upstream/mercurial-mirror Files · rust/rhg/src/commands/config.rs

rust-index: use interior mutability in head revs and caches...

rust-index: use interior mutability in head revs and caches For upcoming changes in `hg-cpython` switching to the `hg-core` index in ancestors iterators, we will need to avoid excessive mutability, restricting the use of mutable references on `hg::index::Index` to methods that actually logically mutate it, whereas the maintenance of caches such as `head_revs` clearly does not. We illustrate that immediately by switching to immutable borrows in the corresponding methods of `hg-cpython::MixedIndex`

Raphaël Gomès - - Load All Authors

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             config.rs
        
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             | 1.0 KiB
            
                | application/rls-services+xml
            
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             / rust / rhg / src / commands / config.rs
          
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      use crate::error::CommandError;

      use clap::Arg;

      use format_bytes::format_bytes;

      use hg::errors::HgError;

      use hg::utils::SliceExt;

      pub const HELP_TEXT: &str = "

      With one argument of the form section.name, print just the value of that config item.

      ";

      pub fn args() -> clap::Command {

          clap::command!("config")

              .arg(

                  Arg::new("name")

                      .help("the section.name to print")

                      .value_name("NAME")

                      .required(true),

              )

              .about(HELP_TEXT)

      }

      pub fn run(invocation: &crate::CliInvocation) -> Result<(), CommandError> {

          let (section, name) = invocation

              .subcommand_args

              .get_one::<String>("name")

              .expect("missing required CLI argument")

              .as_bytes()

              .split_2(b'.')

              .ok_or_else(|| HgError::unsupported("hg config <section>"))?;

          if let Some(value) = invocation.config.get(section, name) {

              invocation.ui.write_stdout(&format_bytes!(b"{}\n", value))?;

              Ok(())

          } else {

              Err(CommandError::Unsuccessful)

          }

      }

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				use crate::error::CommandError;
				use clap::Arg;
				use format_bytes::format_bytes;
				use hg::errors::HgError;
				use hg::utils::SliceExt;

				pub const HELP_TEXT: &str = "
				With one argument of the form section.name, print just the value of that config item.
				";

				pub fn args() -> clap::Command {
				clap::command!("config")
				.arg(
				Arg::new("name")
				.help("the section.name to print")
				.value_name("NAME")
				.required(true),
				)
				.about(HELP_TEXT)
				}

				pub fn run(invocation: &crate::CliInvocation) -> Result<(), CommandError> {
				let (section, name) = invocation
				.subcommand_args
				.get_one::<String>("name")
				.expect("missing required CLI argument")
				.as_bytes()
				.split_2(b'.')
				.ok_or_else(\|\| HgError::unsupported("hg config <section>"))?;

				if let Some(value) = invocation.config.get(section, name) {
				invocation.ui.write_stdout(&format_bytes!(b"{}\n", value))?;
				Ok(())
				} else {
				Err(CommandError::Unsuccessful)
				}
				}