datasource/gitlab_project: Add ci_default_git_depth attribute

Author: timofurrer

docs/data-sources/projects.md

@@ -93,6 +93,7 @@ Read-Only:
 - `build_timeout` (Number)
 - `builds_access_level` (String)
 - `ci_config_path` (String)
+- `ci_default_git_depth` (Number)
 - `ci_forward_deployment_enabled` (Boolean)
 - `container_expiration_policy` (List of Object) (see [below for nested schema](#nestedobjatt--projects--container_expiration_policy))
 - `container_registry_access_level` (String)

internal/provider/data_source_gitlab_projects.go

@@ -190,6 +190,7 @@ func flattenProjects(projects []*gitlab.Project) (values []map[string]interface{
 				"wiki_access_level":                                string(project.WikiAccessLevel),
 				"squash_commit_template":                           project.SquashCommitTemplate,
 				"merge_commit_template":                            project.MergeCommitTemplate,
+				"ci_default_git_depth":                             project.CIDefaultGitDepth,
 			}
 			values = append(values, v)
 		}
@@ -944,6 +945,12 @@ var _ = registerDataSource("gitlab_projects", func() *schema.Resource {
 							Type:        schema.TypeString,
 							Computed:    true,
 						},
+						"ci_default_git_depth": {
+							Description: "Default number of revisions for shallow cloning.",
+							Type:        schema.TypeInt,
+							Optional:    true,
+							Computed:    true,
+						},
 					},
 				},
 			},