Trait AddEntries

pub trait AddEntries {
    // Required methods
    fn add_map_entries(
        &self,
        idempotent: bool,
        cargo_rustc_env: &mut CargoRustcEnvMap,
        cargo_rerun_if_changed: &mut CargoRerunIfChanged,
        cargo_warning: &mut CargoWarning,
    ) -> Result<()>;
    fn add_default_entries(
        &self,
        config: &DefaultConfig,
        cargo_rustc_env_map: &mut CargoRustcEnvMap,
        cargo_rerun_if_changed: &mut CargoRerunIfChanged,
        cargo_warning: &mut CargoWarning,
    ) -> Result<()>;
}

This trait should be implemented to allow the vergen emitter to properly emit instructions for your feature.

Required Methods

fn add_map_entries( &self, idempotent: bool, cargo_rustc_env: &mut CargoRustcEnvMap, cargo_rerun_if_changed: &mut CargoRerunIfChanged, cargo_warning: &mut CargoWarning, ) -> Result<()>

Try to add instructions entries to the various given arguments.

• Write to the cargo_rustc_env map to emit ‘cargo:rustc-env=NAME=VALUE’ instructions.
• Write to the cargo_rerun_if_changed vector to emit ‘cargo:rerun-if-changed=VALUE’ instructions.
• Write to the cargo_warning vector to emit ‘cargo:warning=VALUE’ instructions.

Errors

If an error occurs, the vergen emitter will use add_default_entries to generate output. This assumes generating instructions may fail in some manner so a anyhow::Result is returned.

fn add_default_entries( &self, config: &DefaultConfig, cargo_rustc_env_map: &mut CargoRustcEnvMap, cargo_rerun_if_changed: &mut CargoRerunIfChanged, cargo_warning: &mut CargoWarning, ) -> Result<()>

Based on the given configuration, emit either default idempotent output or generate a failue.

• Write to the cargo_rustc_env map to emit ‘cargo:rustc-env=NAME=VALUE’ instructions.
• Write to the cargo_rerun_if_changed vector to emit ‘cargo:rerun-if-changed=VALUE’ instructions.
• Write to the cargo_warning vector to emit ‘cargo:warning=VALUE’ instructions.

Errors

This assumes generating instructions may fail in some manner so a anyhow::Result is returned.

Implementors