/
alias.go
99 lines (78 loc) · 2.18 KB
/
alias.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 command
import (
"fmt"
"io"
"strings"
"github.com/couchbase/query/errors"
)
/* Alias Command */
type Alias struct {
ShellCommand
}
func (this *Alias) Name() string {
return "ALIAS"
}
func (this *Alias) CommandCompletion() bool {
return false
}
func (this *Alias) MinArgs() int {
return 2
}
func (this *Alias) MaxArgs() int {
return MAX_ALIASES
}
func (this *Alias) ExecCommand(args []string) (int, string) {
if len(args) > this.MaxArgs() {
return errors.TOO_MANY_ARGS, ""
} else if len(args) < this.MinArgs() {
if len(args) == 0 {
// \ALIAS without input args lists the aliases present.
if len(AliasCommand) == 0 {
return errors.NO_SUCH_ALIAS, ""
}
for k, v := range AliasCommand {
tmp := fmt.Sprintf("%-14s %-14s\n", k, v)
_, werr := io.WriteString(W, tmp)
if werr != nil {
return errors.WRITER_OUTPUT, werr.Error()
}
}
} else {
// Error out if it has 1 argument.
return errors.TOO_FEW_ARGS, ""
}
} else {
// Concatenate the elements of args with separator " "
// to give the input value
value := strings.Join(args[1:], " ")
//Add this to the map for Aliases
key := args[0]
//Aliases can be replaced.
if key != "" {
AliasCommand[key] = value
}
}
return 0, ""
}
func (this *Alias) PrintHelp(desc bool) (int, string) {
_, werr := io.WriteString(W, "\\ALIAS \n\\ALIAS <command name> <command>\n")
if desc {
err_code, err_str := printDesc(this.Name())
if err_code != 0 {
return err_code, err_str
}
}
_, werr = io.WriteString(W, "\n")
if werr != nil {
return errors.WRITER_OUTPUT, werr.Error()
}
return 0, ""
}