80 lines
1.8 KiB
Markdown
80 lines
1.8 KiB
Markdown
[`pacman`](https://wiki.archlinux.org/index.php/pacman) defines subcommands via flags.
|
|
|
|
Here, `-S` is a short flag subcommand:
|
|
```console
|
|
$ pacman -S package
|
|
Installing package...
|
|
|
|
```
|
|
|
|
Here `--sync` is a long flag subcommand:
|
|
```console
|
|
$ pacman --sync package
|
|
Installing package...
|
|
|
|
```
|
|
|
|
Now the short flag subcommand (`-S`) with a long flag:
|
|
```console
|
|
$ pacman -S --search name
|
|
Searching for name...
|
|
|
|
```
|
|
|
|
And the various forms of short flags that work:
|
|
```console
|
|
$ pacman -S -s name
|
|
Searching for name...
|
|
|
|
$ pacman -Ss name
|
|
Searching for name...
|
|
|
|
```
|
|
*(users can "stack" short subcommands with short flags or with other short flag subcommands)*
|
|
|
|
In the help, this looks like:
|
|
```console
|
|
$ pacman -h
|
|
package manager utility
|
|
|
|
Usage: pacman[EXE] <COMMAND>
|
|
|
|
Commands:
|
|
query, -Q, --query Query the package database.
|
|
sync, -S, --sync Synchronize packages.
|
|
help Print this message or the help of the given subcommand(s)
|
|
|
|
Options:
|
|
-h, --help Print help
|
|
-V, --version Print version
|
|
|
|
$ pacman -S -h
|
|
Synchronize packages.
|
|
|
|
Usage: pacman[EXE] {sync|--sync|-S} [OPTIONS] [package]...
|
|
|
|
Arguments:
|
|
[package]... packages
|
|
|
|
Options:
|
|
-s, --search <search>... search remote repositories for matching strings
|
|
-i, --info view package information
|
|
-h, --help Print help
|
|
|
|
```
|
|
|
|
And errors:
|
|
```console
|
|
$ pacman -S -s foo -i bar
|
|
? failed
|
|
error: the argument '--search <search>...' cannot be used with '--info'
|
|
|
|
Usage: pacman[EXE] {sync|--sync|-S} --search <search>... <package>...
|
|
|
|
For more information, try '--help'.
|
|
|
|
```
|
|
|
|
**NOTE:** Keep in mind that subcommands, flags, and long flags are *case sensitive*: `-Q` and `-q` are different flags/subcommands. For example, you can have both `-Q` subcommand and `-q` flag, and they will be properly disambiguated.
|
|
Let's make a quick program to illustrate.
|