Urfave cli help. md Installation Make sure you have a working Go environment.

Urfave cli help Jun 1, 2023 · We've written a lightweight cli wrapper for handling database migration using urfave/cli. Context to cmd *cli. Go version 1. April 6, 2025 Sep 2, 2022 · So I made a simple cli app and everytime I run it, even if all the parameters were provided, the help info is being printed first and after the app executes. Commands)) 可以对命令按名字排序。 命令的分类 同级的命令中可以通过增加 Category 对命令进行分类（同类命令在展示时会再一个类下显示）。 例如： v2 Arguments You can lookup arguments by calling the Args function on cli. The Urfave CLI package From V2 manual. I spent an hour trying to fix this just now but ran into dependency initialisation loops. Use of one's imagination is encouraged. 7k Star 22. It supports commands, subcommands, flags, automatic help system, dynamic shell completion and generation of markdown documentation. This all runs pre command invocation (even in --help scenarios). go at main · urfave/cli Migration Guide: v1 to v2 v2 has a number of breaking changes but converting is relatively straightforward: make the changes documented below then resolve any compiler errors. So these validators need to focus only on validating the value, whether it be within a certain range or picked from a fixed number of values. My urfave/cli version is v3. cli makes command line programming fun, organized, and expressive! Subcommands Subcommands can be defined for a more git-like command line app. Oct 29, 2015 · Default message/action when subcommand is invalid? · Issue #293 · urfave/cli · GitHub urfave /Public Notifications You must be signed in to change notification settings Fork 1. typeArgSpecinterface { // Name returns the name that this arg will be accessed byName () string// Required returns true if this arg is required Required () bool// Priority means the order Aug 15, 2022 · v2 Suggestions To enable flag and command suggestions, set app. While HideHelp hides both help command and --help flag, HideHelpCommand only hides help command and leave --help flag as-is in urfave/cli/pull/1083 via @AkihiroSuda Added timestampFlag docs in urfave/cli/pull/997 via @drov0 Added required flags documentation in urfave/cli/pull/1008 via @lynncyrin, @anberns Dec 2, 2023 · Migrating From Older Releases There are a small set of breaking changes between v1 and v3. Sourcing the completion script for that particular shell. Aug 9, 2025 · v3 Advanced Alternate Names You can set alternate (or short) names for flags by providing a list of strings for Aliases e. 27. Did you check the manual for your release? The v2 manual is here Did you perform a sea Subcommands (Categories) For additional organization in apps that have many subcommands, you can associate a category for each command to group them together in the help output. HelpFlag and is checked by the cli internals in order to print generated help text for the app, command, or subcommand, and break execution. Full API Example Notice: This is a contrived (functioning) example meant strictly for API demonstration purposes. : $ greet help NAME: greet - fight the loneliness! USAGE: greet [global options] command [command options] [arguments] COMMANDS: help, h Shows a list of commands or help for one command GLOBAL OPTIONS --help, -h show help (default: false) Subcommands Subcommands can be defined for a more git-like command line app. EnvVars. Oct 10, 2025 · The urfave/cli project provides a declarative framework for building command line applications in Go. $ greet help NAME: greet - fight the loneliness! USAGE: greet [global options] command [command options] [arguments] VERSION: 0. If the suggest feature is enabled, then the help output of the corresponding command will provide an appropriate suggestion for the provided flag or subcommand if available. This way I have base config from file & env, then flags can override/extend this config, and I have a unified interface for fetching config. Command, which also by extension changes some of the possible implementation, i. 8k v2 Full API Example Notice: This is a contrived (functioning) example meant strictly for API demonstration purposes. cli makes command line programming fun, organized, and expressive! A declarative, simple, fast, and fun package for building command line tools in Go - urfave/cli Oct 18, 2015 · When processing the flags for -h/--help and -v/--version, only check the flags in checkVersion () and checkHelp () instead of also printing the associated message. Welcome to urfave/cli urfave/cli is a declarative, simple, fast, and fun package for building command line tools in Go featuring: commands and subcommands with alias and prefix match support flexible and permissive help system dynamic shell completion for bash, zsh, fish, and powershell no dependencies except Go standard library input flags for simple types, slices of simple types, time Sep 30, 2022 · Skip to content urfave/cli v3 guide Initializing search GitHub Home v3 Manual v2 Manual v1 Manual Getting Started One of the philosophies behind cli is that an API should be playful and full of discovery. So a cli app can be as little as one line of code in main(). VersionPrinter and break execution. v2 Getting Started One of the philosophies behind cli is that an API should be playful and full of discovery. com/urfave/cli to create a CLI with two subcommands. Arguments property. Specific steps are included in Migration Guide: v2 to v3. As such, I seem to be able to pipe errors back through to chat, but a lot of commands still print the default help to the A declarative, simple, fast, and fun package for building command line tools in Go - urfave/cli Sep 8, 2016 · If run cli --help or cli --help subcmd, the Before function won't be run and fine! But, if I run cli subcmd --help the Before will get executed while I'm still only interested in seeing the help for subcommand! The Before function should actually be executed before any subcommand, but not when I Migration Guide: v2 to v3 v3 has a number of breaking changes but converting is relatively straightforward: make the changes documented below then resolve any compiler errors. As a general guiding principle, the current maintainers may be notified via the @urfave/cli GitHub team. : Also, assuming stacks has subcommands, cli help stacks doesn't mention the fact, but cli stacks help does. 0 Jun 25, 2019 · I am using urfave/cli to build a CLI application in Go. Documentation More documentation is available in . December 2, 2023 My urfave/cli version is 2. 5 Checklist Are you running the latest v2 release? The list of releases is here. This is where cli comes into play. Advanced The [Basics] showed how to access arguments for a command. 3. 18+ is supported Apr 1, 2025 · The signature of cli. Nov 15, 2021 · Pass resource from Command To Subcommands in urfave/cli/v2 Asked 3 years, 11 months ago Modified 3 years, 11 months ago Viewed 2k times Nov 12, 2023 · 参考资料 urfave cli 官网： https://cli. This allows you to change the behaviour of the app depending on what argument has been passed. : Command line apps are usually so tiny that there is absolutely no reason why your code should not be self-documenting. Context, e. Also see the pkg. 0 COMMANDS: help, h Shows a list of commands or help for one command GLOBAL OPTIONS --version Shows version information Feb 11, 2025 · Hi Guys please could you clarify the idea behind Command. Jul 16, 2024 · You can also set a destination variable for a flag, to which the content will be scanned. FilePath) take precedence over default values set from the environment (e. Currently supported input source formats: * YAML * JSON * TOML In order to get values for a flag Jun 14, 2025 · cli cli is a simple, fast, and fun package for building command line apps in Go. May 20, 2024 · Welcome to urfave/cli urfave/cli is a declarative, simple, fast, and fun package for building command line tools in Go featuring: commands and subcommands with alias and prefix match support flexible and permissive help system dynamic shell completion for bash, zsh, fish, and powershell man and markdown format documentation generation input flags for simple types, slices of simple types, time Jul 16, 2024 · Let’s jump in! Comparing CLI Frameworks urfave/cli vs. Did you check the manual for your release? The v2 manual is here Did you perform a sea A declarative, simple, fast, and fun package for building command line tools in Go - urfave/cli Mar 13, 2023 · My urfave/cli version is v2. The doubling was caused by printing the message once for each registred alias for the given flags (-h/--help and -v/--version). Did this work in the past for you and are you using v1 or v2? The default help flag (-h/--help) is defined as cli. Setting and querying flags is done using the cmd. Note that if the Value is set for the flag, it will be shown as default, and destination will be set to this value before parsing flag on the command line. Validation cannot be used to check slice/map Sep 5, 2016 · Is it possible to use cli for tools without subcommands? Currently the help always prints out something like this in the usage: scratch [global options] command [command options] [arguments] Is there anyway to get rid of the help comm Command line apps are usually so tiny that there is absolutely no reason why your code should not be self-documenting. 0 Describe the bug Flag default value should never change in help output. Feb 26, 2017 · Option values often only support a limited set of valid values. If you find any issues not covered by this document, please post a comment on the discussion or consider sending a PR to help improve this guide. VersionFlag, e. But if I want to run it as a kubernetes job it's failing. com Jun 22, 2024 · The urfave/cli package is a comprehensive toolkit for building CLI applications in Go. $ greet help NAME: greet - fight the loneliness! USAGE: greet [global options] GLOBAL OPTIONS: --help, -h show help Releasing urfave/cli Releasing small batches often is backed by research as part of the virtuous cycles that keep teams and products healthy. I've been often overwhelmed by the sheer size and complexity of this package, considering that the 'official' documentat It’s simple, has command hooks (great for db connection/cleanup), typed flags with defaults, file flag helpers, and encourages you to have a really clean and readable cli entrypoint. Did you check the manual for your release? The v2 manual is here Did you perform a se Jun 20, 2014 · When I run cli help, I get the global help template with commands and global flags, and when running cli help command I again get the help template with description and command specific flag options, but I can't seem to find anyway on getting help with sub-commands of a command. Command, e. CommandsByName(app. Version. You can customize it by setting Categories For additional organization in apps that have many subcommands, you can associate a category for each command to group them together in the help output, e. See also video. You can lookup arguments by calling the Args function on cli. To that end, the overall goal of the release process is to send changes out into the world as close to the time the commits were merged to the main branch as possible. go. One of the most popular is urfave/cli. Usage Documentation Usage documentation for v1 is available at the docs site or in-tree at . What I would like is options given after the first command to be treated as arguments and not flags (so that I can handle them myself or pass them to an other executable). The goal is to enable developers to write fast and distributable command line applications in an expressive way. Actually my use case is a command with one required positional argument app command <required-position-argument> So with Nov 20, 2020 · my urfave/cli version is v2. The value of the argument can be retrieved using the Apr 6, 2025 · v2 Migrating to v3 There are a small set of breaking changes between v2 and v3. EnvVar). Things like generating help text and parsing command flags/options should not hinder productivity when writing a command line app. Flags before args In v2 Feb 27, 2025 · Hi there 👋 I'm currently using v3 to do some quick & dirty CLI applications. Feb 27, 2019 · I am using urfave at https://github. It's working fine as a standalone app. They are all retrieved as strings which is fine but it we need to say get integers or timestamps the user would have to convert from string to desired type. v3 Generated Help Text The default help flag (-h/--help) is defined as cli. To reproduce Build the following program against v2. : Jun 5, 2020 · I am using the library to handle incoming message from a chat application. Cobra Before we commit to using Cobra, it’s essential to compare it against to other popular CLI frameworks. Converting is relatively straightforward and typically takes less than an hour. e. Customization All of the help text generation may be customized, and at multiple levels. Did you check the manual for your release? The v2 manual is here Did you perform a se In addition there is a urfave/cli-altsrc repo which hosts some common value sources to read from files or via http/https. v2 Bash Completions You can enable completion commands by setting the EnableBashCompletion flag on the App object to true. It would be helpful to have CLI enforce valid options and auto generate help docs listing valid options. 0. com/photoprism/photoprism # 简介 cli 是一个用于构建命令行程序的库。 # 快速开始 安装 cli 库，有 v1 和 v2 两个版本。 如果没有特殊需求，一般安装 v2 Repositories cli Public A declarative, simple, fast, and fun package for building command line tools in Go Go 23,697 MIT 1,758 46 (7 issues need help) 9 Updated 2 days ago cli-altsrc Public Read values for urfave/cli/v3 flags from config files Go 33 MIT 6 3 1 Updated 3 days ago A declarative, simple, fast, and fun package for building command line tools in Go - cli/examples_test. August 15, 2022 v2 Version Flag The default version flag (-v/--version) is defined as cli. /docs/v1/manual. This is my Basics Subcommands can be defined for a more git-like command line app. 1 Checklist Are you running the latest v2 release? The list of releases is here. Mar 30, 2025 · Suggestions To enable flag and command suggestions, set Command. 17. Values from alternate input sources (YAML, TOML, and others) There is a separate package altsrc that adds support for getting flag values from other file input sources. <FlagType>(<flagName>) function Here is an example of using a StringFlag which accepts a string as its option value Aug 15, 2022 · v1 Version Flag The default version flag (-v/--version) is defined as cli. Automatically reading from alternative sourcesI basically want to read from Koanf using the Command's Name, as a way of centralising all of the config from the Koanf (which leverages env & file providers), and I also write back to it in the Before hook. This is useful if you want to put the usage of CLI built with urfave/cli/v3 into the document. 25. clx. go Jul 22, 2013 · Added HideHelpCommand. This fixes the problem of `app -h` and `app -v` printing their output twice. New Import Jun 11, 2024 · Note that default values set from file (e. There would many structs that implement this interface, like those for parsing flags. Dec 8, 2022 · urfave / cli Public Notifications You must be signed in to change notification settings Fork 1. Oct 3, 2023 · The urfave/cli is a simple and fast package for building command line applications in Go. About Go library to show the help of all commands of CLIs built with urfave/cli/v2 Sep 10, 2021 · Is there a way to set a custom help template for subcommands? I know it's totally possible to set custom templates for the app (CustomAppHelpTemplate) and for commands (CustomHelpTemplate) but I ca Aug 12, 2015 · Hi, Is it possible to somehow print help manually from inside of particular command/subcommand? My use case is with commands that should work only when proper set of flags was passed - otherwise he Jan 27, 2019 · Is this specific to bool commands only for you? In an example I mocked up they don't pass through for any flags that are at the global level. Feb 16, 2021 · my urfave/cli version is v2. According to the repository’s README, this library offers commands and subcommands with alias support, dynamic shell completion for multiple shells, and a flexible help system while maintaining zero dependencies beyond the Go standard library. dev docs for v3 API documentation. By default, this setting will allow auto v3 Basics Flags, also called options, can be used to control various behaviour of the app by turning on/off capabilities or setting some configuration and so on. Customize a completion command By default, a completion command is hidden, meaning the command isn't included in the help message. e. Sort(cli. Validation in urfave/cli is run only after the value has been converted from a string to the flag value type. go at main · urfave/cli Jun 11, 2024 · Added ¶ Added destination field to StringSliceFlag in urfave/cli/pull/1078 via @davidsbond Added HideHelpCommand. md Installation Make sure you have a working Go environment. Apr 10, 2023 · Just a rough take on the idea to hook into urfave/cli 's bootstraping logic and move any imperative bits into urfave/cli 's declarative structure. Did you check the manual for your release? The v2 manual is here Did you perform a sea. VersionPrinter has changed from taking ctx *cli. Jun 14, 2025 · cli cli is a simple, fast, and fun package for building command line apps in Go. This time I would like to iterate over all the flags created and see what is the default value for all of the flags created irrespective of the fact that it has been set or not on the command line. Related Go CLI resources. In this way, the community of humans depending on this library are able to make use of A simple, fast, and fun package for building command line apps in Go - cli/help. Welcome to urfave/cli urfave/cli is a declarative, simple, fast, and fun package for building command line tools in Go featuring: The urfave/cli searches for this flag and activates a different flow for command paths than regular flow The following shells are supported bash zsh fish powershell Enabling auto complete requires 2 things Setting the EnableShellCompletion field on root Command object to true. App. I Arguments You can lookup arguments by calling the Args function on cli. com/urfave/cli photoprism (cli 用法参考) : https://github. Did you check the manual for your release? The v3 manual is here Did you perform a sea Oct 24, 2024 · My urfave/cli version is v2. The templates are exposed as variables RootCommandHelpTemplate, CommandHelpTemplate, and 4 days ago · Welcome to urfave/cli urfave/cli is a declarative, simple, fast, and fun package for building command line tools in Go featuring: commands and subcommands with alias and prefix match support flexible and permissive help system dynamic shell completion for bash, zsh, fish, and powershell no dependencies except Go standard library input flags for simple types, slices of simple types, time The default help flag (-h/--help) is defined as cli. While HideHelp hides both help command and --help flag, HideHelpCommand only hides help command and leave --help flag as-is in urfave/cli/pull/1083 via @AkihiroSuda Added timestampFlag docs in urfave/cli/pull/997 via @drov0 Added required flags documentation in urfave/cli/pull Contributing Contributing Welcome to the urfave/cli contributor docs! This goal of this document is to help those interested in joining the 200+ humans who have contributed to this project over the years. 0 Checklist Are you running the latest v2 release? The list of releases is here. org/ urfave cli github: https://github. Library with additional validators for flag validation feature of urfave/cli (current for v3 only). VersionFlag, which is checked by the cli internals in order to print the App. Customization The default flag may be customized to something other than -v/--version by setting cli. Basics Lets add some arguments to our greeter app. 8k Insights Mar 15, 2023 · My urfave/cli version is 2. This comparison will help determine which framework aligns best with the needs of your project. : A declarative, simple, fast, and fun package for building command line tools in Go - FuZhouhao/urfave-cli Feb 1, 2024 · Very new to Go and the library to learn command line arguments I am using is urfave/cli. Additionally I don't see any output for global flags in the help template for sub commands. If you find any issues not covered by this document, please post a comment on Issue 921 or consider sending a PR to help improve this guide. We hope this will be sufficient for most typical users. Minimal main. It simplifies handling commands, options, and subcommands, providing a structured way to create complex CLI tools. To ease the burden on users the cli library offers predefined {Type}Arg and {Type}Args structure to faciliate this. org. E. I am able to create a CLI with a subcommand, but I really have no idea how to define the flags. Is there a way to only show the help menu when an arguments is missing/wrong or when you explicitly set the help flag to be displayed? Thanks. Version is now cmd. g. v2 Subcommands Categories For additional organization in apps that have many subcommands, you can associate a category for each command to group them together in the help output, e. Resolves urfave#285 Aug 11, 2017 · The default help flag (-h/--help) is defined as cli. Apr 1, 2025 · A Go library to show the help of all commands of CLIs built with urfave/cli/v3. : Aug 6, 2019 · The default help flag (-h/--help) is defined as cli. Run之前调用 sort. License See LICENSE Generated Help Text The default help flag (-h/--help) is defined as cli. Feb 24, 2020 · Solution description Add a new field to App and Command called Args of type []ArgSpec which is an interface like Flag. : Sep 6, 2023 · help, h Shows a list of commands or help for one command 命令的排序 通过在代码中app. Version via cli. Welcome to urfave/cli urfave/cli is a declarative, simple, fast, and fun package for building command line tools in Go featuring: commands and subcommands with alias and prefix match support flexible and permissive help system dynamic shell completion for bash, zsh, fish, and powershell man and markdown format documentation generation input flags for simple types, slices of simple types, time See full list on github. 2 Checklist Are you running the latest v3 release? The list of releases is here. /docs or the hosted documentation site at https://cli. urfave. Suggest = true. YAML JSON TOML Values from the Environment To set a value from the environment use cli. March 30, 2025 Getting Started One of the philosophies behind cli is that an API should be playful and full of discovery. pdndm iihx dieg smroosc sdew iyevxa pwbwlqg pyjjygvt irna oeduc pykzx ddphvs vwlikg giissmc wxrhrfi