78 lines
2.8 KiB
Go
78 lines
2.8 KiB
Go
/*
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Copyright 2017 the Heptio Ark contributors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package flag
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import (
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"github.com/golang/glog"
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"github.com/spf13/cobra"
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)
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// GetOptionalStringFlag returns the value of the specified flag from a
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// cobra command, or the zero value ("") if the flag was not specified.
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func GetOptionalStringFlag(cmd *cobra.Command, flagName string) string {
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return GetStringFlag(cmd, flagName, false)
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}
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// GetStringFlag returns the value of the specified flag from a
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// cobra command. If the flag is not specified and fatalIfMissing is true,
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// this function logs a fatal error and calls os.Exit(255).
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func GetStringFlag(cmd *cobra.Command, flagName string, fatalIfMissing bool) string {
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s, err := cmd.Flags().GetString(flagName)
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if err != nil && fatalIfMissing {
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glog.Fatalf("error accessing flag %q for command %s: %v", flagName, cmd.Name(), err)
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}
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return s
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}
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// GetOptionalBoolFlag returns the value of the specified flag from a
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// cobra command, or the zero value (false) if the flag was not specified.
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func GetOptionalBoolFlag(cmd *cobra.Command, flagName string) bool {
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return GetBoolFlag(cmd, flagName, false)
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}
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// GetBoolFlag returns the value of the specified flag from a
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// cobra command. If the flag is not specified and fatalIfMissing is true,
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// this function logs a fatal error and calls os.Exit(255).
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func GetBoolFlag(cmd *cobra.Command, flagName string, fatalIfMissing bool) bool {
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b, err := cmd.Flags().GetBool(flagName)
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if err != nil && fatalIfMissing {
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glog.Fatalf("error accessing flag %q for command %s: %v", flagName, cmd.Name(), err)
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}
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return b
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}
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// GetOptionalStringArrayFlag returns the value of the specified flag from a
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// cobra command, or the zero value if the flag was not specified.
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func GetOptionalStringArrayFlag(cmd *cobra.Command, flagName string) []string {
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return GetStringArrayFlag(cmd, flagName, false)
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}
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// GetStringArrayFlag returns the value of the specified flag from a
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// cobra command. If the flag is not specified and fatalIfMissing is true,
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// this function logs a fatal error and calls os.Exit(255).
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func GetStringArrayFlag(cmd *cobra.Command, flagName string, fatalIfMissing bool) []string {
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f := cmd.Flag(flagName)
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if f == nil {
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if fatalIfMissing {
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glog.Fatalf("error accessing flag %q for command %s: not specified", flagName, cmd.Name())
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}
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return []string{}
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}
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v := f.Value.(*StringArray)
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return *v
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}
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