Fixes #716 "Managing projects requires admin role" by using the users…

….ListProjects API entry point if not admin permission (#833)

openstack/data_source_openstack_identity_project_v3.go

@@ -5,6 +5,8 @@ import (
 	"log"
 
 	"github.com/gophercloud/gophercloud/openstack/identity/v3/projects"
+	"github.com/gophercloud/gophercloud/openstack/identity/v3/tokens"
+	"github.com/gophercloud/gophercloud/openstack/identity/v3/users"
 	"github.com/hashicorp/terraform/helper/schema"
 )
 
@@ -56,9 +58,20 @@ func dataSourceIdentityProjectV3() *schema.Resource {
 	}
 }
 
+func filterProjects(allProjects []projects.Project, listOpts projects.ListOpts) (results []projects.Project) {
+	for _, p := range allProjects {
+		// TODO: Test for all fields :)
+		if p.Name == listOpts.Name {
+			results = append(results, p)
+		}
+	}
+	return
+}
+
 // dataSourceIdentityProjectV3Read performs the project lookup.
 func dataSourceIdentityProjectV3Read(d *schema.ResourceData, meta interface{}) error {
 	config := meta.(*Config)
+
 	identityClient, err := config.identityV3Client(GetRegion(d, config))
 	if err != nil {
 		return fmt.Errorf("Error creating OpenStack identity client: %s", err)
@@ -74,17 +87,43 @@ func dataSourceIdentityProjectV3Read(d *schema.ResourceData, meta interface{}) e
 		ParentID: d.Get("parent_id").(string),
 	}
 
-	log.Printf("[DEBUG] openstack_identity_project_v3 list options: %#v", listOpts)
-
 	var project projects.Project
+	var allProjects []projects.Project
 	allPages, err := projects.List(identityClient, listOpts).AllPages()
 	if err != nil {
-		return fmt.Errorf("Unable to query openstack_identity_project_v3: %s", err)
-	}
-
-	allProjects, err := projects.ExtractProjects(allPages)
-	if err != nil {
-		return fmt.Errorf("Unable to retrieve openstack_identity_project_v3: %s", err)
+		userID := config.UserID
+		log.Printf("[DEBUG] Will try to find project with users.ListProjects as I am unable to query openstack_identity_project_v3: %s. Trying listing userprojects.", err)
+		if userID == "" {
+			// If we don't have the ID for the user we will try to fetch it from the Token
+			tokenID := config.OsClient.TokenID
+			d.SetId(d.Get("name").(string))
+			result := tokens.Get(identityClient, tokenID)
+			if result.Err != nil {
+				log.Printf("[ERROR] Error when getting token info %s", result)
+				return result.Err
+			}
+			user, err := result.ExtractUser()
+			if err != nil {
+				log.Printf("[ERROR] Error when extracting user: %s", err)
+				return err
+			}
+			userID = user.ID
+		}
+		// Search for all the projects using the users.ListProjects API call and filter them
+		allPages, err = users.ListProjects(identityClient, userID).AllPages()
+		if err != nil {
+			return fmt.Errorf("Unable to query openstack_identity_project_v3: %s", err)
+		}
+		allProjects, err = projects.ExtractProjects(allPages)
+		if err != nil {
+			return fmt.Errorf("Unable to retrieve openstack_identity_project_v3: %s", err)
+		}
+		allProjects = filterProjects(allProjects, listOpts)
+	} else {
+		allProjects, err = projects.ExtractProjects(allPages)
+		if err != nil {
+			return fmt.Errorf("Unable to retrieve openstack_identity_project_v3: %s", err)
+		}
 	}
 
 	if len(allProjects) < 1 {