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

rust: replace most "operation" structs with functions...

rust: replace most "operation" structs with functions The hg-core crate has a partially-formed concept of "operation", represented as structs with constructors and a `run` method. Each struct’s contructor takes different parameters, and each `run` has a different return type. Constructors typically don’t do much more than store parameters for `run` to access them. There was a comment about adding an `Operation` trait when the language supports expressing something so general, but it’s hard to imagine how operations with such different APIs could be used in a generic context. This commit starts removing the concept of "operation", since those are pretty much just functions. Differential Revision: https://phab.mercurial-scm.org/D9595

Simon Sapin - - Load All Authors

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             debugrequirements.rs
        
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                | application/rls-services+xml
            
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             / rust / rhg / src / commands / debugrequirements.rs
          
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      use crate::commands::Command;

      use crate::error::CommandError;

      use crate::ui::Ui;

      use hg::operations::find_root;

      use hg::requirements;

      pub const HELP_TEXT: &str = "

      Print the current repo requirements.

      ";

      pub struct DebugRequirementsCommand {}

      impl DebugRequirementsCommand {

          pub fn new() -> Self {

              DebugRequirementsCommand {}

          }

      }

      impl Command for DebugRequirementsCommand {

          fn run(&self, ui: &Ui) -> Result<(), CommandError> {

              let root = find_root()?;

              let mut output = String::new();

              for req in requirements::load(&root)? {

                  output.push_str(&req);

                  output.push('\n');

              }

              ui.write_stdout(output.as_bytes())?;

              Ok(())

          }

      }

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				use crate::commands::Command;
				use crate::error::CommandError;
				use crate::ui::Ui;
				use hg::operations::find_root;
				use hg::requirements;

				pub const HELP_TEXT: &str = "
				Print the current repo requirements.
				";

				pub struct DebugRequirementsCommand {}

				impl DebugRequirementsCommand {
				pub fn new() -> Self {
				DebugRequirementsCommand {}
				}
				}

				impl Command for DebugRequirementsCommand {
				fn run(&self, ui: &Ui) -> Result<(), CommandError> {
				let root = find_root()?;
				let mut output = String::new();
				for req in requirements::load(&root)? {
				output.push_str(&req);
				output.push('\n');
				}
				ui.write_stdout(output.as_bytes())?;
				Ok(())
				}
				}