pkg/tool: add constraints for tasks
Updates #39
Change-Id: Ied624912324b773b56ff4f2a1bf85a88c22ecc45
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/1924
Reviewed-by: Marcel van Lohuizen <mpvl@google.com>
diff --git a/pkg/tool/cli/cli.cue b/pkg/tool/cli/cli.cue
new file mode 100644
index 0000000..986f43a
--- /dev/null
+++ b/pkg/tool/cli/cli.cue
@@ -0,0 +1,42 @@
+// Copyright 2018 The CUE Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cli
+
+// Print sends text to the stdout of the current process.
+Print: {
+ kind: "tool/cli.Print"
+
+ // text is the text to be printed.
+ text: string
+}
+
+// TODO:
+// Ask prompts the current console with a message and waits for input.
+//
+// Example:
+// task ask: cli.Ask({
+// prompt: "Are you okay?"
+// repsonse: bool
+// })
+// Ask: {
+// kind: "tool/cli.Ask"
+
+// // prompt sends this message to the output.
+// prompt: string
+
+// // response holds the user's response. If it is a boolean expression it
+// // will interpret the answer using textual yes/ no.
+// response: string | bool
+// }
