/
history.go
81 lines (67 loc) · 1.95 KB
/
history.go
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// Copyright (c) 2015-2016 Couchbase, 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 (
"bufio"
"os"
"github.com/couchbase/query/errors"
"github.com/sbinet/liner"
)
func LoadHistory(liner *liner.State, dir string) (int, string) {
if dir != "" {
err_code, err_str := ReadHistoryFromFile(liner, dir+"/.cbq_history")
if err_code != 0 {
return err_code, err_str
}
}
return 0, ""
}
func UpdateHistory(liner *liner.State, dir, line string) (int, string) {
liner.AppendHistory(line)
if dir != "" {
err_code, err_str := WriteHistoryToFile(liner, dir+"/.cbq_history")
if err_code != 0 {
return err_code, err_str
}
}
return 0, ""
}
func WriteHistoryToFile(liner *liner.State, path string) (int, string) {
var err error
f, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
if err != nil {
return errors.FILE_OPEN, err.Error()
}
defer f.Close()
writer := bufio.NewWriter(f)
_, err = liner.WriteHistory(writer)
if err != nil {
return errors.WRITE_FILE, err.Error()
} else {
err = writer.Flush()
if err != nil {
return errors.WRITER_OUTPUT, err.Error()
}
}
return 0, ""
}
func ReadHistoryFromFile(liner *liner.State, path string) (int, string) {
var err error
f, err := os.Open(path)
if err != nil {
return errors.FILE_OPEN, err.Error()
}
defer f.Close()
reader := bufio.NewReader(f)
_, err = liner.ReadHistory(reader)
if err != nil {
return errors.READ_FILE, err.Error()
}
return 0, ""
}