59 lines
1.7 KiB
Go
59 lines
1.7 KiB
Go
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// Licensed to Elasticsearch B.V. under one or more contributor
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// license agreements. See the NOTICE file distributed with
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// this work for additional information regarding copyright
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// ownership. Elasticsearch B.V. licenses this file to you under
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// the Apache License, Version 2.0 (the "License"); you may
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// 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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package cli
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import (
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"fmt"
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"os"
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"runtime/debug"
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"github.com/spf13/cobra"
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)
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func exitOnPanic() {
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if r := recover(); r != nil {
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fmt.Fprintf(os.Stderr, "panic: %s\n", r)
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debug.PrintStack()
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os.Exit(1)
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}
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}
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// RunWith wrap cli function with an error handler instead of having the code exit early.
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func RunWith(
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fn func(cmd *cobra.Command, args []string) error,
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) func(cmd *cobra.Command, args []string) {
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return func(cmd *cobra.Command, args []string) {
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defer exitOnPanic()
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if err := fn(cmd, args); err != nil {
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fmt.Fprintln(os.Stderr, err.Error())
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os.Exit(1)
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}
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}
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}
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// GetEnvOr return the value of the environment variable if the value is set, if its not set it will
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// return the default value.
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//
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// Note: if the value is set but it is an empty string we will return the empty string.
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func GetEnvOr(name, def string) string {
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if env, ok := os.LookupEnv(name); ok {
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return env
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}
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return def
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}
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