Fix resolve common ancestor hash when revision not found

go.mod

@@ -27,10 +27,7 @@ require (
 	github.com/CycloneDX/cyclonedx-go v0.9.0 // indirect
 	github.com/Microsoft/go-winio v0.6.1 // indirect
 	github.com/ProtonMail/go-crypto v1.1.2 // indirect
-	github.com/VividCortex/ewma v1.2.0 // indirect
-	github.com/acarl005/stripansi v0.0.0-20180116102854-5a71ef0e047d // indirect
 	github.com/andybalholm/brotli v1.1.0 // indirect
-	github.com/beevik/etree v1.4.0 // indirect
 	github.com/buger/jsonparser v1.1.1 // indirect
 	github.com/c-bata/go-prompt v0.2.5 // indirect
 	github.com/chzyer/readline v1.5.1 // indirect
@@ -96,7 +93,6 @@ require (
 	github.com/subosito/gotenv v1.6.0 // indirect
 	github.com/ulikunitz/xz v0.5.12 // indirect
 	github.com/urfave/cli v1.22.16 // indirect
-	github.com/vbauerster/mpb/v8 v8.8.3 // indirect
 	github.com/virtuald/go-ordered-json v0.0.0-20170621173500-b18e6e673d74 // indirect
 	github.com/xanzy/go-gitlab v0.110.0 // indirect
 	github.com/xanzy/ssh-agent v0.3.3 // indirect

go.sum

@@ -22,8 +22,6 @@ github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be/go.mod h1:ySMOLuW
 github.com/apparentlymart/go-textseg/v13 v13.0.0/go.mod h1:ZK2fH7c4NqDTLtiYLvIkEghdlcqw7yxLeM89kiTRPUo=
 github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5 h1:0CwZNZbxp69SHPdPJAN/hZIm0C4OItdklCFmMRWYpio=
 github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5/go.mod h1:wHh0iHkYZB8zMSxRWpUBQtwG5a7fFgvEO+odwuTv2gs=
-github.com/beevik/etree v1.4.0 h1:oz1UedHRepuY3p4N5OjE0nK1WLCqtzHf25bxplKOHLs=
-github.com/beevik/etree v1.4.0/go.mod h1:cyWiXwGoasx60gHvtnEh5x8+uIjUVnjWqBvEnhnqKDA=
 github.com/bradleyjkemp/cupaloy/v2 v2.8.0 h1:any4BmKE+jGIaMpnU8YgH/I2LPiLBufr6oMMlVBbn9M=
 github.com/bradleyjkemp/cupaloy/v2 v2.8.0/go.mod h1:bm7JXdkRd4BHJk9HpwqAI8BoAY1lps46Enkdqw6aRX0=
 github.com/buger/jsonparser v1.1.1 h1:2PnMjfWD7wBILjqQbt530v576A/cAbQvEW9gGIpYMUs=

scanpullrequest/scanpullrequest.go

@@ -255,39 +255,31 @@ func tryCheckoutToMostCommonAncestor(scanDetails *utils.ScanDetails, baseBranch,
 		return
 	}
 	scanDetails.Git.RepositoryCloneUrl = repositoryInfo.CloneInfo.HTTP
-	bestAncestorHash, err := getMostCommonAncestorCommitHash(scanDetails, baseBranch, headBranch)
-	if err != nil {
-		return
-	}
-	return checkoutToCommitAtTempWorkingDir(scanDetails, bestAncestorHash, targetBranchWd)
-}
-
-func getMostCommonAncestorCommitHash(scanDetails *utils.ScanDetails, baseBranch, headBranch string) (hash string, err error) {
-	gitManager, err := utils.NewGitManager().SetAuth(scanDetails.Username, scanDetails.Token).SetRemoteGitUrl(scanDetails.Git.RepositoryCloneUrl)
-	if err != nil {
-		return
-	}
-	return gitManager.GetMostCommonAncestorHash(baseBranch, headBranch)
-}
-
-func checkoutToCommitAtTempWorkingDir(scanDetails *utils.ScanDetails, commitHash, wd string) (err error) {
 	// Change working directory to the temp target branch directory
 	cwd, err := os.Getwd()
 	if err != nil {
 		return
 	}
-	if err = os.Chdir(wd); err != nil {
+	if err = os.Chdir(targetBranchWd); err != nil {
 		return
 	}
 	defer func() {
 		err = errors.Join(err, os.Chdir(cwd))
 	}()
-	// Load .git info in directory and Checkout to the commit hash
+	// Create a new git manager and fetch
 	gitManager, err := utils.NewGitManager().SetAuth(scanDetails.Username, scanDetails.Token).SetRemoteGitUrl(scanDetails.Git.RepositoryCloneUrl)
 	if err != nil {
 		return
 	}
-	return gitManager.CheckoutToHash(commitHash, wd)
+	if err = gitManager.Fetch(); err != nil {
+		return
+	}
+	// Get the most common ancestor commit hash
+	bestAncestorHash, err := gitManager.GetMostCommonAncestorHash(baseBranch, headBranch)
+	if err != nil {
+		return
+	}
+	return gitManager.CheckoutToHash(bestAncestorHash)
 }
 
 func getAllIssues(cmdResults *results.SecurityCommandResults, allowedLicenses []string, hasViolationContext bool) (*utils.IssuesCollection, error) {

utils/git.go

@@ -161,10 +161,7 @@ func (gm *GitManager) Checkout(branchName string) error {
 	return nil
 }
 
-func (gm *GitManager) CheckoutToHash(hash, targetBranchWd string) error {
-	if err := gm.Fetch(); err != nil {
-		return err
-	}
+func (gm *GitManager) CheckoutToHash(hash string) error {
 	log.Debug("Running git checkout to hash:", hash)
 	if err := gm.createBranchAndCheckoutToHash(hash, false); err != nil {
 		return fmt.Errorf("'git checkout %s' failed with error: %s", hash, err.Error())
@@ -187,7 +184,7 @@ func (gm *GitManager) Fetch() error {
 
 func (gm *GitManager) GetMostCommonAncestorHash(baseBranch, targetBranch string) (string, error) {
 	// Get the commit of the base branch
-	baseCommitHash, err := gm.localGitRepository.ResolveRevision(plumbing.Revision(baseBranch))
+	baseCommitHash, err := gm.localGitRepository.ResolveRevision(plumbing.Revision(fmt.Sprintf("%s/%s", gm.remoteName, baseBranch)))
 	if err != nil {
 		return "", err
 	}
@@ -196,7 +193,7 @@ func (gm *GitManager) GetMostCommonAncestorHash(baseBranch, targetBranch string)
 		return "", err
 	}
 	// Get the HEAD commit of the target branch
-	headCommitHash, err := gm.localGitRepository.ResolveRevision(plumbing.Revision(targetBranch))
+	headCommitHash, err := gm.localGitRepository.ResolveRevision(plumbing.Revision(fmt.Sprintf("%s/%s", gm.remoteName, targetBranch)))
 	if err != nil {
 		return "", err
 	}