Adds vendor data

vendor/github.com/sethvargo/go-githubactions/command.go

@@ -0,0 +1,112 @@
+// Copyright 2020 The 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 githubactions
+
+import (
+	"fmt"
+	"sort"
+	"strings"
+)
+
+const (
+	cmdSeparator        = "::"
+	cmdPropertiesPrefix = " "
+)
+
+// CommandProperties is a named "map[string]string" type to hold key-value pairs
+// passed to an actions command.
+type CommandProperties map[string]string
+
+// String encodes the CommandProperties to a string as comma separated
+// 'key=value' pairs. The pairs are joined in a chronological order.
+func (props *CommandProperties) String() string {
+	l := make([]string, 0, len(*props))
+	for k, v := range *props {
+		l = append(l, fmt.Sprintf("%s=%s", k, escapeProperty(v)))
+	}
+
+	sort.Strings(l)
+	return strings.Join(l, ",")
+}
+
+// Command can be issued by a GitHub action by writing to `stdout` with
+// following format.
+//
+// ::name key=value,key=value::message
+//
+//  Examples:
+//    ::warning::This is the message
+//    ::set-env name=MY_VAR::some value
+type Command struct {
+	Name       string
+	Message    string
+	Properties CommandProperties
+}
+
+// String encodes the Command to a string in the following format:
+//
+// ::name key=value,key=value::message
+func (cmd *Command) String() string {
+	// https://github.com/actions/toolkit/blob/9ad01e4fd30025e8858650d38e95cfe9193a3222/packages/core/src/command.ts#L43-L45
+	if cmd.Name == "" {
+		cmd.Name = "missing.command"
+	}
+
+	var builder strings.Builder
+	builder.WriteString(cmdSeparator)
+	builder.WriteString(cmd.Name)
+	if len(cmd.Properties) > 0 {
+		builder.WriteString(cmdPropertiesPrefix)
+		builder.WriteString(cmd.Properties.String())
+	}
+
+	builder.WriteString(cmdSeparator)
+	builder.WriteString(escapeData(cmd.Message))
+	return builder.String()
+}
+
+// escapeData escapes string values for presentation in the output of a command.
+// This is a not-so-well-documented requirement of commands that define a
+// message:
+//
+// https://github.com/actions/toolkit/blob/9ad01e4fd30025e8858650d38e95cfe9193a3222/packages/core/src/command.ts#L74
+//
+// The equivalent toolkit function can be found here:
+//
+// https://github.com/actions/toolkit/blob/9ad01e4fd30025e8858650d38e95cfe9193a3222/packages/core/src/command.ts#L92
+//
+func escapeData(v string) string {
+	v = strings.ReplaceAll(v, "%", "%25")
+	v = strings.ReplaceAll(v, "\r", "%0D")
+	v = strings.ReplaceAll(v, "\n", "%0A")
+	return v
+}
+
+// escapeData escapes command property values for presentation in the output of
+// a command.
+//
+// https://github.com/actions/toolkit/blob/9ad01e4fd30025e8858650d38e95cfe9193a3222/packages/core/src/command.ts#L68
+//
+// The equivalent toolkit function can be found here:
+//
+// https://github.com/actions/toolkit/blob/1cc56db0ff126f4d65aeb83798852e02a2c180c3/packages/core/src/command.ts#L99-L106
+func escapeProperty(v string) string {
+	v = strings.ReplaceAll(v, "%", "%25")
+	v = strings.ReplaceAll(v, "\r", "%0D")
+	v = strings.ReplaceAll(v, "\n", "%0A")
+	v = strings.ReplaceAll(v, ":", "%3A")
+	v = strings.ReplaceAll(v, ",", "%2C")
+	return v
+}