/
unpack.go
113 lines (100 loc) · 3.03 KB
/
unpack.go
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// Copyright (C) 2017 Google Inc.
//
// 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 main
import (
"context"
"flag"
"fmt"
"os"
"path/filepath"
"strings"
"github.com/golang/protobuf/proto"
"github.com/google/gapid/core/app"
"github.com/google/gapid/core/data/pack"
"github.com/google/gapid/core/log"
)
type unpackVerb struct{ UnpackFlags }
func init() {
verb := &unpackVerb{}
app.AddVerb(&app.Verb{
Name: "unpack",
ShortHelp: "Displays the raw protos in a protopack file",
Action: verb,
})
}
func (verb *unpackVerb) Run(ctx context.Context, flags flag.FlagSet) error {
if flags.NArg() != 1 {
app.Usage(ctx, "Exactly one protopack file expected, got %d", flags.NArg())
return nil
}
filepath, err := filepath.Abs(flags.Arg(0))
ctx = log.V{"filepath": filepath}.Bind(ctx)
if err != nil {
return log.Err(ctx, err, "Could not find capture file")
}
r, err := os.Open(filepath)
if err != nil {
return err
}
defer r.Close()
return pack.Read(ctx, r, unpacker{verb.Verbose, map[uint64]int{}}, true)
}
type unpacker struct {
Verbose bool
DepthOf map[uint64]int
}
func (u unpacker) BeginGroup(ctx context.Context, msg proto.Message, id uint64) error {
depth := 0
u.DepthOf[id] = depth
log.I(ctx, "%sBeginGroup(msg: %v, id: %v)", indent(depth), u.msgString(msg), id)
return nil
}
func (u unpacker) BeginChildGroup(ctx context.Context, msg proto.Message, id, parentID uint64) error {
depth := u.DepthOf[parentID] + 1
u.DepthOf[id] = depth
log.I(ctx, "%sBeginChildGroup(msg: %v, id: %v, parentID: %v)", indent(depth), u.msgString(msg), id, parentID)
return nil
}
func (u unpacker) EndGroup(ctx context.Context, id uint64) error {
depth := u.DepthOf[id]
delete(u.DepthOf, id)
log.I(ctx, "%sEndGroup(id: %v)", indent(depth), id)
return nil
}
func (u unpacker) Object(ctx context.Context, msg proto.Message) error {
depth := 0
log.I(ctx, "%sObject(msg: %v)", indent(depth), u.msgString(msg))
return nil
}
func (u unpacker) ChildObject(ctx context.Context, msg proto.Message, parentID uint64) error {
depth := u.DepthOf[parentID] + 1
log.I(ctx, "%sChildObject(msg: %v, parentID: %v)", indent(depth), u.msgString(msg), parentID)
return nil
}
func indent(depth int) string {
return strings.Repeat(" ", depth)
}
func (u *unpacker) msgString(msg proto.Message) string {
var str string
switch msg := msg.(type) {
case *pack.Dynamic:
str = fmt.Sprintf("%+v", msg)
default:
str = fmt.Sprintf("%T{%+v}", msg, msg)
}
if len(str) > 100 && !u.Verbose {
str = str[:97] + "..." // TODO: Consider unicode.
}
return str
}