podman volume exists

Add podman volume exists command with remote support.

Signed-off-by: Paul Holzinger <paul.holzinger@web.de>

2 files changed, 41 insertions, 0 deletions

diff --git a/pkg/api/handlers/libpod/volumes.go b/pkg/api/handlers/libpod/volumes.go
index 38fdf1b4d..1a8759c6c 100644
--- a/pkg/api/handlers/libpod/volumes.go
+++ b/pkg/api/handlers/libpod/volumes.go
@@ -11,6 +11,7 @@ import (
 	"github.com/containers/podman/v2/pkg/domain/entities"
 	"github.com/containers/podman/v2/pkg/domain/entities/reports"
 	"github.com/containers/podman/v2/pkg/domain/filters"
+	"github.com/containers/podman/v2/pkg/domain/infra/abi"
 	"github.com/containers/podman/v2/pkg/domain/infra/abi/parse"
 	"github.com/gorilla/schema"
 	"github.com/pkg/errors"
@@ -203,3 +204,21 @@ func RemoveVolume(w http.ResponseWriter, r *http.Request) {
 	}
 	utils.WriteResponse(w, http.StatusNoContent, "")
 }
+
+// ExistsVolume check if a volume exists
+func ExistsVolume(w http.ResponseWriter, r *http.Request) {
+	runtime := r.Context().Value("runtime").(*libpod.Runtime)
+	name := utils.GetName(r)
+
+	ic := abi.ContainerEngine{Libpod: runtime}
+	report, err := ic.VolumeExists(r.Context(), name)
+	if err != nil {
+		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, err)
+		return
+	}
+	if !report.Value {
+		utils.Error(w, "volume not found", http.StatusNotFound, define.ErrNoSuchVolume)
+		return
+	}
+	utils.WriteResponse(w, http.StatusNoContent, "")
+}
diff --git a/pkg/api/server/register_volumes.go b/pkg/api/server/register_volumes.go
index aa0f67604..68727f2e1 100644
--- a/pkg/api/server/register_volumes.go
+++ b/pkg/api/server/register_volumes.go
@@ -28,6 +28,28 @@ func (s *APIServer) registerVolumeHandlers(r *mux.Router) error {
 	//   '500':
 	//      "$ref": "#/responses/InternalError"
 	r.Handle(VersionedPath("/libpod/volumes/create"), s.APIHandler(libpod.CreateVolume)).Methods(http.MethodPost)
+	// swagger:operation GET /libpod/volumes/{name}/exists libpod libpodExistsVolume
+	// ---
+	// tags:
+	//  - volumes
+	// summary: Volume exists
+	// description: Check if a volume exists
+	// parameters:
+	//  - in: path
+	//    name: name
+	//    type: string
+	//    required: true
+	//    description: the name of the volume
+	// produces:
+	// - application/json
+	// responses:
+	//   204:
+	//     description: volume exists
+	//   404:
+	//     $ref: '#/responses/NoSuchVolume'
+	//   500:
+	//     $ref: '#/responses/InternalError'
+	r.Handle(VersionedPath("/libpod/volumes/{name}/exists"), s.APIHandler(libpod.ExistsVolume)).Methods(http.MethodGet)
 	// swagger:operation GET /libpod/volumes/json libpod libpodListVolumes
 	// ---
 	// tags: