.Join(body[1:], "\n")
}
} else {
title = headBranch
}
ctx.Data["title"] = title
ctx.Data["Username"] = headUser.Name
ctx.Data["Reponame"] = headRepo.Name
setImageCompareContext(ctx, baseCommit, headCommit)
headTarget := path.Join(headUser.Name, repo.Name)
setPathsCompareContext(ctx, baseCommit, headCommit, headTarget)
return false
}
func getBranchesForRepo(user *models.User, repo *models.Repository) (bool, []string, error) {
perm, err := models.GetUserRepoPermission(repo, user)
if err != nil {
return false, nil, err
}
if !perm.CanRead(models.UnitTypeCode) {
return false, nil, nil
}
gitRepo, err := git.OpenRepository(repo.RepoPath())
if err != nil {
return false, nil, err
}
defer gitRepo.Close()
branches, err := gitRepo.GetBranches()
if err != nil {
return false, nil, err
}
return true, branches, nil
}
// CompareDiff show different from one commit to another commit
func CompareDiff(ctx *context.Context) {
headUser, headRepo, headGitRepo, compareInfo, baseBranch, headBranch := ParseCompareInfo(ctx)
if ctx.Written() {
return
}
defer headGitRepo.Close()
nothingToCompare := PrepareCompareDiff(ctx, headUser, headRepo, headGitRepo, compareInfo, baseBranch, headBranch)
if ctx.Written() {
return
}
if ctx.Data["PageIsComparePull"] == true {
headBranches, err := headGitRepo.GetBranches()
if err != nil {
ctx.ServerError("GetBranches", err)
return
}
ctx.Data["HeadBranches"] = headBranches
pr, err := models.GetUnmergedPullRequest(headRepo.ID, ctx.Repo.Repository.ID, headBranch, baseBranch)
if err != nil {
if !models.IsErrPullRequestNotExist(err) {
ctx.ServerError("GetUnmergedPullRequest", err)
return
}
} else {
ctx.Data["HasPullRequest"] = true
ctx.Data["PullRequest"] = pr
ctx.HTML(200, tplCompareDiff)
return
}
if !nothingToCompare {
// Setup information for new form.
RetrieveRepoMetas(ctx, ctx.Repo.Repository, true)
if ctx.Written() {
return
}
}
}
beforeCommitID := ctx.Data["BeforeCommitID"].(string)
afterCommitID := ctx.Data["AfterCommitID"].(string)
ctx.Data["Title"] = "Comparing " + base.ShortSha(beforeCommitID) + "..." + base.ShortSha(afterCommitID)
ctx.Data["IsRepoToolbarCommits"] = true
ctx.Data["IsDiffCompare"] = true
ctx.Data["RequireTribute"] = true
ctx.Data["RequireSimpleMDE"] = true
ctx.Data["PullRequestWorkInProgressPrefixes"] = setting.Repository.PullRequest.WorkInProgressPrefixes
setTemplateIfExists(ctx, pullRequestTemplateKey, nil, pullRequestTemplateCandidates)
ctx.Data["IsAttachmentEnabled"] = setting.Attachment.Enabled
upload.AddUploadContext(ctx, "comment")
ctx.Data["HasIssuesOrPullsWritePermission"] = ctx.Repo.CanWrite(models.UnitTypePullRequests)
ctx.HTML(200, tplCompare)
}
// ExcerptBlob render blob excerpt contents
func ExcerptBlob(ctx *context.Context) {
commitID := ctx.Params("sha")
lastLeft := ctx.QueryInt("last_left")
lastRight := ctx.QueryInt("last_right")
idxLeft := ctx.QueryInt("left")
idxRight := ctx.QueryInt("right")
leftHunkSize := ctx.QueryInt("left_hunk_size")
rightHunkSize := ctx.QueryInt("right_hunk_size")
anchor := ctx.Query("anchor")
direction := ctx.Query("direction")
filePath := ctx.Query("path")
gitRepo := ctx.Repo.GitRepo
chunkSize := gitdiff.BlobExcerptChunkSize
commit, err := gitRepo.GetCommit(commitID)
if err != nil {
ctx.Error(500, "GetCommit")
return
}
section := &gitdiff.DiffSection{
FileName: filePath,
Name: filePath,
}
if direction == "up" && (idxLeft-lastLeft) > chunkSize {
idxLeft -= chunkSize
idxRight -= chunkSize
leftHunkSize += chunkSize
rightHunkSize += chunkSize
section.Lines, err = getExcerptLines(commit, filePath, idxLeft-1, idxRight-1, chunkSize)
} else if direction == "down" && (idxLeft-lastLeft) > chunkSize {
section.Lines, err = getExcerptLines(commit, filePath, lastLeft, lastRight, chunkSize)
lastLeft += chunkSize
lastRight += chunkSize
} else {
section.Lines, err = getExcerptLines(commit, filePath, lastLeft, lastRight, idxRight-lastRight-1)
leftHunkSize = 0
rightHunkSize = 0
idxLeft = lastLeft
idxRight = lastRight
}
if err != nil {
ctx.Error(500, "getExcerptLines")
return
}
if idxRight > lastRight {
lineText := " "
if rightHunkSize > 0 || leftHunkSize > 0 {
lineText = fmt.Sprintf("@@ -%d,%d +%d,%d @@\n", idxLeft, leftHunkSize, idxRight, rightHunkSize)
}
lineText = html.EscapeString(lineText)
lineSection := &gitdiff.DiffLine{
Type: gitdiff.DiffLineSection,
Content: lineText,
SectionInfo: &gitdiff.DiffLineSectionInfo{
Path: filePath,
LastLeftIdx: lastLeft,
LastRightIdx: lastRight,
LeftIdx: idxLeft,
RightIdx: idxRight,
LeftHunkSize: leftHunkSize,
RightHunkSize: rightHunkSize,
}}
if direction == "up" {
section.Lines = append([]*gitdiff.DiffLine{lineSection}, section.Lines...)
} else if direction == "down" {
section.Lines = append(section.Lines, lineSection)
}
}
ctx.Data["section"] = section
ctx.Data["fileName"] = filePath
ctx.Data["AfterCommitID"] = commitID
ctx.Data["Anchor"] = anchor
ctx.HTML(200, tplBlobExcerpt)
}
func getExcerptLines(commit *git.Commit, filePath string, idxLeft int, idxRight int, chunkSize int) ([]*gitdiff.DiffLine, error) {
blob, err := commit.Tree.GetBlobByPath(filePath)
if err != nil {
return nil, err
}
reader, err := blob.DataAsync()
if err != nil {
return nil, err
}
defer reader.Close()
scanner := bufio.NewScanner(reader)
var diffLines []*gitdiff.DiffLine
for line := 0; line < idxRight+chunkSize; line++ {
if ok := scanner.Scan(); !ok {
break
}
if line < idxRight {
continue
}
lineText := scanner.Text()
diffLine := &gitdiff.DiffLine{
LeftIdx: idxLeft + (line - idxRight) + 1,
RightIdx: line + 1,
Type: gitdiff.DiffLinePlain,
Content: " " + lineText,
}
diffLines = append(diffLines, diffLine)
}
return diffLines, nil
}
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