Rewrite existing repo units if setting is not included in api body (#7763)

* Rewrite existing repo units if setting is not included in api body

Signed-off-by: David Svantesson <davidsvantesson@gmail.com>

* else-if on one row

routers/api/v1/repo/repo.go

@@ -651,8 +651,14 @@ func updateRepoUnits(ctx *context.APIContext, opts api.EditRepoOption) error {
 		})
 	}
 
-	if opts.HasIssues != nil {
-		if *opts.HasIssues {
+	if opts.HasIssues == nil {
+		// If HasIssues setting not touched, rewrite existing repo unit
+		if unit, err := repo.GetUnit(models.UnitTypeIssues); err == nil {
+			units = append(units, *unit)
+		} else if unit, err := repo.GetUnit(models.UnitTypeExternalTracker); err == nil {
+			units = append(units, *unit)
+		}
+	} else if *opts.HasIssues {
 		// We don't currently allow setting individual issue settings through the API,
 		// only can enable/disable issues, so when enabling issues,
 		// we either get the existing config which means it was already enabled,
@@ -675,10 +681,15 @@ func updateRepoUnits(ctx *context.APIContext, opts api.EditRepoOption) error {
 			Config: config,
 		})
 	}
-	}
 
-	if opts.HasWiki != nil {
-		if *opts.HasWiki {
+	if opts.HasWiki == nil {
+		// If HasWiki setting not touched, rewrite existing repo unit
+		if unit, err := repo.GetUnit(models.UnitTypeWiki); err == nil {
+			units = append(units, *unit)
+		} else if unit, err := repo.GetUnit(models.UnitTypeExternalWiki); err == nil {
+			units = append(units, *unit)
+		}
+	} else if *opts.HasWiki {
 		// We don't currently allow setting individual wiki settings through the API,
 		// only can enable/disable the wiki, so when enabling the wiki,
 		// we either get the existing config which means it was already enabled,
@@ -690,10 +701,13 @@ func updateRepoUnits(ctx *context.APIContext, opts api.EditRepoOption) error {
 			Config: config,
 		})
 	}
-	}
 
-	if opts.HasPullRequests != nil {
-		if *opts.HasPullRequests {
+	if opts.HasPullRequests == nil {
+		// If HasPullRequest setting not touched, rewrite existing repo unit
+		if unit, err := repo.GetUnit(models.UnitTypePullRequests); err == nil {
+			units = append(units, *unit)
+		}
+	} else if *opts.HasPullRequests {
 		// We do allow setting individual PR settings through the API, so
 		// we get the config settings and then set them
 		// if those settings were provided in the opts.
@@ -734,7 +748,6 @@ func updateRepoUnits(ctx *context.APIContext, opts api.EditRepoOption) error {
 			Config: config,
 		})
 	}
-	}
 
 	if err := models.UpdateRepositoryUnits(repo, units); err != nil {
 		ctx.Error(http.StatusInternalServerError, "UpdateRepositoryUnits", err)