mirror of
https://github.com/clap-rs/clap
synced 2024-12-14 23:02:31 +00:00
647896d929
This is the derive support for #3774 (see also #3775, #3777) This combined with `value_parser` replaces `parser`. The main frustration with this is that `ArgAction::Count` (the replacement for `parse(from_occurrences)` must be a `u64`. We could come up with a magic attribute that is meant to be the value parser's parsed type. We could then use `TryFrom` to convert the parsed type to the user's type to allow more. That is an exercise for the future. Alternatively, we have #3792. Prep for this included - #3782 - #3783 - #3786 - #3789 - #3793
93 lines
2.7 KiB
Rust
93 lines
2.7 KiB
Rust
use clap::{CommandFactory, ErrorKind, Parser};
|
|
|
|
#[derive(Parser)]
|
|
#[clap(author, version, about, long_about = None)]
|
|
struct Cli {
|
|
/// set version manually
|
|
#[clap(long, value_name = "VER", value_parser)]
|
|
set_ver: Option<String>,
|
|
|
|
/// auto inc major
|
|
#[clap(long, action)]
|
|
major: bool,
|
|
|
|
/// auto inc minor
|
|
#[clap(long, action)]
|
|
minor: bool,
|
|
|
|
/// auto inc patch
|
|
#[clap(long, action)]
|
|
patch: bool,
|
|
|
|
/// some regular input
|
|
#[clap(value_parser)]
|
|
input_file: Option<String>,
|
|
|
|
/// some special input argument
|
|
#[clap(long, value_parser)]
|
|
spec_in: Option<String>,
|
|
|
|
#[clap(short, value_parser)]
|
|
config: Option<String>,
|
|
}
|
|
|
|
fn main() {
|
|
let cli = Cli::parse();
|
|
|
|
// Let's assume the old version 1.2.3
|
|
let mut major = 1;
|
|
let mut minor = 2;
|
|
let mut patch = 3;
|
|
|
|
// See if --set-ver was used to set the version manually
|
|
let version = if let Some(ver) = cli.set_ver.as_deref() {
|
|
if cli.major || cli.minor || cli.patch {
|
|
let mut cmd = Cli::command();
|
|
cmd.error(
|
|
ErrorKind::ArgumentConflict,
|
|
"Can't do relative and absolute version change",
|
|
)
|
|
.exit();
|
|
}
|
|
ver.to_string()
|
|
} else {
|
|
// Increment the one requested (in a real program, we'd reset the lower numbers)
|
|
let (maj, min, pat) = (cli.major, cli.minor, cli.patch);
|
|
match (maj, min, pat) {
|
|
(true, false, false) => major += 1,
|
|
(false, true, false) => minor += 1,
|
|
(false, false, true) => patch += 1,
|
|
_ => {
|
|
let mut cmd = Cli::command();
|
|
cmd.error(
|
|
ErrorKind::ArgumentConflict,
|
|
"Can only modify one version field",
|
|
)
|
|
.exit();
|
|
}
|
|
};
|
|
format!("{}.{}.{}", major, minor, patch)
|
|
};
|
|
|
|
println!("Version: {}", version);
|
|
|
|
// Check for usage of -c
|
|
if let Some(config) = cli.config.as_deref() {
|
|
// todo: remove `#[allow(clippy::or_fun_call)]` lint when MSRV is bumped.
|
|
#[allow(clippy::or_fun_call)]
|
|
let input = cli
|
|
.input_file
|
|
.as_deref()
|
|
// 'or' is preferred to 'or_else' here since `Option::as_deref` is 'const'
|
|
.or(cli.spec_in.as_deref())
|
|
.unwrap_or_else(|| {
|
|
let mut cmd = Cli::command();
|
|
cmd.error(
|
|
ErrorKind::MissingRequiredArgument,
|
|
"INPUT_FILE or --spec-in is required when using --config",
|
|
)
|
|
.exit()
|
|
});
|
|
println!("Doing work using input {} and config {}", input, config);
|
|
}
|
|
}
|