105 lines
2.9 KiB
Rust
105 lines
2.9 KiB
Rust
//! Zebrad EntryPoint
|
|
|
|
use crate::{
|
|
commands::{StartCmd, ZebradCmd},
|
|
config::ZebradConfig,
|
|
};
|
|
|
|
use std::path::PathBuf;
|
|
|
|
use abscissa_core::{
|
|
command::{Command, Usage},
|
|
config::Configurable,
|
|
FrameworkError, Options, Runnable,
|
|
};
|
|
|
|
// (See https://docs.rs/abscissa_core/0.5.2/src/abscissa_core/command/entrypoint.rs.html)
|
|
/// Toplevel entrypoint command.
|
|
///
|
|
/// Handles obtaining toplevel help as well as verbosity settings.
|
|
#[derive(Debug, Options)]
|
|
pub struct EntryPoint {
|
|
/// Path to the configuration file
|
|
#[options(short = "c", help = "path to configuration file")]
|
|
pub config: Option<PathBuf>,
|
|
|
|
/// Obtain help about the current command
|
|
#[options(short = "h", help = "print help message")]
|
|
pub help: bool,
|
|
|
|
/// Increase verbosity setting
|
|
#[options(short = "v", help = "be verbose")]
|
|
pub verbose: bool,
|
|
|
|
/// Subcommand to execute.
|
|
///
|
|
/// The `command` option will delegate option parsing to the command type,
|
|
/// starting at the first free argument. Defaults to start.
|
|
#[options(command, default_expr = "Some(ZebradCmd::Start(StartCmd::default()))")]
|
|
pub command: Option<ZebradCmd>,
|
|
}
|
|
|
|
impl EntryPoint {
|
|
/// Borrow the underlying command type
|
|
fn command(&self) -> &ZebradCmd {
|
|
self.command
|
|
.as_ref()
|
|
.expect("Some(ZebradCmd::Start(StartCmd::default()) as default value")
|
|
}
|
|
}
|
|
|
|
impl Runnable for EntryPoint {
|
|
fn run(&self) {
|
|
self.command().run()
|
|
}
|
|
}
|
|
|
|
impl Command for EntryPoint {
|
|
/// Name of this program as a string
|
|
fn name() -> &'static str {
|
|
ZebradCmd::name()
|
|
}
|
|
|
|
/// Description of this program
|
|
fn description() -> &'static str {
|
|
ZebradCmd::description()
|
|
}
|
|
|
|
/// Version of this program
|
|
fn version() -> &'static str {
|
|
ZebradCmd::version()
|
|
}
|
|
|
|
/// Authors of this program
|
|
fn authors() -> &'static str {
|
|
ZebradCmd::authors()
|
|
}
|
|
|
|
/// Get usage information for a particular subcommand (if available)
|
|
fn subcommand_usage(command: &str) -> Option<Usage> {
|
|
ZebradCmd::subcommand_usage(command)
|
|
}
|
|
}
|
|
|
|
impl Configurable<ZebradConfig> for EntryPoint {
|
|
/// Path to the command's configuration file
|
|
fn config_path(&self) -> Option<PathBuf> {
|
|
match &self.config {
|
|
// Use explicit `-c`/`--config` argument if passed
|
|
Some(cfg) => Some(cfg.clone()),
|
|
|
|
// Otherwise defer to the toplevel command's config path logic
|
|
None => self.command.as_ref().and_then(|cmd| cmd.config_path()),
|
|
}
|
|
}
|
|
|
|
/// Process the configuration after it has been loaded, potentially
|
|
/// modifying it or returning an error if options are incompatible
|
|
fn process_config(&self, config: ZebradConfig) -> Result<ZebradConfig, FrameworkError> {
|
|
match &self.command {
|
|
Some(cmd) => cmd.process_config(config),
|
|
None => Ok(config),
|
|
}
|
|
}
|
|
}
|