Add support for running pipeline triggers

pipeline_triggers.go

@@ -197,3 +197,38 @@ func (s *PipelineTriggersService) DeletePipelineTrigger(pid interface{}, trigger
 
 	return s.client.Do(req, nil)
 }
+
+// RunPipelineTriggerOptions represents the available RunPipelineTrigger() options.
+//
+// GitLab API docs:
+// https://docs.gitlab.com/ce/ci/triggers/README.html#triggering-a-pipeline
+type RunPipelineTriggerOptions struct {
+	Ref       *string           `url:"ref" json:"ref"`
+	Token     *string           `url:"token" json:"token"`
+	Variables map[string]string `url:"variables,omitempty" json:"variables,omitempty"`
+}
+
+// RunPipelineTrigger starts a trigger from a project.
+//
+// GitLab API docs:
+// https://docs.gitlab.com/ce/ci/triggers/README.html#triggering-a-pipeline
+func (s *PipelineTriggersService) RunPipelineTrigger(pid interface{}, opt *RunPipelineTriggerOptions, options ...OptionFunc) (*Pipeline, *Response, error) {
+	project, err := parseID(pid)
+	if err != nil {
+		return nil, nil, err
+	}
+	u := fmt.Sprintf("projects/%s/trigger/pipeline", url.QueryEscape(project))
+
+	req, err := s.client.NewRequest("POST", u, opt, options)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	pt := new(Pipeline)
+	resp, err := s.client.Do(req, pt)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return pt, resp, err
+}

pipeline_triggers_test.go

+package gitlab
+
+import (
+	"fmt"
+	"net/http"
+	"reflect"
+	"testing"
+)
+
+func TestRunPipeline(t *testing.T) {
+	mux, server, client := setup()
+	defer teardown(server)
+
+	mux.HandleFunc("/projects/1/trigger/pipeline", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "POST")
+		fmt.Fprint(w, `{"id":1, "status":"pending"}`)
+	})
+
+	opt := &RunPipelineTriggerOptions{Ref: String("master")}
+	pipeline, _, err := client.PipelineTriggers.RunPipelineTrigger(1, opt)
+
+	if err != nil {
+		t.Errorf("PipelineTriggers.RunPipelineTrigger returned error: %v", err)
+	}
+
+	want := &Pipeline{ID: 1, Status: "pending"}
+	if !reflect.DeepEqual(want, pipeline) {
+		t.Errorf("PipelineTriggers.RunPipelineTrigger returned %+v, want %+v", pipeline, want)
+	}
+}