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**This requires enabling the [`derive` feature flag][crate::_features].**
Git is an example of several common subcommand patterns.
Help:
```console
$ git-derive
? failed
A fictional versioning CLI
Usage: git-derive[EXE] <COMMAND>
Commands:
clone Clones repos
diff Compare two commits
push pushes things
add adds things
stash
help Print this message or the help of the given subcommand(s)
Options:
-h, --help Print help
$ git-derive help
A fictional versioning CLI
Usage: git-derive[EXE] <COMMAND>
Commands:
clone Clones repos
diff Compare two commits
push pushes things
add adds things
stash
help Print this message or the help of the given subcommand(s)
Options:
-h, --help Print help
$ git-derive help add
adds things
Usage: git-derive[EXE] add <PATH>...
Arguments:
<PATH>... Stuff to add
Options:
-h, --help Print help
```
A basic argument:
```console
$ git-derive add
? failed
adds things
Usage: git-derive[EXE] add <PATH>...
Arguments:
<PATH>... Stuff to add
Options:
-h, --help Print help
$ git-derive add Cargo.toml Cargo.lock
Adding ["Cargo.toml", "Cargo.lock"]
```
Default subcommand:
```console
$ git-derive stash -h
Usage: git-derive[EXE] stash [OPTIONS]
git-derive[EXE] stash <COMMAND>
Commands:
push
pop
apply
help Print this message or the help of the given subcommand(s)
Options:
-m, --message <MESSAGE>
-h, --help Print help
$ git-derive stash push -h
Usage: git-derive[EXE] stash push [OPTIONS]
Options:
-m, --message <MESSAGE>
-h, --help Print help
$ git-derive stash pop -h
Usage: git-derive[EXE] stash pop [STASH]
Arguments:
[STASH]
Options:
-h, --help Print help
$ git-derive stash -m "Prototype"
Pushing StashPushArgs { message: Some("Prototype") }
$ git-derive stash pop
Popping None
$ git-derive stash push -m "Prototype"
Pushing StashPushArgs { message: Some("Prototype") }
$ git-derive stash pop
Popping None
```
External subcommands:
```console
$ git-derive custom-tool arg1 --foo bar
Calling out to "custom-tool" with ["arg1", "--foo", "bar"]
```
Last argument:
```console
$ git-derive diff --help
Compare two commits
Usage: git-derive[EXE] diff [OPTIONS] [COMMIT] [COMMIT] [-- <PATH>]
Arguments:
[COMMIT]
[COMMIT]
[PATH]
Options:
--color[=<WHEN>] [default: auto] [possible values: always, auto, never]
-h, --help Print help
$ git-derive diff
Diffing stage..worktree (color=auto)
$ git-derive diff ./src
Diffing stage..worktree ./src (color=auto)
$ git-derive diff HEAD ./src
Diffing HEAD..worktree ./src (color=auto)
$ git-derive diff HEAD~~ -- HEAD
Diffing HEAD~~..worktree HEAD (color=auto)
$ git-derive diff --color
Diffing stage..worktree (color=always)
$ git-derive diff --color=never
Diffing stage..worktree (color=never)
```