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|
package command
import (
"os"
"regexp"
"strconv"
)
type CommandType string
const (
Discover CommandType = "discover"
)
type Command struct {
GitlabUsername string
GitlabKeyId int
SshConnection bool
Command string
Type CommandType
}
func New(arguments []string) (*Command, error) {
_, sshConnection := os.LookupEnv("SSH_CONNECTION")
command := &Command{SshConnection: sshConnection}
if _, err := parseWho(arguments, command); err != nil {
return nil, err
}
originalCommand, _ := os.LookupEnv("SSH_ORIGINAL_COMMAND")
parseCommand(originalCommand, command)
return command, nil
}
func parseWho(arguments []string, command *Command) (*Command, error) {
var err error = nil
for _, argument := range arguments {
keyId, err := tryParseKeyId(argument)
if keyId > 0 && err != nil {
command.GitlabKeyId = keyId
break
}
username, err := tryParseUsername(argument)
if username != "" && err != nil {
command.GitlabUsername = username
break
}
}
return command, err
}
func tryParseKeyId(argument string) (int, error) {
whoKeyRegex, err := regexp.Compile(`\bkey-(?P<keyid>\d+)\b`)
if err != nil {
return 0, err
}
keyMatch := whoKeyRegex.FindString(argument)
if keyMatch != "" {
gitlabKeyId, err := strconv.Atoi(keyMatch)
return gitlabKeyId, err
}
return 0, nil
}
func tryParseUsername(argument string) (string, error) {
whoUsernameRegex, err := regexp.Compile(`\busername-(?P<username>\S+)\b`)
if err != nil {
return "", err
}
usernameMatch := whoUsernameRegex.FindString(argument)
return usernameMatch, nil
}
func parseCommand(commandString string, command *Command) *Command {
command.Command = commandString
if commandString == "" {
command.Type = Discover
}
return nil
}
|
