Implement cache migrations

internal/remotes/projects/projects.go

@@ -9,6 +9,8 @@ import (
 	"github.com/go-git/go-git/v5"
 )
 
+// Git project metadata
+// Do not use Project.ID directly (remotes may conflict), use Project.GetID()
 type Project struct {
 	ID                int
 	Description       string
@@ -44,19 +46,30 @@ func (pl *ProjectLanguages) AddLanguage(lang *ProjectLanguage) {
 	*pl = append(*pl, lang)
 }
 
-// Gets a unique ID using a short-sha of the http repo URL
+// Gets a unique ID using a short-sha of the http repo
 // along with the numerical ID of the project.
 // Uses SSH URL and then Remote if previous is empty
 func (p *Project) GetID() string {
-	shaText := p.HTTPURLToRepo
-	if shaText == "" && p.SSHURLToRepo != "" {
-		shaText = p.SSHURLToRepo
-	} else if shaText == "" {
-		shaText = p.Remote
+	return fmt.Sprintf("%s||%d", p.GetRemoteSha(), p.ID)
+}
+
+func MakeID(remote string, projectID int) string {
+	return fmt.Sprintf("%s||%d", GetRemoteSha(remote), projectID)
+}
+
+func (p *Project) GetRemoteSha() string {
+	remote := p.Remote
+	if remote == "" && p.HTTPURLToRepo != "" {
+		remote = p.HTTPURLToRepo
+	} else if remote == "" && p.WebURL != "" {
+		remote = p.WebURL
 	}
 
-	shortSha := fmt.Sprintf("%x", sha1.Sum([]byte(shaText)))[:12]
-	return fmt.Sprintf("%s||%d", shortSha, p.ID)
+	return GetRemoteSha(remote)
+}
+
+func GetRemoteSha(remote string) string {
+	return fmt.Sprintf("%x", sha1.Sum([]byte(remote)))[:12]
 }
 
 func (p *Project) String() string {