feat(third_party): Check in git-appraise

third_party/go/git-appraise/commands/show.go

@@ -0,0 +1,85 @@
+/*
+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.
+*/
+
+package commands
+
+import (
+	"errors"
+	"flag"
+	"fmt"
+	"github.com/google/git-appraise/commands/output"
+	"github.com/google/git-appraise/repository"
+	"github.com/google/git-appraise/review"
+	"strings"
+)
+
+var showFlagSet = flag.NewFlagSet("show", flag.ExitOnError)
+
+var (
+	showJSONOutput  = showFlagSet.Bool("json", false, "Format the output as JSON")
+	showDiffOutput  = showFlagSet.Bool("diff", false, "Show the current diff for the review")
+	showDiffOptions = showFlagSet.String("diff-opts", "", "Options to pass to the diff tool; can only be used with the --diff option")
+)
+
+// showReview prints the current code review.
+func showReview(repo repository.Repo, args []string) error {
+	showFlagSet.Parse(args)
+	args = showFlagSet.Args()
+	if *showDiffOptions != "" && !*showDiffOutput {
+		return errors.New("The --diff-opts flag can only be used if the --diff flag is set.")
+	}
+
+	var r *review.Review
+	var err error
+	if len(args) > 1 {
+		return errors.New("Only showing a single review is supported.")
+	}
+
+	if len(args) == 1 {
+		r, err = review.Get(repo, args[0])
+	} else {
+		r, err = review.GetCurrent(repo)
+	}
+
+	if err != nil {
+		return fmt.Errorf("Failed to load the review: %v\n", err)
+	}
+	if r == nil {
+		return errors.New("There is no matching review.")
+	}
+	if *showJSONOutput {
+		return output.PrintJSON(r)
+	}
+	if *showDiffOutput {
+		var diffArgs []string
+		if *showDiffOptions != "" {
+			diffArgs = strings.Split(*showDiffOptions, ",")
+		}
+		return output.PrintDiff(r, diffArgs...)
+	}
+	return output.PrintDetails(r)
+}
+
+// showCmd defines the "show" subcommand.
+var showCmd = &Command{
+	Usage: func(arg0 string) {
+		fmt.Printf("Usage: %s show [<option>...] [<commit>]\n\nOptions:\n", arg0)
+		showFlagSet.PrintDefaults()
+	},
+	RunMethod: func(repo repository.Repo, args []string) error {
+		return showReview(repo, args)
+	},
+}