Add support for single-cmd tasks (fixes #1130)

task_test.go

@@ -1892,3 +1892,15 @@ func TestSplitArgs(t *testing.T) {
 	require.NoError(t, err)
 	assert.Equal(t, "3\n", buff.String())
 }
+
+func TestSingleCmdDep(t *testing.T) {
+	tt := fileContentTest{
+		Dir:    "testdata/single_cmd_dep",
+		Target: "foo",
+		Files: map[string]string{
+			"foo.txt": "foo\n",
+			"bar.txt": "bar\n",
+		},
+	}
+	tt.Run(t)
+}

taskfile/task.go

@@ -73,6 +73,7 @@ func (t *Task) UnmarshalYAML(node *yaml.Node) error {
 	case yaml.MappingNode:
 		var task struct {
 			Cmds          []*Cmd
+			Cmd           *Cmd
 			Deps          []*Dep
 			Label         string
 			Desc          string
@@ -100,7 +101,11 @@ func (t *Task) UnmarshalYAML(node *yaml.Node) error {
 		if err := node.Decode(&task); err != nil {
 			return err
 		}
-		t.Cmds = task.Cmds
+		if task.Cmd != nil {
+			t.Cmds = []*Cmd{task.Cmd}
+		} else {
+			t.Cmds = task.Cmds
+		}
 		t.Deps = task.Deps
 		t.Label = task.Label
 		t.Desc = task.Desc

testdata/single_cmd_dep/.gitignore

@@ -0,0 +1 @@
+*.txt

testdata/single_cmd_dep/Taskfile.yml

@@ -0,0 +1,8 @@
+version: "3"
+
+tasks:
+  foo:
+    deps: [bar]
+    cmd: echo foo > foo.txt
+
+  bar: echo bar > bar.txt