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file_log.go
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file_log.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 transform
import (
"context"
"fmt"
"os"
"github.com/google/gapid/core/log"
"github.com/google/gapid/gapis/api"
"github.com/google/gapid/gapis/config"
)
type fileLog struct {
file *os.File
}
// NewFileLog returns a Transformer that will log all commands passed through it
// to the text file at path.
func NewFileLog(ctx context.Context, path string) Transformer {
f, err := os.Create(path)
if err != nil {
log.E(ctx, "Failed to create replay log file %v: %v", path, err)
return nil
}
return &fileLog{file: f}
}
func (t *fileLog) Transform(ctx context.Context, id api.CmdID, cmd api.Cmd, out Writer) error {
if cmd.API() != nil {
t.file.WriteString(fmt.Sprintf("%v: %v\n", id, cmd))
} else {
t.file.WriteString(fmt.Sprintf("%T\n", cmd))
}
if config.LogExtrasInTransforms {
if extras := cmd.Extras(); extras != nil {
for _, e := range extras.All() {
if o, ok := e.(*api.CmdObservations); ok {
if config.LogMemoryInExtras {
t.file.WriteString(o.DataString(ctx))
} else {
t.file.WriteString(o.String())
}
} else {
t.file.WriteString(fmt.Sprintf("[extra] %T: %v\n", e, e))
}
}
}
}
return out.MutateAndWrite(ctx, id, cmd)
}
func (t *fileLog) Flush(ctx context.Context, out Writer) error {
t.file.Close()
return nil
}
func (t *fileLog) PreLoop(ctx context.Context, output Writer) {
// Bypass the preloop to the next
output.NotifyPreLoop(ctx)
}
func (t *fileLog) PostLoop(ctx context.Context, output Writer) {
// Bypass the PostLoop to the next
output.NotifyPostLoop(ctx)
}
func (t *fileLog) BuffersCommands() bool { return false }