146 lines
4.6 KiB
Rust
146 lines
4.6 KiB
Rust
//! Zebrad Subcommands
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mod copy_state;
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mod download;
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mod generate;
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mod start;
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mod tip_height;
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mod version;
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use self::ZebradCmd::*;
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use self::{
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copy_state::CopyStateCmd, download::DownloadCmd, generate::GenerateCmd,
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tip_height::TipHeightCmd, version::VersionCmd,
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};
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pub use self::start::StartCmd;
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use crate::config::ZebradConfig;
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use abscissa_core::{
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config::Override, Command, Configurable, FrameworkError, Help, Options, Runnable,
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};
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use std::path::PathBuf;
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/// Zebrad Configuration Filename
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pub const CONFIG_FILE: &str = "zebrad.toml";
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/// Zebrad Subcommands
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#[derive(Command, Debug, Options)]
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pub enum ZebradCmd {
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/// The `copy-state` subcommand, used to debug cached chain state
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// TODO: hide this command from users in release builds (#3279)
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#[options(help = "copy cached chain state (debug only)")]
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CopyState(CopyStateCmd),
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/// The `download` subcommand
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#[options(help = "pre-download required parameter files")]
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Download(DownloadCmd),
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/// The `generate` subcommand
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#[options(help = "generate a skeleton configuration")]
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Generate(GenerateCmd),
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/// The `help` subcommand
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#[options(help = "get usage information, \
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use help <subcommand> for subcommand usage information, \
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or --help flag to see top-level options")]
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Help(Help<Self>),
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/// The `start` subcommand
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#[options(help = "start the application")]
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Start(StartCmd),
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/// The `tip-height` subcommand
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#[options(help = "get the block height of Zebra's persisted chain state")]
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TipHeight(TipHeightCmd),
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/// The `version` subcommand
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#[options(help = "display version information")]
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Version(VersionCmd),
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}
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impl ZebradCmd {
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/// Returns true if this command is a server command.
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///
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/// Servers load extra components, and use the configured tracing filter.
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///
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/// For example, `Start` acts as a Zcash node.
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pub(crate) fn is_server(&self) -> bool {
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// List all the commands, so new commands have to make a choice here
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match self {
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// Commands that run as a configured server
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CopyState(_) | Start(_) => true,
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// Utility commands that don't use server components
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Download(_) | Generate(_) | Help(_) | TipHeight(_) | Version(_) => false,
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}
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}
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/// Returns the default log level for this command, based on the `verbose` command line flag.
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///
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/// Some commands need to be quiet by default.
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pub(crate) fn default_tracing_filter(&self, verbose: bool, help: bool) -> &'static str {
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let only_show_warnings = match self {
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// Commands that generate quiet output by default.
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// This output:
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// - is used by automated tools, or
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// - needs to be read easily.
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Generate(_) | TipHeight(_) | Help(_) | Version(_) => true,
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// Commands that generate informative logging output by default.
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CopyState(_) | Download(_) | Start(_) => false,
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};
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// set to warn so that usage info is printed without info-level logs from component registration
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if help || (only_show_warnings && !verbose) {
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"warn"
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} else if only_show_warnings || !verbose {
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"info"
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} else {
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"debug"
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}
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}
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}
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impl Runnable for ZebradCmd {
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fn run(&self) {
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match self {
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CopyState(cmd) => cmd.run(),
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Download(cmd) => cmd.run(),
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Generate(cmd) => cmd.run(),
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ZebradCmd::Help(cmd) => cmd.run(),
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Start(cmd) => cmd.run(),
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TipHeight(cmd) => cmd.run(),
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Version(cmd) => cmd.run(),
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}
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}
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}
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/// This trait allows you to define how application configuration is loaded.
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impl Configurable<ZebradConfig> for ZebradCmd {
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/// Location of the configuration file
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fn config_path(&self) -> Option<PathBuf> {
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let if_exists = |f: PathBuf| if f.exists() { Some(f) } else { None };
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dirs::preference_dir()
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.map(|path| path.join(CONFIG_FILE))
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.and_then(if_exists)
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// Note: Changes in how configuration is loaded may need usage
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// edits in generate.rs
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}
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/// Apply changes to the config after it's been loaded, e.g. overriding
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/// values in a config file using command-line options.
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///
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/// This can be safely deleted if you don't want to override config
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/// settings from command-line options.
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fn process_config(&self, config: ZebradConfig) -> Result<ZebradConfig, FrameworkError> {
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match self {
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ZebradCmd::Start(cmd) => cmd.override_config(config),
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_ => Ok(config),
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}
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}
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}
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