feat(third_party): Check in git-appraise

third_party/go/git-appraise/git-appraise/git-appraise.go

@@ -0,0 +1,104 @@
+/*
+Copyright 2015 Google Inc. All rights reserved.
+
+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.
+*/
+
+// Command git-appraise manages code reviews stored as git-notes in the source repo.
+//
+// To install, run:
+//
+//    $ go get github.com/google/git-appraise/git-appraise
+//
+// And for usage information, run:
+//
+//    $ git-appraise help
+package main
+
+import (
+	"fmt"
+	"github.com/google/git-appraise/commands"
+	"github.com/google/git-appraise/repository"
+	"os"
+	"sort"
+	"strings"
+)
+
+const usageMessageTemplate = `Usage: %s <command>
+
+Where <command> is one of:
+  %s
+
+For individual command usage, run:
+  %s help <command>
+`
+
+func usage() {
+	command := os.Args[0]
+	var subcommands []string
+	for subcommand := range commands.CommandMap {
+		subcommands = append(subcommands, subcommand)
+	}
+	sort.Strings(subcommands)
+	fmt.Printf(usageMessageTemplate, command, strings.Join(subcommands, "\n  "), command)
+}
+
+func help() {
+	if len(os.Args) < 3 {
+		usage()
+		return
+	}
+	subcommand, ok := commands.CommandMap[os.Args[2]]
+	if !ok {
+		fmt.Printf("Unknown command %q\n", os.Args[2])
+		usage()
+		return
+	}
+	subcommand.Usage(os.Args[0])
+}
+
+func main() {
+	if len(os.Args) > 1 && os.Args[1] == "help" {
+		help()
+		return
+	}
+	cwd, err := os.Getwd()
+	if err != nil {
+		fmt.Printf("Unable to get the current working directory: %q\n", err)
+		return
+	}
+	repo, err := repository.NewGitRepo(cwd)
+	if err != nil {
+		fmt.Printf("%s must be run from within a git repo.\n", os.Args[0])
+		return
+	}
+	if len(os.Args) < 2 {
+		subcommand, ok := commands.CommandMap["list"]
+		if !ok {
+			fmt.Printf("Unable to list reviews")
+			return
+		}
+		subcommand.Run(repo, []string{})
+		return
+	}
+	subcommand, ok := commands.CommandMap[os.Args[1]]
+	if !ok {
+		fmt.Printf("Unknown command: %q\n", os.Args[1])
+		usage()
+		return
+	}
+	if err := subcommand.Run(repo, os.Args[2:]); err != nil {
+		fmt.Println(err.Error())
+		os.Exit(1)
+	}
+}