go-cli

Go CLI sample project

Info

Precedence

The precedence for flag value sources is as follows (highest to lowest):

1. Command line flag value from user
2. Environment variable from user (if specified)
3. Configuration file (if specified) [FilePath]
4. Environment variable (if specified) [EnvVar]
5. Default defined on the flag [Value]

Autocompletion

zsh example

go build examples/bash-completion.go
PROG=bash-completion source  <(bash-completion autocompletion zsh)
bash-completion
# now play with tab

BASH

Source the autocomplete-scripts/bash_autocomplete file in your .bashrc or .bash_profile file.

go build .
source <(go-cli autocompletion bash)
go-cli
# now play with tab

ZSH

Source the autocomplete-scripts/zsh_autocomplete file in your .zshrc file while setting the PROG variable to the name of your program.

go build .
PROG=go-cli source <(go-cli autocompletion zsh)
go-cli
# now play with tab

Links

• https://github.com/urfave/cli

Config

• https://medium.com/@felipedutratine/manage-config-in-golang-to-get-variables-from-file-and-env-variables-33d876887152
• https://github.com/Tkanos/gonfig
• https://github.com/spf13/viper

Collaterals

• https://flaviocopes.com/go-list-files/