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flags.go
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flags.go
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// Copyright (c) Facebook, Inc. and its affiliates.
//
// 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 (
"fmt"
"os"
"strconv"
"strings"
"time"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
"github.com/facebookincubator/nvdtools/vulndb"
"github.com/facebookincubator/nvdtools/vulndb/debug"
)
var (
// See https://github.com/go-sql-driver/mysql#dsn-data-source-name for DSN.
// And libfb/go/fbmysql for fbmysql DSN.
gFlagMySQL = os.Getenv("MYSQL")
// General purpose flags.
gFlagOwner = os.Getenv("USER")
gFlagCollector = ""
gFlagProvider = ""
gFlagMetadata = ""
gFlagFormat = "csv"
gFlagDeadline deadlineFlag
gFlagDeleteAll bool
gFlagCSVNoHeader = false
)
func init() {
fs := RootCmd.PersistentFlags()
fs.VarP(&debug.Level, "debug", "v", "set verbosity level")
}
func addRequiredFlags(cmd *cobra.Command, names ...string) {
addFlags(cmd, true, names...)
}
func addOptionalFlags(cmd *cobra.Command, names ...string) {
addFlags(cmd, false, names...)
}
func addFlags(cmd *cobra.Command, required bool, names ...string) {
for _, name := range names {
f, exists := supportedFlags[name]
if !exists {
panic("unsupported flag: " + name)
}
f(cmd.Flags())
if required {
// This requires calling fs.Set for flags that
// have a default value.
cmd.MarkFlagRequired(name)
}
}
}
var supportedFlags = map[string]func(*pflag.FlagSet){
"mysql": func(fs *pflag.FlagSet) {
fs.StringVar(&gFlagMySQL, "mysql", gFlagMySQL, "set mysql dsn (or use $MYSQL)")
if gFlagMySQL != "" {
fs.Set("mysql", gFlagMySQL)
}
},
"owner": func(fs *pflag.FlagSet) {
fs.StringVar(&gFlagOwner, "owner", gFlagOwner, "set owner of the records")
fs.Set("owner", gFlagOwner)
},
"collector": func(fs *pflag.FlagSet) {
fs.StringVar(&gFlagCollector, "collector", gFlagCollector, "set unique name of the data collector")
},
"provider": func(fs *pflag.FlagSet) {
fs.StringVar(&gFlagProvider, "provider", gFlagProvider, "set short name of the data provider")
},
"metadata": func(fs *pflag.FlagSet) {
fs.StringVar(&gFlagMetadata, "metadata", gFlagMetadata, "set metadata")
},
"format": func(fs *pflag.FlagSet) {
fs.StringVar(&gFlagFormat, "format", gFlagFormat, "set output format (csv or nvdcvejson)")
fs.Set("format", gFlagFormat)
},
"deadline": func(fs *pflag.FlagSet) {
fs.Var(&gFlagDeadline, "deadline", fmt.Sprintf("set deadline in absolute time or duration (e.g. %s or 24h, 30d)", vulndb.TimeLayout))
},
"delete_all": func(fs *pflag.FlagSet) {
fs.BoolVarP(&gFlagDeleteAll, "all", "a", gFlagDeleteAll, "delete all records from database")
},
"csv_noheader": func(fs *pflag.FlagSet) {
fs.BoolVarP(&gFlagCSVNoHeader, "csvnoheader", "n", gFlagCSVNoHeader, "omit csv header in output")
},
}
// deadlineFlag implements the pflag.Value interface.
type deadlineFlag struct {
Time time.Time
}
func (d *deadlineFlag) Type() string {
return "string"
}
func (d *deadlineFlag) String() string {
if d.Time.IsZero() {
return ""
}
return d.Time.String()
}
// Set sets v as the deadline's time. Takes same input as time.ParseDuration
// but supports using 'd' (e.g. 30d) for representing days as d*24h.
func (d *deadlineFlag) Set(v string) error {
t, err := vulndb.ParseTime(v)
if err == nil {
d.Time = t
return nil
}
dd, err := time.ParseDuration(v)
if err == nil {
d.Time = time.Now().Add(dd)
return nil
}
idx := strings.Index(v, "d")
if idx < 1 {
return fmt.Errorf("invalid deadline: %q", v)
}
n, err := strconv.Atoi(v[0:idx])
if err != nil {
return fmt.Errorf("invalid deadline: %q", v)
}
dd, _ = time.ParseDuration(strconv.Itoa(n*24) + "h")
d.Time = time.Now().Add(dd)
return nil
}